Synthesis of indium borate and its application in photodegradation of 4-chlorophenol.
Synthesis of indium borate and its application in photodegradation of 4-chlorophenol.
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DOI：
10.1021/es203333k
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发表时间：
2012-02
影响因子：
11.4
通讯作者：
Jixiang Yuan;Qiang Wu;Peng Zhang;J. Yao;T. He;Yaan Cao
中科院分区：
文献类型：
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作者：
Jixiang Yuan;Qiang Wu;Peng Zhang;J. Yao;T. He;Yaan Cao
采用溶胶-凝胶法制备硼酸铟。通过X射线衍射（XRD）、透射电子显微镜（TEM）和漫反射紫外-可见光谱技术研究了所得光催化剂的结构、形态和光物理。这些光催化剂已用于光降解 4-氯苯酚。光催化活性取决于制备过程中的退火温度。研究发现硼酸盐在紫外光照射下表现出较高的光降解活性，其效率高于所制备的TiO(2)。这是根据荧光光谱和价带X射线光电子能谱(XPS)的结果来解释的。时间分辨光致发光衰变光谱的结果证实了这一点；即，硼酸盐的辐射过程中涉及的电子和空穴的寿命可能比 TiO(2) 的更长。这意味着硼酸铟可以成为未来用于处理环境污染物的有前途的光催化剂。
Indium borate has been prepared by a sol-gel method. The structure, morphology, and photophysics of the resultant photocatalysts have been studied via the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance UV-visible light spectroscopy. These photocatalysts have been used to photodegrade 4-chlorophenol. The photocatalytic activity depends on the annealing temperature during preparation. It is found that borates can exhibit a high photodegradation activity under UV-light irradiation, for which the efficiency can be higher than that of as-prepared TiO(2). This is explained according to the results of fluorescence spectra and valence band X-ray photoelectron spectroscopy (XPS). It is confirmed by the results of time-resolved photoluminescence decay spectra; i.e., the lifetime of electrons and holes involved in the radiative process can be longer for the borates than that for TiO(2). This implies that indium borate can be a promising photocatalyst for future applications in treatment of environment contaminants.