JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 2
·027547
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IF 3.721
Shuan Zhang,Yueyun Li,Chunyan Zhang,Yilei Jia,Ping Wang,Yunhui Dong,Xinjin Li,Qing Liu,Zengdian Zhao
Herein, urchin-like gold@platinum dendritic nanoparticles supported on molybdenum selenide@molybdenum disulfide (Au@Pt DNPs/MoSe2@MoS2) nanocomposite with multiple signal amplification capabilities was successfully synthesized as the matrix platform of label-free amperometric immunosensor for the quantitative detection of squamous cell carcinoma antigen (SCCA). Au@Pt DNPs/MoSe2@MoS2 consists of Au@Pt DNPs with splendid biocompatibility as well as catalysis and MoSe2@MoS2 with reformative peroxidase activity, which owned enhanced electrocatalysis toward hydrogen peroxide reduction and steady bioconjugation for bioprotein immobilization. Additionally, Au@Pt DNPs/MoSe2@MoS2 possessed satisfactory conductivity to accelerate electron transfer at the electrode interface. With the help of Au@Pt DNPs/MoSe2@MoS2, the immunosensor procured a good linear extent of SCCA detection between 100 fg ml−1 and 100 ng ml−1, reached a lower detection limit than previous reports. Moreover, the immunosensor with good stability and reproducibility achieved the specific detection of SCCA in the mixture containing interferents as well as in the real human serum sample, which testified to the proposed amperometric immunosensor was reliable in clinical detection of tumor biomarkers.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Xiaoyu Zhu,Peng Liu,Yu Ge,Ruimei Wu,Ting Xue,Yingying Sheng,Shirong Ai,Kaijie Tang,Yangping Wen
Electrochemical nanozyme sensor coupled with machine learning (ML) for intelligent analysis of carbendazim (CBZ) residues in tea and rice samples using graphene-like molybdenum disulfide (MoS 2 )/multi-walled carbon nanotubes (MWCNTs) porous nanohybrid network with oxidase-like characteristic was developed. MoS 2 /MWCNTs porous nanohybrid network was prepared by ultrasonic dispersion of MWCNTs into MoS 2 aqueous dispersion that was obtained by ultrasonic-assisted dispersion in sodium carboxymethyl cellulose water solution, which displayed low electron transfer resistance, high effective surface area, excellent film electrode stability. Machine learning via the artificial neural network for the intelligent analysis of CBZ was discussed in comparison with traditional regression analysis. Good electrocatalytic capacity, unique oxidase-like characteristic, wide linear range with 0.04–100 μM, low limit of detection with 7.4 nM, high sensitivity, and satisfactory practicability for CBZ demonstrated that electrochemical nanozyme sensor for the intelligent analysis of CBZ residues in edible agro-products was feasible. This will provide a new electrochemical sensing platform for the development of a graphene-like nanozyme sensor and its intelligent analysis of CBZ in food and agro-product safety.
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高影响因子
JOURNAL OF CATALYSIS
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2020
·
IF 7.888
Jichang Lu,Jian Fang,Zhizhi Xu,Dedong He,Siyou Feng,Yubei Li,Gengping Wan,Sufang He,Hua Wu,Yongming Luo
Supported MoS 2 based materials are widely used as heterogeneous catalysts. In this work, we propose a rapid and facile method (ultrasound-induced impregnation assisted by microwave thermal treatment) to synthesize mesoporous silica (SBA-15)-supported, few-layer, ordered and K-promoted MoS 2 nanosheets with different K/Mo ratios. The prepared catalysts are characterized by various physical and chemical techniques. Their catalytic performance is evaluated by methyl mercaptan (CH 3 SH) synthesis from CO/H 2 /H 2 S. The results show that our catalysts exhibit a much higher CO conversion and selectivity to CH 3 SH than the catalysts prepared using the conventional impregnation and reported in the literature. The good performance arises because of two main factors: MoS 2 nanosheets of only 2–4 layers and K promotion. Experimental characterizations and (density functional theory) calculations show that the former is the typical nano-size effect, and the latter stabilizes C S bonds when activating COS molecules.
