Abstract To study the effect of improved adsorption property of tetrapod-like ZnO (T-ZnO) on its photocatalytic performance, a new composite was prepared by loading silica aerogels (SiO2(AG)) on the surface of T-ZnO via the sol–gel method. Various characterization methods showed that SiO2(AG) was uniformly loaded on the surface of T-ZnO, and the morphology as well as structural characteristics of SiO2(AG) and T-ZnO were not changed. Nitrobenzene (NB) was selected as the model pollutant, and the adsorption and photocatalytic properties of T-ZnO and SiO2(AG)/T-ZnO for NB were studied. The photocatalytic degradation processes of NB using T-ZnO and SiO2(AG)/T-ZnO followed the first-order reaction. Considering the initial moment reaction kinetic, the photocatalytic kinetic of SiO2(AG)/T-ZnO and T-ZnO was consistent with the Langmuir–Hinshelwood kinetic model, and reaction rate constant k SiO 2 AG / T-ZnO ′ > k T-ZnO ′ {k}_{{\text{SiO}}_{2}\left(\text{AG}\right)/\text{T-ZnO}}^{^{\prime} }\gt {k}_{\text{T-ZnO}}^{^{\prime} } , adsorption rate constant K ad SiO 2 ( AG ) / T-ZnO {K}_{\text{ad}{\text{SiO}}_{2}(\text{AG})/\text{T-ZnO}} > K ad T-ZnO, which demonstrated that SiO2(AG) loading could increase T-ZnO adsorption to NB, then promoted its photocatalytic performance.

中文翻译：

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SiO2气凝胶负载量对四足类ZnO复合材料光催化降解硝基苯的影响

摘要 为了研究四足类 ZnO (T-ZnO) 吸附性能的提高对其光催化性能的影响，通过溶胶-ZnO 负载二氧化硅气凝胶 (SiO2(AG)) 制备了一种新型复合材料。凝胶法。各种表征方法表明，SiO2(AG)均匀负载在T-ZnO表面，SiO2(AG)和T-ZnO的形貌和结构特征没有发生变化。以硝基苯(NB)为模型污染物,研究了T-ZnO和SiO2(AG)/T-ZnO对NB的吸附和光催化性能。使用 T-ZnO 和 SiO2(AG)/T-ZnO 光催化降解 NB 的过程遵循一级反应。考虑初矩反应动力学，