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Actualizing efficient photocatalytic water oxidation over SrTaO2N by Na modification
Wu, Fangfang; Sun, Xiaoqin; Liu, Gang; Xu, Xiaoxiang; Xu, XX (reprint author), Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
2017-10-21
Source PublicationROYAL SOC CHEMISTRY
ISSN2044-4753
Volume7Issue:20Pages:4640-4647
AbstractDespite a strong visible light absorption at a wavelength as far as 610 nm, SrTaO2N generally exhibits poor photocatalytic activity due to photocatalytic self-decomposition. In this study, we introduce Na into the B site of SrTaO2N and perform an investigation on its crystal structure, optical absorption and photocatalytic water oxidation in response to Na incorporation. Our results suggest that Na incorporation effectively enhances local Ta-O(N) bond strength, which is responsible for strong interband light absorption, low tendency to defect formation and high stability against photocatalytic self-decomposition. Efficient photocatalytic water oxidation was realized in Na-modified SrTaO2N (Sr0.8Na0.2TaO2.8N0.2) with an apparent quantum efficiency as high as 0.2% under visible light illumination (>= 400 nm). This simple strategy highlights the benefits of alkaline metal modification and can be extended to other nitrides or oxynitrides where management of local bond strength is needed.; Despite a strong visible light absorption at a wavelength as far as 610 nm, SrTaO2N generally exhibits poor photocatalytic activity due to photocatalytic self-decomposition. In this study, we introduce Na into the B site of SrTaO2N and perform an investigation on its crystal structure, optical absorption and photocatalytic water oxidation in response to Na incorporation. Our results suggest that Na incorporation effectively enhances local Ta-O(N) bond strength, which is responsible for strong interband light absorption, low tendency to defect formation and high stability against photocatalytic self-decomposition. Efficient photocatalytic water oxidation was realized in Na-modified SrTaO2N (Sr0.8Na0.2TaO2.8N0.2) with an apparent quantum efficiency as high as 0.2% under visible light illumination (>= 400 nm). This simple strategy highlights the benefits of alkaline metal modification and can be extended to other nitrides or oxynitrides where management of local bond strength is needed.
description.department[wu, fangfang ; sun, xiaoqin ; xu, xiaoxiang] tongji univ, sch chem sci & engn, shanghai key lab chem assessment & sustainabil, 1239 siping rd, shanghai 200092, peoples r china ; [liu, gang] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china
Subject AreaChemistry, Physical
Funding OrganizationNational Natural Science Foundation of China [21401142]; Recruitment Program of Global Youth Experts (1000 plan); Shanghai Science and Technology Commission [14DZ2261100]; Fundamental Research Funds for the Central Universities
Indexed BySCI
Language英语
WOS IDWOS:000413192900009
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79035
Collection中国科学院金属研究所
Corresponding AuthorXu, XX (reprint author), Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
Recommended Citation
GB/T 7714
Wu, Fangfang,Sun, Xiaoqin,Liu, Gang,et al. Actualizing efficient photocatalytic water oxidation over SrTaO2N by Na modification[J]. ROYAL SOC CHEMISTRY,2017,7(20):4640-4647.
APA Wu, Fangfang,Sun, Xiaoqin,Liu, Gang,Xu, Xiaoxiang,&Xu, XX .(2017).Actualizing efficient photocatalytic water oxidation over SrTaO2N by Na modification.ROYAL SOC CHEMISTRY,7(20),4640-4647.
MLA Wu, Fangfang,et al."Actualizing efficient photocatalytic water oxidation over SrTaO2N by Na modification".ROYAL SOC CHEMISTRY 7.20(2017):4640-4647.
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