RSC Advances
·
2024
·Vol. 14
·期 15
·10703-10713
·
IF 3.9
Jiayu Chen,Chun Ji,Xiao Wang,Yunxia Tian,Han Tao
Chlorpyrifos (CPF) is the most common pesticide entering the food chain and posing a threat to human health. This study presents a new electrochemical biosensor based on molybdenum disulfide nanosheets and nitrogen-doped carbon dot nanocomposite (MoS2@N-CDs) and kidney bean esterase (KdBE), and it is shown to achieve accurate detection of CPF. MoS2@N-CDs were prepared by a facile solvothermal method and characterized by electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Electrochemical characterization confirmed that MoS2@N-CDs facilitated electron transfer and increased the electroactive surface area of the electrode, thereby improved the sensing performance of the electrode. The oxidation peak current of 1-naphthol, which was produced by the hydrolysis of 1-naphthyl acetate catalyzed by KdBE, was adopted as the signal of the sensor. CPF can suppress KdBE activity and consequently cause a decrease in the sensing signal. The experimental results show that the variation of sensing signal is a reliable index to evaluate the CPF level. Under the optimized conditions, the developed enzyme sensor showed superior CPF assay performance with a linear detection range as wide as 0.01–500 μg L−1 and LOD as low as 3.5 × 10−3 μg L−1 (S/N = 3). The inter- and intra-batch RSDs for electrode testing were 4.02% and 2.69%, respectively. Moreover, the developed biosensor also showed good stability and anti-interference. The spiked recoveries of CPF in oilseed rape and cabbage ranged from 98.09% to 106.01% with low relative standard deviation (RSD) (<5.23%), suggesting that the sensor is a promising tool to enable simple, low-cost but highly sensitive large-scale screening of CPF residues in food.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Jiaxin Zheng,Miao Wang,Xinli Tong,Ye Yuan
The catalytic selective etherification of 5-hydroxymethyl furfural (5-HMF) is considered as a feasible route to prepare the biofuels from biomass feedstocks. In this work, a novel solid acid catalyst derived from the flower-like MoS 2 is synthesized by combination of the facile hydrothermal method and reduction process. Therein, the number of Lewis and Bronsted acidic sites derived from the exposed Mo edges of MoS 2 can be efficiently regulated by changing the hydrogen annealing conditions. The prepared MoS 2 -450-R catalyst exhibited a prominent activity for the conversion of 5-HMF to 5-(methoxymethyl)furanal dimethyl acetal (5-MFDMA) through the tandem acetalization and etherification under N 2 atmosphere, in which a 99.0 % conversion with 83.7 % selectivity of 5-MFDMA is obtained. Further investigations revealed that the abundant acidic sites of MoS 2 -450-R plays a crucial role on the reaction of 5-HMF with methanol. Finally, based on the characterization of catalyst and reaction phenomena, a possible reaction network for the acetalization and etherification of 5-HMF with the methanol has been proposed.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Atiq Ur Rehman,Muhammad Anwar,Adil Khan,Kashif Ali Kalhoro,Chi Zhang,Yanke Zhang,Mohammadreza Shokouhimehr,Zhengchun Liu
Uric acid (UA) and dopamine (DA) are clinical biomolecules associated with various physiological and pathological processes. This study investigates the electrochemical sensing performance of UA and DA based on a dual-modified electrode with holey molybdenum disulfide (h-MoS 2 ) and electrodeposited nickel nanoparticles (NiNPs) GCE/ENi-hMoS 2 . To fabricate an electrochemical sensor, h-MoS 2 nanosheets were synthesized using a simple ultrasonic process from bulk MoS 2 for UA and DA detection. The electrochemical sensing performance of h-MoS 2 and NiNPs modified electrodes were characterized using techniques, such as cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Due to the synergetic contribution of h-MoS 2 and NiNPs, the sensor achieved remarkable sensitivity and also exhibited strong anti-inference ability. The sensor exhibited linear ranges between 100–9000 μM and 50–3600 μM, with low detection limits of 7.3 μM and 2.1 μM for UA and DA simultaneously. Additionally, the developed GCE/ENi-hMoS 2 -based electrochemical sensor exhibited high selectivity in the existence of interfering substances, including glucose and ascorbic acid with good stability. This study offers a reference for the fabrication of stable electrochemical sensors consolidated by two-dimensional materials for small-molecule detection.
