Yu Fang, Tian Fengyu, Zou Haowen, Ye Zihan, Peng Chuang, Huang Jinsheng, Zheng Yulin, Zhang Yue, Yang Yicheng, Wei Xiaoqian, Gao Bin
School of Resource and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
School of Resource and Environmental Sciences, Wuhan University, 299 Bayi Road, Wuhan 430072, China.
J Hazard Mater. 2021 Aug 5;415:125511. doi: 10.1016/j.jhazmat.2021.125511. Epub 2021 Mar 6.
There are challenges in developing multifunctional materials that can not only effectively adsorb but also completely eliminate organic contaminants in water. In this work, novel ZnO/biochar nanocomposites were synthesized using a facile ball-milling method. A series of characterization results showed that the ZnO nanoparticles dispersed uniformly on carbon surface within the biochar matrix. Ball milling increased the mesopores and macropores of the nanocomposites by breaking biochar and squeezing ZnO. The addition of appropriate amount of ZnO into biochar enhanced both the adsorption capacity and photocatalytic ability of the nanocomposites for methylene blue (MB) removal. When the initial concentration of MB was 160 mg/g, the nanocomposites exhibited high MB removal efficiency (up to 95.19%) under visible light through the combination of adsorption and photocatalysis. This work provides a feasible synthesis of metal oxide/biochar nanocomposites with excellent adsorption and photocatalysis properties for the treatment of organic dye wastewater.
开发既能有效吸附又能完全去除水中有机污染物的多功能材料存在挑战。在这项工作中，采用简便的球磨法合成了新型ZnO/生物炭纳米复合材料。一系列表征结果表明，ZnO纳米颗粒均匀分散在生物炭基质内的碳表面上。球磨通过破碎生物炭和挤压ZnO增加了纳米复合材料的中孔和大孔。向生物炭中添加适量的ZnO提高了纳米复合材料对亚甲基蓝（MB）去除的吸附容量和光催化能力。当MB的初始浓度为160mg/g时，纳米复合材料在可见光下通过吸附和光催化的结合表现出高的MB去除效率（高达95.19%）。这项工作为制备具有优异吸附和光催化性能的金属氧化物/生物炭纳米复合材料用于处理有机染料废水提供了一种可行的合成方法。
