谷壳源二氧化钛/石墨烯纳米复合材料光催化降解水样中活性红195

Husk Derived TiO_2 Nanobelt/Graphene Composites Photocatalyzed Degradation of Reactive Red 195 in Water

偶氮染料类污染物对水质安全构成直接威胁。本工作选用典型偶氮染料活性红195为模板污染物,以所制备的谷壳源二氧化钛/石墨烯纳米复合材料(TiO_2/GR)为光催化剂,深入研究了水样中模板污染物活性红195光催化降解效果。分别研究了光照射时间、温度、TiO_2/GR光催化剂添加量、染料起始浓度等不同影响条件对光催化降解活性红195染料的影响。实验数据显示,常温下,小剂量TiO_2/GR纳米复合材料即可光降解0.25 mg/m L至3.5 mg/m L较宽浓度范围的水样中活性红195偶氮染料,降解率最高可达到100%,充分显示了该纳米材料在水质净化中的优势。

Residual azo dye pollutants pose direct threat to water quality. Herein, we chose the typical azo dye active red 195 for the template contaminants. In this work, husk derived YiO2/graphene nanocomposiles ITiO2/GR） photocatalyzed degradation processes of TiO=/GR for reactive red 195 in water under infrared light is studied. Different experimental conditions such as temperature, pH value, infrared time, the amount of TiO2/GR photocatalyst as well as starting concentration of reactive red 195 were studied to lind optimal photocatalytic conditions for aqueous reactive red 195. Investigations found that an optimal removal efficiency of 100% alter 5h can be achieved readily at reactive red 195 concentrations range of 0.25-3.5 mg/mL indicating that the prepared TiO2/GR nanocomposites can be used to remove residual reactive red 195 in contaminated natural or drinking water, providing novel insights for broad potential water purification applications.