One-pot hydrothermal synthesis of MoS2-modified Mn0.5Cd0.5S solid solution for boosting H2production activity under visible light

Zeng, Peng; Luo, Jiang; Wang, Jinming; Peng, Tianyou

doi:10.1039/c8cy02266f

Cited by 39 publications

(13 citation statements)

References 55 publications

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“…As shown in Fig. 2f, the lattice fringe of 0.240 nm was attributed to the (102) planes of Mn0.2Cd0.8S solid solution 62 , while the lattice fringe of 0.264 nm can be ascribed to Ti3C2 NSs.…”

Section: The Structure and Morphologymentioning

confidence: 87%

Constructing 1D/2D Schottky-Based Heterojunctions between Mn0.2Cd0.8S Nanorods and Ti3C2 Nanosheets for Boosted Photocatalytic H2 Evolution

姜志民¹,

陈晴²,

郑巧清³

et al. 2020

Acta Physico Chimica Sinica

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Sustainable photocatalytic H2 evolution has attracted extensive attention in recent years because it can address both energy shortage and environmental pollution issues. In particular, metal sulfide solid-solution photocatalysts have been widely applied in photocatalytic hydrogen generation owing to their excellent light harvesting properties, narrow enough band gap, and suitable redox potentials of conduction and valance bands. However, it is still challenging to develop low-cost and high-efficiency sulfide solid-solution photocatalysts for practical photocatalytic hydrogen evolution. Recently, 1D MnxCd1−xS nanostructures have shown superior light absorption, charge separation, and H2-evolution activity owing to their shortened diffusion pathway of carriers and high length-to-diameter ratios. Thus, 1D MnxCd1−xS nanostructures have been applied in photocatalytic H2 evolution. However, a single MnxCd1−xS photocatalyst still has some disadvantages for photocatalytic H2 evolution, such as the rapid recombination of photogenerated electron-hole pairs and low quantum efficiency. Herein, to further boost the separation of photogenerated charge carriers and H2-evolution kinetics, an in situ solvothermal method was used to synthesize the 1D/2D Schottkybased heterojunctions between the Mn0.2Cd0.8S nanorods (MCS NRs) and Ti3C2 MXene nanosheets (NSs). Furthermore, various characterization methods have been used to investigate the crucial roles and underlying mechanisms of metallic Ti3C2 MXene NSs in boosting the photocatalytic H2 evolution over the Mn0.2Cd0.8S nanorods. X-ray Diffraction (XRD), Transmission Electron Microscope (TEM), High Resolution Transmission Electron Microscopy (HRTEM), element mapping images, and X-ray Photoelectron Spectroscopy (XPS) results clearly demonstrate that hybrid low-cost Schottky-based heterojunctions have been successfully constructed for practical applications in photocatalytic H2 evolution. Additionally, the photocatalytic hydrogen evolution reaction (HER) was also carried out in a mixed solution of Na2SO3 and Na2S using as the sacrificial agents. The highest hydrogen evolution rate of the optimized 1D/2D Schottky-based heterojunction is 15.73 mmol•g −1 •h −1 , which is 6.72 times higher than that of pure MCS NRs (2.34 mmol•g −1 •h −1 ). An apparent quantum efficiency of 19.6% was achieved at 420 nm. The stability measurements of the binary photocatalysts confirmed their excellent photocatalytic stability for practical applications. More interestingly, the UV-Vis diffuse reflection spectra, photoluminescence (PL) spectrum, transient photocurrent responses, and Electrochemical Impedance Spectroscopy (EIS) Nyquist plots clearly confirmed the promoted charge separation between the MCS NRs and Ti3C2 MXene NSs. The linear sweep voltammetry also showed that the loading of MXene cocatalysts could greatly decrease the overpotential of pure MCS NRs, suggesting that the 2D Ti3C2 NSs could act as an electronic conductive bridge to improve the H2-evolution kinetics. In summary, these results show th...

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Section: The Structure and Morphologymentioning

confidence: 87%

Constructing 1D/2D Schottky-Based Heterojunctions between Mn0.2Cd0.8S Nanorods and Ti3C2 Nanosheets for Boosted Photocatalytic H2 Evolution

姜志民¹,

陈晴²,

郑巧清³

et al. 2020

Acta Physico Chimica Sinica

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“…In comparison, the absorption edge of PNIMCS occurs obviously red-shifted, indicating that PNIMCS has strong light absorption capacity, which may be attributed to phosphorylation. 17,19 Based on the UV-Vis DRS data, the E g is obtained by using Tauc formula. 11,42 The Eg for MCS and PNIMCS is 2.25 eV (Figure S4) and 2.00 eV (Figure 4B), respectively.…”

Section: Resultsmentioning

confidence: 99%

“…It is absorption edge is 580 nm. In comparison, the absorption edge of PNIMCS occurs obviously red‐shifted, indicating that PNIMCS has strong light absorption capacity, which may be attributed to phosphorylation 17,19 . Based on the UV‐Vis DRS data, the E g is obtained by using Tauc formula 11,42 .…”

Section: Resultsmentioning

confidence: 99%

“…6,59,60 Furthermore, combined with the equation E VB = E g + E CB, the PNIMCS valence band potential (E VB ) is 0.668 eV. 19,61 Finally, the possible mechanism of hydrogen production in pure water of PNIMCS is proposed. As shown in Figure 9, the separation of photogenerated h + and e À occurs under illumination, and e À migrates to the Ni 2 P nanosheets for the hydrogen evolution reaction.…”

