Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin, 150080, China.
Environ Sci Pollut Res Int. 2019 Oct;26(30):31055-31061. doi: 10.1007/s11356-019-06267-8. Epub 2019 Aug 27.
Semiconductors are promising photocatalysts for the use of sunlight in energy conversion and environmental remediation. To this end, various synthetic pathways have been proposed to increase their photocatalytic efficiency, catalytic stability, recycle, and reuse. In this work, mixed phase CdS nanoparticles were loaded on the surface of activated biomass carbons to prepare composite photocatalysts via hydrothermal syntheses, which were further applied to photocatalytic degradation of rhodamine B (RhB) under visible irradiation. The composite photocatalysts displayed considerable specific surface area (up to 672 m g) and suitable band gap energy of ca. 2.1 eV. Due to the excellent light adsorption ability and chemical stability, these composite photocatalysts exhibited excellent photocatalytic capacity toward RhB degradation under visible irradiation. Moreover, the photocatalytic stability was also demonstrated by cyclic experiments, by which the composite photocatalysts retained over 80% of the initial catalytic activity after 4 consecutive runs.
半导体是一种很有前途的光催化剂，可用于利用阳光进行能量转换和环境修复。为此，人们提出了各种合成途径来提高其光催化效率、催化稳定性、可回收性和再利用性。在这项工作中，通过水热合成法将混合相的硫化镉纳米粒子负载在活性生物质炭的表面上，制备了复合光催化剂，并进一步将其应用于可见光照射下罗丹明 B（RhB）的光催化降解。该复合光催化剂具有相当大的比表面积（高达 672 m g）和适宜的带隙能约为 2.1 eV。由于具有优异的光吸收能力和化学稳定性，这些复合光催化剂在可见光照射下对 RhB 降解表现出优异的光催化能力。此外，通过循环实验还证明了光催化稳定性，其中复合光催化剂在 4 次连续运行后仍保持初始催化活性的 80%以上。
