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| 1 | Anisotropic coding metamaterials and their powerful manipulation of differently polarized terahertz waves显示文摘Metamaterials based on effective media can be used to produce a number of unusual physical properties(for example,negative refraction and invisibility cloaking)because they can be tailored with effective medium parameters that do not occur in nature.Recently,the use of coding metamaterials has been suggested for the control of electromagnetic waves through the design of coding sequences using digital elements‘0’and‘1,'which possess opposite phase responses.Here we propose the concept of an anisotropic coding metamaterial in which the coding behaviors in different directions are dependent on the polarization status of the electromagnetic waves.We experimentally demonstrate an ultrathin and flexible polarization-controlled anisotropic coding metasurface that functions in the terahertz regime using specially designed coding elements.By encoding the elements with elaborately designed coding sequences(both 1-bit and 2-bit sequences),the x-and y-polarized waves can be anomalously reflected or independently diffused in three dimensions.The simulated far-field scattering patterns and near-field distributions are presented to illustrate the dual-functional performance of the encoded metasurface,and the results are consistent with the measured results.We further demonstrate the ability of the anisotropic coding metasurfaces to generate a beam splitter and realize simultaneous anomalous reflections and polarization conversions,thus providing powerful control of differently polarized electromagnetic waves.The proposed method enables versatile beam behaviors under orthogonal polarizations using a single metasurface and has the potential for use in the development of interesting terahertz devices. | Shuo Liu Tie Jun Cui Quan Xu Di Bao Liangliang Du Xiang Wan Wen Xuan Tang Chunmei Ouyang Xiao Yang Zhou Hao Yuan Hui Feng Ma Wei Xiang Jiang Jiaguang Han Weili Zhang Qiang Cheng | 2016 | Light(Science & Applications)2016，5，1： | 36 |
| 2 | THE M/M/c QUEUE WITH PH SYNCHRONOUS VACATIONS显示文摘1.IntroductionRecently,singleserverqueueswithvacationshavebeenstudiedextensivelyfromtheirowntheoreticalinterestaswellastheirapplicationstomanyengineeringsystemssuchascomputers,communicationnetworksandmanufacturingsystems.FOrtheM/G/lqueueingsystemswit... | TIAN Nai shuo (Department of Mathematics, Yanshan University, Qinhuangdao 066004,China) LI Quan lin (National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China) | 2000 | Systems Science and Mathematical Sciences2000，13，1： | 13 |
| 3 | Impact of dissolved organic matter on the photolysis of the ionizable antibiotic norfloxacin显示文摘Norfloxacin(NOR), an ionizable antibiotic frequently used in the aquaculture industry, has aroused public concern due to its persistence, bacterial resistance, and environmental ubiquity.Therefore, we investigated the photolysis of different species of NOR and the impact of a ubiquitous component of natural water — dissolved organic matter(DOM), which has a special photochemical activity and normally acts as a sensitizer or inhibiter in the photolysis of diverse organics; furthermore, scavenging experiments combined with electron paramagnetic resonance(EPR) were performed to evaluate the transformation of NOR in water. The results demonstated that NOR underwent direct photolysis and self-sensitized photolysis via hydroxyl radical(U OH) and singlet oxygen(1O2) based on the scavenging experiments. In addition, DOM was found to influence the photolysis of different NOR species, and its impact was related to the concentration of DOM and type of NOR species. Photolysis of cationic NOR was photosensitized by DOM at low concentration, while zwitterionic and anionic NOR were photoinhibited by DOM, where quenching of U OH predominated according to EPR experiments, accompanied by possible participation of excited triplet-state NOR and1O2. Photo-intermediate identification of different NOR species in solutions with/without DOM indicated that NOR underwent different photodegradation pathways including dechlorination, cleavage of the piperazine side chain and photooxidation, and DOM had little impact on the distribution but influenced the concentration evolution of photolysis intermediates. The results implied that for accurate ecological risk assessment of emerging ionizable pollutants, the impact of DOM on the environmental photochemical behavior of all dissociated species should not be ignored. | Chen Liang Huimin Zhao Minjie Deng Xie Quan Shuo Chen Hua Wang | 2015 | Journal of Environmental Sciences2015，27，1： | 11 |
