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364 results on '"Zhou, Guilin"'

21. High efficient CuCeO2‐δ/SiO2 catalyst for RWGS reaction: impact of Ce content and loading sequence.

Author

Zhao, Shan, Yang, Le, Yao, Shen, Dai, Yahong, Chen, Shuang, Zeng, Jia, Jia, Aiping, Xie, Hongmei, and Zhou, Guilin

Subjects
CATALYTIC hydrogenation, FOSSIL fuels, WATER-gas, POLAR effects (Chemistry), CARBON emissions
Abstract

The extensive use of fossil energy leads to wanton emission of CO2 and serious environmental problems. The exploration of high‐performance catalysts plays a pivotal role in CO2 resource utilization. In this paper, CuCeyK catalysts are prepared by wet impregnation method using ordered mesoporous SiO2 as support for the reverse water gas shift (RWGS) reaction. The physicochemical properties of the prepared catalysts are characterized by H2‐TPR, BET, XRD, Quasi in‐situ XPS, H2‐TPD, and CO2‐TPD techniques. The results demonstrate thatthe Cu0 species can form synergistic effects with oxygen vacancies (Ov) to enhance the CuCeyK catalytic performance. Additionally, the electronic effects between Ce and Cu not only enhances the adsorption and activation performances of the catalyst towards CO2 and H2 molecules, but also effectively suppresses the sintering of Cu0 species, thereby enhancing the stability of the corresponding catalyst. It is worth mentioning that the Ce content also directly affects the catalytic performances of the CuCeyK catalyst. The CuCe15K catalyst with a Ce content of 15% displays excellent CO2 hydrogenation performances, and the CO2 conversion and CO selectivity up to 41 % and 100 % at 420 °C, respectively. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Surface modified molybdenum disulfide nanosheets for corrosion resistance improvement on polyurethane coatings.

Author

Zhou, Guilin, Wang, Jingchuan, Cheng, Wenjie, Nan, Hui, Zhao, Xiaochong, Wei, Haomin, Xue, Caihong, Ma, Yuehua, and Yang, Pan

Subjects
SALT spray testing, SILANE coupling agents, COMPOSITE coating, CONTACT angle, CROSSLINKED polymers, MOLYBDENUM disulfide
Abstract

Organic–inorganic hybrid coating has been applied on metallic corrosion protection effectively. Molybdenum disulfide (MoS2) nanosheets with graphene-like two-dimensional lamellar structure were an anticorrosion inorganic additive, rendering the organic coating better corrosion resistant. However, the aggregation and poor solubility are still current issues that should be addressed. Functionalization MoS2 nanosheets with surface modified by polydopamine (PDA) and silane coupling agent (KH560) were prepared in polyurethane (PU) composite coatings to obtain dense and intact multilayer network structure coatings for corrosion protection. KH560-PDA-MoS2/PU coating with crosslinked polymer network structure has a high impedance modulus, large contact angle, and strong hydrophobicity. The coating meets the national technical standards for salt spray testing and nitric acid (HNO3) titration testing, demonstrating excellent corrosion resistance. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Li1.5Al0.5Zr1.5(PO4)3-coated Li1.2Mn0.54Ni0.13Co0.13O2 cathode materials with high lithium-ion diffusion rate and long cycling stability for lithium-ion batteries.

Author

Fu, Yunwang, Liang, Hongqin, Wang, Jie, Wang, Guoxing, Lei, Wenyang, Li, Jie, Huang, Qiushi, Hu, Xuebu, Liu, Xuecheng, and Zhou, Guilin

Abstract

Lithium rich-layered oxides have attracted widespread attention due to their high specific capacity and high energy density. However, severe lithium nickel mixing, poor lithium-ion migration rate, and surface side reactions greatly limit their development. Li1.2Mn0.54Ni0.13Co0.13O2 with different contents of Li1.5Al0.5Zr1.5(PO4)3 (LAZPO-LMNCO) is synthesized by wet chemistry and high-temperature solid-phase method. Fast lithium-ion conductor LAZPO coating effectively suppresses side reactions between the electrolyte and LMNCO surface and stabilizes the layered structure, which reduces lithium nickel mixing and increases the migration rate of lithium ions, thereby improving cycling stability. Lithium-ion diffusion coefficient of 3 wt% LAZPO-LMNCO electrode reaches 5.8 times that of pristine LMNCO. At 1C, the 3 wt% LAZPO-LMNCO electrode provides a capacity retention rate of 90.4% after 250 cycles, compared to 82.8% of LMNCO after 100 cycles. Even a high rate of 5C, it still maintains a capacity retention rate of 88.4% after 350 cycles. This work provides an effective method for reducing surface side reactions and improving electrochemical performance of Li1.2Mn0.54Ni0.13Co0.13O2. [ABSTRACT FROM AUTHOR]

Published
2024
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30. Deep Learning Based Gesture Recognition and Its Application in Interactive Control of Intelligent Wheelchair

Author

Zhou, Xingqun, Wang, Fei, Wang, Jianhui, Wang, Yufan, Yan, Junlang, Zhou, Guilin, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Yu, Haibin, editor, Liu, Jinguo, editor, Liu, Lianqing, editor, Ju, Zhaojie, editor, Liu, Yuwang, editor, and Zhou, Dalin, editor

Published
2019
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