文献类型：期刊文献

英文题名：Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

作者：Lu, Yin[1];Cai, Yawen[2];Zhang, Sai[3];Zhuang, Li[2];Hu, Baowei[2];Wang, Suhua[4];Chen, Jianrong[5];Wang, Xiangke[2,3]

机构：[1]Zhejiang Shuren Univ, Key Lab Pollut Exposure & Hlth Intervent Zhejiang, Coll Biol & Environm Engn, Hangzhou 310015, Peoples R China;[2]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China;[3]North China Elect Power Univ, Coll Environm Sci & Technol, Beijing 102206, Peoples R China;[4]Guangdong Univ Petrochem Technol, Sch Environm Sci & Engn, Maoming 525000, Peoples R China;[5]Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Zhejiang, Peoples R China

年份：2022

卷号：4

期号：1

外文期刊名：BIOCHAR

收录：SCI-EXPANDED(收录号：WOS:000829964000001)、、Scopus(收录号：2-s2.0-85134732018)、WOS

基金：This work was supported by National Key Research and Development Program of China (2017YFA0207002), the National Natural Science Foundation of China (U2067215), the Key Research and Development Plan of Zhejiang Province (2021C03176) and Beijing Outstanding Young Scientist Program.

语种：英文

外文关键词：Biochar-based composites; Adsorption; Photocatalytic degradation; Photocatalytic reduction; Environmental pollutants

外文摘要：The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e(-)-h(+) pairs, to produce more superoxide radicals (center dot O-2(-)) and hydroxyl radicals (center dot OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Highlights 1. Adsorption-photocatalytic degradation of organic pollutants by biochar-based catalysts is summarized. 2. Adsorption-(photo)catalytic reduction-solidification of heavy metal ions is discussed. 3. Mechanism and active free radicals on the degradation/reduction of contaminants are compared and described. 4. The methods to improve the photocatalysis performance of biochar-based catalysts are introduced. 5. The challenges for the real application of biochar-based materials are provided.