APPLIED CATALYSIS A-GENERAL
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2025
·
IF 4.8
Yonggang Lei,Yongchun Tong,Qingyun Wang,Yuqi Han,Xiaojuan Feng,Zhen Li,Shoubo Li,Kim Hoong Ng
A well-engineered heterojunction cocatalysts play a pivotal role in enabling efficient H 2 evolution over semiconductor materials. Herein, an effective cocatalyst derived from MoP/Mo 2 N heterostructure was proposed and incorporated to CdS for a drastically enhanced H 2 production from water under visible light irradiation. By optimizing catalytic formulation, the best-performing CdS@MoP/Mo 2 N(3 wt%) demonstrates a remarkable H 2 production rate of 10653 μmol h⁻¹g⁻¹ , representing an 18-fold enhancement compared to bare CdS. This remarkably high activity outperforms CdS enhanced by conventional noble metal cocatalysts (e.g., Ag, Au, Pt) and MoS x -based materials, underscoring the outstanding cocatalytic effect promised by MoP/Mo 2 N. In parallel, the optimized photocatalyst also achieved a remarkable stability for H 2 production over 9 consecutive cycles with a total irradiation time of 45 h, alongside a noticeably high apparent quantum efficiency (AQE) of 13.5 % upon irradiated by 420 nm-light. According to analysis, these enhanced performances are ascribed to the promoted interfacial charge transfer kinetics and significantly reduced hydrogen evolution overpotential of CdS@MoP/Mo 2 N(3 wt%), both of which contribute to the superior catalytic activity. Theoretical investigation also suggested a much-facilitated electron shuttling and proton desorption with MoP/Mo 2 N attached to CdS photocatalyst. Overall, this work demonstrates that our developed MoP/Mo 2 N heterostructure cocatalysts can effectively serve as alternatives to noble metals(Ag, Au, Pt) in solar-driven photocatalytic hydrogen production.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shuhe Chen,Yufen Liu,Taiyu Huang,Tao Liu,Siyuan Yang,Xin Cai,Qiongzhi Gao,Xiaosong Zhou,Feng Peng,Shengsen Zhang
Molybdenum carbide (MoC) has attracted significant attention as a cocatalyst for photocatalytic hydrogen evolution. However, facile and scalable methods to synthesize hollow MoC materials with high specific surface areas remain limited. Herein, hollow-structured MoC/N-doped carbon (MCN) cocatalysts were innovatively synthesized via high-temperature calcination of MoO3-containing polydopamine (MoO3/PDA) precursors. These MCN materials were subsequently coupled with CdS through a solvothermal process to construct composite photocatalysts (MCN/CdS, denoted as MCS). Under simulated sunlight irradiation (AM 1.5G), the optimized MCS catalyst achieved an exceptional photocatalytic hydrogen evolution rate of 26.4 mmol·g–1·h–1, which is 10.8 times higher than that of the benchmark Pt/CdS catalyst. The MCS catalyst also demonstrated outstanding stability, maintaining efficient hydrogen production after 20 h of continuous illumination. The superior performance of MCS stems from two key advantages of the MCN cocatalyst: (i) its high specific surface area enhances CdS dispersion and provides abundant active sites for hydrogen evolution; (ii) the N-doped carbon matrix broadens light absorption and facilitates charge carrier transport. This work introduces an effective approach for the rapid and mild synthesis of ultrahigh surface area hollow nanospherical transition-metal carbons, providing valuable insights for advanced photocatalytic systems.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
·
2025
·Vol. 64
·期 27
·e202425601
·
IF 16.9
Yuemei Li,Shi-Yu Guo,Hongfei Gu,Bingyu Wang,Peiwu Su,Xiuming Zhang,Haoqing Zhang,Shuping Zhang,Fanzhi Yang,Jia Liu,Qing-An Chen,Jiatao Zhang
Visible light photoredox catalysis has become a rapidly emerging area owing to its potential of using sunlight to tame previously hard-to-harness radicals for organic synthesis. At present, such a blueprint faces a significant challenge, namely how to accomplish thermodynamically demanding reactions with sunlight encompassing a wide range of low-energy photons. Here, we report a new reaction framework to overcome this bottleneck through decoupling the thermodynamic limits of photoreduction from photoexcitation. This is fulfilled based on the construction of a heterogeneous photocatalyst Cu@CdS possessing in situ-formed surficial polysulfide species (including S 3 •− and S 4 2− ), which can efficiently harvest solar energy via plasmonic absorption of Cu while manifest sufficient redox potential for activating inert aryl bromides/chlorides enacted by excited polysulfides. We demonstrate that this designed material composes a potent photoredox catalyst for efficient aryl cross-coupling, borylation, hydrogenation, as well as Birch-type dearomatization reactions, with good recyclability and stability. In particular, when exclusively using natural sunlight as an energy source, the product yield can still reach up to 90%. Our findings introduce a straightforward yet viable way to progress toward the century-long dream of leveraging natural sunlight to produce structurally complex organic molecules, just like plants on Earth. Graphical Chemists have long aspired to construct complex organic compounds the way that plants do by harnessing natural sunlight as an energy source. This study presents an advancement toward this goal via synergistic exploitation of the plasmonic absorption of Cu and the unique redox potentials of excited polysulfide species (S 3 •− and S 4 2− ) on semiconductor surfaces to decouple the thermodynamic limits of photoreduction from photoexcitation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Peng Yu,Juan Tan,Ronghao Zhuang,Jing Tang,Zhiguo Wang,Chun Zhang,Qiongchao Wang,Xinxin Xiao,Wei Huang
