Shao Wei, Zhang Hua, Gao Kai, Wan Dong, Zhang Xingxiang
October 1, 2014
Acrylonitrile-vinylidene chloride (AN-VDC) copolymer films containing activated carbon, manganese dioxide nanoparticles were fabricated via casting method. The formaldehyde degradation capacity of copolymer film was investigated. The results showed that formaldehyde eliminating rate was obviously improved when copolymer film was blended with MnO 2 or activated carbon, respectively. The HCHO removal rate increased with concentration of MnO 2 or activated carbon. HCHO degradation rate of AN-VDC copolymer film without addition was 45 % for 48 h, while it was up to 90–95 % with the treatment time of 36 h after 3 wt.-% MnO 2 or activated carbon addition. Furthermore, the complex effect of MnO 2 and activated carbon on the degradation has also been studied. When 3 wt.-% MnO 2 and 1 wt.-% activated carbon was mixed into copolymer, the HCHO removal rate was about 90 % for 36 h treatment. The results demonstrated that the formaldehyde eliminating rate was enhanced by complex addition of both MnO 2 and activated carbon compared to films with single additions. The enhancement of HCHO eliminating efficiency occured due to a double effect of physical absorption of activated carbon and catalytic oxidation of MnO 2 .