PbS插层K4Nb6O17复合物的制备及其光催化制氢活性

doi:10.3724/SP.J.1077.2012.11682

无机材料学报 ›› 2012, Vol. 27 ›› Issue (9): 933-938.DOI: 10.3724/SP.J.1077.2012.11682

PbS插层K₄Nb₆O₁₇复合物的制备及其光催化制氢活性

崔文权, 刘艳飞, 胡金山, 刘利, 梁英华

(河北联合大学化工学院, 唐山 063009)

收稿日期:2011-11-01 修回日期:2011-12-20 出版日期:2012-09-20 网络出版日期:2012-08-28
作者简介:崔文权(1977-), 男, 副教授, 博士. E-mail: wkcui@163.com
基金资助:
国家自然科学基金(50972037, 51172063)

Synthesis of PbS Intercalated K₄Nb₆O₁₇ Composite and Its Photocatalytic Activity for Hydrogen Production

CUI Wen-Quan, LIU Yan-Fei, HU Jin-Shan, LIU Li, LIANG Ying-Hua

(Colloge of Chemical Engineering, Hebei United University, Tangshan 063009, China)

Received:2011-11-01 Revised:2011-12-20 Published:2012-09-20 Online:2012-08-28
About author:CUI Wen-Quan
Supported by:
National Natural Science Foundation of China (50972037, 51172063)

摘要/Abstract

摘要： 采用固相法合成层状半导体K₄Nb₆O₁₇, 通过层间离子交换反应、胺插入反应以及硫化反应制备了纳米PbS插层的K₄Nb₆O₁₇复合光催化剂(记作K₄Nb₆O₁₇/PbS). 利用X射线衍射(XRD), 场发射扫描电镜(SEM), X射线荧光光谱仪(XRF), 紫外-可见漫反射(UV-Vis)和分子荧光光谱(PL)等技术对其进行表征. 考察了催化剂在Na₂SO₃和Na₂S为牺牲剂的光催化制氢活性. 结果表明, PbS的插层拓展了K₄Nb₆O₁₇对可见光的响应, 催化制氢活性也有明显提高. 在紫外光和可见光下3 h产氢量分别达到123.94和0.66 mmol/(g cat). 最后讨论了插层复合催化剂光生电荷转移的机理.

关键词: 铌酸钾, 硫化铅, 插层, 光催化

Abstract: Thelayered compound K₄Nb₆O₁₇ was prepared via high temperature solid reaction, and PbS intercalated K₄Nb₆O₁₇ (designated as K₄Nb₆O₁₇/PbS) photocatalyst was synthesized via direct ion exchange, alkylamines intercalation and sulfurization procedures. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet-visible diffuse reflection spectra (UV-Vis) and photoluminescence measurement (PL), energy dispersive X-ray detector (EDS) and X-ray fluorescence spectrometer (XRF). The photocatalytic performance of these catalysts for hydrogen production was also investigated in the presence of Na₂S and Na₂SO₃ sacrificial reagents. The absorption edge of K₄Nb₆O₁₇ shifted to visible light region after the intercalation of PbS. K₄Nb₆O₁₇/PbS photocatalysts exhibit higher activities for photocatalytic hydrogen production under both UV light and visible light irradiation, and the amounts of hydrogen produced are 123.94 mmol/(g cat) and 0.66 mmol/(g cat) after 3 h irradiation, respectively. The mechanism of charge separation is also discussed.

Key words: potassium niobate, lead sulfide, intercalation, photocatalysis

中图分类号:

TB383

崔文权, 刘艳飞, 胡金山, 刘利, 梁英华. PbS插层K₄Nb₆O₁₇复合物的制备及其光催化制氢活性[J]. 无机材料学报, 2012, 27(9): 933-938.

CUI Wen-Quan, LIU Yan-Fei, HU Jin-Shan, LIU Li, LIANG Ying-Hua. Synthesis of PbS Intercalated K₄Nb₆O₁₇ Composite and Its Photocatalytic Activity for Hydrogen Production[J]. Journal of Inorganic Materials, 2012, 27(9): 933-938.

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PbS插层K₄Nb₆O₁₇复合物的制备及其光催化制氢活性

Synthesis of PbS Intercalated K₄Nb₆O₁₇ Composite and Its Photocatalytic Activity for Hydrogen Production

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