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| 1 | Microwave Synthesis of Cuprous Oxide Micro-/Nanocrystals with Different Morphologies and Photocatalytic Activities显示文摘Cuprous oxide micro-/nanocrystals were synthesized by using a simple liquid phase reduction process under microwave irradiation.Copper sulfate was used as the starting materials and macromolecule surfactants served as the templates.The morphologies phase and optical properties of them are characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and ultraviolet-visible diffuse reflection absorptive spectra (UV-vis/DRS),respectively.The crystals had four different shapes,namely spheres,strips,octahedrons,and dandelions.The photocatalytic behavior of the cuprous oxide particles were investigated by monitoring the degradation of rhodamine B.In spite of the different morphologies,all of the cuprous oxide micro-/nanocrystals exhibited photocatalytic activities under visible light irradiation in the following order:dandelions,strips,spheres,and octahedral crystals.The photocatalytic degradation rates of rhodamine B are 56.37%,55.68%,51.83% and 46.16%,respectively.The morphology affects significantly the photocatalytic performance. | Qingwei Zhu Yihe Zhang Jiajun Wang Fengshan Zhou Paul K. Chu | 2011 | Journal of Materials Science & Technology2011，27，4： | 5 |
| 2 | Facile fabrication of a robust super-hydrophobic surface on magnesium alloy显示文摘 | Qingwei Chu Jun Liang Jingcheng Hao | 2014 | Colloids and Surfaces A: Physicochemical and Engineering Aspects2014，，： | 1 |
| 3 | A Spiral Graphene Framework Containing Highly Ordered Graphene Microtubes for Polymer Composites with Superior Through-Plane Thermal Conductivity显示文摘As the power density of electronic devices increases,there has been an urgent demand to develop highly conductive polymer composites to address the accompanying thermal management issues.Due to the ultra-high intrinsic thermal conductivity,graphene is considered a very promising filler to improve the thermal conductivity of polymers.However,graphene-based polymer composites prepared by the conventional mixing method generally have limited thermal conductivity,even under high graphene loading,due to the failure to construct efficient heat transfer pathways in the polymer matrix.Here,a spiral graphene framework(SGF)containing continuous and highly ordered graphene microtubes was developed based on a modified CVD method.After embedding into the epoxy(EP)matrix,the graphene microtubes can act as efficient heat pathways,endowing the SGF/EP composites with a high through-plane thermal conductivity of 1.35 W·m^(-1)·K^(-1) at an ultralow graphene loading of 0.86 wt%.This result gives a thermal conductivity enhancement per 1 wt%filler loading of 710%,significantly outperforming various graphene structures as fillers.In addition,we demonstrated the practical application of the SGF/EP composite as a thermal interface material for efficient thermal man-agement of the light-emitting diode(LED). | Jinrui Gong Xue Tan Qilong Yuan Zhiduo Liu Junfeng Ying Le Lv Qingwei Yan Wubo Chu Chen Xue Jinhong Yu Kazuhito Nishimura Nan Jiang Cheng-Te Lin Wen Dai | 2022 | Chinese Journal of Chemistry2022，40，3： | 0 |
| 4 | Annual Report of RF Surface Technology Research Group显示文摘RF Surface Technology Research Group was founded in August 2019.It was evolved from the former Supercon-ducting Radio Frequency(SRF)research group of Linac center.The primary research topics will be presented in this report. | Tan Teng Yang Ziqin You Zhiming Chu Qingwei Huang Shichun Xiong Pingran Guo Hao Song Yukun Wu Andong Li Lu Pan Feng Liu Xinmeng Lu Ming | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 5 | Optimization of the Coating Process for Nbg_(3)Sn Cavity显示文摘After many years of worldwide exploration and improvement of the post treatment process,niobium(Nb)cavities are now approaching their fundamental limits both in terms of maximum acceleration field and in terms of surface resistance at typical operating temperatures. | Yang Ziqin He Yuan You Zhiming Guo Hao Xiong Pingran Song Yukun Zhang Shengxue Lu Ming Lin Zeqiang Huang Shichun Wu Andong Chu Qingwei Tan Teng Pan Feng Zhang Shenghu | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 6 | 6-6 Nb/Cu SRF Cavity R&D Activity at IMP显示文摘SRF cavities are operated at Meissner state,which al-lows the electro-magnetic wave only interacts with the very surface of the cavity.The penetration depth of Nb at 4.2 is^100 nm,which means more than 99%of the expensive SRF grade Nb used on the SRF cavity is not involved in the interaction with the E-M wave.Fig.1 shows the schematics diagram of the interac-tion between magnetic field and a Nb coated Cu cavity.With a Nb film thicker than 3λ,the copper hide behind wouldn't be able to see the E-M wave nor generate RF dissipation. | Tan Teng Pan Feng Huang Shichun Zhang Cong Chu Qingwei He Yuan Zhao Hongwei | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 7 | 6-8 Electropolishing of Niobium from Choline Chloride Based Ionic Liquid显示文摘The BCP solutions use mixed acids based on HF acid,which carry significant potential safety hazard during operation.Developing a safe and green polishing solution without HF is an important research subject for cavity’s surface treatment[1].We adopt green ionic liquids for polishing solution of electropolish niobium samples.In the experiment,niobium samples were electropolished from a 1:2:1 Choline chloride–urea-ammonium fluoride ionic liquid under different conditions(Fig.1).The surface of Nb sample without any treatment is dark and uneven(1#of Fig.1).After electropolished at 50℃,the surface of Nb sample become smooth,but the glossiness is not good(2#of Fig.1).Improving the electropolishing temperature to 80℃,the glossiness of Nb becomes good and the surface becomes even(3#of Fig.1).In order to compare the electropolishing effect intuitively,put a ruler before the treated samples. | Chu Qingwei He Yuan Zhang Shenghu You Zhiming Guo Hao Xiong Pingran | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 8 | 6-15 Plasma Discharge for In-situ Cleaning of SRF Cavities显示文摘Field emission occurred in superconducting radio-frequency(SRF)cavities is the major obstacle of the accelerators operating at high gradient,which partly caused by the inner surface contamination,such as the hydrocarbons and the absorbed residual gas.The plasma processing can be an effective method to solve the field emission issues.The properties of low temperature glow discharge,which was argon plasma with the chemically reactive oxygen,were investigated for the SRF cavities used for CADS project. | Wu Andong Yang Lei Li Yongming Yue Weiming Li Chunlong Xiong Pingran Guo Hao Song Yukun Chu Qingwei Jiang Tiancai Zhang Shengxue You Zhiming Zhang Shenghu He Yuan Zhao Hongwei | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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