定向转化策略创制氮氧化物光催化剂

doi:10.19964/j.issn.1006-4990.2021-0743

Abstract

Abstract:

The efficient conversion and utilization of solar energy is an ideal way to solve the two major problems of energy and environment.Improving the photocatalytic activity of narrow bandgap oxynitrides is of significant importance as the means of realizing efficient visible-light-driven water splitting for solar energy.Among the various photocatalysts,oxynitrides have strong absorption in the visible region,which are considered to be potential photocatalytic materials in the visible region.Cur-rently,oxynitrides are mainly obtained by thermal nitridation,which mainly involves the continuous passage of ammonia gas through the oxides for more than 10 h under the condition of 1 173~1 373 K.The prepared oxynitrides only expose low-active crystal facets,and a large number of reduced defects can be used as the recombination center of photogenerated charges,which seriously restricts their wide application in the field of photocatalysis.In this case,a novel oriented transformation strat-egy to create high-quality oxynitrides was summarized.This strategy achieved effective control of oxynitrides defects and crys-tal facets by selecting oxide precursors containing volatile components,laying the foundation for its wide application in the field of solar photocatalysis.At the same time,this oriented transformation strategy could be extended to other material sys-tems,providing new ideas for the development of high-efficiency photocatalysis.

Key words: oriented transformation, narrow-band semiconductors, oxynitrides, photocatalytic water splitting

CLC Number:

O643.32

WANG Xin,XUE Dongfeng. Preparation of oxynitrides photocatalysts by the oriented transformation strategy[J]. Inorganic Chemicals Industry, 2022, 54(3): 1-6.

Figures/Tables 3

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References 22

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Preparation of oxynitrides photocatalysts by the oriented transformation strategy

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