Section: Resultsmentioning

confidence: 99%

“…to improve its photocatalytic hydrogen precipitation performance. It is worth noting that the improvement of the hydrogen evolution performance of Mn x Cd 1‐x S, whether modified with metal doping or a co‐catalyst, is ultimately achieved with the help of sacrificial agents 11,19 . Actually, photocatalysis pure water splitting is more meaningful.…”

Section: Introductionmentioning

confidence: 99%

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The preparation of 0D / 2D P‐doped Mn _x Cd _1‐x S / Ni ₂ P photocatalyst and its photocatalytic activity of pure water splitting for H ₂

Yan

Shi

2022

Intl J of Energy Research

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Summary The photocatalytic hydrogen evolution of MnxCd1‐xS in pure water has been achieved through suitable modification methods and efficient co‐catalysts. This article presents the photocatalytic performance and reaction mechanism of a Ni2P‐modified P‐doped MnxCd1‐xS photocatalyst (PNIMCS). It possesses admirable photocatalytic H2 evolution ability both in pure water and trapping agent solutions. The co‐catalysts Ni2P and P doping make a significant contribution in facilitating the PNIMCS photocatalytic pure water splitting to hydrogen reaction. They make the ECB of PNIMCS more negative, lower the overpotential of the hydrogen evolution reaction, and also promote the separation and transfer of photogenerated h+ and e−, thus improving the hydrogen evolution performance of PNIMCS.

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Amorphous CoB Modified Zn_xCd_1‐_xS to Construct Schottky Junction for Enhanced Photocatalytic Hydrogen Evolution

Li,

Wu,

Yang

et al. 2024

Advanced Sustainable Systems

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In this paper, nanosized ZnxCd1‐xS is synthesized by a simple hydrothermal method and modified by amorphous CoB. ZnxCd1‐xS/CoB Schottky heterojunction composite photocatalyst is reasonably designed. The adhesion of tiny ZnxCd1‐xS nanoparticles to irregular block CoB is more conducive to the dispersion of ZnxCd1‐xS and better interface connection between catalysts, thus further promoting the migration of photogenerated carriers, protecting the photocorrosion of ZnxCd1‐xS, and finally improving the efficiency of photocatalytic hydrogen production. The composite catalyst ZnxCd1‐xS/CoB‐20 means that the loading content of CoB is 20 wt%, and the photocatalyst has the highest catalytic efficiency under visible light, reaching 1494.09 µmol within 5 h. Through the characterization of XRD, XPS, electrochemical and optical properties of the catalyst, it is proved that the introduction of CoB can significantly inhibit the recombination of photogenerated electron holes and enhance the response to visible light. This study provides a feasible scheme for co‐catalysts to replace precious metal catalysts and effectively reduce ZnxCd1‐xS photocorrosion.

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One-pot hydrothermal synthesis of MoS₂-modified Mn_0.5Cd_0.5S solid solution for boosting H₂production activity under visible light

Abstract: MnxCd1−xS solid solutions are obtained, and Mn0.5Cd0.5S exhibits the best H2 production activity, which was further boosted by MoS2-loading.

Cited by 39 publications

References 55 publications

Constructing 1D/2D Schottky-Based Heterojunctions between Mn<sub>0.2</sub>Cd<sub>0.8</sub>S Nanorods and Ti<sub>3</sub>C<sub>2</sub> Nanosheets for Boosted Photocatalytic H<sub>2</sub> Evolution

Constructing 1D/2D Schottky-Based Heterojunctions between Mn<sub>0.2</sub>Cd<sub>0.8</sub>S Nanorods and Ti<sub>3</sub>C<sub>2</sub> Nanosheets for Boosted Photocatalytic H<sub>2</sub> Evolution

The preparation of 0D / 2D P‐doped Mn _x Cd _1‐x S / Ni ₂ P photocatalyst and its photocatalytic activity of pure water splitting for H ₂

Amorphous CoB Modified Zn_xCd_1‐_xS to Construct Schottky Junction for Enhanced Photocatalytic Hydrogen Evolution

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One-pot hydrothermal synthesis of MoS2-modified Mn0.5Cd0.5S solid solution for boosting H2production activity under visible light

Abstract: MnxCd1−xS solid solutions are obtained, and Mn0.5Cd0.5S exhibits the best H2 production activity, which was further boosted by MoS2-loading.

Cited by 39 publications

References 55 publications

Constructing 1D/2D Schottky-Based Heterojunctions between Mn<sub>0.2</sub>Cd<sub>0.8</sub>S Nanorods and Ti<sub>3</sub>C<sub>2</sub> Nanosheets for Boosted Photocatalytic H<sub>2</sub> Evolution

Constructing 1D/2D Schottky-Based Heterojunctions between Mn<sub>0.2</sub>Cd<sub>0.8</sub>S Nanorods and Ti<sub>3</sub>C<sub>2</sub> Nanosheets for Boosted Photocatalytic H<sub>2</sub> Evolution

The preparation of 0D / 2D P‐doped Mn x Cd 1‐x S / Ni 2 P photocatalyst and its photocatalytic activity of pure water splitting for H 2

Amorphous CoB Modified ZnxCd1‐xS to Construct Schottky Junction for Enhanced Photocatalytic Hydrogen Evolution

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One-pot hydrothermal synthesis of MoS₂-modified Mn_0.5Cd_0.5S solid solution for boosting H₂production activity under visible light

The preparation of 0D / 2D P‐doped Mn _x Cd _1‐x S / Ni ₂ P photocatalyst and its photocatalytic activity of pure water splitting for H ₂

Amorphous CoB Modified Zn_xCd_1‐_xS to Construct Schottky Junction for Enhanced Photocatalytic Hydrogen Evolution