One dimensional hierarchical nanostructures composed of CdS nanosheets/nanoparticles and Ag nanowires with promoted photocatalytic performance

Abstract

Constructing one-dimensional (1D) hierarchical photocatalysts is deemed to be central to promoting photocatalytic capacity. In this paper, 1D hierarchical structures composed of CdS nanosheets/nanoparticles on Ag nanowires (denoted as 1D Ag@CdS core-shell hierarchical hetero-nanowires) have been fabricated via a wet-chemistry approach at low temperature. The optimization of the synthetic parameters indicates that the amounts of Cd(NO 3 ) 2 ·4H 2 O and thiourea play important roles in the construction of the 1D hierarchical structures. The as-prepared 1D hierarchical Ag@CdS core-shell hetero-nanowires exhibit efficient photocatalytic performance in both methyl orange (MO) degradation (degrade 96% of MO within 240 min) and hydrogen generation (73.5 μmol h -1 ) from water splitting due to the unique hybrid nano-architecture. It is expected that this Ag@CdS hierarchical nanostructure could have potential in solar energy conversion and this fabrication technique could be used as a reference to design other 1D metal@semiconductor core-shell heteronanowires. Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsXiong, J., Du, X., Cheng, G., Yang, H., Chen, J., Dou, S. & Li, Z. (2018 ) from water splitting due to the unique hybrid nanoarchitecture. It is expected that this Ag@CdS hierarchical nanostructure could have potential in solar energy conversion and this fabrication technique could be used as a reference to design other 1D metal@semiconductor core-shell heteronanowires.

Enhanced photocatalytic activity of ZnO–NiO nanocomposites synthesized through a facile sonochemical route

“…5c). These correspond to the d-d transitions of NiO [8]. These peaks are present in the spectra of composite samples (Fig.…”

“…This technique is complementary to the conventional approaches of waste water treatment such as filtration and sedimentation [1]. Wide band-gap semiconductors such as TiO 2 , ZnO, SnO 2 , WO 3 , Fe 2 O 3 , CdS and NiO are some of the most actively investigated systems as photocatalysts for water purification [2][3][4][5][6][7][8][9][10][11].…”

Core–Shell Nanophotocatalysts: Review of Materials and Applications

“…1D hierarchical Ag@CdS nanostructures were synthesized by a wet-chemistry route at low temperature by the addition of Cd­(NO 3 ) 2 ·4H 2 O, thiourea, and NH 3 ·H 2 O to a freshly preprepared aqueous Ag solution. The PCA evaluated via H 2 evolution and MO degradation exhibited high activity, with the formation of • O 2 – being the main ROS under visible light because of the fast transfer of charge carriers …”

“…The PCA evaluated via H 2 evolution and MO degradation exhibited high activity, with the formation of • O 2 − being the main ROS under visible light because of the fast transfer of charge carriers. 49 3.4.4. Ag@Cu 2 O Nanostructures.…”

“…Among them, dyes have been studied extensively because of their ease of monitoring by simple, inexpensive, and accessible ultraviolet–visible (UV–vis) techniques, as exemplified by rhodamine B (RhB), − methylene blue (MB), − methyl orange (MO), − ,− and crystal violet . Other major appliances of CS-based materials comprise H 2 generation, ,− water splitting, − oxidation of alcohols, − and solar-fuel production . Herein, recent developments pertaining to the application of CS nanophotocatalysts are deliberated, focusing on important challenges and future perspectives.…”