MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Dawei Gao,Haixiang Wang,Jiajun Tang,Qiaoli Lu,Feifei You,Chao Ye,Lili Wang,Jian Qi
Conventional MoS 2 catalysts face challenges, including weak piezoelectric response, reliance on energy-intensive ultrasound, and limited active sites, reducing their efficiency in degrading organic pollutants. In this work, 1T/2H heterostructured MoS 2 nanoflowers were synthesized via an ionic liquid-assisted hydrothermal method, enabling efficient piezocatalytic activation of peroxymonosulfate (PMS) under mild mechanical stirring. The 1T/2H MoS 2 /PMS system rapidly degraded 95.9 % of Rhodamine B in 15 min, with a kinetic rate 4.43 times higher than conventional MoS 2 , and showed excellent cycling stability. This superior performance was due to enhanced piezoelectric polarization at heterointerfaces, which improved charge carrier separation, and the use of low-energy mechanical stirring instead of ultrasound for activation. Optimized interfacial charge transfer pathways also boosted the generation of superoxide anions (•O₂⁻) and singlet oxygen (¹O 2 ). Moreover, immobilizing 1T/2H MoS 2 on conductive carbon cloth enhanced recyclability and operational feasibility, offering a sustainable solution for water treatment technologies.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Xiaoyan Ma,Longfei Fu,Ling Zhang,Meiqi Bao,Jie Zhou,Huiting Wang,Qian Zhang,Jiarui Xia
A high-performance flexible surface-enhanced Raman spectroscopy (SERS) substrate has been developed that integrates signal enhancement, self-calibration stability, and photocatalytic self-cleaning functions, enabling reliable SERS detection of organic pollutants in complex environments. The photocatalytically active MoS 2 serves as an intrinsic internal standard (IS) to effectively correct SERS signal fluctuations. The Schottky junction formed between MoS 2 and Au nanoparticles (Au NPs), through the synergistic effect of electromagnetic (EM) and chemical (CM) enhancements combined with localized electric field-induced electron flow, reduces the limit of detection (LOD) for Rhodamine 6G (R6G) to 3.24 × 10 −9 M. Meanwhile, by enhancing the separation efficiency of photogenerated carriers, the substrate achieves efficient self-cleaning within 25 min, demonstrating excellent reusability. For practical application validation, the MoS 2 /Au/filter paper (MoS 2 /Au/FP) flexible substrate was successfully applied to the integrated “wiping, detection and self-cleaning” analysis of 10 −5 to 10 −7 M malachite green (MG) residues on herring surfaces. It maintained stable SERS quantitative performance across multiple rounds of real-sample analysis, verifying its signal reliability for complex matrix detection. This triple-integrated SERS substrate provides novel insights for developing efficient and reliable on-site rapid detection technologies, holding significant application value in food safety monitoring, environmental pollutant analysis, and related fields.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Lingtun Hao,Maofeng Ding,Song Song,Yong You,Xingang Li
Photocatalytic amino acid synthesis from biomass is a promising and renewable method, yet the synthesis efficiency remains suboptimal. Here, we report a novel strategy for synthesizing 2D/2D CdS/1T-MoS 2 heterojunctions by leveraging 1T-phase MoS 2 with distorted octahedral coordination and sulfur-rich edges to promote the formation of large contact areas and abundant interfacial sulfur vacancies in combination with CdS. CdS/1T-MoS 2 displays exceptional photocatalytic performance for amination of biomass-derived α-hydroxy acids to α-amino acids, achieving an alanine formation rate of 23.3 mmol·g -1 ·h -1 from lactic acid, which is 4.4 and 1.6 times higher than those of CdS and CdS/2H-MoS 2 , respectively. Detailed characterizations reveal that CdS/1T-MoS 2 possesses abundant interfacial sulfur vacancies at the 2D/2D heterojunction interface compared to CdS and CdS/2H-MoS 2 . These vacancies create numerous Lewis acids sites, significantly enhancing the adsorption and activation of hydroxyl groups in lactic acid, thereby promoting the dehydrogenation step. Moreover, CdS/1T-MoS 2 facilitates the condensation of pyruvic acid with ammonia and promotes the desorption of alanine from the catalyst surface, effectively improving the reductive amination step. Additionally, CdS/1T-MoS 2 exhibits superior charge carrier separation and migration efficiency, further boosting its photocatalytic amination activity. This study provides a novel strategy for synthesizing 2D/2D heterojunctions with abundant interfacial vacancies for efficient photocatalytic biomass valorization.
