Photocatalytic degradation of trichloroethylene in air on nanometer ZnO-SnO2 coupled oxides supported onto the porous nickel mesh
泡沫镍负载纳米ZnO-SnO2光催化降解三氯乙烯

A coupled oxide ZnO-SnO2, which was prepared by the co-precipitation method, was immobilized to porous nickel mesh by coating, and a ZnO-SnO2/Ni supported photocatalyst was prepared. The photocatalytic degradation performance of the supported photocatalyst on chemical trichloroethylene (TCE) as gaseous model was investigated in the photocatalytic reactor.It was studied that some factors such as the gas flow rate, the relative humidity etc, which would influence the photocatalytic conversion efficiencies of TCE, and the lifetime of the supported photocatalyst also was tested. It was found that the gaseous photocatalysis over the supported photocatalyst is an efficient method for chlorinated hydrocarbon removal, and almost 100% conversion was found for TCE with a concentration up to 2350mg?m-3 in flow through dry synthetic gas stream. Moreover, the experiments keeping a long time run indicated the supported photocatalyst displayed long lifetime, and the deactivation of the supported photocatalyst had not been observed within the 205h of the experimental period.