| 4 | Effective adsorption of sulfamethoxazole, bisphenol A and methyl orange on nanoporous carbon derived from metal-organic frameworks显示文摘Nanoporous carbons(NPCs) derived from metal–organic frameworks(MOFs) are attracting increasing attention in many areas by virtue of their high specific surface area, large pore volume and unique porosity. The present work reports the preparation of an NPC with high surface area(1731 m^2/g) and pore volume(1.68 cm^3/g) by direct carbonization of MOF-5. We examined the adsorption of three typical contaminants from aqueous solutions, i.e., sulfamethoxazole(SMX),bisphenol A(BPA) and methyl orange(MO), by using the as-prepared NPC. The results demonstrated that NPC could adsorb the contaminants effectively, with adsorption capacity(qm) of 625 mg/g(SMX), 757 mg/g(BPA) and 872 mg/g(MO), respectively. These values were approximately 1.0-3.2 times higher than those obtained for single-walled carbon nanotubes(SWCNTs) and commercial powder active carbon(PAC) under the same conditions. With its high surface area and unique meso/macropore structure, the enhanced adsorption of NPC most likely originates from the cooperative interaction of a pore-filling mechanism, electrostatic interaction,and hydrogen bonding. In particular, the p H value has a crucial impact on adsorption, suggesting the significant contribution of electrostatic interaction between NPC and the contaminants. This study provides a proof-of-concept demonstration of MOF-derived nanoporous carbons as effective adsorbents of contaminants for water treatment. | Xiaona Li Hui Yuan Xie Quan Shuo Chen Shijie You | 2018 | Journal of Environmental Sciences2018，30，1： | 9 |
| 5 | Electrochemically enhanced adsorption of PFOA and PFOS on multiwalled carbon nanotubes in continuous flow mode显示文摘It is important to develop efficient technologies on removal of perfluorooctanoic acid(PFOA)and perfluorooctane sulfonate(PFOS)from water due to their wide distribution and potential threat to human health.In this work,a durable and convenient electrosorption device was designed in continuous flow mode to investigate the adsorption of PFOX(X=A and S)on multiwalled carbon nanotubes(MWNTs)from water under electrochemical assistance.The electrosorption experiments were conducted under different influent and electrolyte concentrations,hydraulic retention time(HRT)and electrode distance to optimize the operation.The results showed that the highest removal efficiencies toward both PFOA and PFOS could come up to 90%at 1 V.Compared with open circuit(OC)adsorption under the same conditions,the removal efficiencies were improved by 4.9 times(PFOA)and 4.2 times(PFOS)respectively.In addition,the MWNTs electrode was found to be reusable.These findings provide an efficient method to remove PFOX from water by electrosorption in continuous flow mode. | Shuangyu Wang Xiaona Li Yaobin Zhang Xie Quan Shuo Chen Hongtao Yu Huimin Zhao | 2014 | Chinese Science Bulletin2014，59，23： | 8 |
