Wang Lan, Bahnemann Detlef W, Bian Liang, Dong Guohui, Zhao Jie, Wang Chuanyi
Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi, 830011, China.
Laboratorium für Nano- und Quantenengineering, Leibniz Universität Hannover, Schneiderberg 39, 30167, Hannover, Germany.
Angew Chem Int Ed Engl. 2019 Jun 11;58(24):8103-8108. doi: 10.1002/anie.201903027. Epub 2019 May 13.
Two-dimensional (2D) photocatalysts are highly attractive for their great potential in environmental remediation and energy conversion. Herein, we report a novel layered zinc silicate (LZS) photocatalyst synthesized by a liquid-phase epitaxial growth route using silica derived from vermiculite, a layered silicate clay mineral, as both the lattice-matched substrate and Si source. The epitaxial growth of LZS is limited in the 2D directions, thus generating the vermiculite-type crystal structure and ultrathin nanosheet morphology with thicknesses of 8-15 nm and a lateral size of about 200 nm. Experimental observations and DFT calculations indicated that LZS has a superior band alignment for the degradation of organic pollutants and reduction of CO to CO. The material exhibited efficient photocatalytic performance for 4-chlorophenol (4-CP) degradation and CO conversion into CO and is the first example of a claylike 2D photocatalyst with strong photooxidation and photoreduction capabilities.
二维（2D）光催化剂因其在环境修复和能量转换方面的巨大潜力而极具吸引力。在此，我们报道了一种新型层状硅酸锌（LZS）光催化剂，它是通过液相外延生长路线合成的，使用源自蛭石（一种层状硅酸盐粘土矿物）的二氧化硅作为晶格匹配的底物和硅源。LZS的外延生长在二维方向上受到限制，从而产生了蛭石型晶体结构和超薄纳米片形态，其厚度为8 - 15纳米，横向尺寸约为200纳米。实验观察和密度泛函理论计算表明，LZS在有机污染物降解和将CO还原为CO方面具有优异的能带排列。该材料在4-氯苯酚（4-CP）降解和将CO转化为CO方面表现出高效的光催化性能，是具有强光氧化和光还原能力的类粘土二维光催化剂的首个实例。