Reutilizing heavy metal enriched adsorbents into efficient photocatalysts for antibiotic removal is of great economic value. Herein, spent alkali-lignin biochar (ALB) with enriched Zn 2+ /Cd 2+ ions is valorized into ZnS-CdS/C photocatalyst via a simple vulcanization method. ZnS-CdS/C (3:1) exhibits a superior photocatalytic removal efficiency of 98.6 % for levofloxacin (LEV), with about 60 % of the initial value remained after four cycles. It also shows good photocatalytic removal efficiencies of 92.1 %, 95.4 % and 84.0 % for enrofloxacin, ciprofloxacin and tetracycline, respectively. Electron paramagnetic resonance (ESR) shows that the introduction of ZnS and CdS in ALB promotes the generation of oxygen vacancies and persistent free radicals (PFRs). The photocatalytic LEV removal mechanism of ZnS-CdS/C indicates that both the abundant PFRs and photogenerated electrons serve as electron donors, efficiently reducing dioxygen to superoxide free radicals (·O 2 - ). The ·O 2 - formed in the above two ways continuously degrade the LEV molecules. Finally, the biotoxicity and developmental toxicity of LEV degradation intermediates confirms that the ZnS-CdS/C degradation system can remove LEV effectively with reduced harm to the ecological environment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xu Jia,Zhiqi Song,Jiaqi Zhang,Jiaolong Qiao,Liuxue Zhang,Xiulian Wang,Shuyan Jiao,Guomin Yu
To enhance the hydrogen production efficiency and stability in photocatalysis, a ternary heterojunction composite CdS@Ce-MOF/g-C 3 N 4 was developed by in-situ growth of Ce-MOF and CdS on graphitic carbon nitride (g-C 3 N 4 ). The synthesized composite not only mitigated the photocorrosion of sulfides but also established a stepwise energy-level alignment and built-in electric field within the heterojunction. These structural advantages effectively facilitated the separation of photogenerated electron-hole pairs and suppress their recombination, thereby significantly improving photocatalytic hydrogen evolution performance. Under simulated sunlight irradiation, the composite exhibited a hydrogen production rate of 4953.125 μmol g −1 , which is 7 times higher than that of pristine g-C 3 N 4 . Moreover, the hydrogen evolution rate remained stable with negligible degradation after multiple cycling tests, demonstrating excellent durability. The CdS@Ce-MOF/g-C 3 N 4 composite, with its superior hydrogen generation capacity and robust stability in photocatalytic water splitting, provides a promising alternative for advancing research on high-performance photocatalysts.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-11
·
IF 5.3
Tian Li,Li Huiling,Han Pengfei,Ma Guangping,Wang Wenzhuo,Jiang Hanyue,Lu Juan
An electrochemiluminescence (ECL) sensor was constructed based on Ru(bpy) 3 2+ @Au and GO@CdS for the detection of tartrazine (TTZ). In the presence of the co-reactant TPrA, Ru(bpy) 3 2+ and CdS quantum dots (QDs) were used as dual luminophores to synergistically amplify the ECL signal of the sensor. Gold nanoparticles (Au NPs) enhanced the electron transport capability of the system and thereby amplified the ECL intensity. Graphene oxide (GO), as a carrier, has a special wrinkle-like structure that not only adsorbed a substantial amount of CdS QDs but also prevented their agglomeration. Additionally, a more sensitive detection method was established based on the quenching of the ECL signal, which occurred due to the interaction between Ru(bpy) 3 2+ and TTZ. A low detection limit (1.3 × 10 –13 mol·L −1 , S/N = 3) was obtained for TTZ concentrations ranging from 4.0 × 10 –13 to 4.0 × 10 –8 mol·L −1 . Finally, actual measurement results from three beverage samples demonstrated that the prepared sensors possess excellent practical capabilities for TTZ detection. Graphical
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ENERGY & FUELS
·
2023
·
IF 5.3
Yanfei Zhao,Qi Wang,Congrong Lu,Kuankuan Ren,Shiyan Liu,Chunhe Li,Wei-Dong Dou
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 Cu2MoS4 nanosheets (NSs) for photocatalytic H2 evolution reaction (HER). Especially when the molar ratio of Cu2MoS4 to CdS is 3%, the Cu2MoS4/CdS shows excellent visible light-driven H2 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 Cu2MoS4/CdS, in which Cu2MoS4 NSs are tightly attached onto the CdS NWs to form a heterojunction. The optical property reveals that the 3%-Cu2MoS4/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%-Cu2MoS4/CdS nanocomposite. All these factors synergistically boost the photocatalytic H2 evolution performance of the Cu2MoS4/CdS, providing a new concept for the rational design of highly efficient visible-light-driven sulfide photocatalysts.
