SiO2-Encapsulated Ag/WO3 Nano-architectures for Azoxybenzene Production via Simultaneous Activation of Aniline and Molecular O2
SiO2-Encapsulated Ag/WO3 Nano-architectures for Azoxybenzene Production via Simultaneous Activation of Aniline and Molecular O2
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DOI：
10.1021/acsanm.3c02843
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发表时间：
2023-09-22
影响因子：
5.9
通讯作者：
Bal, Rajaram
中科院分区：
文献类型：
--
作者：
Ghosh, Shilpi;Sharma, Sachin Kumar;Bal, Rajaram
采用表面活性剂辅助水热法制备了嵌入二氧化硅网络通道内的Ag/WO_3纳米复合材料。结构和形态研究表明，该材料具有二维型玉米须状纳米结构。更高分辨率的电子显微镜结果表明，负载在WO_3单元上的孪晶银纳米粒子嵌入到堆积的二氧化硅层中，没有团聚。这种独特的形貌导致了Ag/WO3骨架的高度分散，迫使更多暴露的表面活性Ag(111)位的存在，从而触发了分子O-2的活化，从而提供了高产率的偶氮苯，并用密度泛函理论解释了这一现象。
Nanocomposites Ag/WO3 intercalated within the channels of the silica network have been developed using a surfactant-assisted hydrothermal process. Structural and morphological studies indicated that the material exhibited two-dimensional type enchiladas-like nanoarchitectures. Higher-resolution electron microscopy results demonstrated that twinned Ag nanoparticles supported on WO3 units were embedded within the stacked layers of silica without agglomerating. This unique morphology led to higher dispersion of the Ag/WO3 framework that compelled the availability of more exposed surface-active Ag(111) sites, which triggered the activation of molecular O-2 in furnishing a high yield of azoxybenzene, and this phenomenon has been explained in the light of DFT.