Solar hydrogen generation over CdS incorporated in Ti-MCM-48 mesoporous materials under visible light illumination

Peng, Rui; Wu, Chia-Ming; Baltrušaitis, Jonas; Dimitrijević, Nada M.; Rajh, Tijana; Koodali, Ranjit T.

doi:10.1016/j.ijhydene.2016.01.040

Cited by 19 publications

(10 citation statements)

References 75 publications

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“…Regarding an appropriate band gaps, another group of semiconductors with great application potential in photocatalytic H 2 generation are transition metal chalcogenides. Recently, CdS is one of the most studied materials [54,55,[137][138][139][140]; however, the toxic effects due to potential leaching of Cd 2+ have to be strongly considered, followed by others (MoS 2 , ZnS, ZnSe, CdSe) indicated in Figure 12, as mentioned in part related to water treatment [127].…”

Section: Transition Metal Chalcogenides-tiomentioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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Clean water and the increased use of renewable energy are considered to be two of the main goals in the effort to achieve a sustainable living environment. The fulfillment of these goals may include the use of solar-driven photocatalytic processes that are found to be quite effective in water purification, as well as hydrogen generation. H2 production by water splitting and photocatalytic degradation of organic pollutants in water both rely on the formation of electron/hole (e−/h+) pairs at a semiconducting material upon its excitation by light with sufficient photon energy. Most of the photocatalytic studies involve the use of TiO2 and well-suited model compounds, either as sacrificial agents or pollutants. However, the wider application of this technology requires the harvesting of a broader spectrum of solar irradiation and the suppression of the recombination of photogenerated charge carriers. These limitations can be overcome by the use of different strategies, among which the focus is put on the creation of heterojunctions with another narrow bandgap semiconductor, which can provide high response in the visible light region. In this review paper, we report the most recent advances in the application of TiO2 based heterojunction (semiconductor-semiconductor) composites for photocatalytic water treatment and water splitting. This review article is subdivided into two major parts, namely Photocatalytic water treatment and Photocatalytic water splitting, to give a thorough examination of all achieved progress. The first part provides an overview on photocatalytic degradation mechanism principles, followed by the most recent applications for photocatalytic degradation and mineralization of contaminants of emerging concern (CEC), such as pharmaceuticals and pesticides with a critical insight into removal mechanism, while the second part focuses on fabrication of TiO2-based heterojunctions with carbon-based materials, transition metal oxides, transition metal chalcogenides, and multiple composites that were made of three or more semiconductor materials for photocatalytic water splitting.

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Section: Transition Metal Chalcogenides-tiomentioning

confidence: 99%

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

et al. 2020

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“…Electron paramagnetic resonance (EPR) spectra of Eu 52 Ni 56− x Cd x /CdS‐3 under visible‐light irradiation were examined to elucidate the photoinduced electron injection process. Before irradiation, the Eu 52 Ni 56− x Cd x /CdS‐3 gave an intense signal at 1.922, which was attributed to the paramagnetic defect of CdS (Figure a) . An EPR signal with g of 2.003 was observed upon 30 min of irradiation, which is assigned to the paramagnetic Eu 2+ species .…”

Section: Methodsmentioning

confidence: 96%

Integration of Lanthanide–Transition‐Metal Clusters onto CdS Surfaces for Photocatalytic Hydrogen Evolution

et al. 2018

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Heterometallic lanthanide–transition‐metal (4f–3d) clusters with well‐defined crystal structures integrate multiple metal centers and provide a platform for achieving synergistic catalytic effects. Herein, we present a strategy for enhanced hydrogen evolution by loading atomically precise 4f–3d clusters Ln52Ni56 on a CdS photoabsorber surface. Interestingly, some Ni2+ ions in the clusters Ln52Ni56 were exchanged by the Cd2+ to form Ln52Ni56−xCdx/CdS composites. Photocatalytic studies show that the efficient synergistic multipath charge separation and transfer from CdS to the Eu52Ni56−xCdx cluster enable high visible‐light‐driven hydrogen evolution at 25 353 μmol h−1 g−1. This work provides the strategy to design highly active photocatalytic hydrogen evolution catalysts by assembling heterometallic 4f–3d clusters on semiconductor materials.

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“…The main peaks of this mesoporous between 2θ = 2°-3° can be seen clearly. The sharp peak at 2θ = 2.9° demonstrates the d211 diffraction of the MCM-48 cubic phase and peak at 2θ = 3.4° is related to the d220 re ection [15,16] and at 6.16°, 15.88°, 26.08°, and 30.7°c…”

Section: Physico-chemical Propertiesmentioning

confidence: 98%

n-Heptane Isomerization Activities of Pt Catalyst Supported On Micro/Mesoporous Composites

Ghaderi

Peyrovi

Parsafard

2021

Preprint

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Pt loaded on a series of MCM-48 and composites with HZSM-5, HY or TiO2 has been prepared and studied for n-heptane isomerization reaction at 200–350°C. The structural characterization, acid distribution and morphology of these catalysts were characterized by XRD, FT-IR, UV-Vis DRS, SEM, NH3-TPD, and nitrogen adsorption-desorption methods. These new catalysts have good ability for n-heptane isomerization. The ideal catalytic performance was observed on Pt/MCM48-HZSM5 catalyst.

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Solar hydrogen generation over CdS incorporated in Ti-MCM-48 mesoporous materials under visible light illumination

Cited by 19 publications

References 75 publications

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Recent Achievements in Development of TiO2-Based Composite Photocatalytic Materials for Solar Driven Water Purification and Water Splitting

Integration of Lanthanide–Transition‐Metal Clusters onto CdS Surfaces for Photocatalytic Hydrogen Evolution

n-Heptane Isomerization Activities of Pt Catalyst Supported On Micro/Mesoporous Composites

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