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Solar RRL
·
2021
·Vol. 5
·期 9
·2100494
·
IF 8.582
Juntian Zhou,Ru Zhou,Jun Zhu,Ping Jiang,Lei Wan,Haihong Niu,Linhua Hu,Xi Yang,Jinzhang Xu,Baomin Xu
The cadmium sulfide (CdS) is a promising electron transport layer (ETL) material for perovskite solar cells (PSCs) due to its low photocatalytic activity toward perovskite materials under UV light. The critical problem responsible for the moderate performance of CdS-based PSCs is the parasitic light absorption of CdS, which drives researchers to deposit ultrathin ETLs. However, the ultrathin ETL often involves the undesirable shunt current leakage because of the direct contact between conducting substrate and perovskite layer. Herein, a fully low-temperature solution-processed colloidal SnO 2 -assisted CdS (S-CdS) ETL for planar CH 3 NH 3 PbI 3 PSCs is constructed. The detailed characterizations of morphological, optical, and energy levels confirm that the assistance of colloidal SnO 2 provides the ameliorated continuity, reduces surface roughness and superior wettability of ETLs for high-quality perovskite formation as well as the favorable cascade band structure for efficient charge transfer. The study of charge transfer mechanisms reveals that the S-CdS ETL effectively inhibits the shunt leakage, promotes the electron extraction and suppresses the charge recombination at the ETL/perovskite interface. Consequently, the S-CdS ETL-based PSCs deliver an appreciable efficiency of 16.26%, doubling that of conventional CdS-based devices. To the best of our knowledge, this value is the champion efficiency reported for CdS-based CH 3 NH 3 PbI 3 PSCs.
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Journal of Physical Chemistry C
·
2018
·
IF 4.484
Hao Wang,Huili Ye,Bihong Zhang,Faqiong Zhao,Baizhao Zeng
A ZnIn2S4/CdS photocatalyst was synthesized based on an electrostatic interaction mechanism and was used to construct a photoelectrochemical (PEC) sensor for the highly sensitive and selective detection of dopamine (DA). As CdS and ZnIn2S4 possessed overlapping band potentials, they could form a heterojunction, which was favorable for charge separation and PEC conversion. Thus, the ZnIn2S4/CdS composite showed better PEC properties and higher photocatalytic activity than pure ZnIn2S4 and CdS. When it was used for DA sensing in a weak alkaline solution, DA turned to polydopamine and acted as an effective electron acceptor to make the anodic photocurrent decrease. Owing to adopting this detection strategy, the interference of coexistent reductive species (i.e., electron donor) was avoided effectively. Under the optimized conditions, the photocurrent change was linear to DA concentration in the range from 0.3 to 300 μM, and the detection limit was 0.1 μM. The ZnIn2S4/CdS/indium tin oxide sensor was applied for the indirect detection of DA in urine samples, and it presented a good performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jiaqian Zhu,Yinghua Shen,Xiang Yu,Jia Guo,Yi Zhu,Yuanming Zhang
Immobilized CdS/BiOCl film photocatalysts were successfully synthesized by a facile two-step hydrothermal-hydrolysis method. The structures, morphologies, photocatalytic properties and reusabilities of the samples were studied. The photocatalytic activities of CdS/BiOCl were significantly improved compared with pure BiOCl. The photocatalytic activity of 6% CdS/BiOCl was the highest and 10 times higher than pure BiOCl, which was attributed to the enhanced visible light absorption and the higher separation of photogenerated carriers. Besides, 6% CdS/BiOCl also showed good recycling performance. A new photocatalytic mechanism, totally different from other mechanisms of BiOCl-based heterostructures , was revealed. It was part of electrons on the conducting band of CdS rather than the transferred electrons on the conducting band of BiOCl that oxidized O 2 into O 2 − , and O 2 − together with h + on the valence band of CdS degraded organic pollutants. BiOCl did not generate electrons and holes, but only served as the electron transferer as electrons on the conducting band of CdS transferred to the conducting band of BiOCl, facilitating the separation of hole-electron pairs. This work provided a good reference for design and synthesis of film photocatalysts and new insights into photocatalytic mechanisms for heterostructures.
