FOOD CHEMISTRY
·
2022
·
IF 9.231
Shuang Han,Yuxin Ding,Fu Teng,Aixin Yao,Qiuxue Leng
This study introduces an innovative procedure for the development of a molecularly imprinted electrochemical sensor for ultra-sensitive and specific recognition of butylated hydroxyanisole (BHA). First, a uniquely flower-like molybdenum disulfide/Ag nanoparticle-chitosan (MoS 2 /Ag NPs-CS) composite was prepared and used as a matrix to modify the electrode surface. Then, a layer of BHA-molecularly imprinted polymer was grown on the surface of the modified electrode by electropolymerization, with BHA as template molecule, which improved the specific recognition of the modified electrode to BHA. The MoS 2 /Ag NPs-CS material could not only increase the specific surface area of the electrode, accelerate the electron transport rate and mass transfer, but also promote the recognition of the polymer, so as to increase the current response and improve the performance of the electrochemical sensor. The prepared electrochemical sensor showed a wide linear range for BHA in the range of 1 × 10 −9 -1 × 10 −4 mol/L with a detection limit of 7.9 × 10 −9 mol/L. The recovery of BHA in several foods was from 95% to 103%. The sensor had good reproducibility, stability and excellent selectivity, and was successfully used for the detection of BHA in foods, providing a reliable detection method for sensitive, rapid and selective detection of BHA in complex food samples.
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高影响因子
Micro & Nano Letters
·
2022
·Vol. 17
·期 6
·125-133
·
IF 0.98
Jian-Jun Shi,Zhe Wang,Yan Wang,Rui-Wen Shu,Ping Yang
A photoelectrochemical sensor has been developed for the detection of the polycyclic aromatic hydrocarbon pollutant benzo [a]pyrene (BaP). An n -butyl lithium intercalation stripping method is applied to prepare tungsten disulphide nanosheets (WS 2 NSs). WS 2 NSs and β-cyclodextrin (β-CD)-modified MoS 2 quantum dots (QDs) are then compounded by hydrogen bonding between the amino and hydroxyl groups. After assembly on an indium tin oxide electrode, the energy level matching and synergistic photoelectric effect between β-CD-MoS 2 QDs and WS 2 NSs reduced the combination of photogenerated electrons and holes and an enhanced photocurrent signal is observed. As a result of the host–guest interaction between β-CD and BaP, BaP could bind to the β-CD-MoS 2 QDs in the nanocomposites, which hinders the electron migration to the electrode and weakened the photocurrent signal. Thus, the trace detection of BaP is realized. The rate of photocurrent change is also related to the BaP concentration from 1 to 20 nmol/L with a detection limit of 0.33 nmol/L. In summary, a highly sensitive and selective photoelectrochemical sensor for the detection of BaP is successfully constructed.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Tuxiang Guan,Zhisheng Cheng,Zemei Li,Lin Gao,Kelan Yan,Liming Shen,Ningzhong Bao
The intensive growth of smart portable devices has triggered a boom in the research of all-solid-state flexible supercapacitors. However, the unsatisfactory mechanical flexibility and limited energy density still hinder their practical application. Herein, a combination hydrothermal-assisted assemble strategy is proposed to design reduced graphene oxide fiber/MoS2 nanosheet-assembled composite fabrics (rGOFF–MoS2), where the MoS2 nanosheets vertically grow on the surface of rGO fibers through C–O–Mo covalent bonds. The synthesized rGOFF–MoS2 fabrics present an inter-linkage isotropy skeleton, a robust fusing node, an in situ vertical covalent bridge, an adequate pseudocapacitive reactivity, and a large electrochemical active surface (80.1 m2/g), resulting in fast interlaminar conductivity, great ionic migration and adsorption, and outstanding mechanical stability. The as-prepared flexible electrode displays a large capacitance of 330 F/g at 0.1 A/g (1330 mF/cm2 at 1 mA/cm2) and a high stability (95% capacitance retention after 10,000 cycles) in the H2SO4 electrolyte. Additionally, the assembled solid-state flexible supercapacitor presents an energy density of 69.44 μW h/cm2 (0.5 mW/cm2) and an excellent mechanical flexibility, making the rGOFF–MoS2 fabric a highly competitive candidate for practical applications in next-generation wearable/smart electronics.
