Yuan Binxia, Liu Yuhao, Qian Hong, Zhu Rui, Zhang Chengxi, Luan Weiling
College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 201306, P.R. China.
Department of Optoelectronic Information Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China.
iScience. 2024 Jun 25;27(7):110377. doi: 10.1016/j.isci.2024.110377. eCollection 2024 Jul 19.
In this study, the theoretical calculations proves that the combination of oxygen vacancy and amorphous carbon films in TiO (V-CT) can effectively reduce the energy bandgap and work function. The minimum Gibbs free energies required for the CORR reaction of V-CT are 0.20 eV, which is lower than pure TiO. The amorphous c@TiO nanomaterials with oxygen vacancy and mesoporous structures (V-MCT) are prepared with the P123 surfactant as the template and oxalic acid as an inducer. The electron paramagnetic resonance indicates the presence of abundant oxygen vacancy defects in the samples. UV-vis spectra indicate that the mesoporous structure enhances light absorption capacity. The photocatalytic CO reduction tests show that the highest conversion rates for CH and CO of V-MCT are 14 μmol g h and 10.66 μmol g h, respectively. The electron consumption rate of V-MCT is 12.43 times higher than that of commercial TiO (P200).
在本研究中，理论计算证明，TiO（V-CT）中氧空位与非晶碳膜的结合可有效降低能带隙和功函数。V-CT的CORR反应所需的最小吉布斯自由能为0.20 eV，低于纯TiO。以P123表面活性剂为模板、草酸为诱导剂制备了具有氧空位和介孔结构的非晶c@TiO纳米材料（V-MCT）。电子顺磁共振表明样品中存在大量氧空位缺陷。紫外可见光谱表明介孔结构增强了光吸收能力。光催化CO还原试验表明，V-MCT对CH和CO的最高转化率分别为14 μmol g h和10.66 μmol g h。V-MCT的电子消耗率比商用TiO（P200）高12.43倍。