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Liang Xin,Zhao Dong-Qing,Huang Qian-Qian,Liang Sheng,Wang Li-Li,Hu Lei,Liu Ling-Li,Hu Kun-Hong,Deng Chong-Hai,Cheng Sheng,Zhu Er-Tao,Deng Hua-Xia
Lithium–sulfur battery is one of the most promising battery systems for industrialization due to its high theoretical specific capacity and high energy density. Nonetheless, the “shuttle effect” has restrained the advancement of lithium–sulfur batteries. In this work, a gradient-structured nanofiber membrane with pure gelatin on one side and Super P-MoO 2 /MoS 2 -gelatin on the other side was created using a multi-step electrostatic spinning technique, which was applied for multi-functional separator for lithium–sulfur batteries. The pure gelatin layer facing the anode side primarily homogenizes the lithium flux, whereas the Super P-MoO 2 /MoS 2 -gelatin layer facing the cathode side primarily adsorbs polysulfides by physical and chemical adsorption and enhancing polysulfide conversion efficiency. The findings demonstrate that even after 150 cycles at 0.2C, the lithium–sulfur battery can still sustain a discharge-specific capacity of 572.3 mAh·g −1 . When used with Li||Li symmetric batteries, it has a cycle life of more than 1200 h. The commercialization of lithium–sulfur batteries is given a fresh idea by this straightforward preparation technique. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xin Jiang,Rui Wang,Yimin Tang,Weijie Di,Wenxue Wang,Bing Zhao,Libin Yang
Combined contribution of electromagnetic and chemical effects and their synchronous tuning are an effective strategy for constructing semiconductor surface-enhanced Raman scattering (SERS) substrates with ultra-high sensitivity. In this work, a sulfur vacancy-rich MoS 2 flower-like microsphere is successfully prepared for the first time through the combination of morphology regulation and defect engineering strategies, achieving a synchronous contribution of electromagnetic and chemical effects to SERS enhancement. SERS enhancement factor is as high as 2.54 × 10 8 , which represents the highest sensitivity among the currently reported semiconductor SERS-active substrates. The theoretical calculations and experiments elucidate the observed enhancement activity and the synchronous enhancement mechanism of electromagnetic and chemical effects. The unique flower-like structures of MoS 2 can induce Mie resonance by multiple reflection and scattering of incident light in the cavity structure, which realizes a strong electromagnetic enhancement effect. Meanwhile, a high-efficient carrier separation in substrate and a multiple-channel charge transfer mode between substrate and analyte can be achieved by means of abundant surface sulfur-vacancy defects, which provide a strong chemical enhancement effect for target analyte. This work opens up a new idea and perspective for constructing supersensitive semiconductor SERS sensors, ultimately advancing practical application of semiconductor SERS technology.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zhenyu Wen,Wenjie Zhu,Yongxue Chen,Huanhuan Sun,Lin Zhu,Yuling Yang,Yanping Song,Lei Chen,Jiajun Dong,Bingbing Liu
Surface-enhanced Raman spectroscopy (SERS) holds immense promise for molecular detection, yet the quest for high-performance, plasmon-free substrates remains active. This work pioneers the rational design and engineering of phase-tunable MoS2 nanoclusters─metallic (1T), semiconductor (2H), and, critically, hybrid metal/semiconductor (1T/2H) phases as a novel class of SERS platforms. We demonstrate this exceptional capability for ultrasensitive detection of environmentally hazardous dyes (e.g., rhodamine B, crystal violet, and methylene blue). Remarkably, the optimized 1T/2H-MoS2 substrate achieves an enhancement factor of 1.02 × 109, which ranks among the higher values for SERS substrates derived from semiconductors. Crucially, time-resolved transient photoluminescence decay spectroscopy reveals a dramatic 52% decrease in average exciton lifetime (from 3.88 to 1.86 ns) for RhB adsorbed on 1T/2H-MoS2 substrates. This profound decrease provides direct evidence for highly efficient interfacial charge transfer, predominantly driven by the built-in electric field unique to the engineered phase junction. Furthermore, by leveraging the distinct Raman signatures enabled by this heterophase substrate, we achieve the multiplex detection of all five environmental nucleobases (adenine, guanine, cytosine, thymine, and uracil) in both individual and mixed solutions. This work not only delivers fundamental mechanistic insights into charge transfer-mediated SERS but also provides a practical platform with broad implications for environmental monitoring, biomedical diagnostics, and analytical chemistry.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Keru Song,Anze Shui,Mingyuan Hu,Hulei Yu