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高影响因子
ACS Sensors
·
2020
·
IF 7.333
Fei Li,Siyu Wang,Huanshun Yin,Yan Chen,Yunlei Zhou,Jing Huang,Shiyun Ai
5-Formylcytosine (5fC) is a rare base found in mammalian DNA, which is thought to be involved in the demethylation of DNA. As a stable epigenetic modification, 5fC participates in gene regulation and cell differentiation, and plays an important role in the growth and development of plants. However, the abundance of 5fC is only as low as 0.002–0.02% of cytosine. Therefore, to further understand the functions of 5fC, a rapid, highly sensitive, and efficient method is needed for detecting 5fC. Herein, a novel photoelectrochemical (PEC) biosensor was constructed for 5fC detection, where a MoS2/WS2 nanosheet heterojunction was employed as a photoactive material, amino-functionalized Fe3O4 and SMCC were used as a linker, 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole was adopted as 5fC recognition reagent, and black TiO2 (B-TiO2) was used as a signal amplification unit. Under the optimal experimental conditions, this PEC biosensor showed a wide linear range of 0.01–200 nM and a low detection limit of 2.7 pM (S/N = 3). Due to the specific covalent reaction between −NH2 and −CHO, the biosensor presented high detection sensitivity, even discriminating 5fC with 5-methylcytosine and 5-hydroxymethylcytosine. The biosensor was then applied to investigate the effect of heavy metal Cd2+ on 5fC content in the root, stem, and leaves of maize seedlings.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Jing Yuan,Jiawei Zhu,Ronghua Wang,Yingxiong Deng,Song Zhang,Cong Yao,Yongjian Li,Xinlu Li,Chaohe Xu
In this work, we developed a drop coating-freeze drying-thermal reduction method to prepare ultrathin MoS 2 nanosheets/graphene hybrid aerogels on a carbon fiber paper substrate (MoS 2 /GS-A), which is simpler, more efficient and easier to amplify than conventional hydrothermal or chemical vapor deposition (CVD) methods. More importantly, the preparation of aerogels and electrode is completed simultaneously, which not only greatly simplifies the traditional electrode preparation but also avoids the damage of aerogel structure caused by grinding, so as to construct a long-range three-dimensional connected conductive network and porous structure at the electrode level. Benefitting from the superb electronic and ionic transport kinetics across the whole electrode, the electrode delivered an ultra large capacity of 1709 mAh g −1 at 0.2 A g −1 and remarkable rate capability of 1384 and 865 mAh g −1 at current densities of 0.6 and 1.0 A g −1 in lithium-ion batteries. Moreover, the electrode also exhibited outstanding sodium-ion storage capacity, and a stable charge capacity of 850 mAh g −1 was retained after 100 cycles under 0.1 A g −1 .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Yusi Tian,Minghua Zhou,Yuwei Pan,Xuedong Du,Qi Wang
Molybdenum sulfide (MoS 2 ) was for the first time used as a co-catalyst to enhance the performance of Fe 0 based heterogeneous electro-Fenton (Fe 0 -EF) process for the degradation of sulfamethazine (SMT), which was belonging to the sulfonamide family and extensively used as growth promoters and antibacterial drugs. Compared with Fe 0 -EF process, MoS 2 /Fe 0 -EF process could enhance the rate constant of SMT degradation 2 times under the optimal conditions of current 50 mA, MoS 2 dosage 0.02 g L -1 , Fe 0 dosage 0.224 g L -1 , and initial pH 4, in which SMT could be completely degraded within 10 min while 42% TOC could be achieved after 60 min reaction. The role of MoS 2 as co-catalyst in MoS 2 /Fe 0 -EF process and Fe 2+ /Fe 3+ cycle was supported by iron elemental analysis, transmission election microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) characterizations. Owing to the characteristics of co-catalysis, MoS 2 could greatly facilitate the Fe 3+ /Fe 2+ recycle reaction by the exposed Mo 4+ active sites, which significantly promoted the decomposition of H 2 O 2 that generated in Fe 0 -EF system and improved the generation of hydroxyl radical. Besides, a possible degradation pathway of SMT was proposed and the stability of MoS 2 /Fe 0 -EF process for SMT removal and TOC mineralization was certified base on five consecutive runs. The real wastewater test and energy consumption and economic analysis confirmed its advantage and cost-effectiveness for application. In all, this study provides a new perspective for improving heterogeneous Fe 0 -EF process with MoS 2 for highly efficient and rapid degradation of antibiotics.
