期刊
APPLIED ORGANOMETALLIC CHEMISTRY
卷 34, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/aoc.6001
关键词
biochar; composite; diclofenac; spent coffee grounds; TiO2
资金
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior [88882.427594/2019-01, 88887.195036/2018-00]
A novel composite, biochar derived from spent coffee grounds with immobilized TiO2(biochar-TiO2) was prepared, characterized, and applied as an alternative, effective, and sustainable photocatalyst for degrading diclofenac from aqueous solution. Composites with different mass ratios between TiO(2)and biochar were prepared by mechanical mixing and subsequent pyrolysis in an inert atmosphere of N(2)at 650 degrees C. The sample with biochar-TiO(2)ratio of 1:1 presented a degradation efficiency of 90% at just 120 min versus 40% for TiO(2)used as reference. This fact is associated with a set of intrinsic characteristics obtained during the formation of the composite, such as superior pore size, avoiding the recombination of thee/h(+)pair, bandgap reduction, and promotion of reactive oxygen species due to phenolic groups present on the biochar surface. The dominant reactive species involved during the photocatalytic degradation of diclofenac wereh(+)and(center dot)OH. The diclofenac degradation pathways were determined based on the identification of intermediates and nonpurgeable organic carbon (NPOC) analysis. The novel biochar-TiO(2)composite prepared in this work showed high physical-chemical stability and efficiency over five consecutive cycles of reuse, proving to be a highly promising photocatalyst for degrading diclofenac in water.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据