화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.117, 117-129, January, 2023
DOI10.1016/j.jiec.2022.09.044  Export Citation
Synergistic effect of adsorption and photocatalysis of BiOBr/lignin-biochar composites with oxygen vacancies under visible light irradiation
Qiang Yang1, 2, Xiang Li1, 3, Qingwen Tian1, 4, †, Aixiang Pan1, 3, Xingjian Liu1, 3, Hang Yin1, 3, Yingqiao Shi1, 3, and Guigan Fang1, 2, †
  • 1Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing, 210042, P. R. China
  • 2Nanjing Forestry University, Nanjing 210037, P. R. China
  • 3, China
  • 4Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, P. R. China
E-mail:,
Effective utilization solar energy through photocatalysis is an ideal way to solve environmental problems and achieve sustainable development. Herein, a novel BiOBr/Lignin-Biochar photocatalyst has been successfully synthesized by a simple hydrothermal method. The number of oxygen vacancies of BiOBr increased after C doping, which improves visible-light absorbance, reduces the recombination of photo-generated carriers and promotes O2 activation to produce ●O2-. UV–vis DRS result demonstrated that the visible-light absorption capacity of BiOBr improved significantly with the addition of lignin. Compared with BiOBr, the adsorption and photocatalytic ability of BiOBr/Lignin-Biochar composites were greatly enhanced due to enriched oxygen vacancies and the congenerous effect between BiOBr and lignin-biochar. The RhB removal with pure BiOBr and BiOBr/Lignin-Biochar under visible-light irradiation at 60 min was 54.5% and 99.2%, respectively, owing to the interface interaction between BiOBr and ligninbiochar promoted the separation between electron and holes and the enrichment of RhB around the photocatalysts. Notably, the bandgap of BiOBr/Lignin-Biochar composites decreased from 2.65 eV to 2.56 eV after C doping, useful for visible-light-driven photocatalysis. The superoxide radical anions (●O2-) were the main active species, as demonstrated by free radical capture experiments and ESR characterization results. Hence, the present work provides new insights into constructing cost-effective, high-efficiency composite materials for environmental remediation.
Keywords:BiOBr;Lignin-biochar;Adsorption and photocatalysis;Oxygen vacancies;RhB
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