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- Title
三维 g-C<sub>3</sub>N<sub>4</sub> 泡沫负载 Cu(OH)<sub>2</sub> 纳米片的 制备及其光催化还原 CO<sub>2</sub> 性能.
- Authors
方 伟; 孙志敏; 赵 雷; 陈 辉; 何 漩; 杜 星; 王大珩
- Abstract
To optimize the gas transfer, adsorption and photo-generated charge separation in the process of photocatalytic CO2 reduction by g-C3N4, the photocatalytic materials were designed from the aspects of foam pore structure and heterojunction construction. The typical g-C3N4 foam was first constructed using surfactant foaming method, and then Cu (OH)2 nanosheets were loaded to prepare the Cu (OH)2/CNF composites with projects of electroless copper plating and hydrogen oxidation treatment. The structure and photocatalytic properties of the as-prepared samples were investigated. The results show that g-C3N4 foam and Cu (OH)2/CNF all demonstrate developed structures with 3D micron pore frameworks, which is conducive to improving CO2 diffusion and adsorption at dynamics during gas-solid catalytic process. The adsorption amounts of CO2 for g-C3N4 foam and Cu (OH)2/CNF are respectively 3.97 cm³/g and 3.59 cm³/g, which are 2.96 times and 2.68 times respectively higher than that of pure g-C3N4 powder. Moreover, many Cu (OH)2 nanosheets are also formed in the Cu (OH)2/CNF samples which provide a way to simultaneously broaden light absorption and form heterojunction between g-C3N4 and Cu (OH)2. This heterojunction can accelerate the separation of photo-generated e--h+ and make photo-generated electrons transfer from g-C3N4 to Cu (OH)2. As a result, the Cu (OH)2/CNF has demonstrated optimal photocatalytic activity with CO production rate at 11.041 μmol·g-1·h-1, which is 2.76 times and 6.83 times respectively higher than that of g-C3N4 foam and g-C3N4 powder.
- Publication
Journal of Materials Engineering / Cailiao Gongcheng, 2023, Vol 51, Issue 4, p141
- ISSN
1001-4381
- Publication type
Article
- DOI
10.11868/j.issn.1001-4381.2022.000120