Highly efficient 3D-ZnO nanosheet photoelectrodes for solar-driven water splitting: Chalcogenide nanoparticle sensitization and mathematical modeling

Inverted Configuration of Cu(In,Ga)S2/In2S3 on 3D-ZnO/ZnSnO3 Bilayer System for Highly Efficient Photoelectrochemical Water Splitting

“…UV–vis absorption spectra depicted in Figure A show the changes in light absorption ability after deposition of ZTO, CIGS, and In 2 S 3 layers on ZnO NS thin films. The ZTO layer on ZnO NS slightly decreases the light absorption in the UV–visible region, possibly owing to the disappearance of the ribbon-like ZnO structure, which has been theoretically and experimentally proven to be very effective in the light absorption ability in our previous study . On the other hand, the restricted light absorption within the UV range due to the wide bandgap of ZnO ( E g = 3.05 eV) and ZTO ( E g = 3.25 eV) semiconductors have been intensified by introducing a CIGS absorber layer ( E g = 1.24 eV) through the entire UV–vis region.…”

“…3D ZnO NS thin films have been manufactured on FTO-coated glass substrates using the hydrothermal chemical bath deposition method as in the previously reported procedure. , Prior to use, all the substrates have been cleaned thoroughly via ultrasonication in alconox water, deionized water, acetone, and isopropyl alcohol for 10 min each and dried with a N 2 gas flow. The clean FTO substrates have been subjected to another sonication process in an aqueous solution containing 1.0 M KOH aqueous and 60 mL of isopropyl alcohol for 3 min and in distilled water for 10 min to provide a hydrophilic surface.…”

“…Most importantly, for the fabrication of thin films, easily applicable and cost-effective methods such as CBD and ultrasonic spray pyrolysis (USP) have been adopted to build the inverted configuration of the photoelectrodes. Both methods are known as highly effective and facile solution-based processes for thin film fabrication and conveniently form various nanostructured materials with desired compositions and thicknesses. − …”

Assembly and Photocatalytic Degradation Activity of Spherical ZnO/CdSe Heterostructures on Flexible Carbon Cloth Substrates

“…The calculated O L and O V peak area ratios of ZnO–CC, Z10CdSe–CC, Z20CdSe–CC, and Z30CdSe–CC were 0.362, 1.564, 0.665, and 0.651, respectively. The increased intensity of O V was ascribed to the formation of ZnO/CdSe heterostructure resulting in sensitization [ 24 ]. The two peaks located at 404.7 and 411.4 eV, as shown in Figure 2 c, were attributed to Cd 3d 5/2 and Cd 3d 3/2 , respectively, which are characteristic of typical Cd 2+ ions [ 25 ].…”

Enhanced Photocatalytic Activity of ZnO–CdS Composite Nanostructures towards the Degradation of Rhodamine B under Solar Light

“…Due to their large bandgap and rapid recombination of photoinduced electron-hole (e − /h + ) pairs, it is challenging to attain the required photocatalytic performance from pure ZnO NPs [4]. By connecting ZnO NPs with narrow bandgap semiconductors, the construction of binary or ternary composite nanostructures is an efficient method to address the limitations of ZnO NPs [5][6][7][8][9].…”