Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst

doi:10.1016/j.cattod.2022.03.009

	Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst
	Li, Cuixia1,2 ; Sun, Huizhen 1; Jin, Haize 1,2; Li, Wenshen 1,2; Liu, Jingbo Louise 3,4; Bashir, Sajid 3
	2022-09-01
发表期刊	Catalysis Today
ISSN	0920-5861
卷号	400-401 页码:146-158
摘要	Water remediation using semiconductor photocatalysts under visible light (VL) irradiance appears as a more sustainable technology option due to the greater penetration depth. Consequently, the overall band spectrum of VL has received significant attention to providing solutions to secure clean water resources over the past few decades. This research developed an innovative approach to enhancing the visible light susceptibility of semiconductor-based photocatalytic composites Ag10Si4O13/TiO2 (ASO/TO). The intrinsic properties of TO and electron donor ability of ASO lend synergistically to the generation of a narrow bandgap semiconductor. A feasible wet-chemistry method was found to engineer the electronic properties of ASO/TO under VL for rapid decolorization of methylene blue (MB). Inhibition experiments with several agents confirmed that the decolorization proceeds through the generation of hydroxyl radical species assisted by hole carrier generation at the ASO junction. The rate of MB decomposition followed a pseudo-first-order kinetic profile (98.2% within 35 mins under ambient conditions with 5 ppm of 2:1 ASO/TO and 20 ppm of MB). The XRD/XPS spectroscopic analysis confirms the electronic polarization of distorted SiO4 tetrahedral units coordinated to Ag-O, forming a double dumbbell double-helical structure. The staggered bandgap of these composite photocatalysts is associated with the Ag-Ag d10/sp hybridization and dispersive conduction band. At the same time, the 2p orbitals of TiO2 showed a less dispersive band due to the availability of D-orbitals. The generated Ag10Si4O13 (ASO) based ferroelectric materials allow amplifying its frequency due to internal polarization along the c-axis. The electrochemical evaluation also showed that the interface charge transfer resistance was lowered relative to TiO2, facilitating the efficacy of photocatalytic reactivity, where the generation of holes as charge carriers was the rate-limiting step. The novel nano-engineering strategy providing highly active photocatalysis can open new horizons for VL applications. © 2022 Elsevier B.V.
关键词	Charge transfer Electronic properties Energy gap Ferroelectricity Heterojunctions Light Photocatalytic activity Polarization Semiconductor materials Silicon Silicon compounds Spectroscopic analysis Titanium dioxide Water pollution Water resources Ag10si4O13/TiO2 heterojunction Decolourization Efficient decomposition Methylene Blue Performance Semiconductor photocatalyst TiO 2 Type II Visible light Water remediation
DOI	10.1016/j.cattod.2022.03.009
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Chemistry ; Engineering
WOS类目	Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS记录号	WOS:000860704900005
出版者	Elsevier B.V.
EI入藏号	20221211817267
EI主题词	Aromatic compounds
EI分类号	444 Water Resources ; 453 Water Pollution ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 701.1 Electricity: Basic Concepts and Phenomena ; 712.1 Semiconducting Materials ; 714.2 Semiconductor Devices and Integrated Circuits ; 741.1 Light/Optics ; 801 Chemistry ; 801.4 Physical Chemistry ; 802.2 Chemical Reactions ; 804.1 Organic Compounds ; 804.2 Inorganic Compounds
来源库	WOS
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/159144
专题	材料科学与工程学院
通讯作者	Jin, Haize
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, 287 Langongping Rd, Lanzhou, Gansu, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou, Gansu, Peoples R China; 3.Texas A&M Univ, Dept Chem, MSC 161,700 Univ Blvd, Kingsville, TX 78363 USA; 4.Texas A&M Energy Inst, Frederick E Giesecke Engn Res Bldg,3372 TAMU, College Stn, TX 77843 USA
第一作者单位	材料科学与工程学院; 省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	材料科学与工程学院; 省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Li, Cuixia,Sun, Huizhen,Jin, Haize,et al. Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst[J]. Catalysis Today,2022,400-401:146-158.
APA	Li, Cuixia,Sun, Huizhen,Jin, Haize,Li, Wenshen,Liu, Jingbo Louise,&Bashir, Sajid.(2022).Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst.Catalysis Today,400-401,146-158.
MLA	Li, Cuixia,et al."Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst".Catalysis Today 400-401(2022):146-158.