化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (10) : 210-216.

科学研究

MIL-125/4N-TiO₂复合光催化材料的制备及其光催化性能研究

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Study on preparation and photocatalysis of MIL-125/4N-TiO₂ composite material

Xiong Leyan ,Zhang Nan ,Ma Wei ,Guo Zanru ,Zheng Longzhen

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摘要

通过凝胶-溶胶法、水热法分别制备了4N-TiO₂纳米粒子和MIL-125 MOFs两种材料。通过配位自组装法制备了复合材料MIL-125/4N-TiO₂。分别通过扫描电镜、红外光谱、XRD、N₂吸附-脱附等手段对所制备的复合材料进行了表征。分析表明,得到了MIL-125/4N-TiO₂复合材料。通过光催化降解罗丹明6G模型化合物,发现复合材料具有光催化降解能力,并发现在pH为7的条件下,MIL-125与4N-TiO₂的比例为1∶1时,降解罗丹明6G效率最高,可达98.12%;MIL-125与4N-TiO₂的比例为3∶1时,吸附罗丹明6G效率最高,可达63.7%。通过分析光催化前后产物,得出该复合光催化剂能够吸附并光降解罗丹明6G。

Abstract

4N-TiO₂ particles and MIL-125 were prepared by the sol-gel method and hydrothermal method respectively.The MIL-125/4N-TiO₂ were prepared by coordination reaction induced self-assembly route.The MIL-125/4N-TiO₂ was characterized by scanning electron microscope (SEM),infrared spectroscopy (IR),X-ray diffraction (XRD) and nitrogen adsorption-desorption isotherm.Based on the results,it was found that MIL-125/4N-TiO₂ was synthesized successfully.Through the photocatalytic degradation of rhodamine 6G model compounds,the composite had the property of photocatalytic degradation.When pH value was 7,the ratio of MIL-125 and 4N-TiO₂ was 1∶1,the degradation ratio was the best of 98.12%.When the ratio of MIL-125 to 4N-TiO₂ was 3∶1,the adsorption ratio was 63.7%.By comparing the infrared spectra of composites before and after photocatalytic oxidation,it was concluded that the composite was able to adsorb rhodamine 6G,and then photocatalytic degraded it.

关键词

复合材料 / MIL-125/4N-TiO₂ / 吸附降解 / 最优降解条件 / 罗丹明6G

Key words

composite material / MIL-125/4N-TiO₂ / absorption degradation / optimum condition / Rhodamine 6G

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MIL-125/4N-TiO₂复合光催化材料的制备及其光催化性能研究[J]. 化工新型材料, 2018, 46(10): 210-216 DOI:

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