| 6 | Photocatalytic remediation ofγ-hexachlorocyclohexane contaminated soils using TiO_2 and montmorillonite composite photocatalyst显示文摘TiO2 and montmorillonite composite photocatalysts were prepared and applied in degradingγ-hexachlorocyclohexane (γ-HCH) in soils. After being spiked withγ-HCH, soil samples loaded with the composite photocatalysts were exposed to UV-light irradiation. The results indicated that the photocatalytic activities of the composite photocatalysts varied with the content of TiO2 in the order of 10%<70%<50%<30%. Moreover, the photocatalytic activity of the composite photocatalysts with TiO2 content 30% was higher than that of the pure P25 with the same mass of TiO2. The strong adsorption capacity of the composite photocatalysts and quantum size effect may contribute to its increased photocatalytic activities. In addition, effect of dosage of composite photocatalysts and soil pH onγ-HCH photodegradation was investigated. Pentachlorocyclohexene, trichlorocyclohexene, and dichlorobenzene were detected as photodegradation intermediates, which were gradually degraded with the photodegradation evolution. | ZHAO Xu QUAN Xie CHEN Shuo ZHAO Hui-min LIU Yu | 2007 | Journal of Environmental Sciences2007，19，3： | 5 |
| 7 | Effects of humic acid fractions with different polarities on photodegradation of 2,4-D in aqueous environments显示文摘Four fractions(A,B,C,and D)of humic acids(HAs)were separated based on the polarity from weak to strong.UV-vis absorption and Fourier transform infrared spectroscopy(FTIR)analysis show that the fractions C and Dpossessedmore aromatic C5C content.The influences of HAs and their fractions on the photolysis were investigated by the photodegradation of 2,4-D solutions under simulated solar light irradiation.The degradation rate of 2,4-D was found to decrease in the presence of bulk HAs or their fractions especially at high HAs concentration.The fractions of strong polarity C and D retarded the degradation rate more than the fractions of weak polarity A and B.This could be attributed to the different absorption intensity of the four HAs fractions in the order of D≥C>A>B,and the stronger π-π electron donor-acceptor interactions between the strong polar fractions and 2,4-D. | Chunyan YU Xie QUAN Xiaoxia OU Shuo CHEN | 2008 | Frontiers of Environmental Science & Engineering2008，2，3： | 5 |
| 8 | Electrocatalytic dechlorination of 2,4,5-trichlorobiphenyl using an aligned carbon nanotubes electrode deposited with palladium nanoparticles显示文摘Palladium loaded carbon nanotubes cathode with well-aligned nanotubes array was successfully fabricated on a titanium foil (Pd/CNTs/Ti) using a chemical vapor deposition technique and subsequent electrochemical deposition method. Pd particles were well dispersed on CNTs wall surfaces with average sizes no more than 20 nm, in most cases around 10 nm. Experiments for dechlorination of 2,4,5-trichlorobiphenyl (PCB 29) in methanol/water solution were carried out for the first time using Pd/CNTs/Ti cathode for investigation of its performance in electrocatalytic dechlorination of PCBs. Results show that Pd/CNTs/Ti presented better dechlorination efficiency (up to 90% in 6 h) than Pd/Ti and Pd/graphite cathodes owing to unique properties owned by CNTs, which benefited enhanced dechlorination of PCB 29. Complete dechlorination for PCB 29 was observed and biphenyl was identified to be final dechlorination product. The amount of Pd loading, cathode potential, and electrolytes were found to be key factors influencing dechlorination performance. | CHEN Shuo QIN ZhenLin QUAN Xie ZHANG YaoBin ZHAO HuiMin | 2010 | Chinese Science Bulletin2010，55，4： | 4 |
| 9 | Kinetics of enhanced adsorption by polarization for organic pollutants on activated carbon fiber显示文摘The adsorption kinetics for model pollutants on activated carbon fiber(ACF)by polarization was investigated in this work.Kinetics data obtained for the adsorption of these model pollutants at open-circuit,400 mV,and−400 mV polarization were applied to the Lagergren equation,and adsorption rate constants(Ka)were determined.With the anodic polarization of 400 mV,the capacity of sodium phenoxide was increased from 0.0083 mmol/g at open-circuit to 0.18 mmol/g,and a 17-fold enhancement was achieved;however,the capacity of p-nitrophenol was decreased from 2.93 mmol/g at open-circuit to 2.65 mmol/g.With the cathodal polarization of−400 mV,the capacity of aniline was improved from 3.60 mmol/g at open-circuit to 3.88 mmol/g;however,the capacity of sodium dodecylben-zene sulfonate was reduced from 2.20 mmol/g at open-circuit to 1.59 mmol/g.The enhancement for