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177 results on '"Gao, Qiongzhi"'

14. Synergistic Photocatalytic CO2 Reduction and Methanol Oxidation via Self-Photogenerated Oxygen Vacancy-Rich TiO2 Nanostructures.

Author

Mao, Haoning, Tan, Yu, Chen, Qiwen, Cai, Minying, Xu, Chao, Yang, Tianzhen, Gao, Qiongzhi, Zhang, Shengsen, Fang, Yueping, Liu, Shijun, Peng, Feng, and Yang, Siyuan

Abstract

Integrating CO2 reduction with methanol oxidation presents a promising alternative strategy to store solar energy in CO2 reduction and produce more sustainable clean fuels and chemicals products, while identifying the carbon sources in the final products and elucidating the interactions between CO2 and methanol within such a mixed system is still particularly challenging. Herein, this study explores the efficiency of synergistic photocatalytic CO2 reduction and methanol oxidation via self-photogenerated oxygen vacancy-rich TiO2 nanostructures. Employing NMR spectroscopy and GC–MS analysis for 13CO2 isotope tracing samples, the exact carbon sources in both liquid and gas-phase products were clearly figure out. Moreover, through in situ DRIFTS analysis and DFT calculations, the crucial role of oxygen vacancies in enhancing catalytic activity and selectivity is revealed, and the CO2 reduction and methanol oxidation pathway on oxygen vacancy-rich TiO2 nanostructures are proposed. Consequently, our findings offer profound implications for advancing the field of synergistic photocatalytic processes, aiming to generate high-value chemical fuels sustainably. [ABSTRACT FROM AUTHOR]

Published
2024
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35. Photoinduced Cu+/Cu2+interconversion for enhancing energy conversion and storage performances of CuO based Li-ion battery

Author

Zhang, Qiuman, Wei, Meng, Dong, Qianwen, Gao, Qiongzhi, Cai, Xin, Zhang, Shengsen, Yuan, Teng, Peng, Feng, Fang, Yueping, and Yang, Siyuan

Abstract

The photoinduced Cu+/Cu2+interconversion significantly improves energy conversion and discharging-charging performance of the assembled CuO based photoassisted Li-ion batteries.

Published
2023
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36. Phase‐Controllable Growth NixPy Modified CdS@Ni3S2 Electrodes for Efficient Electrocatalytic and Enhanced Photoassisted Electrocatalytic Overall Water Splitting

Author

Dong, Qianwen, primary, Li, Mingli, additional, Sun, Mingshuang, additional, Si, Fangyuan, additional, Gao, Qiongzhi, additional, Cai, Xin, additional, Xu, Yuehua, additional, Yuan, Teng, additional, Zhang, Shengsen, additional, Peng, Feng, additional, Fang, Yueping, additional, and Yang, Siyuan, additional

Published
2021
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37. Fabrication and Application of Photocatalytic Composites and Water Treatment Facility Based on 3D Printing Technology

Author

Dong Xianming, Zhou Wuyi, Di Liu, Chen Ziyao, Gao Qiongzhi, Dongsong Lin, Zheng Wenxu, and Mai Zhirui

Subjects
Materials science, Polymers and Plastics, Composite number, Organic chemistry, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, composites, Article, Matrix (chemical analysis), chemistry.chemical_compound, QD241-441, Polylactic acid, photocurable coating, water treatment equipment, polylactic acid, titanium dioxide, General Chemistry, 3D printing, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Wastewater, chemistry, Chemical engineering, Titanium dioxide, Photocatalysis, Degradation (geology), Water treatment, 0210 nano-technology
Abstract

Currently, the degradation of organic pollutants in wastewater by photocatalytic technology has attracted great attention. In this study, a new type of 3D printing material with photocatalytic activity was first prepared to print a water treatment equipment, and then a layer of silver-loaded TiO2 was coated on the equipment to further improve the catalytic degradation performance. The composite filaments with a diameter of 1.75 ± 0.05 mm were prepared by a melt blending method, which contained 10 wt% of modified TiO2 and 90 wt% of PLA. The silver-loaded TiO2 was uniformly coated on the equipment through a UV-curing method. The final results showed that those modified particles were uniformly dispersed in the PLA matrix. The stable printing composite filaments could be produced when 10 wt% TiO2 was added to the PLA matrix. Moreover, the photocatalytic degradation performance could be effectively improved after 5 wt% of silver loading was added. This novel facility showed good degradability of organic compounds in wastewater and bactericidal effect, which had potential applications for the drinking water treatment in the future.

