Insight into l-cysteine-assisted growth of Cu2S nanoparticles on exfoliated MoS2 nanosheets for effective photoreduction removal of Cr(VI)

Zhang, Yiming; Yang, Xiaoyan; Wang, Yonglin; Zhang, Peng; Liú, Dan; Li, Yongwei; Jin, Zhouzheng; Mamba, Bhekie B.; Kuvarega, Alex T.; Gui, Jianzhou

doi:10.1016/j.apsusc.2020.146191

Cited by 31 publications

(10 citation statements)

References 62 publications

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“…Furthermore, PL was applied to further examine the charge transfer characteristics of Pt-TiO 2 compared to the pristine TiO 2 , as shown in Figure 6 b. The spectra of pure TiO 2 showed higher PL intensity of the peak emission, indicating the higher charge recombination rate [ 78 ]. It can be noted that the presence of metals decorated on the TiO 2 surface can enhance the photocatalytic reduction of CO 2 by inhibiting the recombination rate [ 76 ].…”

Section: Resultsmentioning

confidence: 99%

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

et al. 2022

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The photocatalytic reduction of carbon dioxide (CO2) into value-added chemicals is considered to be a green and sustainable technology, and has recently gained considerable research interest. In this work, titanium dioxide (TiO2) supported Pt, Pd, Ni, and Cu catalysts were synthesized by photodeposition. The formation of various metal species on an anatase TiO2 surface, after ultraviolet (UV) light irradiation, was investigated insightfully by the X-ray absorption near edge structure (XANES) technique. CO2 reduction under UV-light irradiation at an ambient pressure was demonstrated. To gain an insight into the charge recombination rate during reduction, the catalysts were carefully investigated by the intensity modulated photocurrent spectroscopy (IMPS) and photoluminescence spectroscopy (PL). The catalytic behaviors of the catalysts were investigated by density functional theory using the self-consistent Hubbard U-correction (DFT+U) approach. In addition, Mott–Schottky measurement was employed to study the effect of energy band alignment of metal-semiconductor on CO2 photoreduction. Heterojunction formed at Pt-, Pd-, Ni-, and Cu-TiO2 interface has crucial roles on the charge recombination and the catalytic behaviors. Furthermore, it was found that Pt-TiO2 provides the highest methanol yield of 17.85 µmol/gcat/h, and CO as a minor product. According to the IMPS data, Pt-TiO2 has the best charge transfer ability, with the mean electron transit time of 4.513 µs. We believe that this extensive study on the junction between TiO2 could provide a profound understanding of catalytic behaviors, which will pave the way for rational designs of novel catalysts with improved photocatalytic performance for CO2 reduction.

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Section: Resultsmentioning

confidence: 99%

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

et al. 2022

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“…The interaction mechanism of Cr(VI) on MoS 2 -based materials in molecular level was demonstrated by various advanced methods, such as SEM, TEM, XPS, FT-IR, EXAFS, and Mössbauer spectra (MBS). ,, The analysis of adsorption kinetic showed that the Cr(VI) removal on MoS 2 was a chemisorption process. Zhang et al demonstrated that 2-Cu 2 S-MoS 2 exhibited the outstanding photocatalytic activities for Cr(VI), because of the improved migration efficiency of photoinduced carriers derived from the coordination inner heterojunction interface (Figure C) . According to XPS analysis (Figure D), the adsorbed Cr(VI) can be reduced into Cr(III) by MoS 2 @Fe 3 O 4 composites .…”

Section: Environmental Applicationmentioning

confidence: 99%

“…Zhang et al demonstrated that 2-Cu 2 S-MoS 2 exhibited the outstanding photocatalytic activities for Cr(VI), because of the improved migration efficiency of photoinduced carriers derived from the coordination inner heterojunction interface (Figure 5C). 216 According to XPS analysis (Figure 5D), the adsorbed Cr(VI) can be reduced into Cr(III) by MoS 2 @Fe 3 O 4 composites. 208 Apart from adsorption and redox, the electrostatic interaction and outer-sphere surface complexation were also demonstrated on the removal of Cr(VI) on MoS 2 -based composites.…”

Section: Environmental Applicationmentioning

confidence: 99%

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Recent Advances in Two-Dimensional MoS₂ Nanosheets for Environmental Application

Ishag

2021

Ind. Eng. Chem. Res.

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Molybdenum disulfide (MoS2), as one of the most common two-dimensional (2D) metal sulfides, has been attracting much attention in the area of energy storage and environmental remediation, because of its fascinating properties. Although much research regarding the environmental application of MoS2 have been recently summarized, reports on the recent progress of the removal of various environmental pollutants on MoS2 are still scarce. Herein, we systematically summarize the efficient elimination of environmental contaminants (e.g., gas, organic, heavy metals, and radionuclides) on MoS2-based nanosheets. In addition, the interaction mechanisms (e.g., physical (hydrogen bonding, van der Waals forces), ion-exchange, chemical adsorption, and redox) of environmental contaminants on MoS2-based materials were elucidated in detail. Finally, the major challenges and future prospective on MoS2-based materials were presented. This review has important implication for the design of MoS2-based materials with high adsorption performance and strong redox capacity toward the removal of various environmental pollutants in actual application.

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“…Also, the MoS 2 /graphitic carbon nitride composite exhibited a notable performance toward heavy metals removal. The synthesis of the heterostructure MoS 2 /graphitic carbon nitride as a promising catalyst for removing U(VI) has been reported by (Zhang et al 2020a). The heterostructure advanced the charge transference and improving the separation potential of photogenerated electron-hole pairs.…”

Section: Mos 2 -Carbon Materialsmentioning

confidence: 99%

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

et al. 2021

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The world is currently facing critical water and energy issues due to the growing population and industrialization, calling for methods to obtain potable water, e.g., by photocatalysis, and to convert solar energy into fuels such as chemical or electrical energy, then storing this energy. Energy storage has been recently improved by using electrochemical capacitors and ion batteries. Research is actually focusing on the synthesis of materials and hybrids displaying improved electronic, physiochemical, electrical, and optical properties. Here, we review molybdenum disulfide (MoS2) materials and hybrids with focus on synthesis, electronic structure and properties, calculations of state, bandgap and charge density profiles, and applications in energy storage and water remediation.

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Insight into l-cysteine-assisted growth of Cu2S nanoparticles on exfoliated MoS2 nanosheets for effective photoreduction removal of Cr(VI)

Cited by 31 publications

References 62 publications

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

Recent Advances in Two-Dimensional MoS₂ Nanosheets for Environmental Application

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

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Insight into l-cysteine-assisted growth of Cu2S nanoparticles on exfoliated MoS2 nanosheets for effective photoreduction removal of Cr(VI)

Cited by 31 publications

References 62 publications

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

Insight into the Roles of Metal Loading on CO2 Photocatalytic Reduction Behaviors of TiO2

Recent Advances in Two-Dimensional MoS2 Nanosheets for Environmental Application

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

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Product

Resources

About

Recent Advances in Two-Dimensional MoS₂ Nanosheets for Environmental Application