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Small
·
2021
·Vol. 17
·期 50
·2103993
·
IF 13.281
Zhaopu Yang,Xinliang Fu,Daichuan Ma,Yulin Wang,Liming Peng,Jiacheng Shi,Jiyu Sun,Xueqi Gan,Yi Deng,Weizhong Yang
Phototherapy has recently emerged as a competent alternative for combating bacterial infection without antibiotic-resistance risk. However, owing to the bacterial endogenous antioxidative glutathione (GSH), the exogenous reactive oxygen species (ROS) generated by phototherapy can hardly behave desired antibacterial effect. To address the daunting issue, a quad-channel synergistic antibacterial nano-platform of Ti 3 C 2 MXene/MoS 2 (MM) 2D bio-heterojunctions (2D bio-HJs) are devised and fabricated, which possess photothermal, photodynamic, peroxidase-like (POD-like), and glutathione oxidase-like properties. Under near-infrared (NIR) laser exposure, the 2D bio-HJs both yield localized heating and raise extracellular ROS level, leading to bacterial inactivation. Synchronously, Mo 4+ ions can easily invade into ruptured bacterial membrane, arouse intracellular ROS, and deplete intracellular GSH. Squeezed between the “ROS hurricane” from both internal and external sides, the bacteria are hugely slaughtered. After being further loaded with fibroblast growth factor-21 (FGF21), the 2D bio-HJs exhibit benign cytocompatibility and boost cell migration in vitro. Notably, the in vivo evaluations employing a mouse-infected wound model demonstrate the excellent photonic disinfection towards bacterial infection and accelerated wound healing. Overall, this work provides a powerful nano-platform for the effective regeneration of bacteria-invaded cutaneous tissue using 2D bio-HJs.
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Analytical Methods
·
2019
·Vol. 12
·期 4
·491-498
·
IF 2.378
Zhang-Jin He,Tian-Fang Kang,Li-Ping Lu,Shui-Yuan Cheng
In this study, a novel electrochemiluminescence (ECL) biosensor based on a CdSe@CdS quantum dot (QD)-functionalized MoS2-modified electrode was developed for the sensitive detection of mercury ions. Polycationic poly(diallyldimethylammonium chloride) (PDDA) and negatively charged QDs were adsorbed on the surface of MoS2, in sequence, to form the QD–PDDA–MoS2 composites, which were employed as matrices for immobilizing thymine-rich DNA sequences (DNA1). The gold nanoparticles (AuNPs) were combined with another type of thymine-rich DNA sequences (DNA2) and glucose oxidase (GOD) to prepare the GOD–AuNP–DNA2 conjugates. The composites were characterized via UV-visible absorption spectroscopy, fluorescence and transmission electron microscopy. A thymine–Hg2+–thymine complex was formed through Hg2+ mismatching with DNA1 and DNA2. GOD was, therefore, modified onto the electrode surface. GOD catalyzed the reduction of dissolved oxygen by glucose to produce hydrogen peroxide, which was a co-reactant of the QDs. The electrochemiluminescence signal of the biosensor increased linearly with the increase in the Hg2+ concentration over the range from 1.0 × 10−12 to 1.0 × 10−6 M with a detection limit of 1 × 10−13 M. The reproducibility, stability and specificity of the biosensor was also studied. The biosensor was used to determine Hg2+ in a real water sample and satisfactory results were obtained.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
·
IF 4.539
Mengxin Zhao,Xin Guo,Zhe Meng,Yinghui Wang,Yuan Peng,Zongqin Ma
In this study, ultrathin molybdenum disulfide (MoS 2 ) nanosheets with thickness of 1.6–8.8 nm were obtained by liquid-phase exfoliating bulk MoS 2 . Then, they were employed as cocatalyst to build ultrathin MoS 2 /g-C 3 N 4 heterojunction by self-assembly method. The degradation reaction of chlorimuron-methyl herbicide and tetracycline antibiotics under visible light was used to evaluate the photocatalytic properties of ultrathin MoS 2 /g-C 3 N 4 . The results showed that ultrathin MoS 2 /g-C 3 N 4 composite exhibit superior photocatalytic performance. The MoS 2 /g-C 3 N 4 composite with 15 wt% of ultrathin MoS 2 nanosheet exhibited the highest degradation efficiency with 90.4% for chlorimuron-ethyl and 91.7% for tetracycline in 45 min under simulated sunlight, which was 8.8 times and 13.4 times than that of bare g-C 3 N 4 , respectively. The outstanding photocatalytic activity of ultrathin MoS 2 /g-C 3 N 4 heterojunction thanks to the unique features of ultrathin MoS 2 nanosheet that it harvesting the entire visible light, increasing the contact surface area with the support and shortened the electron and ion migration length, as well as more exposed edge sulfur atoms as redox centers. The radical scavenger experiments showed that • OH and • O 2 - plays a key role in the photocatalytic degradation process. This study provides a new idea for the design of high-activity a co-catalyst, that is, ultrathin MoS 2 nanosheet has a significant influence on the photocatalytic performance of MoS 2 /g-C 3 N 4 heterostructure photocatalyst .
