2D CdS functionalized by NiS2-doped carbon nanosheets for photocatalytic H2 evolution

Yu, Bingxin; Chen, Xiaoming; Huang, Cunping; Yao, Weifeng

doi:10.1016/j.apsusc.2022.153259

Cited by 34 publications

(7 citation statements)

References 54 publications

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“…Combined with Cd 0.6 Zn 0.4 S, the surface area of TCP@CZS increases dramatically to 469 m 2 g –1 , indicating that the porous TCP is formed in the heterostructure. Despite the fact that TCP@CZS has a smaller BET surface area than that of TCP, the surface area of the composite is still higher than that of Cd 0.6 Zn 0.4 S and other Cd x Zn 1– x S-based catalysts. − The increased BET surface area, as well as a high ratio of the microporous structure, can offer plenty of active sites and have an important effect on photocatalytic performance.…”

Section: Resultsmentioning

confidence: 99%

Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

et al. 2023

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Solar-driven hydrogen (H2) generation from seawater exhibits great economic value in addressing the urgent energy shortage yet faces challenges from the severe salt-deactivation effect, which could result in the consumption of photoinduced charges and decomposition of catalysts. Herein, a triptycene-based polymer was coated on the surface of a Cd x Zn1–x S nanorod to form a core–shell heterojunction (TCP@CZS) by using the in situ Suzuki reaction for photocatalytic H2 production from water/seawater splitting. The introduction of TCP can provide a large surface area, enrich the active site, and boost charge transfer for the proton reduction reaction. Benefiting from it, optimal TCP@CZS indicated a H2 evolution rate of 93.88 mmol h–1 g–1 with Na2S/Na2SO3 in natural seawater under simulated solar light irradiation, which was 2.2 and 1.1 times higher than that of pure Cd0.6Zn0.4S and that in pure water, respectively. Besides, the apparent quantum efficiency (AQE) of TCP@CZS-3 under 420 nm light irradiation was 22.6% in seawater. This work highlights the feasibility of the triptycene-based porous organic polymer as an efficient catalyst for solar energy conversion in seawater.

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Section: Resultsmentioning

confidence: 99%

Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

et al. 2023

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“…Photocatalytic H 2 production using semiconductor photocatalysts is an eco-friendly technology for solar energy conversion [ 145 , 146 , 147 ]. Ding et al [ 148 ] reported the synthesis of a sequence of CDs decorated HCNS-C x (hollow g-C 3 N 4 spheres) with glucose and cyanamide as precursors.…”

Section: Applications Of Cdsmentioning

confidence: 99%

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Pundi

Chang

2022

Polymers

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Although there is significant progress in the research of carbon dots (CDs), some challenges such as difficulty in large-scale synthesis, complicated purification, low quantum yield, ambiguity in structure-property correlation, electronic structures, and photophysics are still major obstacles that hinder the commercial use of CDs. Recent advances in synthesis, modification, characterization, and applications of CDs are summarized in this review. We illustrate some examples to correlate process parameters, structures, compositions, properties, and performances of CDs-based materials. The advances in the synthesis approach, purification methods, and modification/doping methods for the synthesis of CDs are also presented. Moreover, some examples of the kilogram-scale fabrication of CDs are given. The properties and performance of CDs can be tuned by some synthesis parameters, such as the incubation time and precursor ratio, the laser pulse width, and the average molar mass of the polymeric precursor. Surface passivation also has a significant influence on the particle sizes of CDs. Moreover, some factors affect the properties and performance of CDs, such as the polarity-sensitive fluorescence effect and concentration-dependent multicolor luminescence, together with the size and surface states of CDs. The synchrotron near-edge X-ray absorption fine structure (NEXAFS) test has been proved to be a useful tool to explore the correlation among structural features, photophysics, and emission performance of CDs. Recent advances of CDs in bioimaging, sensing, therapy, energy, fertilizer, separation, security authentication, food packing, flame retardant, and co-catalyst for environmental remediation applications were reviewed in this article. Furthermore, the roles of CDs, doped CDs, and their composites in these applications were also demonstrated.

