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Structural dependence of photocatalytic hydrogen production over La/Cr co-doped perovskite compound ATiO(3) (A = Ca, Sr and Ba)
Lu, Lingwei; Ni, Shuang; Liu, Gang; Xu, Xiaoxiang; Xu, XX (reprint author), Tongji Univ, Shanghai Key Lab Chem Assessment & Sustainabil, Sch Chem Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China.
2017-09-14
Source PublicationPERGAMON-ELSEVIER SCIENCE LTD
ISSN0360-3199
Volume42Issue:37Pages:23539-23547
AbstractThe crystal structure of a photocatalyst generally plays a pivotal role in its electronic structure and catalytic properties. In this work, we synthesized a series of La/Cr co-doped perovskite compounds ATiO(3) (M = Ca, Sr and Ba) via a hydrothermal method. Their optical properties and photocatalytic activities were systematically explored from the viewpoint of their dependence on structural variations, i.e. impact of bond length and bond angles. Our results show that although La/Cr co-doping helps to improve the visible light absorption and photocatalytic activity of these wide band gap semiconductors, their light absorbance and catalytic performance are strongly governed by the Ti-O bond length and Ti-O-Ti bond angle. A long Ti-O bond and deviation of Ti-O-Ti bond angle away from 180 deteriorate the visible light absorption and photocatalytic activity. The best photocatalytic activity belongs to Sr(0.9)La(0.1)Ti(0.9)Cr(0.1)O3 with an average hydrogen production rate similar to 2.88 mu mol/h under visible light illumination (lambda >= 400 nm), corresponding to apparent quantum efficiency similar to 0.07%. This study highlights an effective way in tailoring the light absorption and photocatalytic properties of perovskite compounds by modifying cations in the A site. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.; The crystal structure of a photocatalyst generally plays a pivotal role in its electronic structure and catalytic properties. In this work, we synthesized a series of La/Cr co-doped perovskite compounds ATiO(3) (M = Ca, Sr and Ba) via a hydrothermal method. Their optical properties and photocatalytic activities were systematically explored from the viewpoint of their dependence on structural variations, i.e. impact of bond length and bond angles. Our results show that although La/Cr co-doping helps to improve the visible light absorption and photocatalytic activity of these wide band gap semiconductors, their light absorbance and catalytic performance are strongly governed by the Ti-O bond length and Ti-O-Ti bond angle. A long Ti-O bond and deviation of Ti-O-Ti bond angle away from 180 deteriorate the visible light absorption and photocatalytic activity. The best photocatalytic activity belongs to Sr(0.9)La(0.1)Ti(0.9)Cr(0.1)O3 with an average hydrogen production rate similar to 2.88 mu mol/h under visible light illumination (lambda >= 400 nm), corresponding to apparent quantum efficiency similar to 0.07%. This study highlights an effective way in tailoring the light absorption and photocatalytic properties of perovskite compounds by modifying cations in the A site. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
description.department[lu, lingwei ; xu, xiaoxiang] tongji univ, shanghai key lab chem assessment & sustainabil, sch chem sci & engn, 1239 siping rd, shanghai 200092, peoples r china ; [ni, shuang] china acad engn phys, laser fus res ctr, sci & technol plasma phys lab, mianyang 621900, peoples r china ; [liu, gang] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
KeywordPerovskite Doping Photocatalyst Water Splitting
Subject AreaChemistry, Physical ; Electrochemistry ; Energy & Fuels
Funding OrganizationNational Natural Science Foundation of China [21401142]; Shanghai Science and Technology Commission [14DZ2261100]; Fundamental Research Funds for the Central Universities
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79098
Collection中国科学院金属研究所
Corresponding AuthorXu, XX (reprint author), Tongji Univ, Shanghai Key Lab Chem Assessment & Sustainabil, Sch Chem Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China.
Recommended Citation
GB/T 7714
Lu, Lingwei,Ni, Shuang,Liu, Gang,et al. Structural dependence of photocatalytic hydrogen production over La/Cr co-doped perovskite compound ATiO(3) (A = Ca, Sr and Ba)[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,42(37):23539-23547.
APA Lu, Lingwei,Ni, Shuang,Liu, Gang,Xu, Xiaoxiang,&Xu, XX .(2017).Structural dependence of photocatalytic hydrogen production over La/Cr co-doped perovskite compound ATiO(3) (A = Ca, Sr and Ba).PERGAMON-ELSEVIER SCIENCE LTD,42(37),23539-23547.
MLA Lu, Lingwei,et al."Structural dependence of photocatalytic hydrogen production over La/Cr co-doped perovskite compound ATiO(3) (A = Ca, Sr and Ba)".PERGAMON-ELSEVIER SCIENCE LTD 42.37(2017):23539-23547.
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