TiO_2超声光催化降解荧光增白剂—CBW

TiO_2 SONOPHOTOCATALYTIC DEGRADATION FLUORESCENT WHITENING AGENT—CBW

均匀沉淀法制备了纳米TiO2 ,TEM ,XRD分别进行了表征。以该纳米TiO2 为光催化剂 ,对超声光催化降解荧光增白剂CBW的反应进行了研究。结果表明 ,超声波的引入提高了纳米TiO2 光催化降解CBW的反应效率 ;反应符合Langmuir Hinshelwood动力学模型 ,表观反应速率常数k1为 0 .0 2 6 6min-1;反应受超声波功率的影响 ;溶液中添加少量的Fe3 + ,H3 PW12 O40 、H2 O2

Homogeneous precipitation method has been used to yield the nanometer TiO 2 powder particles. The TEM, XRD analyzed the microcrystal particle physical and chemical properties. The sono photocatalytic degradation fluorescent whitening agent CBW solution was investigated using the TiO 2 as photocatalyst. The results show: through the hybrid of ultrasonic and photocatalytic functions, the decomposing efficiency of CBW solution has been heightened; the reaction abided by Langumiur Hinshelwood kinetics model, the apparent reaction rate constant k 1 is 0.0266 min -1 ; the decomposing efficiency has been affected by the power of ultrasonic, and it can been visibly promoted by adding a few Fe 3+ , H 3PW 12 O 40 and H 2O 2.