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高影响因子
Surfaces and Interfaces
·
2023
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IF 6.2
Anhua Ren,Min Kang,Xiuqing Fu,Fan Zhang,Wanting Yang,Tianyu Pan
This work aims to improve nanoparticle agglomeration, which hinders the application of nanoparticles in enhancing coating properties. Superhydrophobic and corrosion-resistant Ni–B– MoS 2 @WC composite coatings were prepared with the help of a simple and inexpensive combination of hydrothermal and electrodeposition techniques. Hydrothermal treatment at 180°C for 24h greatly reduced the specific surface area and improved the hydrophobicity of WC@MoS 2 powder. The WC@MoS 2 powder showed good dispersion stability in the electrolyte solution. Ni–B/WC@MoS 2 composite coatings were prepared through codeposition with metallic Ni 2+ under the action of ultrasonic waves. WC@MoS 2 powder doping induced the coatings to exhibit a selective orientation of the (111) crystal plane. Ultrasound-induced cavitation increased the participation of nanopowders in the adsorption codeposition of Ni ions. After WC@MoS 2 powder doping, the surface roughness of the prepared composite coatings furthered significantly, facilitating the wettability transition. This work investigated the relationship between the surface wettability of the coatings prepared via jet electrodeposition and WC@MoS 2 powder doping under auxiliary ultrasonic power. In addition, the effect of surface hydrophobicity on corrosion resistance was examined through electrochemical corrosion tests. The enhanced corrosion resistance of the composite coatings benefits from their enhanced surface roughness and superhydrophobicity. This research offers a proven strategy for improving nanopowders' wettability and composite coatings' corrosion resistance.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yuqiang Ma,Zihang Zhao,Cong Zhang,Yijing Zhang,Chi Zhang,Jiachen Li,Ming Xu,Haixia Ma
Overall water splitting (OWS) involves two important half-reactions, namely hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). However, due to the high theoretical overpotential of OER, OWS needs to be realized with high energy consumption. Using anodic oxidation reaction with lower theoretical potential to replace oxygen evolution reaction (OER) can effectively reduce the energy consumption of overall water splitting (OWS) for hydrogen production. Here, we introduce a new oxidation reaction of green electrosynthesis of energetic materials (EMs) and coupled with OWS. The catalyst was prepared by electrodepositing Pt nanoparticles (Pt NPs) and Pt single atoms (Pt SAs) on MoS 2 nanosheets, which drives highly-efficient hydrogen production of 35.6 mV to drive 10 mA cm −2 . DFT calculations reveal the synergistic mechanism of Pt NPs and Pt SA/MoS 2 substrate for promoting hydrogen production, is that the energy barrier of water dissociation was reduced on the Pt NC sites and the produced H* migrated to the adjacent S sites for Heyrovsky step, while the Pt SA sites served as electron regulator for more thermoneutral H* adsorption on S sites, realizing the synergistic reaction kinetics in MoS 2 /Pt for promoting alkaline HER. Importantly, by integrating the OWS and electrosynthesis of 5,5′-azotetrazole (ZT) EMs, the cell voltage can be significantly reduced to 1.29 V at 10 mA cm −2 , realizing low-energy-consumption for hydrogen production. Meanwhile, the green electrosynthesis of ZT is achieved to avoid the hazardous process of traditional preparation methods. This study presents a new strategy for green electrosynthesis of EMs and low-energy-consumption hydrogen production.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Xiaoqin Wei,Hao Guo,Mingyue Wang,Zongyan Lu,Zeyun Yang,Lei Sun,Zhiguo Yu,Yinsheng Liu,Wu Yang
