HF-based surface modification for enhanced photobiological and photochemical performance of ZnO and ZnO/CdS hierarchical structures

Quantum-dot sensitized hierarchical NiO p–n heterojunction for effective photocatalytic performance

“…Before the p-SILAR process, anionic and cationic precursors were synthesized by the method reported by Naeem et al 14 For CdS QDs deposition we have prepared 0.05 M solution of Cd (NO 3 ) 2 $4H 2 O in methanol as a cationic precursor as well as 0.05 M solution of Na 2 S$5H 2 O in D.I water and methanol keeping 1 : 1 ratio to make sure it is acting as an anionic precursor. 13,14 In order to prepare hierarchical NiO/CdS QDs p-n heterojunction we utilized already optimized recipes 14 (0.15 g of NiO powder) into the centrifuge tube and poured with 20 mL of cationic precursor. 13,14,37 Then it was centrifuged at 8000 revolutions per minute (rpm) for 5 minutes.…”

“…13,14 In order to prepare hierarchical NiO/CdS QDs p-n heterojunction we utilized already optimized recipes 14 (0.15 g of NiO powder) into the centrifuge tube and poured with 20 mL of cationic precursor. 13,14,37 Then it was centrifuged at 8000 revolutions per minute (rpm) for 5 minutes. Later, 20 mL of methanol was poured to remove loosely attached Cd-ions.…”

“…Large surface area characteristics play a vital role in dye degradation. 13,14 Hence, the conversion of low-dimensional nanostructures (0D, 1D, 2D) into three-dimensional (3D) superstructures acquires great attention because of their unique physical and chemical characteristics compared with low-dimensional nanostructures. 15,16 The applications-driven optical, photocatalytic, and electronic properties of nanomaterials are directly related to their morphology.…”

Characterization of undoped and doped CdS nano-thin films by ZnO for photocatalytic application

“…ZnO-CdS nanocomposite is a great contender for photocatalytic applications as a result of all these elements. For the fabrication of CdS thin films, several techniques have been reported, including electrodeposition [12], pulsed laser deposition [13], physical vapor deposition [14], vacuum evaporation [15], and near-space sublimation [16]. But to achieve precise control of temperature, high pressure, etc., all these technologies have complex requirements.…”