Transition metal dichalcogenides (TMDs) with regulated band structures and multilayered structures have attracted considerable interest in microwave absorption materials. However, the rational design of the hierarchical structure with phase and defect from a microscopic perspective remains challenging. Here, the O-doped 1 T/2H MoS 2 heterojunction is successfully fabricated with a hierarchical morphologically controllable 3D flowerlike structure using the cetyltrimethylammonium bromide template method. It is found that the heterogeneous interface between 1 T and 2 H MoS 2 phases can increase interfacial polarization, and the defects with O dopants and vacancies are beneficial to improve dipole polarization and conductive loss. Such a synergism results in a significantly enhanced electromagnetic wave absorption (EMWA) in these O-doped 1 T/2H MoS 2 samples, achieving the minimum reflection loss (RL min ) of −55.28 dB at a matching thickness of 2.53 mm and an effective absorption bandwidth of 5.05 GHz at 1.88 mm in the as-fabricated MS0.3C-40 samples. Meanwhile, the RL min of the as-fabricated MS0.3C-50 samples reaches −55.24 dB at a matching thickness of 2.29 mm with a maximum radar cross-section of 38.72 dB∙m 2 . These findings pave the way for optimizing the EMWA performance of TMDs with the synergism of phase engineering and defect engineering.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Feng Zhang,Mengke Wang,Lili Zhang,Xingguang Su
Herein, we developed a novel and sensitive ratiometric fluorescence strategy for pH sensing and urea detection based on MoS 2 quantum dots (MQDs) and 2, 3-diaminophenazine (DAP). The DAP was pH-sensitive and can be used as pH indicator while MQDs was pH-insensitive and acted as a reference fluorescent signal. The fluorescence intensity of DAP at 568 nm exhibited increases gradually while the fluorescence intensity of MQDs at 420 nm kept unchanged as the pH changed from 3.0 to 9.0. So the ratio of the two fluorescence intensities at 568 nm and 420 nm can be used to monitor the change of pH. The pH-sensing system showed a linear and reversible respond to pH in the range of 3.8–6.0 with an interval of 0.2 pH unit. Furthermore, the enzymatic reaction of urea in the presence of urease can lead to the pH increase of the solution, which can be used to detect urea by using the above-mentioned pH-sensing system. There exhibited a good linear relationship between the ratiometric fluorescence intensity of I 568 /I 420 and urea concentrations ranging from 5 to 700 μM. And a low detection limit of 1.8 μM was obtained. The proposed strategy exhibited excellent selectivity and sensitivity. Additionally, the developed ratiometric fluorescence strategy was successfully applied to detect urea in water samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Keke Chen,Yang Li,Yuhao Feng,Xuefeng Li,Zhiqiang Li,Shuming Liu,Chunhua Ge,Xiao Chen
Solar-thermoelectric generators (STEGs) capable of harnessing solar energy for conversion into clean electricity are pivotal for advancing towards carbon neutrality. The integration of phase change materials (PCMs) with STEGs facilitates power generation regardless of solar radiation flux due to their robust thermal management capacity. However, the inherent solar-thermal conversion efficiency limitation of PCMs hinders the production of high and sustained electrical output. Herein, a multidimensional engineering strategy is proposed to align two-dimensional (2D) molybdenum disulfide (MoS 2 ) nanosheets vertically in situ on a dodecahedron composed of zero-dimensional (0D) Co nanoparticles and three-dimensional (3D) high graphitized carbon derived from ZIF-67, thus significantly boosting the solar-thermoelectric energy generation of polyethylene glycol (PEG). The resultant PEG-Co/C@MoS 2 composite PCMs exhibit a high solar-thermal conversion efficiency of 92.89%, benefiting from the synergy of multiple components and unique structural arrangements. When coupled with thermoelectric devices, this powerful STEG yields a high and durable output voltage of 197.51 mV and a current of 52.47 mA under 100 mW cm −2 , outperforming the majority of previously reported literature. This PCM-integrated solar-thermoelectric generator overcomes limitations associated with temporal and meteorological variations, enabling simultaneous high-density heat and electricity generation for energy conservation and environmental sustainability.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-14
·
IF 15.7
