熔盐法制备立方块状钛酸锶及其表面铜离子团簇修饰

doi:10.3724/SP.J.1077.2013.13048

无机材料学报 ›› 2013, Vol. 28 ›› Issue (10): 1103-1107.DOI: 10.3724/SP.J.1077.2013.13048 CSTR: 32189.14.SP.J.1077.2013.13048

熔盐法制备立方块状钛酸锶及其表面铜离子团簇修饰

龙震¹, 魏贤华¹, 邱晓清²

(1. 西南科技大学四川省非金属复合与功能材料重点实验室, 绵阳621010; 2 福州大学国家光催化工程技术研究中心, 福州350002)

收稿日期:2013-01-21 修回日期:2013-03-07 出版日期:2013-10-20 网络出版日期:2013-09-18
作者简介:龙震(1975-), 男, 讲师. E-mail: longzhen75@aliyun.com
基金资助:
西南科技大学博士基金(11zx7152)

Preparation of SrTiO3 Cubes by Molten Salt Method and Its Surface Ions Modification with Cu(II) Clusters

LONG Zhen¹, WEI Xian-Hua¹, QIU Xiao-Qing²

(1. State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, China; 2. State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China)

Received:2013-01-21 Revised:2013-03-07 Published:2013-10-20 Online:2013-09-18
About author:LONG Zhen. E-mail: longzhen75@aliyun.com
Supported by:
Doctor Research Foundation of Southwest University of Science and Technology(11zx7152)

摘要/Abstract

摘要： 采用熔盐法制备了钙钛矿结构的钛酸锶立方块。通过浸渍法对所得钛酸锶进行表面离子修饰, 得到表面负载无定形Cu(II)纳米团簇的新型可见光催化剂。利用ICP-AES、XRD、SEM、XPS、DRS等对其进行表征。通过光催化降解气相异丙醇对其可见光催化活性进行评价。研究发现, 负载无定形Cu(II)团簇后, 所得的催化剂Cu(II)-SrTiO3具有较好的可见光催化降解气相异丙醇的性能, 能够有效地将异丙醇彻底矿化成二氧化碳。

关键词: 钛酸锶, 光催化, 熔盐法, 离子修饰

Abstract: Pure SrTiO₃ cubes with perovskite structure were prepared by a molten salt method. The novel visible light active photocatalysts were obtained as a result of surface modification of SrTiO₃ cubes with Cu ions by an impregnation technique. The as-prepared samples were characterized by an inductively coupled plasma atomic emission spectrometer, X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscope (XPS), and UV-Vis diffuse reflectance spectroscope (DRS). The decomposition of gaseous 2-propanol was chosen as a probe to evaluate the photocatalytic activities of the samples in air. The results show that the visible light photocatalytic activities of the samples can be significantly enhanced by grafting amorphous Cu(II) clusters on the surfaces of SrTiO₃. Under visible light irradiation, electrons in the valance band of SrTiO₃ are transferred to the surfaced Cu(II) clusters, leaving holes with strong oxidizing power in the valance band and producing Cu(I) clusters. The Cu(I) clusters can efficiently reduction oxygen molecules via a multi-electron reduction process to consume the excited electrons. On the other hand, the generated holes can decompose the organic compounds. As a result, the complete decomposition of gaseous 2-propanol into CO₂ can be achieved over the Cu(II)-SrTiO₃ under visible light irradiation.

Key words: SrTiO₃, photocatalysis, molten salt method, surface modification

中图分类号:

O643

龙震, 魏贤华, 邱晓清. 熔盐法制备立方块状钛酸锶及其表面铜离子团簇修饰[J]. 无机材料学报, 2013, 28(10): 1103-1107.

LONG Zhen, WEI Xian-Hua, QIU Xiao-Qing. Preparation of SrTiO3 Cubes by Molten Salt Method and Its Surface Ions Modification with Cu(II) Clusters[J]. Journal of Inorganic Materials, 2013, 28(10): 1103-1107.

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熔盐法制备立方块状钛酸锶及其表面铜离子团簇修饰

Preparation of SrTiO3 Cubes by Molten Salt Method and Its Surface Ions Modification with Cu(II) Clusters

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