【摘要】 利用介孔SiO₂作为硬模板,采用CH₄N₂S和Ni（CH₄N₂S）₄作为前驱体,通过一步退火法成功制备了介孔S-g-C₃N₄负载NiS₂复合光催化剂。利用介孔材料的有效传质效应;同时利用Ni-S配位原子层作为S-g-C₃N₄和NiS₂的过渡连接层,确保了S-g-C₃N₄和NiS₂间光生载流子的高效传输;最后利用非贵金属NiS₂作为助催化剂来降低析氢过电位,促进H⁺的电催化还原,这为获得高效的g-C₃N₄基光催化产氢材料提高了保障。在光催化产氢性能测试中,介孔NiS₂/S-g-C₃N₄复合材料表现出优异的光催化性能,在可见光下（λ≥420 nm）100-NiSCN样品的产氢性能达到141.33μmol/（g·h）,是纯g-C₃N₄的46倍。该研究为制备高效的g-C₃N₄基光催化剂提供了一种简单、高效、经济的设计思路,并为大规模工业化生产及应用提供了理论基础。更多还原

【Abstract】 In this paper, mesoporous S-g-C₃N₄ supported NiS₂ composite photocatalyst was successfully prepared by one-step annealing using mesoporous SiO₂ as hard template and CH₄N₂S and Ni（CH₄N₂S）₄ as precursors. Firstly, the effective mass transfer effect of mesoporous materials was used. Then, the Ni-S coordination atomic layer was used as the transition connection layer between S-g-C₃N₄ and NiS₂ to ensure the efficient transmission of photo-generated carriers. At last, the non-precious metal NiS₂ was used as the cocatalyst to reduce overpotential of the hydrogen evolution and promote the electrocatalytic reduction of H⁺, which provided a guarantee for obtaining efficient g-C₃N₄-based photocatalytic hydrogen-producing materials. In the photocatalytic hydrogen production test, the mesoporous NiS₂/S-g-C₃N₄ composite material showed excellent photocatalytic performance, and the hydrogen production performance of the 100-NiSCN reached 141.33 μmol/（g·h）, which was 46 times that of pure g-C₃N₄ under visible light（λ≥420 nm）. It provided a simple, efficient and economical design idea for the preparation of efficient g-C₃N₄ based photocatalyst, and provided a theoretical basis for large-scale industrial production and application.更多还原