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高影响因子
TALANTA
·
2022
·
IF 6.556
Xiaoli Wang,Junwang Ji,Pengfei Yang,Xinyu Li,Yiquan Pang,Panpan Lu
The detection of cancer markers still has shortages of low sensitivity, time-consuming operation, the use of unstable and expensive antibodies. In this work, a novel Love-mode surface acoustic wave (LSAW) aptasensor with dummy fingers based on the monolayer molybdenum disulfide/gold nanoparticles (monolayer MoS 2 /Au NPs) was developed for the highly sensitive and rapid determination of alpha-fetoprotein (AFP) in serum. Interdigital electrodes (IDTs) with dummy fingers were designed and applied to improve the acoustic characteristic of the LSAW aptasensor. The less energy dissipation and wave-front distortion of the LSAW aptasensor were confirmed by COMSOL simulation and test results. The newly-developed sensing film monolayer MoS 2 /Au NPs/Apt/6-mercaptohexanol (MCH) was applied for the specific detection of AFP and significantly improved the sensitivity of the LSAW aptasensor. The excellent performance of the LSAW aptasensor allowed the sensitive and rapid detection of AFP in serum in the range of 0.01 ⁓ 100 ng/mL with a low detection limit of 4.79 pg/mL. Additionally, the proposed LSAW aptasensor exhibited excellent selectivity , long-term stability, and reproducibility, and could be used to detect other cancer biomarkers.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lei Ding,Fei Qi,Yanfei Li,Jian Lin,Yang Su,Yihan Song,Lijing Wang,Haizhu Sun,Cuiyan Tong
The high photogenerated carrier recombination rate and the low visible light utilization limit the development of graphitic carbon nitride (CN) in industrial photocatalytic H 2 generation. Herein, 1T-phase MoS 2 nanoparticles with high conductivity and more active sites are in-situ grown on B-doped carbon nitride (CNB) nanosheets through a one-step hydrothermal method. The doping of boron element effectively improves the harvesting visible light ability by tuning the energy gap, while the introduction of 1T-phase MoS 2 successfully increases the carrier transfer rate by suppressing charge trapping. An optimized H 2 production activity of 5334 μmol h −1 g −1 with the apparent quantum efficiency of 10.2% is achieved by 1T-MoS 2 /CNB sample, which is 167 times higher than that of pure CN. The mechanism is systematically illustrated by the combination of DFT calculations and transient absorption measurements. This work provides a new way for the construction of transition metal-derived co-catalysts in photocatalytic hydrogen energy storage.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Guangsheng Dong,Huiying Yu,Lixin Li,Rongyu Zhang,Xu Yang,Kai Zhu,Guiling Wang,Dianxue Cao
MoS 2 is regarded as a hopeful anode candidate for sodium-ion batteries (SIBs) due to their various merits such as high specific capacity, abundant raw material reserves and low cost. However, their practical application is impeded by unsatisfied cycling ability due to the intense mechanical stress and unstable solid electrolyte interphase (SEI) during Na + insertion/extraction process. Herein, spherical MoS 2 @polydopamine derived highly conductive N -doped carbon (NC) shell composites (MoS 2 @NC) are designed and synthesized to promote the cycling stability. The internal MoS 2 core is optimized and restructured from the original micron-sized block to the ultra-fine nanosheets during initial 100–200 cycles, which not only improves the utilization of electrode materials but also shortens the ion transport distance. The outer flexible NC shell effectively maintains the original spherical structure of the overall electrode material and prevents the occurrence of large-scale agglomeration, which is conducive to form a stable SEI layer. Therefore, the core–shell MoS 2 @NC electrode presents a remarkable cyclic stability and a capable rate performance. Under a high rate of 20 A g −1 , the high capacity of 428 mAh g −1 can be acquired after over ultra-long 10,000 cycles without obvious capacity loss. Moreover, the MoS 2 @NC‖Na 3 V 2 (PO 4 ) 3 full-cell assembled by employing commercial Na 3 V 2 (PO 4 ) 3 cathode can achieve a high capacity retention of 91.4% after 250 cycles at 0.4 A g −1 . This work reveals the promising prospect of MoS 2 -based materials as anode of SIBs, and also has some inspirations on the structural design for conversion-type electrode materials.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Wen Huang,Yafei Li,Qianmin Fu,Ming Chen
The aggregation of MoS 2 nanoparticles and inefficient electron-migration limit their application for antibiotic removal. In this study, pomelo peel biochar (BC) with smooth surface structure was used as the matrix for loading nano-flower-like MoS 2 microspheres. The as-prepared nanocomposites were used to improve the removal efficiency of ciprofloxacin (CIP). A series of characterizations revealed that the optimal weight ratio of BC to MoS 2 was 3:35 (MoS 2 -BC 3/35 ). MoS 2 -BC 3/35 with narrow-bandgap (1.60 eV) possessed efficient light-utilization ability and the photodegradation efficiency toward CIP was 92.01%, whereas the CIP removal efficiency by MoS 2 was 44.50%. The improvement of this efficiency was attributed to the reduction of electron-hole pairs recombination. More attractively, superoxide radical (·O 2 − ) played a major role during the photocatalytic reaction, because the conduction band potential of MoS 2 -BC 3/35 (-0.81 eV) is lower than the potential of O 2 /·O 2 − (-0.33 eV). Overall, MoS 2 -BC 3/35 is a promising photocatalyst owing to its eco-friendliness, high-efficiency and easy-preparation.
