Actualizing efficient photocatalytic water oxidation over SrTaO2N by Na modification

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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
发表期刊	ROYAL SOC CHEMISTRY
ISSN	2044-4753
卷号	7 期号:20 页码:4640-4647
摘要	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.; 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.
部门归属	[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
学科领域	Chemistry, Physical
资助者	National 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
收录类别	SCI
语种	英语
WOS记录号	WOS:000413192900009
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79035
专题	中国科学院金属研究所
通讯作者	Xu, XX (reprint author), Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Sustainabil, 1239 Siping Rd, Shanghai 200092, Peoples R China.
推荐引用方式 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.