Fan Yingying, Bao Yu, Song Zhongqian, Sun Zhonghui, Wang Dandan, Han Dongxue, Niu Li
Center for Advanced Research on Analytical Science, School of Chemistry and Chemical Engineering, Guangzhou University Guangzhou 510006 P. R. China
State Key Laboratory of Electroanalytical Chemistry, c/o Engineering Laboratory for Modern Analytical Techniques, Changchun Institute of Applied Chemistry, Chinese Academy of Science Changchun 130022 Jilin China
RSC Adv. 2018 Jul 10;8(44):24812-24818. doi: 10.1039/c8ra04180f. eCollection 2018 Jul 9.
Broad spectrum absorption of semiconductor photocatalysts is an essential requirement to achieve the best values of solar energy utilization. Here, through precise surface state adjustment, coaxial tri-cubic Ag/AgCl materials with distinct apparent colours (blue and fuchsia) were successfully fabricated. The reasons for the different colour generation of the Ag/AgCl materials were investigated by performing corresponding spectrum analysis. It was revealed that Ag/AgCl-blue and Ag/AgCl-fuchsia crystals could efficiently boost the photon energy harvesting, spanning from the UV to near-infrared spectral region (250-800 nm), and achieved 2.6 and 5.4 times the wastewater degradation efficiency of AgCl-white. Simultaneously, these two fresh coloured candidates were demonstrated to have preferable photocatalytic CO photoreduction capability, with yields of ∼3.6 (Ag/AgCl-fuchsia) and 2.6 (Ag/AgCl-blue) times that of AgCl-white. It is expected that this work will provide a beneficial perspective for understanding the solar absorption feature at both the major structure modulation and particular surface state regulation level.
半导体光催化剂的广谱吸收是实现太阳能利用最佳值的基本要求。在此，通过精确的表面态调控，成功制备出具有不同表观颜色（蓝色和紫红色）的同轴三立方Ag/AgCl材料。通过进行相应的光谱分析，研究了Ag/AgCl材料产生不同颜色的原因。结果表明，Ag/AgCl-蓝色和Ag/AgCl-紫红色晶体能够有效提高光子能量收集效率，覆盖紫外到近红外光谱区域（250-800nm），其废水降解效率分别是AgCl-白色的2.6倍和5.4倍。同时，这两种新颜色的材料还具有较好的光催化CO光还原能力，产率分别约为AgCl-白色的3.6倍（Ag/AgCl-紫红色）和2.6倍（Ag/AgCl-蓝色）。预计这项工作将为在主要结构调制和特定表面态调控水平上理解太阳能吸收特性提供有益的视角。