electrosorption changed with dif ferent groups substituting.Anodic polarization enhances the adsorption of benzene with the electron-donating group.But whether anodic or not,cathodal polariza-tion had less effect on the adsorption of electron-accepting aromatic compounds,and decreased the adsorption capacity of benzene-bearing donor-conjugate bridge-acceptor,while increasing its adsorption rate.Electrostatic interaction played a very important role in the electrosorption of ion-pollutants. | HAN Yanhe QUAN Xie ZHAO Huimin CHEN Shuo ZHAO Yazhi | 2007 | Frontiers of Environmental Science & Engineering2007，1，1： | 4 |
| 10 | Microwave assisted wet oxidation of p-nitrophenol显示文摘Aqueous solution of p-nitrophenol (PNP) was treated continuously by microwave assisted wet oxidation while flowing through a granular activated carbon (GAC) fixed bed. PNP was pre-adsorbed onto GAC prior to being put into the reactor so as to prevent PNP adsorption on GAC during microwave irradiation. PNP solutions with different initial concentration (218.6 mg/L and 1200 mg/L) were treated under conditions of microwave power 500 W, liquid flow 6.4 mL/min and air flow 40 mL/min or 60 mL/min. The results indicated that the removal of PNP was higher than 90% and more than 65% PNP was mineralized. Phenol, nitrobenzene, hydroquinone and benzoquinone occurred as course products during the operation process, which were degraded further. The biodegradability of the outflow was improved greatly by microwave assisted wet oxidation. | BO Longli CHEN Shuo QUAN Xie LIU Xitao ZHAO Huimin | 2005 | Science China(Technological Sciences)2005，48，2： | 3 |
| 11 | Competitive adsorption and desorption of copper and lead in some soil of North China显示文摘 | Fengjic ZHANG Xiaoxia OU Shuo CHEN Chunqiu RAN Xie QUAN | 2012 | Frontiers of Environmental Science & Engineering2012，6，4： | 3 |
| 12 | Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology显示文摘Surface-enhanced Raman scattering(SERS)and photoluminescence(PL)are important photoexcitation spectroscopy techniques;however,understanding how to analyze and modulate the relationship between SERS and PL is rather important for enhancing SERS,having a great effect on practical applications.In this work,a charge-transfer(CT)mechanism is proposed to investigate the change and relationships between SERS and PL.Analyzing the change in PL and SERS before and after the adsorption of the probe molecules on Nd-doped ZnO indicates that the unique optical characteristics of Nd^(3+) ions increase the SERS signal.On the other hand,the observed SERS can be used to explain the cause of PL background reduction.This study demonstrates that modulating the interaction between the probe molecules and the substrate can not only enhance Raman scattering but also reduce the SERS background.Our work also provides a guideline for the investigation of CT as well as a new method for exploring fluorescence quenching. | Shuo Yang Jiacheng Yao Yingnan Quan Mingyue Hu Rui Su Ming Gao Donglai Han Jinghai Yang | 2020 | Light(Science & Applications)2020，9，1： | 3 |
| 13 | Design,synthesis characterization and in vitro biological activity of a series of 3-aryl-6-(bromoarylmethyl)-7H-thiazolo[3,2-b]-1,2,4-triazin-7-one derivatives as the novel acetylcholinesterase inhibitors显示文摘Bromination 被用作策略在药用的化学改进生物活动。以便在与 7H-thiazolo 的新奇 acetylcholinesterase 禁止者的 structureactivity 关系上学习[ 3,2-b ]-1, 2 , 4-triazin-7-one 支架基于我们的以前的工作并且分子的建模,一系列新奇3-aryl-6-( bromoarylmethyl )-7H-thiazolo[3,2-b]-1, 2 , 4-triazin-7-one 衍生物被分子的停靠设计,由集体系列,红外线的系列,质子 NMR 和元素的分析综合了并且描绘。疼痛的学习禁止的活动与 huperzine 用 Ellman 比色的试金被执行 -- 是的 A 积极控制。大多数所有目标混合物在 10 mol/L 展出了超过 45% 抑制。初步的 structureactivity 关系在在父母原子核的 C6 位置的苯基戒指是溴原子和氢氧根组在目标混合物的疼痛禁止的活动的起的重要角色。 | He Nan Xu Zhe Jin Si Jie Liu Hong Min Liu Shuo Li Huang Quan Lin David Chicheong Wan Chun Hu | 2012 | Chinese Chemical Letters2012，23，7： | 3 |
