School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255000, PR China; State Key Laboratory of Mineral Processing, Beijing, 100160, PR China.
Department of Materials Engineering, KU Leuven, 3001, Leuven, Belgium.
J Environ Manage. 2021 Nov 1;297:113311. doi: 10.1016/j.jenvman.2021.113311. Epub 2021 Jul 16.
In the present work, TiO-graphite-phase-carbon-nitride (TiO/g-CN) was prepared through a hydrothermal method to obtain a new photocatalytic material. This material was characterized by means of scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray energy spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Solid-state UV-Vis diffuse reflectance spectrometry (UV-Vis-DRS) and electron paramagnetic resonance (EPR). The synthesized TiO/g-CN exhibited homogeneous morphology, in which TiO nanoparticles were uniformly distributed on the g-CN nanosheets. Regarding its potential use as photocatalytic material in the treatment of mineral processing wastewater, 18% TiO/g-CN showed superior photodegradation performance than TiO and g-CN, to give 97.1% degradation rate under 100 min of simulated light irradiation. The experimental results showed that the successful incorporation of TiO on g-CN nanosheets enhanced the spectral response range of TiO/g-CN, and the photocatalytic activity was improved. In view of that, it can be considered that this kind of photocatalytic material has a good prospect in the treatment of mineral processing wastewater, which would have clearly environmental relevance.
在本工作中，通过水热法制备了 TiO-石墨相氮化碳（TiO/g-CN），以获得一种新型光催化材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X 射线能谱仪（EDS）、X 射线衍射（XRD）、X 射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、固态紫外可见漫反射光谱（UV-Vis-DRS）和电子顺磁共振（EPR）对其进行了表征。合成的 TiO/g-CN 呈现均匀的形貌，其中 TiO 纳米颗粒均匀分布在 g-CN 纳米片上。鉴于其作为光催化材料在处理选矿废水方面的潜在应用，在 100 分钟模拟光照下，18%TiO/g-CN 的光降解性能优于 TiO 和 g-CN，降解率达到 97.1%。实验结果表明，TiO 成功地掺入 g-CN 纳米片中，增强了 TiO/g-CN 的光谱响应范围，提高了光催化活性。鉴于此，可以认为这种光催化材料在处理选矿废水中具有良好的前景，这将具有明显的环境相关性。
