铜藻基活性炭/二氧化钛催化剂的制备及性能

Preparation and properties of Sargassum horneri activated carbon/titania photo-catalyst

以铜藻作为生物质原料,以聚四氟乙烯作为活化剂,经过高温煅烧制备了铜藻基活性炭(AC),利用溶胶-凝胶法制备了纳米二氧化钛粒子(TiO2),在制备二氧化钛过程中加入一定量的铜藻基活性炭,制备了AC-TiO2。采用侧柏提取液还原后的AgNO3溶液对TiO2进行还原改性处理,成功制得AC-(TiO2-Ag)复合材料。样品的表征结果表明:AC负载后材料的禁带宽度发生了明显的红移,说明了对光的利用率提升,光降解性能明显改善,Ag改性进一步提升了这种效果,AC-(TiO2-Ag),AC-TiO2和TiO2的禁带宽度分别为2.41,2.58,3.26 eV。

Sargassum horneri was used as biomass raw material and polytetrafluoroethylene as activator.After high temperature calcination,Sargassum horneri-based activated carbon(AC)was prepared,and nano-titania particles(TiO2)were prepared by sol-gel method.A certain amount of Sargassum horneri-based activated carbon was added to prepare TiO2/AC.Using AgNO 3 solution reduced by platycladus orientalis extract to reduce and modify TiO2,AC-(TiO2-Ag)composite material was successfully prepared.The characterization results of the sample showed that the width of the band gap of the material has a significant red shift after AC loading,indicating that the utilization rate of light is improved,and the photodegradation performance is significantly improved and Ag modification further enhance this effect.The band gap widths of AC-(TiO2-Ag),AC-TiO 2,and TiO2 are 2.41,2.58 and 3.26 eV,respectively.