Ni_xCo_(3-x)O_4修饰CdSe/TiO_2纳米管阵列对水光电氧化活性的影响

IF 0.8 4区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

无机化学学报 Pub Date : 2013-03-10 DOI:10.3969/J.ISSN.1001-4861.2013.00.051

Xu Zhen, Li Juan, Li Xinjun

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引用次数: 0

摘要

采用氨蒸发诱导生长的方法，用NixCo3-x,O-4对CdSe/TiO2纳米管阵列(TiO(2)NTA)薄膜进行了修饰。采用x射线衍射、场发射扫描电镜、能量色散谱、x射线光电子能谱和UV-Vis漫反射能谱对薄膜进行了表征。为了表征水的光电氧化过程中光阳极的活性，在模拟太阳照射下，在三电极系统中进行了切碎线性扫描伏安法。结果表明:CdSe/TiO(2)NTA表面覆盖一层薄的NixCo3-x,O-4，具有尖晶石结构，其中Ni和Co同时处于二价和三价状态;与CdSe/TiO(2)NTA相比，NixCo3-x,O-4在CdSe/TiO(2)NTA上的修饰可使水氧化过电位降低约430 mV。在Co3O4的结构中引入Ni，导致三价阳离子(Ni3+和Co3+)的表面增强，从而促进了水的氧化。

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Effect of Ni_xCo_(3-x)O_4 Modification for CdSe/TiO_2 Nanotube Arrays on Activity of Photoelectrochemical Oxidation of Water

CdSe/TiO2 nanotube array (TiO(2)NTA) film was modified by NixCo3-x,O-4 through the method of ammonia-evaporation induction growth. The films were characterized by X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy and UV-Vis diffuse reflectance spectroscopy. To characterize the photoanodes activity of photoelectrochemical oxidation of water, the chopped linear sweep voltammetry was performed in a three-electrode system under simulated solar irradiation. The results show that CdSe/TiO(2)NTA is covered by a thin layer of NixCo3-x,O-4 with the spinel structure in which Ni and Co are both in divalent and trivalent states. The modification of NixCo3-x,O-4 on the CdSe/TiO(2)NTA can lower the overpotential of water oxidation by about 430 mV compared with the CdSe/TiO(2)NTA. The introduction of Ni into the structure of Co3O4 leads to the surface enhancement of trivalent cations (Ni3+ and Co3+) and consequently facilitates the oxidation of water.

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来源期刊

无机化学学报化学-无机化学与核化学

CiteScore

1.40

自引率

42.90%

发文量

8709

审稿时长

2.2 months

期刊介绍： “Chinese Journal of Inorganic Chemistry” publishes fundamental studies in all phases of inorganic chemistry, including solid-state chemistry, coordination chemistry, inorganic materials chemistry, bioinorganic chemistry, organometallic chemistry, theoretical inorganic chemistry, supermolecule chemistry, applied inorganic chemistry and related field of catalysis. Emphasis is on the synthesis, thermodynamics, kinetics, spectroscopy, structure and bonding properties of new and known compounds. In addition to full-length research articles, “Chinese Journal of Inorganic Chemistry” also publishes notes, letters, and reviews. “Chinese Journal of Inorganic Chemistry” accepts manuscript written in simplified Chinese or English.