| 14 | Enhanced photodegradation of phenolic compounds by adding TiO_2 to soil in a rotary reactor显示文摘Photodegradation of pentachlorophenol (PCP) and p-nitrophenol (PNP) in soil was carried out in a designed rotary reactor, which can provide the soil particles with continually uniform irradiation, and on a series of thin soil layers. TiO2, as a kind of environmental friendly photocatalyst, was introduced to the soil to enhance the processes. Compared with that on the soil layers, photodegradation of PCP at initial concentration of 60 mg/kg was improved dramatically in the rotary reactor no matter whether TiO2 was added, with an increase of 3.0 times in the apparent first-order rate constants. The addition of 1 wt% TiO2 furthered the improvement by 1.4 times. Without addition of TiO2, PNP(initial concentration of 60 mg/kg) photodegradation rate in the rotary reactor was similar to that on the soil layers. When 1 wt% additional TiO2 was added, PNP photodegradation was enhanced obviously, and the enhancement in the rotary reactor was 2 times of that on the soil layers, which may be attributed to the higher frequency of the contact between PNP on soil particles and the photocatalyst. The effect of soil pH and initial concentrations of the target compounds on the photodegradation in the rotary reactor was investigated. The order of the degradation rate at different soil pH was relative to the aggregation of soil particles during mixing in the rotary reactor. Photodegradation of PCP and PNP at different initial concentrations showed that addition of TiO2 to enhance the photodegradation was more suitable for contaminated soil with higher concentration of PCP, while was effective for contaminated soil at each PNP concentration tested in our study. | WANG Jing-xian CHEN Shuo QUAN Xie ZHAO Hui-min ZHAO Ya-zhi | 2006 | Journal of Environmental Sciences2006，18，6： | 2 |
| 15 | Solubility and sorption of petroleum hydrocarbons in water and cosolvent systems显示文摘The solubility and sorption of oil by uncontaminated clay loam and silt loam soils were studied from water and cosolvent/water solutions using batch techniques. The data obtained from the dissolution and sorption experiments were used to evaluate the applicability of the cosolvent theory to oil as a complex mixture. Aqueous solubility and soil-water distribution coeffcients (Kd,w, L/kg) were estimated by extrapolating from cosolvent data, with a log-linear cosolvency model, to the volume fraction of cosolvent (fc) 0, and were compared with direct aqueous measurements. The extrapolated water solubility was 3.16 mg/L, in good agreement with the directly measured value of 3.83 mg/L. Extrapolated values of Kd,w for the two soils were close to each other but consistently higher than the values from direct aqueous measurements, because of the presence of dissolved organic carbon (DOC). The partition coe?cient (KDOC) between the DOC and the freely dissolved phase and the OC-normalized sorption coeffcient (KOC) were determined. The average values of logKDOC and logKOC were estimated as 4.34 and 3.32, respectively, giving insight into the possibility of oil becoming mobilized and/or of the soil being remedied. This study revealed that the cosolvency model can be applied to a broader range of hydrophobic organic chemicals (HOCs) than has been previously thought. The results aided in a reliable determination of water solubility and sorption coeffcients and provide information about the fate of oil in solvent-contaminated environment. | Chen Hong Chen Shuo Quan Xie Zhao Yazhi Zhao Huimin | 2008 | Journal of Environmental Sciences2008，20，10： | 2 |
| 16 | Preparation and characteri-zation of aligned carbon nanotubes coated with titania nanoparticles显示文摘Well-aligned carbon nanotubes coated with titania (TiO2) were prepared by atmospheric pressure chemical vapor deposition (APCVD),and the sequential experiments including carbon nano- tubes preparation,air-oxidation purification and tita- nia nanoparticles coating were performed at different temperatures in the same reactor. Scanning electron microscopy (SEM),transmission electron microscope (TEM),X-ray diffraction patterns (XRD),and energy- dispersive X-ray spectra (EDX) demonstrated the well-aligned nanotubes and TiO2 nanoparticles in close proximity and the average diameter of TiO2 nanoparticles was 11.5 nm. | YU Hongtao ZHAO Huimin QUAN Xie CHEN Shuo | 2006 | Chinese Science Bulletin2006，51，18： | 2 |
