Tailoring the CdS surface structure for photocatalytic applications

Kumar, S. Girish; Kavitha, R.; Nithya, P.

doi:10.1016/j.jece.2020.104313

Cited by 46 publications

(19 citation statements)

References 306 publications

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“…At present, the conversion of solar energy into hydrogen through semiconductor photocatalysts has caused widespread concern 1–3 . As aexcellent photocatalyst, cadmium sulfide (CdS) has a band gap of 2.4eV 4 and high catalytic activity, 5 which can effectively capture visible light and promote water splitting to produce hydrogen 6,7 . However, the rapid recombination of photogenerated electrons and hole pairs in CdS photocatalysts and the high kinetics of surface hydrogen production severely limit their photocatalytic properties 8 .…”

Section: Introductionmentioning

confidence: 99%

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts

Qiao

Huang

et al. 2021

J Am Ceram Soc.

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As an effective semiconductor catalyst, cadmium sulfide (CdS) is used in the field of split water hydrogen evolution because of its suitable band gap (~2.4 eV), good photocatalysis activity. However, the rapid recombination of photogenerated electron–hole pairs limits the application of CdS in the field of catalytic hydrogen evolution. Here, we synthesize a CdS/MoS2 mixed‐dimensional heterojunction by a simple hydrothermal method. In this process, CdS nanoparticles were supported on MoS2 nanosheets, where MoS2 acts as a loading platform and co‐catalyst to improve the photocatalytic performance of CdS. A series of characterizations confirmed that CdS nanoparticles with a size of approximately 130 nm were uniformly grown on the surface of MoS2 nanosheets. Photoelectrochemical (PEC) tests show that this CdS/MoS2 mixed‐dimensional heterojunction has enhanced photocatalysis hydrogen evolution activity, which is due to the CdS/MoS2 mixed‐dimensional heterojunction can promote the separation of photogenerated electron–hole pairs and positive synergy of MoS2 nanosheets as a co‐catalyst. In addition, a new electrically assisted method is used to enhance the photocatalytic activity, and the photocatalytic performance of the CdS/MoS2 mixed‐dimensional heterojunction is improved by nearly four times when a voltage of 0.6 V is applied. This phenomenon is attributed to the fact that providing an appropriate voltage can further promote the separation of photogenerated electron–hole pairs and rapid carrier mobility, thereby effectively improve the photocatalytic activity of the photocatalyst. This work provides a good guiding significance for the design and construction of high‐performance hydrogen evolution catalysts.

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Section: Introductionmentioning

confidence: 99%

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts

Qiao

Huang

et al. 2021

J Am Ceram Soc.

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“…surface-to-volume ratio (Mukhopadhyay et al, 2005), which means that surface structure has a disproportionate effect on their overall properties (Kumar et al, 2020b). Nanomaterials have seen extensive use in organic optoelectronics (Pron et al, 2019); in battery (Pan et al, 2020) and battery-electrolyte research (Glynos et al, 2020); in medicine (Khan et al, 2020) and targeted therapies (Wang et al, 2020a), and in the development of novel chemical sensors (Torrinha et al, 2020).…”

Section: Nanomaterial-based Pesticide Detectionmentioning

confidence: 99%

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Levine

2021

Front. Chem.

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The detection of pesticides in real-world environments is a high priority for a broad range of applications, including in areas of public health, environmental remediation, and agricultural sustainability. While many methods for pesticide detection currently exist, the use of supramolecular fluorescence-based methods has significant practical advantages. Herein, we will review the use of fluorescence-based pesticide detection methods, with a particular focus on supramolecular chemistry-based methods. Illustrative examples that show how such methods have achieved success in real-world environments are also included, as are areas highlighted for future research and development.

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“…Metal chalcogenides have been in the spotlight for the past years due to their versatility and potential number of applications in the energy field (i.e., photovoltaics, imaging). In addition, chalcogenides semiconductors have been also studied for photocatalytic emerging applications in solar energy conversion and renewable energy development [34,[122][123][124][125][126][127][128][129].…”

Section: Evaluation Of Au-cds Anisotropic Heteronanostructuresmentioning

confidence: 99%

Recent Advances in the Design and Photocatalytic Enhanced Performance of Gold Plasmonic Nanostructures Decorated with Non-Titania Based Semiconductor Hetero-Nanoarchitectures

et al. 2020

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Plasmonic photocatalysts combining metallic nanoparticles and semiconductors have been aimed as versatile alternatives to drive light-assisted catalytic chemical reactions beyond the ultraviolet (UV) regions, and overcome one of the major drawbacks of the most exploited photocatalysts (TiO2 or ZnO). The strong size and morphology dependence of metallic nanostructures to tune their visible to near-infrared (vis-NIR) light harvesting capabilities has been combined with the design of a wide variety of architectures for the semiconductor supports to promote the selective activity of specific crystallographic facets. The search for efficient heterojunctions has been subjected to numerous studies, especially those involving gold nanostructures and titania semiconductors. In the present review, we paid special attention to the most recent advances in the design of gold-semiconductor hetero-nanostructures including emerging metal oxides such as cerium oxide or copper oxide (CeO2 or Cu2O) or metal chalcogenides such as copper sulfide or cadmium sulfides (CuS or CdS). These alternative hybrid materials were thoroughly built in past years to target research fields of strong impact, such as solar energy conversion, water splitting, environmental chemistry, or nanomedicine. Herein, we evaluate the influence of tuning the morphologies of the plasmonic gold nanostructures or the semiconductor interacting structures, and how these variations in geometry, either individual or combined, have a significant influence on the final photocatalytic performance.

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Tailoring the CdS surface structure for photocatalytic applications

Cited by 46 publications

References 306 publications

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Recent Advances in the Design and Photocatalytic Enhanced Performance of Gold Plasmonic Nanostructures Decorated with Non-Titania Based Semiconductor Hetero-Nanoarchitectures

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Tailoring the CdS surface structure for photocatalytic applications

Cited by 46 publications

References 306 publications

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS2 photocatalysts

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS2 photocatalysts

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Recent Advances in the Design and Photocatalytic Enhanced Performance of Gold Plasmonic Nanostructures Decorated with Non-Titania Based Semiconductor Hetero-Nanoarchitectures

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Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts

Electric‐assisted strategy enhances the photocatalytic performance of mixed‐dimensional CdS/MoS₂ photocatalysts