Controllable growth of Cu–Bi co-doped ZnO nanospheres on cotton fabrics and a study on their photocatalytic performance in visible light

Abstract

Cu–Bi co-doped ZnO nanospheres were obtained by adopting Bi and Cu to dope ZnO to improve their photocatalytic performance in the visible region.

Insights into ZnO-based doped porous nanocrystal frameworks

“…The Cu–Bi codoped ZnO nanospheres were synthesized by sol–gel-assisted hydrothermal method. 79 From the XRD pattern, the doping of Bi and Cu separately showed a lower angle and higher angle diffraction peak shift owing to the respective higher and small size, compared to Zn size. This is attributed to the expansion and contraction of the ZnO lattice during Bi and Cu substitution, respectively.…”

Antibacterial and Photocatalytic Coatings Based on Cu-Doped ZnO Nanoparticles into Microcellulose Matrix

“…For E g evaluation, the absorption coefficient was calculated using the following Equation (1) [ 40 ]: where d is the film thickness, T is the transmittance and R reflectance of the ZnO 1D nanostructured thin films. The E g values were calculated from the dependence of absorption coefficient vs. the photon energy, hν, based on the following Equation (2) [ 19 , 20 , 21 , 41 ]: where A is a parameter that depends on the transition probability.…”

“…Thus, the cotton fabric treated with 0D particles (26 nm) showed high antimicrobial efficiency and those with 1D nanostructures exhibited the highest UV protection [ 19 ]. The control of semiconductor MONPs’ size and shape can be achieved by using surfactants or doping with metallic elements, such as Cu, Mn, Fe, etc., which allow tuning their band gap energy and, subsequently, controlling and enhancing their functional efficiency [ 7 , 20 , 21 , 22 , 23 ]. Composites based on micro/nanocellulose containing ZnO and CuO, but also TiO 2 , MgO or Fe 2 O 3 were synthesized and studied to replace antibiotics as antimicrobial agents against resistive bacteria [ 8 ].…”