Published
2021

40. Ni Foam Supported TiO2 Nanorod Arrays with CdS Branches: Type II and Z‐Scheme Mechanisms Coexisted Monolithic Catalyst Film for Improved Photocatalytic H2 Production.

Author

Li, Mingli, Wei, Meng, Xie, Xiaoer, Dong, Qianwen, Gao, Qiongzhi, Cai, Xin, Zhang, Shengsen, Peng, Feng, Fang, Yueping, and Yang, Siyuan

Subjects
CATALYSTS, NICKEL catalysts, ENERGY storage, ENERGY conversion, CHARGE transfer, FOAM, TITANIUM dioxide
Abstract

TiO2 has garnered a flourish of interest in the field of energy storage and energy conversion. Herein, a new generation of 3D Ni foam supported in situ grown 1D TiO2 nanoarray (Ni/TiO2) is successfully prepared, through an easy solution‐phase hydrothermal process, and then CdS nanorods branched Ni/TiO2 nanoarrays are fabricated (Ni/TiO2@CdS). Their formation parameters and growth mechanism are carefully studied. Both Ni/TiO2 and Ni/TiO2@CdS monolithic catalysts exhibit advantaged photocatalytic (PC) and photoelectrocatalytic (PEC) water splitting properties compared with that of most previously reported TiO2‐based film photocatalysts. Mechanism investigation reveals that both type II and Z‐scheme charge transport mechanisms coexist in Ni/TiO2@CdS sample, and an additional Z‐scheme charge transfer effect accelerates the photogenerated charge separation and transport efficiency. This study may open a new avenue for the utilization of TiO2‐based film catalysts in a broader field of energy and environmental catalysis areas. [ABSTRACT FROM AUTHOR]

Published
2022
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50. Phase‐Controllable Growth NixPy Modified CdS@Ni3S2 Electrodes for Efficient Electrocatalytic and Enhanced Photoassisted Electrocatalytic Overall Water Splitting.

Author

Dong, Qianwen, Li, Mingli, Sun, Mingshuang, Si, Fangyuan, Gao, Qiongzhi, Cai, Xin, Xu, Yuehua, Yuan, Teng, Zhang, Shengsen, Peng, Feng, Fang, Yueping, and Yang, Siyuan

Subjects
HYDROGEN evolution reactions, SOLAR energy conversion, OXYGEN evolution reactions, DENSITY functional theory, HYDROGEN production, ELECTRODES, NICKEL mining, SOLAR energy
Abstract

The rational design and construction of cost‐effective nickel‐based phosphide or sulfide (photo)electrocatalysts for hydrogen production from water splitting has sparked a huge investigation surge in recent years. Whereas, nickel phosphides (NixPy) possess more than ten stoichiometric compositions with different crystalline. Constructing NixPy with well crystalline and revealing their intrinsic catalytic mechanism at atomic/molecular levels remains a great challenge. Herein, an easy‐to‐follow phase‐controllable phosphating strategy is first proposed to prepare well crystalline NixPy (Ni3P and Ni12P5) modified CdS@Ni3S2 heterojunction electrocatalysts. It is found that Ni3P modified CdS@Ni3S2 (CdS@Ni3S2/Ni3P) exhibits remarkable stability and bifunctional electrocatalytic activities in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Density functional theory results suggest that P–Ni sites and P sites in CdS@Ni3S2/Ni3P, respectively, serve as OER and HER active sites during electrocatalytic water splitting processes. Moreover, benefiting from the advantageous photocatalyst@electrocatalyst core@shell structure, CdS@Ni3S2/Ni3P delivers an advantaged photoassisted electrocatalytic water splitting property. The champion electrical to hydrogen and solar to hydrogen energy conversion efficiencies of CdS@Ni3S2/Ni3P, respectively, reach 93.35% and 4.65%. This work will provide a general guidance for synergistically using solar energy and electric energy for large‐scale H2 production from water splitting. [ABSTRACT FROM AUTHOR]

Published
2021
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