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高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Peifang Chen,Caiyun Jiang,Zhouping Wang,Hong-zhen Lian,Xiaoyuan Ma
As a virulent metabolite, aflatoxin B 1 (AFB 1 ) presented in various cereal grain is tightly implicated in severe human diseases. In this study, 3D plasmonic nanohybirds of Raman molecule 4-mercaptobenzoic acid (4-MBA)-embedded and AFB 1 aptamer-modified bimetallic nanostars as SERS probes bound to magnetic nanoflowers were fabricated and demonstrated as a high-performance SERS-active aptasensor to quantitatively analyze AFB 1 . Bimetallic Au@Ag SERS plasmonic nanoprobes with enhanced properties were capable of enhancing discriminative Raman peaks of 4-MBA. Then, the integration of iron tetroxide nanoparticles (Fe 3 O 4 NPs) and molybdenum disulfide nanosheets (MoS 2 NShs) with huge specific surface area constituted stable 3D Fe 3 O 4 @MoS 2 plasmonic nanoflowers, facilitating the bind of numerous aptamer-based SERS probes via the non-covalent interaction between MoS 2 NShs and aptamer, which were ideal candidates for SERS-active substrates. Additionally, Fe 3 O 4 NPs as magnetic core endowed 3D nanocomposites with specific magnetic separation characteristic that caused the collected SERS hotspots to exhibit superior signal response, and further strengthening the sensitivity in a complex food matrix. Aptamer-target AFB 1 specific recognition triggered linearly diminished 4-MBA signal intensity (I 4-MBA ) on the substrate to achieve a low detection limit of 58.9 pg/mL. Furthermore, the sensor has the potential to be a promising monitoring tool for other trace contaminants.
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高影响因子
POLYMER COMPOSITES
·
2023
·Vol. 44
·期 12
·8903-8916
·
IF 5.2
Yunxia Li,Yiming Song,Dongchun Yang,Sheng Tian,Qin Deng,Xuegang Chen,Zhaobo Wang,Xin Wang,Haiqing Hu,Yilong Wang,Yong Tao,Jian Zhao
Recently developed covalent functionalization of chemically exfoliated MoS 2 (typically in alkyl lithium) allows the formation of chalcogenide-carbon bonds by reacting with organohalides and aryl diazonium salts. We herein develop a novel method for the covalent functionalization of MoS 2 to yield dodecylated MoS 2 via reductive activation in a strongly reducing sodium-naphthalene solution and using alkyl sulfide as an electrophile. Dodecylated MoS 2 /polystyrene (PS) composites fabricated by solution casting method. Dodecyl chains are grafted successfully onto MoS 2 nanosheets, which gives rise to the exfoliation level of few-layer thickness and matched compatibility with the host polymeric matrix. The inclusion of dodecylated MoS 2 at a concentration of 1.0 wt% yields a substantial improvement in both Young's modulus and tensile strength, with a 106.7% increase and a 67% enhancement, respectively, as compared to the performance of pure PS. The enhanced mechanical characteristics can be credited to the uniform dispersion of dodecylated MoS 2 within the PS matrix and enhanced interfacial interaction between the PS material and the filler. The composites demonstrate a significant increase in their glass transition temperature ( T g ). Notably, the dodecylated MoS 2 /PS (1.0 wt%) composite exhibits a 59.8% elevation in storage modulus when compared to pure PS. The coke yield of dodecylated MoS 2 /PS (1.0 wt%) reaches 2.7%, much larger than the value (only 0.2%) for pure PS. The novel functionalization might expedite the applications of molybdenum disulfide in diverse fields. Highlights A novel method for the covalent functionalization of MoS 2 . Dodecylated MoS 2 /PS composites were fabricated via solution casting method. Ultrathin structure of MoS 2 nanosheets was obtained after functionalization. Composites improvement in Young's modulus and tensile strength compared to PS. The composites show significant enhancements in T g .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shuaishuai Zhang,Junhua Kuang,Kun Wei,Yuxuan Zhou,Yudian Lei,Nuowen Ma,Huifang Miao,Liuxuan Cao