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“…Regrettably, most of them suffer from low visible-light absorption capacity, leading to poor photocatalytic H 2 production performance. Among all kinds of semiconductors, transition metal sulfides are considered quite promising photocatalysts because of their brilliant visible-light absorption. − As a representative of transition metal sulfides, CdS has been widely used in photocatalytic hydrogen evolution reaction (HER) because of its desired band gap (∼2.4 eV) and appropriate band edge position. , Particularly, one-dimensional (1D) CdS nanowires (NWs) have aroused great concern due to their inherent optical, electronic, and structural superiorities …”

Section: Introductionmentioning

confidence: 99%

“…14−16 As a representative of transition metal sulfides, CdS has been widely used in photocatalytic hydrogen evolution reaction (HER) because of its desired band gap (∼2.4 eV) and appropriate band edge position. 17,18 Particularly, one-dimensional (1D) CdS nanowires (NWs) have aroused great concern due to their inherent optical, electronic, and structural superiorities. 19 Nevertheless, severe photocorrosion and low photoelectron−hole pair separation efficiency seriously hinder the largescale application of CdS.…”

Section: Introductionmentioning

confidence: 99%

Cu₂MoS₄/CdS Nanosheet-Modified Nanowire Nanocomposites for Significantly Improved Visible Light-Driven Photocatalytic H₂ Evolution Activity

Zhao,

Wang,

et al. 2023

Energy Fuels

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The development of photocatalysts with high charge separation efficiency and visible-light-harvesting capacity is still a great challenge. In this work, we report a simple hydrothermal treatment to decorate the CdS nanowires (NWs) with co-catalyst Cu 2 MoS 4 nanosheets (NSs) for photocatalytic H 2 evolution reaction (HER). Especially when the molar ratio of Cu 2 MoS 4 to CdS is 3%, the Cu 2 MoS 4 /CdS shows excellent visible light-driven H 2 evolution activity (1967.83 μmol g −1 h −1 ), which is 18.8 times higher than that of pure CdS. Structural characterizations demonstrate a well-designed structure of the Cu 2 MoS 4 /CdS, in which Cu 2 MoS 4 NSs are tightly attached onto the CdS NWs to form a heterojunction. The optical property reveals that the 3%-Cu 2 MoS 4 /CdS nanocomposite displayed distinguished visible-light absorption capacity. Combined with the data analysis of the photoluminescence spectra, photocurrents, and electrochemical impedance spectra, it can be proved that there is effective separation of photogenerated electron−hole pairs in 3%-Cu 2 MoS 4 /CdS nanocomposite. All these factors synergistically boost the photocatalytic H 2 evolution performance of the Cu 2 MoS 4 /CdS, providing a new concept for the rational design of highly efficient visible-light-driven sulfide photocatalysts.

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2D CdS functionalized by NiS2-doped carbon nanosheets for photocatalytic H2 evolution

Cited by 34 publications

References 54 publications

Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Cu₂MoS₄/CdS Nanosheet-Modified Nanowire Nanocomposites for Significantly Improved Visible Light-Driven Photocatalytic H₂ Evolution Activity

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2D CdS functionalized by NiS2-doped carbon nanosheets for photocatalytic H2 evolution

Cited by 34 publications

References 54 publications

Triptycene-Based Polymer-Incorporated CdxZn1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Triptycene-Based Polymer-Incorporated CdxZn1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Recent Advances in Synthesis, Modification, Characterization, and Applications of Carbon Dots

Cu2MoS4/CdS Nanosheet-Modified Nanowire Nanocomposites for Significantly Improved Visible Light-Driven Photocatalytic H2 Evolution Activity

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Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Triptycene-Based Polymer-Incorporated Cd_xZn_1–xS Nanorod with Enhanced Interfacial Charge Transfer for Stable Photocatalytic Hydrogen Production in Seawater

Cu₂MoS₄/CdS Nanosheet-Modified Nanowire Nanocomposites for Significantly Improved Visible Light-Driven Photocatalytic H₂ Evolution Activity