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"Hydrogen production using photocatalyst for water splitting is considered one of the most viable options to solve the energy problem. " Based on density functional theory results, the feasibility of CdS/SiI2 heterostructure as a photocatalyst is studied consistently. The measured results show that different styles of CdS/SiI2 heterostructure have a typical type-III direct bandgap with bandgap values ranging from 2. 08 to 2. 21 eV, which are closer to the intended bandgap for water-splitting. Not only the band alignment of type-II heterostructures, but also the built-in electric field created between the two monolayers can effectively drive carriers spatial separation, thus lowering the carrier recombination rate. The biaxial strain can vary the bandgap values and the band alignment to match various application requirements, as well as modulating the light absorption intensity and range.
Source link: https://doi.org/10.1016/j.rinp.2022.105636
"As photoanodes in photoelectrochemical water splitting devices, photoanodes have already been tested electrochemically produced nanoporous tin oxide films. " Hence, here we present for the first time an innovative method for sensitizing porous anodic SnO x films with another narrow band gap semiconductor. By simple one-step anodic oxidation of metallic Sn in 1 M NaOH, followed by further surface decoration with CdS by the successive ionic layer adsorption and reaction process, nanoporous tin oxide layers were obtained. In the visible range, such SnO x /CdS photoanodes displayed enhanced photoelectrochemical production in the visible range as compared to unmodified SnO x. ".
Source link: https://doi.org/10.3390/ma15113848
For the first time by chemical vapor deposition, one-dimensional Al-doped CdS nanobelts were synthesized. " All the NIR peaks correspond to Al ions' du2013d transition. The samples from 1. 097 u00d7 10u22126 to 2. 59 u22125 A, which indicates suitability for optoelectronic applications, such as nanoscale light sources and buffer layer materials in solar panels. ".
Source link: https://doi.org/10.1016/j.jsamd.2022.100464
Corning Eagle 2000 glass substrates were fabricated on Corning Eagle 2000 glass substrates using RF magnetron sputtering, allowing a wide range of substrate temperatures as deposition conditions. Each CdS film deposited at various substrate temperatures was found to be highly temperature dependent, with crystallographic structure, microscopic surface texture, and stoichiometric and optical properties. Based on a hexagonal wurtzite phase, the mature CdS thin films revealed a polycrystalline structure in which a cubic phase was mixed. With the increase in the substrate temperature, the apparent absorption edge revealed in the transmission spectrum changed from the long wavelength to the short wavelength region. Both CdS films grown at the temperatures of 450 °C and 500 'u00b0C demonstrated glass-like transmittance with virtually no interference fringes of light, resulting in wide bandgap values of 3. 09 ev and 4. 19 eV, respectively.
Source link: https://doi.org/10.3390/nano12101618
"Here, the effects of hydroxyl, carbonyl, and carboxyl groups of CDs on the mechanical, electronic, and optical characteristics of MoS 2 / CDsu2019 heterostructure were investigated by a first-principles research. The experimental results for monolayer MoS 2's calculated energy band structure and band gap were both consistent with the experimental measurements. After the manufacturing of MoS 2 / CDs and MoS 2 / CDs/u2013hydroxyl/carboxyl, the band gap in MoS 2 was evidently reduced, which helped to increase the light adsorption range. MoS 2 / CDsu2013carbonyl's band gap was marginally increased in comparison to that of monolayer MoS2. Functional groups of CDs can spontaneously bind on 2D-MoS 2 and result in a stable MoS 2 / CDs heterostructure. Notably, the carbonyl and carboxyl groups on the CDs evidently reduced the optical absorption intensity of the MoS 2 / CDs in the ultraviolet region. ".
Source link: https://doi.org/10.3390/catal12050456
"The impact of the synthesis technique on the CdS and Zn0. 2Cd0. 8S systems was investigated, as well as the effects of Zn's incorporation of Zn in the crystal lattice and its effect on hydrogen production from water division" is investigated. In the case of CdS pure, the crystallite size decreased with Zn incorporation in the crystal lattice from 8. 61 nm by a coprecipitation method to 4. 37 nm when the synthesis was assisted with sonochemistry, and crystallite sizes varied from 8. 92 nm to 3. 80 nm. "The PL findings show that tunability of band edge emission can be controlled by zinc concentration in the Zn0. 2Cd0. 8S nanoparticles. ".
Source link: https://doi.org/10.1155/2022/5567247
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