The wastewater generated by nuclear power plants contains a large number of radioactive substances, including 134 Cs and 137 Cs, which pose significant threats to human health and the environment. It is crucial to remove these radioactive substances from the nuclear waste . A significant challenge we encounter is the effective and selective extraction of cesium ions from wastewater. The wastewater is typically rich in competition ions and spans a wide pH range. In this report, we report a novel manganese silicate/MoS 2 composite material with high adsorption capacity for selectively removing Cs + from aqueous solutions with competition ions. Adsorption behaviors of cesium ions were investigated for composite ratio, adsorbent dosage, contact time, pH and competitive cations. Optimal conditions for the adsorption of cesium ions from aqueous solutions were achieved using a composite ratio of manganese silicate to MoS 2 at 9:1, an adsorbent concentration of 1.0 g L −1 , and a pH of 8 for a duration of 1 h. While the impact of K + and Na + is minimal at lower concentrations, it becomes more pronounced with increasing concentrations. The composite material demonstrates effective performance over the pH range of 2.0–12.0. Experimental data fitted with the pseudo-second-order kinetics and the Langmuir isotherm model suggests a single-layer chemical adsorption process , resulting in a remarkable adsorption capacity of 78.99 mg g −1 . Microscopic analysis reveals the synergistic effect of manganese silicate and MoS 2 . The manganese silicate provides efficient active sites for selective Cs + adsorption, while MoS 2 allows the highly dispersed surface for manganese silicate. This work reveals new insights into the design and synthesis of high-performance Cs + adsorption materials for application in the treatment of nuclear wastewater.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qinghe Wei,Dan Wang,Lili Zhang,Liqing Zhao,Bing Zhang,Guoli Zhou,Yafei Zhao
Exploring inexpensive and active bifunctional electrocatalysts to produce hydrogen and oxygen from water at all pHs is highly desirable. Herein, we report a facile one-step method to prepare vertically aligned Co doped MoS 2 nanosheets with extended interlayer distance on carbon cloth (Co–MoS 2 @CC) for full hydrolysis in both alkaline and acidic medium. Co–MoS 2 @CC exhibits long-term durability with overpotentials of 56.6 mV and 130 mV for hydrogen generation and 242 mV and 201 mV for oxygen production at 10 mA cm −2 in basic and acidic conditions, respectively. Moreover, we achieve low voltages of 1.585 V and 1.55 V in basic and acidic conditions respectively for the overall water splitting. We assume that such excellent property of Co–MoS 2 @CC may be ascribed to the uncovering of more active sites and high porosity resulted from Co doping, which boosts the conductivity and thus reduces MoS 2 hydrogen adsorption free energy in HER, as well as benefits to catalytic active sites in OER. This one-step doping approach opens up new ways to regulate the intrinsic catalytic activity to catalyze total hydrolysis at all PHs.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 39
·18575-18583
·
IF 3.591
Wei Tian,Jin Tian,Naiming Lin,Ye Liu,Hui Zeng,Shuo Dang,Zhongqing Jiang,Zhongde Wang
On account of multiple electron exchange reaction processes, transition metal sulfides with high specific capacities are considered as promising electrode materials for sodium-ion batteries. However, their poor electrical conductivity and fragile structure always result in a poor cycling performance and a low rate capability, which hinder their practical applications. Herein, based on a spatially-microscopic-confined strategy, double-layer carbon-encapsulated MoS2 (C@MoS2@C) nanocubes were synthesized using nitrogen-doped hollow carbon nanocubes as a precursor, and these were used as anode materials. Due to the self-healing capacity of MoS2 during the charging process, the microstructure of MoS2 was effectively restored and the electrode microstructure was stably maintained under ultra-long-term cycling. With these synergistic effects, the C@MoS2@C anode exhibited a remarkable reversible capacity of 163.9 mA h g−1 after 10 000 cycles even at an ultrahigh current density (10 A g−1), with capacity fading as low as 0.004% per cycle. The current findings of the microscopic spatially confined strategy could provide a promising approach for the rational design of high-capacity electrodes.
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