PDF(Pubmed)
Abstract：
Titanium dioxide was synthesized via hydrolysis of titanium (IV) isopropoxide using a sol-gel method, under neutral or basic conditions, and heated in the microwave-assisted solvothermal reactor and/or high-temperature furnace. The phase composition of the prepared samples was determined using the X-ray diffraction method. The specific surface area and pore volumes were determined through low-temperature nitrogen adsorption/desorption studies. The photoactivity of the samples was tested through photocatalytic reduction of carbon dioxide. The composition of the gas phase was analyzed using gas chromatography, and hydrogen, carbon oxide, and methane were identified. The influence of pH and heat treatment on the physicochemical properties of titania-based materials during photoreduction of carbon dioxide have been studied. It was found that the photocatalysts prepared in neutral environment were shown to result in a higher content of hydrogen, carbon monoxide, and methane in the gas phase compared to photocatalysts obtained under basic conditions. The highest amounts of hydrogen were detected in the processes using photocatalysts heated in the microwave reactor, and double-heated photocatalysts.
摘要：
二氧化钛是通过使用溶胶-凝胶法水解异丙醇钛（IV）合成的，在中性或基本条件下，并在微波辅助溶剂热反应器和/或高温炉中加热。使用X射线衍射法测定制备的样品的相组成。通过低温氮吸附/解吸研究确定比表面积和孔体积。通过光催化还原二氧化碳测试样品的光活性。使用气相色谱法分析气相的组成，和氢，碳氧化物,甲烷被识别出来了.研究了pH和热处理对二氧化碳光还原过程中二氧化钛基材料物理化学性质的影响。发现在中性环境中制备的光催化剂显示出较高的氢含量，一氧化碳,与在基本条件下获得的光催化剂相比，气相中的甲烷。在使用在微波反应器中加热的光催化剂的过程中检测到最高量的氢气，和双重加热的光催化剂。
