Ubiquitous quantum dot-sensitized nanoporous film for hydrogen production under visible-light irradiation

Abstract

To develop the efficient photocatalytic hydrogen production device, tin monosulfide (SnS) quantum dots (QDs) were deposited onto a nanoporous TiO 2 electrode by the successive ionic layer adsorption and reaction (SILAR) method. When Pt nanoparticles as cocatalysts were modified at the interface between the electroconductive glass substrate and nanoporous SnS QDs/TiO 2 layer, hydrogen molecules were produced under visible-light irradiation without applying a bias potential. In addition, the size and color of SnS QDs could be tailored using SILAR method, and the optimal structure of the SnS QDs was determined for efficient photocurrent generation and hydrogen production. The photocatalysis device developed in the present study was constructed as a simple single plate consisting of non-toxic elements.

Energy Transfer with Semiconductor Quantum Dot Bioconjugates: A Versatile Platform for Biosensing, Energy Harvesting, and Other Developing Applications

“…For example CoS x QDs have been integrated into TiO 2 spheres increasing H 2 production 35-fold to 838 μmol g –1 h –1 . Similarly QDs can be integrated into TiO 2 films, , nanorod and nanotube arrays, , and molecular sieves . A slightly different approach utilized hematite as the photoelectrode since it is a porous material with a medium band gap between QDs and TiO 2, which can potentially improve charge transport in the system and increase overall H 2 production .…”

A metal sulfide photocatalyst composed of ubiquitous elements for solar hydrogen production

“…We loaded SnS QDs onto mesoporous TiO 2 electrodes using the successive ionic layer adsorption and reaction (SILAR) method, 29,30 and SnS 2 particles were loaded onto TiO 2 electrodes using a hydrothermal reaction. 31 Detailed experimental procedures are described in the ESI.…”

One-pot synthesis optimization of thiol-capped SnS and SnS/ZnS QDs for photocatalytic degradation of Rhodamine 6G

“…Since the bandgap of ZnS (3.6 eV) entirely covers that of SnS (1.5 eV), ZnS was selected as the shell material to (i) convert the QDs to type 1 core/shell structure and (ii) eliminate lattice mismatch [ [29] , [30] ]. The pH was regularly measured and kept at 3 for ideal reaction conditions throughout the shelling process.…”

“…Compared to commercial catalysts, SnS exhibits several advantages, including tunability for optimizing the photocatalytic process, enhanced stability for longevity and effectiveness of the QDs over time, and low-cost visible-light-driven photocatalysis [ 14 ]. However, a literature survey has revealed that very few works [ [15] , [16] , [17] ] have been reported on applying SnS QDs for the photocatalytic degradation of Rhodamine 6G. Additionally, to the best of our knowledge, there has been no report on (i) the effect of synthetic solvent on the photoluminescence and absorption behavior of SnS-based QDs and (ii) the effect of ZnS coating on degradation efficiency.…”