| 17 | Photocatalytic reaction by Fe(III)–citrate complex and its effect on the photodegradation of atrazine in aqueous solution显示文摘 | Xiaoxia Ou Xie Quan Shuo Chen Fengjie Zhang Yazhi Zhao | 2008 | Journal of Photochemistry & Photobiology A: Chemistry2008，，2： | 2 |
| 18 | Enhanced heterogeneous Fenton-like activity by Cu-dopecl BiFeO3 perovskite for degradation of organic pollutants显示文摘Heterogeneous Fenton-like reaction has been extensively investigated to eliminate refractory organic contaminants in wastewater,but it usually shows low catalytic performance due to difficulty in reduction from Fe(Ⅲ)to Fe(Ⅱ).In this study,enhanced catalytic efficiency was obtained by employing Cu-doped BiFeO3 as heterogeneous Fenton-like catalysts,which exhibited higher catalytic perfor;nance toward the activation of H2O2 for phenol degradation than un-doped BiFeO3.. BiFe0.8Cu0.2O3 displayed the best performance,which yielded 91% removal of phenol (10mg L^-1) in 120min.The pseudo first-order kinetic rate constant of phenol degradation in BiFe0.8Cu0.2O3 catalyzed heterogeneous Fenton-like reaction was 5times higher than those of traditional heterogeneous Fenton-like catalysts,such as Fe3O4 and goethite.The phenol degradation efficiency could still reach 83% after 4 cycles,which implied the good stability of BiFe0.8Cu0.2O3.The high catalytic activity of BiFe0.8Cu0.2O3 was attributed to the fact that the doping Cu into BiFeO3 could promote the generation of Fe(Ⅱ)in the catalyst and then facilitate the activation of H2O2 to degrade the organic pollutants. | Jie Mao Xie Quan Jing Wang Cong Gao Shuo Chen Hongtao Yu Yaobin Zhang | 2018 | Frontiers of Environmental Science & Engineering2018，12，6： | 2 |
| 19 | Carbon nanotubes-incorporated MIL-88B-Fe as highly efficient Fenton-like catalyst for degradation of organic pollutants显示文摘Iron-based metal organic frameworks have been verified to be efficient heterogeneous Fenton catalysts due to their open pore channels and highly uniform distribution of metallic centers.In these catalysts,however,the iron element is mainly in the form of Fe(III),which results in a process required to reduce Fe(III)to Fe(II)to initiate Fenton reaction.To address this problem,carbon nanotubes(CNTs)with electron-rich oxygen-functional groups on the surface were incorporated into the metal organic frameworks(MIL-88B-Fe)to improve Fe(II)content for an enhanced Fenton-like performance.The prepared CNT@MIL-88B-Fe(C@M)showed much stronger catalytic ability toward H2O2 than MIL-88B-Fe.The pseudo-first-order kinetic constant for phenol degradation by C@M(0.32 min–1)was about 7 times that of MIL-88B-Fe,and even higher than or comparable to the values of reported heterogeneous Fenton-like catalysts.Moreover,the Fenton-like system could effectively degrade various kinds of refractory organic pollutants and exhibited excellent catalytic activity over a wide pH range(4–9).XPS analysis confirmed that Fe(II)content of the catalyst gradually increased with CNT loadings.Electron spin resonance analysis showed that the signal intensity(?OH)of C@M was much higher than MIL-88B-Fe,which was consistent with the degradation efficiency of pollutants.Furthermore,the Fe(II)content of the catalyst gradually increased along with the oxygen-functional group content of CNTs.The result demonstrated that oxygen-containing functional groups of CNTs have a significant impact on the enhanced catalytic performance of C@M.This study provides a new insight to enhance Fenton reaction by using nanocarbon materials. | Hang Zhang Shuo Chen Haiguang Zhang Xinfei Fan Cong Gao Hongtao Yu Xie Quan | 2019 | Frontiers of Environmental Science & Engineering2019，13，2： | 2 |
| 20 | Quantitative predictive models for octanol-air partition coefficients of polybrominated diphenyl ethers at different temperatures显示文摘 | CHEN Jingwen HARNER T YANG Ping QUAN Xie CHEN Shuo SCHRAMM K W KETTRUP A | 2002 | Chemosphere2002，51，7： | 1 |
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