He Rongan, Xu Difa, Cheng Bei, Yu Jiaguo, Ho Wingkei
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
Nanoscale Horiz. 2018 Sep 1;3(5):464-504. doi: 10.1039/c8nh00062j. Epub 2018 Jun 6.
Nanoscale Bi-based photocatalysts are promising candidates for visible-light-driven photocatalytic environmental remediation and energy conversion. However, the performance of bulk bismuthal semiconductors is unsatisfactory. Increasing efforts have been focused on enhancing the performance of this photocatalyst family. Many studies have reported on component adjustment, morphology control, heterojunction construction, and surface modification. Herein, recent topics in these fields, including doping, changing stoichiometry, solid solutions, ultrathin nanosheets, hierarchical and hollow architectures, conventional heterojunctions, direct Z-scheme junctions, and surface modification of conductive materials and semiconductors, are reviewed. The progress in the enhancement mechanism involving light absorption, band structure tailoring, and separation and utilization of excited carriers, is also introduced. The challenges and tendencies in the studies of nanoscale Bi-based photocatalysts are discussed and summarized.
纳米级铋基光催化剂是可见光驱动光催化环境修复和能量转换的有前途的候选材料。然而，块状铋基半导体的性能并不理想。人们越来越致力于提高这类光催化剂的性能。许多研究报道了成分调整、形貌控制、异质结构建和表面改性。本文综述了这些领域的最新研究课题，包括掺杂、改变化学计量比、固溶体、超薄纳米片、分级和中空结构、传统异质结、直接Z型结以及导电材料和半导体的表面改性。还介绍了在光吸收、能带结构调整以及激发载流子的分离和利用等增强机制方面的进展。讨论并总结了纳米级铋基光催化剂研究中的挑战和趋势。
