摘要
以五水合硝酸铋和系列磷酸盐为起始原料,采用简单水热法制备棒状BiPO4粉体。采用XRD、SEM、EDS和UV-Vis吸收光谱等手段对其组成、纯度、形貌和光吸收特性进行表征;以金卤灯为实验光源,次甲基蓝为模型污染物,考察系列BiPO4光催化剂的的光催化活性;在此基础上,以二苯并噻吩为模拟含硫污染物探讨了所得BiPO4对模拟FCC汽油的光催化氧化脱硫(Photo-Cat-ODS)活性。SEM测试表明,所得BiPO4粉体均为棒状结构,且起始磷酸盐对产物的尺寸有一定的影响。光催化活性研究结果表明,在模拟太阳光照射下,所合成的系列BiPO4粉体对阳离子染料次甲基蓝有非常高的光催化降解活性,而且催化剂的形貌和尺寸对催化剂光催化活性的影响显著,当以磷酸二氢铵为原料时,所得样品NH2-BiPO4的活性最高。模拟FCC汽油光催化脱硫实验结果表明,空气为氧化剂条件下,NH2-BiPO4微晶对模拟FCC汽油具有较高的脱硫活性,模拟太阳光连续照射2 h,模拟汽油脱硫率高达90.5%。
Using Bi（ NO3 ） · 5H2O and different phosphate as starting materials, the rod-like BiPO4 powders was obtained by facile hydrothermal method. The phase structure, purity, optical properties and morphology of as-synthesized samples were investigated by XRD, EDS, UV-Vis adsorption spectrum and SEM techniques. Cationic methylene blue was selected as a model to evaluate the photocatalytic activity of as-synthesized series BiPO4 photocatalyst. Furthermore, dibenzothiophene was selected as a typical pollutant of simulated fuel to evaluate the photocatalytic oxidative desulfurization （Photo-Cat-ODS） activity of as-prepared NHE-BiPO4. SEM results indicate that as-prepared BiPO4-based photocatalyst has the novel rod-like morphology. The starting phosphate has obvious effect on the morphology and size of as prepared BiPO4 photocatalyst. The photocatalysis experimental results indicated that the as-synthesized series BiPO4 show the sensational photocatalytic activity of cationic pollutant methylene blue. In addition, the morphology and size exhibit the significant effect on the photocatalytic activity of as-prepared BiPO4 photocatalyst. Using ammonium biphosphate as the starting materials, the resulted sample （NH2-BiPO4 ） showed the best photocatalytic activity. Furthermore, the desulfurization rate of simulated FCC fuel reached 90.5 % when used NH2-BiP04 microcrystalline as photoeatalyst and air as oxidant.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2014年第1期203-210,共8页
Journal of Synthetic Crystals
基金
陕西省科技厅工业攻关项目(2013K11-08)
陕西省教育厅专项科研基金(13JK0669
12JS117
12JK0597)
延安市工业攻关项目(2011KG-13)
关键词
水热法
BiPO4微晶
光催化氧化脱硫
hydrothermal method
BiPO4 microcrystaline
photocatalytic oxidative desulfurization