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Nanoscale
·
2016
·Vol. 8
·期 45
·19161-19173
·
IF 7.76
Qingchi Xu,Jiaxin Zeng,Haiqing Wang,Xingyun Li,Jun Xu,Jianyang Wu,Guangcan Xiao,Fang-Xing Xiao,Xiangyang Liu
A facile and efficient ligand-triggered electrostatic self-assembly strategy has been developed to fabricate a series of Au/CdS nanosheet (Ns) (Au–CdS Ns) nanocomposites with varied weight addition ratios of Au nanoparticles (NPs) by judiciously utilizing the intrinsic surface charge properties of assembly units, through which uniform dispersion and controllable deposition of Au NPs on the CdS Ns were achieved. Versatile probe reactions including photocatalytic oxidation of an organic dye pollutant, selective photocatalytic reduction of aromatic nitro compounds and photocatalytic hydrogen production reactions under visible light irradiation and ambient conditions were used to systematically evaluate the photoredox performances of the as-assembled well-defined Au–CdS Ns nanocomposites. It was unveiled that the photoactivities of Au–CdS Ns nanocomposites strongly depend on the weight addition ratio of Au NPs and the addition of an excess amount of Au NPs is detrimental to the separation of photogenerated charge carriers from CdS Ns. With the optimum addition amount of Au NPs (1 wt%), it was found that spontaneous assembly of Au NPs on the CdS Ns remarkably prolonged the lifetime of the photogenerated charge carriers from CdS Ns under visible light irradiation, thus resulting in significantly enhanced photocatalytic redox activities of Au–CdS Ns nanocomposites compared with those of CdS Ns. The crucial role of Au NPs in the photoredox reactions as efficient electron traps rather than plasmonic sensitizers was determined. Moreover, predominant active species responsible for the photocatalytic process were unambiguously determined and a possible photocatalytic mechanism was elucidated. It is anticipated that our work could open up a new avenue to rationally prepare various 2D semiconductors–metal nanocomposites by utilizing such a simple and efficient self-assembly strategy for extensive photocatalytic applications in a myriad of fields.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Xiaojie Song,Xiufang Wang,Weiwei Dong,Qishu Qu,Haichen Wang,Fan Yang
Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the effective approaches to tackle the growing environmental and energy challenges. Homogeneously dispersed silver nanoparticles (Ag NPs) and cadmium sulfide nanoparticles (CdS NPs) with average particle size not>20 nm were fabricated on the surface of titanium dioxide nanotubes (TNTs) (Ag/CdS/TNTs) with the help of sodium dodecyl benzene sulfonate (SDBS). Herein, more surface active sites are created on the surface of nanocomposites. The experimental results demonstrate that the photocurrent intensity of the nanocomposites obviously increased, which effectively improves the photocatalytic activity. The results of photocatalytic experiments indicated that using triethanolamine (TEOA) and acetonitrile (MeCN) as sacrificial agents, the nanocomposites afford the CO yield from CO 2 (1455.6 μmol‧g −1 ‧h −1 ). Besides, Ag/CdS/TNTs nanocomposites displayed the H 2 evolution rate of 3700.57 μmol‧g −1 ‧h −1 , which was twice as much as pure TiO 2 NPs. The increase in the photocatalytic ability of the nanocomposites is basically attributed to the three materials formation S-scheme heterojunction which reduce the recombination probability of the photo-induced electrons and holes and thus enhances the photocatalytic activitys. Ultimately, a photocatalytic reaction mechanism is proposed for Ag/CdS/TNTs nanocomposites in the reduction of CO 2 .
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