Photo-reduction enables catalyst regeneration in Fenton reaction on an Fe2O3-decorated TiO2 nanotube-based photocatalyst

doi:10.1039/d0dt00670j

	Photo-reduction enables catalyst regeneration in Fenton reaction on an Fe2O3-decorated TiO2 nanotube-based photocatalyst
	Peng, Quanming 1,2; Peng, Guiming 3; Wu, Liangpeng 1,2; Chen, Yaqian 1,2; Han, Bin 1,2; Su, Qiucheng 1,2; Liu, Shijun 1,2; Li, Xinjun 1,2
刊名	DALTON TRANSACTIONS
	2020-05-28
卷号	49 期号:20 页码:6730-6737
ISSN号	1477-9226
DOI	10.1039/d0dt00670j
通讯作者	Li, Xinjun(lixj@ms.giec.ac.cn)
英文摘要	The Fenton reaction is regarded as an advanced oxidation process that can efficiently remediate environmental pollutants. However, the one-time irreversible consumption of its catalysts raises the cost in practical application. Herein, we report the generation of active Fe2+ sites via photo-reduction by photogenerated electrons on a TiO2 nanotube-based catalyst (TNT(Pd)/Fe2O3) with Fe2O3 decorated on the outside wall, while the inside cavity entrapped Pd nanoparticles. Fenton catalytic investigations under visible light show that TNT(Pd)/Fe2O3 displays superior methyl orange degradation activity with 90% removal in 10 minutes. The kinetic constant is 4.3 times as the sum of the pure photocatalysis and Fenton catalytic kinetic constants. The synergistic effect between the Fenton and photocatalytic reactions is further evidenced by the photocurrent and photodegradation tests. The TNT(Pd)/Fe2O3 catalyst showed no decay in the Fenton-photocatalytic performance over three successive cycles. XPS measurements after long-term stability tests revealed no loss, but a slight increase in the number of Fe2+ species. All of these results suggest that the most active Fe2+ species in the Fenton reaction can be regenerated via the reduction by photogenerated electrons. This work addressed the challenge in catalyst regeneration in the traditional Fenton reaction via photoreduction by rational combination with a photocatalyst and the realized synergistic effect between photocatalysis and the Fenton reaction.
资助项目	Science and Technology Program of Guangzhou, China[201803030019] ; Natural Science Foundation of Guangdong Province[2018A030310134] ; Natural Science Foundation of Guangdong Province[2018A03031130212] ; National Natural Science Foundation of China[51802305] ; National Natural Science Foundation of China[51802043] ; Instrument and Equipment Function Development Project of the Chinese Academy of Sciences
WOS关键词	METAL-ORGANIC FRAMEWORK ; CARBON NANOTUBES ; DEGRADATION ; IRON ; NANOPARTICLES ; WATER ; OXIDATION ; ACID ; HYDRODECHLORINATION ; CONFINEMENT
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000537869500022
资助机构	Science and Technology Program of Guangzhou, China ; Natural Science Foundation of Guangdong Province ; National Natural Science Foundation of China ; Instrument and Equipment Function Development Project of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/27290]
专题	中国科学院广州能源研究所
通讯作者	Li, Xinjun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 2.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China 3.Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL 60637 USA
推荐引用方式 GB/T 7714	Peng, Quanming,Peng, Guiming,Wu, Liangpeng,et al. Photo-reduction enables catalyst regeneration in Fenton reaction on an Fe2O3-decorated TiO2 nanotube-based photocatalyst[J]. DALTON TRANSACTIONS,2020,49(20):6730-6737.
APA	Peng, Quanming.,Peng, Guiming.,Wu, Liangpeng.,Chen, Yaqian.,Han, Bin.,...&Li, Xinjun.(2020).Photo-reduction enables catalyst regeneration in Fenton reaction on an Fe2O3-decorated TiO2 nanotube-based photocatalyst.DALTON TRANSACTIONS,49(20),6730-6737.
MLA	Peng, Quanming,et al."Photo-reduction enables catalyst regeneration in Fenton reaction on an Fe2O3-decorated TiO2 nanotube-based photocatalyst".DALTON TRANSACTIONS 49.20(2020):6730-6737.