生态环境学报2023，Vol.32Issue(11)：2019-2029,11.DOI:10.16258/j.cnki.1674-5906.2023.11.012
生物炭基光催化剂的制备及其降解废水中的有机污染物研究进展
Progress in the Preparation and Performance of Biochar-based Photocatalysts
摘要
Abstract
Biochar derived from biomass pyrolysis have been widely used in chemical,material,energy and environmental fields due to their developed pore structure,high specific surface area and easy electron transfer properties.At present,owing to the massive increase of organic pollutants in water bodies,the potential safety hazards to the human body and environment cannot be ignored.Therefore,it is important to use green and efficient photocatalysts for the treatment of organic pollutant wastewater.This paper reviews the latest research progress on biochar-based photocatalysts prepared by different synthetic methods for the disposal of various organic pollutants in wastewater.Firstly,different preparation methods of biochar carriers were compared and analyzed,revealing the characteristics of pyrolysis,hydrothermal carbonization,and baking,and providing ideas for the selection of the best preparation method of biochar.Biochar-based composites can effectively avoid the agglomeration phenomenon of nano-photocatalytic materials and promote the dispersion of photocatalysts on the surface of biochar.Therefore,this review also introduces the methods of preparing photocatalysts such as the sol-gel method,hydrolysis method,ultrasonic method,and thermal polycondensation,and describes the influencing mechanism of different preparation conditions for the activity of photocatalytic degradation of organic pollutants.On this basis,this article focuses on the application and effectiveness of biochar carriers and biochar-based composites for the removal of typical organic pollutants(methyl orange,gemifioxacin,rhodamine B,sulfamethoxazole,etc.)from wastewater,and summarizes the reaction mechanism into three steps:pollutant adsorption,photoexcited electron-hole and pollutant catalytic degradation.Meanwhile,biochar-based photocatalytic materials can increase the contact area with pollutants and enhance the mass transfer process of pollutants,thus significantly improving the catalytic activity of photocatalysts.Finally,the research highlights and offers prospects from the perspective of being green,clean and sustainable,and it is hoped that this review will guide future development of new biochar-based catalysts and research in photocatalysis.关键词
生物炭/光催化/生物质/有机污染物/光催化剂/反应机理Key words
biochar/photocatalysis/biomass/organic pollutants/photocatalysts/reaction mechanism分类
资源环境引用本文复制引用
赵丹丹,李文健,江丽霞,单锐,陈德珍,袁浩然,陈勇..生物炭基光催化剂的制备及其降解废水中的有机污染物研究进展[J].生态环境学报,2023,32(11):2019-2029,11.基金项目
广东省科技计划项目(2021A1515012263) （2021A1515012263）
山东省重点研发计划项目(2022CXGC010701) （2022CXGC010701）
广东省重点研发计划项目(2019B110209003) （2019B110209003）
