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Yi Zhao,Tianhao Wang,Yongbin Wang,Runlong Hao,Han Wang,Yuhong Han 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
Carbon dioxide (CO2) was converted into formate (HCO2) in a catalytic reduction system mainlycomposed of potassium borohydride (KBH4) and nanoscale bimetallic nickel–copper alloy (NBN–C), inwhich, the average CO2 conversion efficiency of 41.92% was obtained under the optimal experimentalconditions, with a HCO2selectivity of 53.42%. Various characterization methods were employed toinvestigate the physicochemical properties of NBN–C and the results indicated that NBN–C was a coreshellmesoporous catalyst with key active sites containing Ni0 and Cu0, at which the catalytic reduction ofCO2 took place. The reaction mechanism was proposed based on these characterizations and relevantliteratures.
Jinghong Zhang,Dong Fu,Shu Qin Wang,Runlong Hao,Yixiao Xie 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
To cooperatively oxidize sulfite and reduce Cr(VI), this paper proposed a visible-light drivenphotocatalytic method, with using the photocatalysts of transition metals (Cu, Fe and Zn) dopedTiO2. The photocatalysts were characterized by means of XRD, BET, SEM and UV–vis. 0.5Cu-TiO2 exhibitedthe best performance, and the existing forms of Ti and Cu were Ti4+/Cu+ and/or Cu-O-Ti. Cu-dopingintroduced an energy level of Cu 3d which was useful in decreasing the band gap and increasing thevisible light utilization. Cu-doping also made the TiO2 grains well dispersed, increased the amount ofhydroxyl group, decreased the grain size and increased the specific surface area, which facilitated theadsorption process. Hydrothermal method (8 h and 180 C) favored the formation of anatase crystal. FT-IRresults revealed that most of produced Cr(III) and sulfate were adsorbed onto the catalyst. Kinetics resultssuggested that the rate constant for Cr(VI) removal was 5.05 10 3 min 1. The photo-produced electrons(e ) and holes (h+) contributed to the reduction of Cr(VI) and oxidation of sulfite, respectively; thecontinual consumption of e and h+ enhanced the separation of the h+-e pairs.