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Qiang Fu,Zhiling Huang,Zheming Ni,Shengjie Xia
Effectively enhancing nitrogen activation and inhibiting water splitting reactions are key factors in photocatalytic nitrogen reduction. This work integrated defect engineering and metal doping, doping transition metals Sc, Cu, and V into molybdenum sulfide (MoS2) containing sulfur vacancies (VS) to prepare TM@VS−MoS2(TM=Sc, Cu, V), applied for photocatalytic nitrogen reduction (pNRR). High angle annular dark field scanning transmission electron microscopy (HAADF-STEM) confirms the existence of S vacancies. The pNRR activity of Sc@VS−MoS2, Cu@VS−MoS2 and V@VS−MoS2 is 124.26 μmol g−1 h−1, 101.32 μmol g−1 h−1, 88.64 μmol g−1 h−1, respectively, which is much higher than that of MoS2, VS−MoS2, and TM@MoS2. This fully demonstrates that the comprehensive use of S vacancies and metal doping can significantly enhance the photocatalytic performance of MoS2 (with a maximum activity improvement of nearly 5 times). DFT calculations show that transition metal doping can further promote the activation of N2 and inhibit the production of H2 from water decomposition for vacancy MoS2. The effect of the above promotion and inhibition is consistent with the order of activity and photoelectronic properties: Sc@VS−MoS2>Cu@VS−MoS2>V@VS−MoS2. In situ infrared spectroscopy revealed the generation of −N2Hy (1≤y≤4) active species during the pNRR process, which is consistent with the most potential pathway (enzymatic mechanism) calculated by DFT.
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NANOTECHNOLOGY
·
2020
·Vol. 31
·期 18
·185701
·
IF 3.551
Xiaofeng Cui,Yu Zhou,Jian Wu,Shan Ling,Lijun Zhao,Jianli Zhang,Junwei Wang,Wei Qin,Yuanguang Zhang
A solid-state Z-scheme system, with the synergistic integration of the advantages of various narrow-band semiconductors, is considered to be a potential strategy to develop efficient photocatalysts for operation under visible light illumination. However, the charge separation efficiency of these systems has always been reduced by disordered electron transfer between coupling semiconductors. In this work, we constructed a direct Z-scheme system WO3-MoS2-Pt through the loading of WO3 quantum dots onto MoS2 nanosheets and the selective depositing of a Pt co-catalyst onto MoS2. X-ray diffraction, transmission electron microscopy, atomic electron microscopy and x-ray photoelectron spectroscopy, etc were used to confirm the successful preparation of the targeted photocatalyst. This photocatalytic system showed high visible-light-driven H2 evolution activity (802.2 μmol · h−1 · g−1) and good photostability. Control experiment and mechanism analysis suggested that the remarkable performance can be attributed to the heterojunction formed WO3 and MoS2 and the vectorial electron transfer (WO3 → MoS2 → Pt) achieved by selectively loading the Pt co-catalyst.
