A P25/(NH(4))(x)WO(3) hybrid photocatalyst with broad spectrum photocatalytic properties under UV, visible, and near-infrared irradiation.
A P25/(NH(4))(x)WO(3) hybrid photocatalyst with broad spectrum photocatalytic properties under UV, visible, and near-infrared irradiation.
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DOI：
10.1038/srep45715
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发表时间：
2017-04-03
影响因子：
4.6
通讯作者：
Wang Y
中科院分区：
文献类型：
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作者：
Yang L;Liu B;Liu T;Ma X;Li H;Yin S;Sato T;Wang Y
采用一步水热法成功制备了一系列P25/（NH 4）xWO 3纳米复合光催化剂，其平均晶粒尺寸分别为30 nm和130 nm。通过透射电子显微镜（TEM）对样品进行了表征，结果表明P25/（NH 4）xWO 3纳米复合材料具有良好的纳米界面。XPS分析结果表明，样品中存在W5+和W 6+的混合价态，低价态的W5+可能是近红外吸收的来源。光吸收结果表明，P25/（NH 4）xWO 3纳米复合材料在200-2500 nm的太阳光谱范围内具有较高的光吸收。P25/（NH 4）xWO 3纳米复合材料利用P25独特的光吸收特性和（NH 4）xWO 3的协同效应，实现了对罗丹明B的紫外、可见和近红外光催化降解。同时，通过XRD和XPS对反应后的光催化剂进行了稳定性考察。结果表明，P25/（NH 4）xWO 3光催化剂在能源利用和解决日益恶化的环境问题方面具有广阔的应用前景。
In this study, a series of hybrid nanostructured photocatalysts P25/(NH4)xWO3 nanocomposites with the average crystallite size of P25 and (NH4)xWO3 of the sample was calculated to be about 30 nm and 130 nm, were successfully synthesized via a simple one-step hydrothermal method. The as-obtained samples was characterized by transmission electron microscopy (TEM), which implies that the P25/(NH4)xWO3 nanocomposites are fabricated with favourable nanosizd interfacial. The XPS results confirmed that the obtained sample consists of mixed chemical valences of W5+ and W6+, the low-valance W5+ sites could be the origin of NIR absorption. As revealed by optical absorption results, P25/(NH4)xWO3 nanocomposites possess high optical absorption in the whole solar spectrum of 200–2500 nm. Benefiting from this unique photo-absorption property and the synergistic effect of P25 and (NH4)xWO3, broad spectrum response photocatalytic activities covering UV, visible and near infrared regions on degradation of Rhodamine B have been realized by P25/(NH4)xWO3 nanocomposites. Meanwhile, the stability of photocatalysts was examined by the XRD and XPS of the photocatalysts after the reaction. The results show that P25/(NH4)xWO3 photocatalysts has a brilliant application prospect in the energy utilization to solve deteriorating environmental issues.