Wang Peng,Zhao Danyang,Zhang Peng,Hui Xiaobin,Zhang Zhiwei,Wang Rutao,Wang Chengxiang,Ge Xiaoli,Liu Xiaojing,Li Yuguang C.,Yin Longwei
The metallic phase MoS 2 (1T-MoS 2 ) supported metal-nanocatalyst is an appealing material system for accelerating the redox kinetics of non-aqueous Li | |O 2 batteries. However, the drawbacks associated with the surface orbital steric effect and the internal electron coupling results in a detrimental effect for the stability of 1T-MoS 2 , especially for the interface charge transfer. This makes it difficult to incorporate guest metal nanoparticles without compromising the 1 T phase support. To circumvent these issues, here we propose a p-block element (In-O) doping strategy to stabilize the 1 T phase MoS 2 by moderating the surface orbital steric effect and strengthening the internal chemical bonding, and thus for the epitaxial Ru nanocatalyst graft on the stabilized 1T-MoS 2 for Li | |O 2 batteries. The experimental and theoretical analyzes indicate that the In-O-MoS 2 @Ru enhances the O 2 dissociation and facilitates the adsorption of LiO 2 intermediates. This effect promotes the growth of weakly crystalline Li 2 O 2 films during oxygen reduction reaction, which can be more easily decomposed during the oxygen evolution reaction, thereby enhancing the bifunctional-catalytic kinetics. When employed at the positive electrode for non-aqueous Li | |O 2 batteries, In-O-MoS 2 @Ru shows an overpotential of 0.37 V and a cycling life of 284 cycles at 200 mA g −1 with a final discharge specific capacity of 1000 mAh g −1 at 25 °C.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ziming Huang,Jie Li,Shenghui Guo,Jianhua Liu,Jiabin Zeng,Feigang Yuan
MoS 2 is a promising electrocatalyst for the hydrogen evolution reaction (HER), but it is limited by its own agglomeration, low conductivity, and surface inertness. In this study, we report a well-organized 3D hybrid structure of N-rich active porous carbon (CN) synergized with Co-doped molybdenum disulfide (Co-MoS 2 @CN) for promoted electrocatalytic hydrogen evolution. MoS 2 nanosheets were grown vertically on CN and the pore structure was improved, which exposed abundant edge active sites. The N-rich graphite structure and abundant pore structure of CN enhanced the electron transfer ability and stability of the 3D hybrid structure. Meanwhile, doping of Co atoms optimized the catalytic activity of the in-plane sulfur sites and induced a partial transition from 2H-MoS 2 to 1 T-MoS 2 . The resulting Co-MoS 2 @CN 3D hybrid structure exhibited excellent HER electrocatalytic performance, had a current density of 10 mA cm −2 in a 0.5 M H 2 SO 4 aqueous solution by an overpotential of 137 mV, and showed excellent stability in a 24 h HER test. DFT calculations confirmed that the heterogeneous interface constructed by CN and Co-MoS 2 effectively optimized Gibbs free energy (ΔG H* ) of the MoS 2 hydrogen adsorption site and enhanced the interfacial electron transfer capacity, which ensured rapid HER kinetics during the electrocatalytic process.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jinyong Hu,Yu Zhao,Bohao Liu,Yong Zhang
The exploitation of visible-light-activated gas sensors based on molybdenum disulfide (MoS 2 ) has been extensively investigated and is expected to hold tremendous potential in emerging fields of indoor gas sensing applications activated by daylight lamp. Enlightened by the localized surface plasmon resonance (LSPR) effect of Au nanoparticles in visible light spectrum and the abundant active sites of SnS quantum dots, an indoor white light activated gas sensor based on Au@MoS 2 /SnS nanocomposites is rationally developed for the high sensitive detection of nitrogen dioxide (NO 2 ). Under the white light irradiation, the as-proposed gas sensor demonstrates an enhanced response exceeding 25-folds toward 1 ppm of NO 2 compared with the pristine MoS 2 gas sensor. Moreover, the white light-activated Au@MoS 2 /SnS gas sensor manifests excellent repeatability, rapid response/recovery speed (7/8 s), ppb-level detection limit, favorable long-term stability, and remarkable selectivity toward NO 2 . These enhanced gas sensitive performances principally stem from the interfacial charge transfer effect within the Au@MoS 2 /SnS composite material and the multiplied gas-sensitive pathways facilitated by the LSPR effect originating from the Au nanoparticle cores. This work paves an efficacious avenue for the development of high-performance gas sensitive devices operable at room temperature, thereby facilitating innovative advancements of gas sensing technology in various Internet of Things (IoTs) applications.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）