Beilstein J. Nanotechnol.2018,9, 740–761, doi:10.3762/bjnano.9.68
studied at a 200 °C reaction temperature. Apparently, the catalytic activity of the CuO/CNT catalyst was observed to rise as the CuOloading increased from 1 to 10 wt %. About 88.5% of NO was converted when 10 wt % of CuOloading was introduced into the CNT. Unfortunately, the NO conversion decreased as
the amount of CuOloading became higher than 10 wt %. It is surmised that the reduction in NO activity is mostly due to the aggregation of CuO particles on top of the CNT surface [54]. The catalytic performance of 10 wt % CuO/CNT was also studied over a 120 to 150 °C temperature window. The NO
Beilstein J. Nanotechnol.2016,7, 776–783, doi:10.3762/bjnano.7.69
the good crystallinity, morphology and proper amount of CuOloading, which functioned as reductive sites for selective formation of methanol. The reaction mechanism was also proposed and explained by band theory.
Keywords: CO2 reduction; CuOloading; isopropanol; NaTaO3 nanocubes; photocatalysis
% CuOloading on NaTaO3, respectively.
Catalyst characterization
The catalysts were characterized by X-ray diffraction (XRD, Bruke/D8-Advance, Cu Kα radiation, λ = 0.154056 nm) at a scanning rate of 4°/min ranging from 15° to 70°. The morphology was observed with a Hitachi S-4800 field emission scanning
affected by CuOloading. CuO was also not detected because the loading amount was relatively low [35].
SEM images of CuO–NaTaO3 nanocubes are shown in Figure 5. It can be seen that the surface of pure NaTaO3 nanocubes was flat and smooth (Figure 5a). With moderate loadings of 1 wt % and 2 wt % CuO, CuO