标题：g-C3N4 Modified biochar as an adsorptive and photocatalytic material for decontamination of aqueous organic pollutants作者：Pi, Liu; Jiang, Rui; Zhou, Wangchi; Zhu, Hua; Xiao, Wei; Wang, Dihua;Mao, Xuhui

来源出版物：APPLIED SURFACE SCIENCE 卷：358 页：231-239 DOI：10.1016/j.apsusc.2015.08.176 A 出版年：DEC 15 2015

摘要：Converting the waste biomasses with high-carbon content into value-added materials is an environmental-friendly way for their utilization. In this study, a leaf-derived biochar is modified with graphitic C3N4 to fulfill an affordable composite material capable of removing organic pollutants via adsorptive and photocatalytic processes simultaneously. The preparation process includes a carbonization process of chestnut leaf biomass and a followed condensation reaction of melamine at 520 degrees C. The characterization shows that biochar and C3N4 existed in the composites in their pristine status, and the effective connection of C3N4 and biochar was established. The adsorptive performance of the composites is governed by the biochar content in the composite, thus showing favorable performance for the removal of cationic dye methylene blue (MB). The condensation reaction of the melamine precursor has a coalescing effect on the dispersed biochar, resulting in the growth of particle size of composite. The composites prepared at different biochar/melamine ratios all show a photocatalytic activity on decolorization of MB. In terms of the specific photocatalytic activity of C3N4 in the composite, biochar/melamine ratio of 0.5:1 is the best. Unlike the conventional adsorptive carbon materials which have saturated adsorption capacity, the composite in this study retain a sustaining decontamination capability due to the photocatalytic degradation of adsorbed organic pollutants under irradiation.

入藏号：WOS:000366220400028

文献类型：Article

语种：English

作者关键词：Biochar, C3N4, Adsorption, Photocatalysis, Decontamination

扩展关键词：VISIBLE-LIGHT IRRADIATION; GRAPHITIC CARBON NITRIDE; HEAVY-METAL IONS; COMPOSITE PHOTOCATALYSTS; LIGNOCELLULOSIC BIOMASS; METHYLENE-BLUE; FUELS; PHOTODEGRADATION; CHEMICALS; CHINA

通讯作者地址：Mao, Xuhui; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：626956077@qq.com; jumrychem@163.com; 931860337@qq.com; zhuhua333@126.com; gabrielxiao@whu.edu.cn; wangdh@whu.med.cn; clab@whu.edu.cn

地址：[Pi, Liu; Jiang, Rui; Zhou, Wangchi; Zhu, Hua; Xiao, Wei; Wang, Dihua; Mao, Xuhui]Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

研究方向：Chemistry; Materials Science; Physics

ISSN：0169-4332

eISSN:1873-5584

影响因子（2014）：2.711