Sewage sludge-derived TiO2/Fe/Fe3C-biochar composite as an efficient heterogeneous catalyst for degradation of methylene blue

doi:10.1016/j.chemosphere.2018.10.027

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Sewage sludge-derived TiO2/Fe/Fe3C-biochar composite as an efficient heterogeneous catalyst for degradation of methylene blue
	Mian, Md Manik 1,2; Liu, Guijian 1,2
刊名	CHEMOSPHERE
	2019
卷号	215 页码:101-114
关键词	TiO2/Fe/Fe3C-Biochar Sewage sludge-derived catalyst Heterogeneous catalyst Catalytic degradation Methylene blue
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2018.10.027
通讯作者	Liu, Guijian(lgj@ustc.edu.cn)
英文摘要	Novel TiO2/Fe/Fe3C-biochar composite, as a heterogeneous catalyst, has been synthesized by a single-step route, where sewage sludge (SS) and different ratios of nanoparticles (NPs: Fe and Ti) impregnated with chitosan using coagulation and flocculation techniques for subsequent thermal decomposition at 800 degrees C. The physiochemical properties of samples have been characterized thoroughly and employed in methylene blue (MB) degradation tests. It was found that NPs ratio and chitosan support have significant influences on the properties and catalytic activity of catalysts. Chitosan inclusion successfully improves the surface area and mesoporosity of composites, while high contents of Fe integration reduce surface area and active site (Fe3C) due to Fe-0 agglomeration. Though, Ti incorporation produces Ti3+ that activated photosensitivity. Catalyst with the high mesoporous surface, Ti3+ , selective Fe3C, and small Fe-0 shows superior MB removal competency through concurrent adsorption, photodegradation, and H2O2 activation. Primarily center dot OH and some O-2(center dot-) radicles participating in the degradation reactions evident from scavenging experiments. The maximum MB removal capacity evaluated as 376.9 mg L-1 in neutral pH. Moreover, the catalyst exhibits excellent material stability, recyclability, easy separability, and low Fe-ion leaching (0.11 mg L-1 ) after catalysis. This study provided new insight into a low-cost and environmentally friendly route of catalyst synthesis using SS, NPs, and chitosan, which concurrently advantageous to SS disposal and wastewater treatment. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[41672144] ; National Natural Science Foundation of China[41402133] ; Key Program for Science and Technology Development of Anhui Province[1804b06020358]
WOS关键词	OXYGEN REDUCTION REACTION ; PYROLYSIS TEMPERATURE ; CARBON NANOSHEETS ; AQUEOUS-SOLUTIONS ; FACILE SYNTHESIS ; CO-PYROLYSIS ; WASTE-WATER ; BIOCHAR ; PERFORMANCE ; OXIDATION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000450383400013
资助机构	National Natural Science Foundation of China ; Key Program for Science and Technology Development of Anhui Province
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/14555]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Liu, Guijian
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Mian, Md Manik,Liu, Guijian. Sewage sludge-derived TiO2/Fe/Fe3C-biochar composite as an efficient heterogeneous catalyst for degradation of methylene blue[J]. CHEMOSPHERE,2019,215:101-114.
APA	Mian, Md Manik,&Liu, Guijian.(2019).Sewage sludge-derived TiO2/Fe/Fe3C-biochar composite as an efficient heterogeneous catalyst for degradation of methylene blue.CHEMOSPHERE,215,101-114.
MLA	Mian, Md Manik,et al."Sewage sludge-derived TiO2/Fe/Fe3C-biochar composite as an efficient heterogeneous catalyst for degradation of methylene blue".CHEMOSPHERE 215(2019):101-114.