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首页> 外文期刊>RSC Advances >Facile synthesis of a WOx/CsyWO3 heterostructured composite as a visible light photocatalyst
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Facile synthesis of a WOx/CsyWO3 heterostructured composite as a visible light photocatalyst

机译：轻松合成WOx / CsyWO3异质结构复合材料作为可见光光催化剂

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In this work, a WO _( x ) /Cs _( y ) WO _(3) heterostructured composite was synthesized via a simple pyrolysis method followed by heat treatment under a reducing atmosphere. Optical absorption results revealed the WO _( x ) /Cs _( y ) WO _(3) heterostructured composite exhibits a strong absorption tail in the Vis and NIR regions which could have important implications for its photoactivity. The photocatalytic performance of synthesized samples with different Cs/W molar ratios was evaluated by the photodegradation of RhB in aqueous solution under simulated solar light irradiation. The results revealed that the photocatalytic activity of the WO _( x ) /Cs _( y ) WO _(3) composite is much higher than those of pure tungsten bronze (Cs _( x ) WO _(3) , x = 0.32, and 0.5) and pure WO _(2.83) samples, where 90% RhB was degraded after 160 min irradiation. Also, the WO _( x ) /Cs _( y ) WO _(3) composite exhibits excellent photocatalytic activity for the degradation of MO, MB, RhB, and MG aqueous solution under visible light irradiation. It is proposed that the higher photocatalytic activity of the WO _( x ) /Cs _( y ) WO _(3) composite could be attributed to the greater surface adsorption of dye molecules, intense light absorption in the visible and NIR regions, and photogenerated electron–hole separation.
机译：在这项工作中，通过简单的热解方法，然后在还原性气氛下进行热处理，合成了WO_（x）/ Cs_（y）WO_（3）异质结构复合材料。光吸收结果表明，WO_（x）/ Cs_（y）WO_（3）异质结构复合材料在Vis和NIR区域显示出强大的吸收尾巴，这可能对其光活性具有重要意义。通过模拟模拟太阳光下水溶液中RhB的光降解作用，评价了不同Cs / W摩尔比的合成样品的光催化性能。结果表明，WO _（x）/ Cs _（y）WO _（3）复合材料的光催化活性远高于纯钨青铜（Cs _（x）WO _（3），x = 0.32 ，以及0.5）和纯WO _（2.83）样品，其中160％的照射后90％的RhB降解。另外，WO _（x）/ Cs _（y）WO _（3）复合材料在可见光照射下对MO，MB，RhB和MG水溶液的降解显示出优异的光催化活性。有人提出WO_（x）/ Cs_（y）WO_（3）复合材料的较高的光催化活性可以归因于染料分子的更大表面吸附，可见光和近红外区域的强烈光吸收以及光生电子-空穴分离。

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