碳微球负载Ag_3PO_4的合成与其光催化性能

Synthesis and Photocatalytic Activity of Ag_3PO_4 on Carbon Microspheres

以碳微球(CMSs)为载体,采用离子交换法制备了CMSs负载的磷酸银复合材料(CMSs/Ag3PO4)。对合成的CMSs/Ag3PO4复合材料的相组成、表面形貌和紫外-可见(UV-Vis)吸收光谱进行了表征,通过可见光催化降解甲基橙实验对所制备的CMSs/Ag3PO4复合材料的光催化活性进行了考察。结果表明:CMSs颗粒大小在100~200 nm,CMSs/Ag3PO4颗粒大小在200~250 nm;CMSs/Ag3PO4在可见光范围有强吸收,在可见光照射下,CMSs/Ag3PO4能有效地降解甲基橙,光照射60min对甲基橙的降解率可以达到92.5%;循环使用5次后,对甲基橙的降解率仍然保持为86.2%。

The carbon microspheres(CMSs)/Ag3PO4 composite was prepared by an ion-exchange method using CMSs as a temperate. The CMSs/Ag3PO4 composite samples prepared were characterized. The photocatalytic activity of CMSs/Ag3PO4 composite was investigated via the photocatalytic degradation of methyl orange test. The results show that the size of carbon microspheres is 100–200 nm, and the size of the CMSs/Ag3PO4 is 200–250 nm. According to the analysis by UV-Vis spectrophotometry, the CMSs/Ag3PO4 composite has an intensive adsorption for visible light, and can degrade methyl orange effectively under visible light irradiation.The degradation rate of methyl orange is 92.5% under visible light irradiating for 60 min. The degradation rate of methyl orange is 86.2% after recycling for five times.