摘要
采用光化学合成技术制备了比表面积可控的纳米多孔SnO2光催化材料,探讨了其光催化降解罗丹明B溶液的反应机理，将SnSO4和稀硫酸混合配制成前驱体溶液,利用低功率紫外灯辐照诱导光化学反应制备了纳米多孔SnO2，当前驱体溶液中硫酸浓度在0.1～0.5 mol/L范围时,纳米多孔SnO2的比表面积可控制在13～119 m2/g范围，以罗丹明B为目标降解物,SnO2的光催化性能随着比表面积的增加而增大，当硫酸的浓度为0.5 mol/L时,所制备的SnO2样品对于光催化降解罗丹明B溶液具有最高的效率。
Nanoporous SnO2 with varied specific surface area was prepared by a photochemical preparation technology and employed in photocatalytic degradation of rhodamine B. The corresponding photodegradation mechanism was analyzed as well. Using the mixed aqueous solution of SnSO4 and diluted H2SO4 as the precursor,nanoporous SnO2 could form in the solution and at the air- water interface under irradiation of a low power ultraviolet lamp.When the concentration of H2SO4 was controlled between 0. 1 mol /L and 0. 5 mol /L,the specific surface area of the product was tuned in the range of 13 ～ 119 m^2/g. Taking the photodegradation of rhodamine B as an example,the photocatalytic activity varied with the increase of the specific surface area of nanoporous SnO2 was evaluated.The sample from 0. 5 mol /L H2SO4 showed the highest photocatalytic activity in efficient photocatalytic degradation of RhB.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2014年第3期56-59,共4页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(21071057)