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ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Yudong Xue,Shili Zheng,Yi Zhang,Wei Jin
Environmental conversion of As(III) to less toxic As(V) is a critical step for the arsenic pollution remediation. In the present study, MoS 2 ultrathin nanosheets modified carbon felt electrode is fabricated by a facile hydrothermal method and employed as the two-electron oxygen reduction reaction (ORR) cathode for the As(III) oxidation in alkaline media. Due to the rich Mo O bonds at MoS 2 ultrathin nanosheets, the two-electron ORR catalytic property, electrical conductivity and hydrophilic behavior are significantly enhanced. Besides, As(III) can be efficiently conversed via adsorption-oxidation scheme on the modified layer, and there is good stability on the MoS 2 modified electrode during the electro-oxidation process. This MoS 2 modified carbon felt can be presented as a cost-effective cathode for the electroperoxidation process and provided further understanding for the environmental remediation in alkaline media.
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EES Catalysis
·
2025
·
IF 8.1
Guangxun Sun,Peng Xue,Changle Yue,Yang Li,Hongfu Shi,Xin Zhang,Fengyu Tian,Junxi Li,Zekun Guan,Bin Liu,Zhi Liu,Yunqi Liu,Yuan Pan
The development of a synergistic coupling catalyst at the atomic scale for slurry-phase hydrogenation of vacuum residue (VR) is extremely challenging. Herein, we designed and constructed a robust coupling catalyst comprising Mo single atoms and MoS2 (Mo SAs–MoS2) using a reaction induction transformation strategy. The spontaneous generation of Mo SAs–MoS2 synergistically promoted H2 activation and enhanced local active hydrogen concentration in the hydrogenation of VR. Benefiting from the strong hydrogen concentration distribution in MoS2 and Mo SAs, the catalyst revealed remarkable hydrogenation performance toward VR with a TOFT of up to 0.39 s−1, liquid product yield of 92 wt%, and coke content of 0.6 wt%. Theoretical calculations revealed that the synergistic action of Mo SAs–MoS2 facilitated electron transfer between Mo species and reactants, reducing the desorption energy barriers for H2 and anthracene and thereby promoting the hydrogenation of VR. This work provides a novel idea for the design of efficient coupling catalysts for strengthening local active hydrogen concentration in the hydrogenation of VR, and this concept can be applied to other hydrogenation systems.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Lei Liu,Ning Liu,Chengna Dai,Ruinian Xu,Gangqiang Yu,Ning Wang,Biaohua Chen
Realizing MoS2 basal plane activation is highly desirable and challenging in the field of hydrodesulfurization (HDS). Herein, we have developed a new strategy of dual Co single atom doping (SAD) combined with CO in situ regulation, which can successfully activate the basal plane of Co3.6%–MoS2-0.3 generating high ratios of thermostable 1T-plane (∼70%) and large S vacancies. For the first time, a synergistic effect has been unraveled where the lattice substituted neighboring dual SA Co can efficiently activate in-plane S through extensively reducing its band gap (2.21 → 0.14 eV), which tremendously favors S subtraction and 2H → 1T phase transition assisted by CO. Boosted thiophene HDS activity can be eventually achieved with the reaction rate constant (k) being 8.3 times higher than that of commercial cCo3.6%–MoS2 (0.04 → 0.33 h–1). Generally, the present work paves a new way for next-generation HDS catalyst design with activated basal plane.
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MOLECULES
·
2025
·Vol. 30
·期 11
·2343
·
IF 4.6
Xinyue Li,Yahui Song,Yiming Huang,Jihui Zhang,Siyu Wu,Wentao Zhang,Jin Wang,Xian Zhang
MoS2has emerged as a highly promising catalyst for the hydrogen evolution reaction (HER) owing to its exceptional catalytic properties. However, there is a pressing need to further enhance its reactivity and integrate oxygen evolution reaction (OER) capabilities to facilitate its industrial implementation. In this context, a dual-metal doping approach presents a straightforward and effective strategy to achieve superior catalytic performance. Systematic characterization and electrochemical evaluations reveal that the synergistic effects of Co and Fe doping significantly enhance both HER and OER activities, demonstrating remarkable potential for practical applications in energy conversion and storage systems. The unique flower-like architecture of the material endows it with a substantially enlarged surface area, which significantly increases the exposure of active sites and facilitates enhanced catalytic activity. Specifically, it achieves the low overpotentials of −127 and 292 mV at 10 mA cm−2for HER and OER in alkaline media, respectively, and demonstrates excellent stability over a 10 h test. This research provides valuable insights into the development of advanced materials capable of efficiently performing both HER and OER processes, paving the way for potential applications in sustainable energy technologies.
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