Influence of solvent on the morphology and photocatalytic properties of ZnS decorated CeO2 nanoparticles

Abstract

Herein, we report a theoretical and experimental study on the photocatalytic activity of CeO 2 ZnS, and ZnS decorated CeO 2 nanoparticles prepared by a microwave-assisted solvothermal method. Theoretical models were established to analyze electron transitions primarily at the interface between CeO 2 and ZnS. As observed, the particle morphology strongly influenced the photocatalytic degradation of organic dye Rhodamine B. A model was proposed to rationalize the photocatalytic behavior of the prepared decorated systems taking into account different extrinsic and intrinsic defect distributions, including order-disorder effects at interfacial and intra-facial regions, and vacancy concentration. V C 2014 AIP Publishing LLC.

Optical and structural investigation of ZnO@ZnS core–shell nanostructures

“…The experimental procedure to decoration with ZnS was performed according to our recent work of Raubach et al [30], previously synthesized ZnO powder (0.017 mol) was dispersed in 25 mL of EG or water generating solutions 1EG and 1W respectively. Then, 0.017 mol of Zinc acetate dehydrate [Zn (CH 3 COO) 2 2H 2 O] and 0.03 mol of thiourea were dissolved in 75 mL of EG or water generating solutions 2EG and 2W respectively.…”

Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content

“…Cerium dioxide (CeO 2 , ceria) [1] is a technologically important ceramic material used in various fields in the past few years, such as gas sensors [2], fuel cells [3], polishing materials [4], phosphors [5], energy storage materials [6], catalysts [7][8][9] and for which the use of nanocrystalline powders is an important factor. Several methods have been developed to prepare ultrafine CeO 2 powder, including conventional hydrothermal [4,10], co-precipitation [4], polymeric precursor [11], flow method [12], organometallic decomposition [13], microwave-assisted heating [14].…”

3C-SiC/ZnS heterostructured nanospheres with high photocatalytic activity and enhancement mechanism

“…One strategy is to dope the materials with metallic or non-metallic ions such as N, Ni, Cu, Pb, and Au 4-8 and the other is to incorporate nanocrystalline semiconductors with a narrow band gap or quantum dots such as CeO 2 , N 2 O, and CuS. [9][10][11] These modified photocatalysts have been shown to enhance absorption of solar energy by promoting the generation of photoinduced electrons and holes and suppressing direct recombination of charge carriers.…”

“…C Among the various semiconductor photocatalysts for pollutant degradation and water splitting, zinc sulfide (ZnS) is one of the most popular and has been studied extensively because it possesses a band structure tunable by doping and the proper negative reduction potential. [1][2][3][4][5][6][7][8][9][10][11] Similar to TiO 2 , bulk ZnS possesses wide bandgaps of 3.72 (zinc-blende) and 3.77 eV (wurtzite), 4,5 which hamper efficient use of solar energy. Hence, studies have been carried out to modify/modulate the band structure.…”