Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes   Used for Simultaneous Removal of As(III) and As(V)

doi:10.1021/acsami.5b05263

CORC > 北京大学 > 环境科学与工程学院

	Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes Used for Simultaneous Removal of As(III) and As(V)
	Liu, Wen ; Zhao, Xiao ; Borthwick, Alistair G. L. ; Wang, Yanqi ; Ni, Jinren
刊名	ACS APPLIED MATERIALS & INTERFACES
	2015
关键词	titanate nanotubes Fe-deposited photocatalytic activity dual-enhanced visible light As CALCINATION TEMPERATURE HYDROTHERMAL METHOD THERMAL-TREATMENT ARSENIC TOXICITY ADSORPTION OXIDATION TIO2 MICROSTRUCTURES NANOSTRUCTURES ADSORBENT
DOI	10.1021/acsami.5b05263
英文摘要	Fe-deposited titanate nanotubes (Fe-TNTs) with high photocatalytic activity and adsorptive performance were synthesized through a one-step hydrothermal method. Initial As(III) oxidation followed by As(V) adsorption by Fe-TNTs could simultaneously remove these two toxic pollutants from aqueous solutions. The apparent rate constant value for photo-oxidation of As(III) under UV irradiation by Fe-TNTs was almost 250 times that of unmoidified TNTs. Under visible light, the Fe-TNTs also exhibited enhanced photocatalytic activity after Fe was deposited. Fe' located in the interlayers of TNTs acted as temporary electron- or hole-trapping sites, and attached alpha-Fe2O3 played the role of a charge carrier for electrons transferred from TNTs. These two effects inhibited electron hole pair recombination thus promoting photocatalysis. Moreover, the As(V) adsorptive performance of Fe-TNTs also improved, owing to the presence of additional adsorption sites, a-Fe2O3, as well as increased pHpzo Furthermore, Fe-TNTs exhibited good photocatalytic and adsorptive performace even after 5 reuse cycles. The present tests, concerning an initial As(III) photocatalysis and subsequent As(V) adsorption process, highlight the feasibility and importance of Fe used to modify TNTs. This study proposes a feasible method to simultaneously remove As(III) and As(V) from contaminated water using a novel Ti-based nanomaterial.; National Natural Science Foundation of China [51379010]; U.S. Department of the Interior Bureau of Ocean Energy Management [M12AC00013]; Collaborative Innovation Center for Regional Environmental Quality of China; SCI(E); EI; PubMed; ARTICLE; nijinren@iee.pku.edu.cn; 35; 19726-19735; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416335]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Liu, Wen,Zhao, Xiao,Borthwick, Alistair G. L.,et al. Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes Used for Simultaneous Removal of As(III) and As(V)[J]. ACS APPLIED MATERIALS & INTERFACES,2015.
APA	Liu, Wen,Zhao, Xiao,Borthwick, Alistair G. L.,Wang, Yanqi,&Ni, Jinren.(2015).Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes Used for Simultaneous Removal of As(III) and As(V).ACS APPLIED MATERIALS & INTERFACES.
MLA	Liu, Wen,et al."Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes Used for Simultaneous Removal of As(III) and As(V)".ACS APPLIED MATERIALS & INTERFACES (2015).