One-step synthesis of CdS nanoparticles/MoS 2 nanosheets heterostructure on porous molybdenum sheet for enhanced photocatalytic H 2 evolution

Nanocomposites composed of one-dimensional (1D) CdS nanowires (NWs) and 1T-MoS 2 nanosheets have been fabricated through a two-step solvothermal process. 5 mol% of MoS 2 loading results in the best optical properties, photoelectrochemical (PEC) as well as photocatalytic activities for hydrogen evolution reaction (HER). Compared with pure CdS NWs, the optimized nanocomposite shows 5.5 times enhancement in photocurrent and 86.3 times increase for HER in the presence of glucose and lactic acid as hole scavengers. The enhanced PEC and HER activities are attributed to the intimate contact between MoS 2 and CdS that efficiently enhances charge carrier separation. In addition, ultrafast transient absorption (TA) measurements have been used to probe the charge carrier dynamics and gain deeper insight into the mechanism behind the enhanced PEC and photocatalytic performance.

show abstract

“…Fig. 4a shows the XPS survey spectra of MoS 2 , CdS and 5%-MoS 2 /CdS samples, respectively [27,34,35]. The higher binding energy (Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Wang

Naghadeh

et al. 2018

Sci. China Mater.

View full text Add to dashboard Cite

show abstract

“…As is shown in the Figure (d), we can observe Mo 4+ 3d 3/2 and Mo 4+ 3d 5/2 of MoS 2 located at 231.2 eV and 228.05 eV and the S 2 s peak located at 226.74 eV is also a typical feature of MoS 2 . Meanwhile, we can also see the doublet peaks at 235.5 eV and 232.45 eV assigned to Mo 6+ 3d 3/2 and Mo 6+ 3d 5/2 , which can be attributed to its exposure to the air . The XPS analysis provides strong evidence for the presence of CdS@MoS 2 composite.…”

Section: Resultsmentioning

confidence: 76%

Novel Method of MoS₂ Decorated CdS Core‐shell Nano‐Heterojunctions for Highly Efficient and Stable Hydrogen Generation

Zhang

Sun

et al. 2019

ChemistrySelect

View full text Add to dashboard Cite

Exploitation of efficient and stable photocatalyst for water splitting is pressing to solve the energy crisis. Four CdS@MoS 2 nano-heterojunctions were prepared by a single precursor thermal decomposition combined with one-step hydrothermal method. The morphology of the prepared samples is spherical and has obvious core-shell structure interface. The photocurrent of CdS@MoS 2 -2 wt% is the largest, which is more over 40 times that of the pure CdS. In addition, CdS@MoS 2 -2 wt% had superior photocatalytic H 2 generation activity (20.23 mmol g À 1 h À 1 ) without any noble metal as a cocatalyst under visible light and show marked photocatalytic durability after a continuous test for 16 hours. This work provides a new insight for the design of core-shell nano-heterojunctions for other metal sulfide composites.

show abstract

“…The two main peaks located at 162.1 and 163.1 eV correspond to S 2p 3/2 and 2p 1/2 , respectively, derived from MoS 2 . The other two extra sulfur peaks are deconvoluted at 164.5 and 168.7 eV, which are assigned to S 2 2− ligands of MoS 2 (or CoS 2 ) and the S 6+ species in sulfate groups (SO 4 2− ), respectively . The high‐resolution spectrum of Co 2p are shown in Figure e. The two main peaks located at 779.2 and 794.1 eV could be assigned to Co 2p 3/2 and Co 2p 1/2 , respectively, corresponding to the Co−S bond in CoS 2 .…”

Section: Resultsmentioning

confidence: 98%

Hierarchical Tubular Architecture Constructed by Vertically Aligned CoS₂‐MoS₂ Nanosheets for Hydrogen Evolution Electrocatalysis

Cai

Lin

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

Developing efficient electrocatalystsf or the hydrogen evolutionr eaction( HER) is crucial for establishing as ustainable and environmentally friendly energy system, but it is still ac hallenging issue. Herein, hierarchical tubular-structured CoS 2 -MoS 2 /C as efficient electrocatalysts are fabricated through au nique metal-organic framework (MOF) mediated self-sacrificial templating. Core-shell structured MoO 3 @ZIF-67 nanorods are used both as ap recursor and as acrificial template to form the one-dimensionalt ubular heterostructure where vertically aligned two-dimensional CoS 2 -MoS 2 nanosheetsa re formed on the MOF-derived carbon tube. Trace amountso fn oble metals( Pd, Rh, and Ru) are success-fully introduced to enhancet he electrocatalytic property of the CoS 2 -MoS 2 /C nanocomposites. The as-synthesized hierarchicalt ubular heterostructures exhibit excellent HER catalytic performance owing to the merits of the hierarchical hollow architecture with abundantly exposed edges and the uniformly dispersed active sites. Impressively, the optimal Pd-CoS 2 -MoS 2 /C-600 catalyst delivers ac urrent density of 10 mA cm À2 at al ow overpotential of 144 mV and as mall Ta fel slope of 59.9 mV/dec in 0.5 m H 2 SO 4 .O verall,t his MOFmediated strategy can be extended to the rational design and synthesis of other hollow heterogeneousc atalysts for scalable hydrogen generation.[a] Dr.

show abstract

One-step synthesis of CdS nanoparticles/MoS 2 nanosheets heterostructure on porous molybdenum sheet for enhanced photocatalytic H 2 evolution

Cited by 193 publications

References 33 publications

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Novel Method of MoS₂ Decorated CdS Core‐shell Nano‐Heterojunctions for Highly Efficient and Stable Hydrogen Generation

Hierarchical Tubular Architecture Constructed by Vertically Aligned CoS₂‐MoS₂ Nanosheets for Hydrogen Evolution Electrocatalysis

Contact Info

Product

Resources

About

One-step synthesis of CdS nanoparticles/MoS 2 nanosheets heterostructure on porous molybdenum sheet for enhanced photocatalytic H 2 evolution

Cited by 193 publications

References 33 publications

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Enhanced photoelectrochemical and photocatalytic activities of CdS nanowires by surface modification with MoS2 nanosheets

Novel Method of MoS2 Decorated CdS Core‐shell Nano‐Heterojunctions for Highly Efficient and Stable Hydrogen Generation

Hierarchical Tubular Architecture Constructed by Vertically Aligned CoS2‐MoS2 Nanosheets for Hydrogen Evolution Electrocatalysis

Contact Info

Product

Resources

About

Novel Method of MoS₂ Decorated CdS Core‐shell Nano‐Heterojunctions for Highly Efficient and Stable Hydrogen Generation

Hierarchical Tubular Architecture Constructed by Vertically Aligned CoS₂‐MoS₂ Nanosheets for Hydrogen Evolution Electrocatalysis