School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, PR China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China.
School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou, 510006, PR China.
Chemosphere. 2022 Jun;297:134152. doi: 10.1016/j.chemosphere.2022.134152. Epub 2022 Mar 1.
Biochar (C) applied in synthesizing photocatalysts to eliminate water pollution has been intensively investigated. Herein we report the first use of biochar pyrolyzed from food wastes at 400 C (400C) and 700 C to construct C/BiOBr composites via a facile hydrolysis approach. Photocatalytic performances could be significantly improved by choosing the appropriate carbonization temperature and adjusting the content of C in C/BiOBr composites. The prepared 1%400C/BiOBr exhibited the best photodegradation capacity towards methylene orange (20 mg/L) and tetracycline (50 mg/L). A series of characterization results illustrated that smooth structure and surface properties (oxygen functional groups and persistent free radicals) of 400C played an important role in enhancing the photocatalytic activities. Mechanism exploration suggested that h and ˙O were the main active species thus contributing to photodegradation. This study provided a new insight into utilization of biochar derived from food wastes in photocatalysis and environmental remediation.
生物炭（C）在合成光催化剂以消除水污染方面的应用受到了广泛关注。本文首次报道了采用 400°C 和 700°C 热解食品废弃物制备的生物炭，通过简便的水解法制备 C/BiOBr 复合材料。通过选择合适的碳化温度和调整 C/BiOBr 复合材料中 C 的含量，可以显著提高光催化性能。制备的 1%400C/BiOBr 对亚甲基蓝（20mg/L）和四环素（50mg/L）表现出最好的光降解能力。一系列的表征结果表明，400°C 具有光滑的结构和表面性质（含氧官能团和持久自由基），对提高光催化活性起着重要作用。机理探讨表明，h 和 ˙O 是主要的活性物质，从而促进了光降解。本研究为利用源自食品废物的生物炭在光催化和环境修复中的应用提供了新的见解。
