Enhancing the Photocatalytic Performance of Commercial TiO2 Crystals by Coupling with Trace Narrow-Band-Gap Ag2CO3

Enhancing the Photocatalytic Performance of Commercial TiO2 Crystals by Coupling with Trace Narrow-Band-Gap Ag2CO3
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通过与微量窄带隙 Ag2CO3 耦合增强商用 TiO2 晶体的光催化性能

DOI:
10.1021/ie404283d
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发表时间:
2014-04
影响因子:
4.2
通讯作者:
Qizhe Fan
Qizhe Fan
中科院分区:
工程技术3区
文献类型:
--
作者:
Jianchai Chen;Yu Xie;Wanqin Zhou;Qizhe Fan

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通过简单的沉淀方法将痕量 Ag2CO3(0.5%、1%、2% 和 4%)负载在商用 TiO2 晶体上。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散X射线光谱(EDX)、X射线光电子能谱(XPS)、光致发光(PL)光谱和紫外可见漫反射光谱对所得Ag2CO3/TiO2复合材料进行了表征。 (DRS)。在紫外光(λ=254 nm)或可见光照射下,测试样品对甲基橙(MO)的降解性能。结果表明,负载 1 wt% Ag2CO3 可获得最佳的光催化活性。在紫外或可见光照射下,1%Ag2CO3/TiO2复合材料的降解活性分别是TiO2的6倍、Ag2CO3的4倍或TiO2的3.4倍、Ag2CO3的1.7倍。发现活性增强的原因是Ag2CO3的偶联促进了可见光吸收并抑制了复合...
Trace Ag2CO3 (0.5%, 1%, 2%, and 4%) was loaded on commercial TiO2 crystals by a facile precipitation method. The obtained Ag2CO3/TiO2 composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), photolimunescence (PL) spectroscopy, and UV–vis diffuse reflectance spectroscopy (DRS). Under UV light (λ = 254 nm) or visible light irradiation, the photocatalytic performance of the samples was tested in degradation of methyl orange (MO). Results showed that loading of 1 wt % Ag2CO3 results in the best photocatalytic activity. Under UV or visible light irradiation, the degradation activity of 1%Ag2CO3/TiO2 composite is 6 times that of TiO2 and 4 times that of Ag2CO3 or 3.4 times that of TiO2 and 1.7 times that of Ag2CO3. Reasons for enhanced activity were found that the coupling of Ag2CO3 promoted the visible light absorption and suppressed the recombination...
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