摘要
以利用农业废弃物稻壳制备光催化性的SiO2为目的,用NaOH消解稻壳得到了含有硅资源的溶液。以CTAB为模板,利用稻壳消解液合成了含硅固体样品。通过红外光谱分析法和X射线衍射法分别表征了合成样品是介孔状SiO2。并通过紫外可见分光光度法研究了合成的SiO2对染料代表的亚甲基蓝的光催化降解性,发现亚甲基蓝溶液的吸光度随时间变小,证明了所制备的SiO2具有光催化性。运用单因子变量法,得知在SiO2投加量为300 mg,pH为6时,对浓度为40 mg/L的50 m L亚甲基蓝溶液的光催化降解率可达62.3%。
In order to utilize the rice husk,which is the agricultural waste to prepare the photocatalytic SiO2,the NaOH solution was used as digestion reagent to treat the rice husk and the solution containing silicon resources was prepared. The solid sample was synthesized from digestion rice husk solution by adding CTAB as a template. The infrared spectrum analysis and X-ray diffraction analysis indicated that the state of the synthesized sample was mesoporous SiO2. The photocatalysis properties of SiO2 were investigated by methylene blue,which is the representative of dye by UV-Visible spectrophotometry method. Absorbance of the methylene blue solution decreasd with the increase of the illumination time,proving that the prepared SiO2 sample was of photocatalysis.It was also proved by the single factor variable method found that the photocatalytic degradation rate of methylene blue was 62. 3% when the concentration of methylene blue solution was 40 mg/L,SiO2 dosage was 300 mg,pH was 6.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第9期4239-4244,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(21066006)
内蒙古自然科学基金项目(2014MS0202)
内蒙古留学回国人员小额资助项目
关键词
稻壳
介孔状SiO2
光催化性
降解率
rice husk
mesoporous silica
photocatalysis
degradation rate