The detection of acetaminophen (ACOP) and its toxic hydrolyzed product p-aminophenol (4-AP) is very significant for clinical diagnosis and quality control of drug formulation. In this study, a novel electrochemical sensor based on MoS 2 embedding triangular Ag nanoplates (Tri-AgNPs) coated MOF-808 was developed for simultaneous and sensitive detection of ACOP and 4-AP. The morphology and structure MOF-808@MoS 2 /Tri-AgNPs nanocomposite were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and so on. The electrochemical and electrocatalytic properties of the composite electrode were evaluated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The experimental results demonstrated that the constructed sensor had excellent electrochemical performance for ACOP and 4-AP detection due to the synergistic interaction among MOF-808, MoS 2 and Tri-AgNPs. The proposed sensor exhibited a wide linear range (1–450 μM) and low limits of detection for detection of ACOP (0.054 μM) and 4-AP (0.046 μM). At the same time, the sensor also showed outstanding repeatability, reproducibility, stability and selectivity . In addition, MOF-808@MoS 2 /Tri-AgNPs/GCE was also employed to determine ACOP and 4-AP in acetaminophen tablets and Yellow River water samples with satisfactory recovery rates, which indicated the feasibility of the developed electrochemical sensor in the actual sample analysis.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 14
·6958-6966
·
IF 3.3
Xingyu Zhan,Hao Zhang,Yunxiong Zeng,Jingcai Xu,Ao Jin,Xinqing Wang,Jing Li,Yanting Yang,Bo Hong
Graphitic carbon nitride (CN) is considered to be a promising metal-free photocatalyst, but the charge carrier separation and rapid complexation of electrons and holes are difficult to modulate for effective and comprehensive photodegradation of TC. In this work, a MoS2 QD decorated sea-urchin carbon nitride nanohybrid was prepared via a water bath method. In comparison to the 85.6% degradation efficiency of sole sea-urchin carbon nitride (SUCN), the optimized 5% MoS2 QDs/SUCN (5%MSUCN) demonstrated a removal efficiency of 96.0% towards aqueous tetracycline (TC) under visible light. Such an outstanding photoactivity was mainly attributed to the interfacial synergistic effect of MoS2 QDs and SUCN, in which the outstanding charge extraction ability and quick surface kinetics of MoS2 QDs were primarily accountable for the subsequent deep photodegradation behavior of 5%MSUCN. A series of factors that may affect photoactivity of 5%MSUCN include pH values, inorganic ions, and organic matter. Finally, the deep photodegradation mechanisms of TC and intermediates were proposed based on ex situ HPLC-MS. This work not only explains the deep decomposition of TC but also presents a facile approach for designing and manufacturing carbon nitride nanohybrids.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
·
IF 22.1
Changhui Zhou,Jinhua Li,Yan Zhang,Jing Bai,Pengbo Wang,Bo Zhang,Lina Zha,Mingce Long,Baoxue Zhou
Sulfurous and nitrogenous oxides, including NO x and SO 2 , and the generated substances NO x - and SO 3 2- widely exist in air and water as pollutants and thus are difficult to control in the environment. In this study, we designed a novel photoelectrocatalytic (PEC) system for the efficient conversion of SO 2 and NO x in mixed gases and NO x - and SO 3 2- in wastewater to N 2 and SO 4 2- , respectively, by activating SO 3 2- to form SO 3 • - . The key ideas include the conversion of SO 3 2- from SO 2 and efficient activation of SO 3 2- into SO 3 • - and further conversion into SO 4 • - by the MoS 2 /Fe 2 O 3 photoanode. Simultaneously, NO 3 - /NO 2 - originating from NO x was rapidly reduced to NH 4 + on the CuNW@CF cathode. Ultimately, the generated NH 4 + was selectively oxidized to N 2 by SO 4 • - and SO 4 • - was reduced to SO 4 2- . The results indicated that 99.9 % of TN was removed and 100 % of SO 3 2- was converted to harmless SO 4 2- . This study provides new insights into the treatment of sulfurous and nitrogenous oxides in air and water.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Riyue Ge,Wenxian Li,Juanjuan Huo,Ting Liao,Ningyan Cheng,Yi Du,Mingyuan Zhu,Ying Li,Jiujun Zhang
Efficient photo-electrocatalysts for hydrogen evolution reaction (HER) are synthesized using a facile one-step hydrothermal method. With metal-ion bridges, highly dispersed molybdenum disulfide (MoS 2 ) nanolayers are vertically grown on the reduced graphene oxide (RGO) to form RGO-M-MoS 2 photocatalysts for HER, where M = Fe 3+ , Co 2+ , Ni 2+ , Cu 2+ and Zn 2+ . The results show that the cross-bridging ions can modulate the MoS 2 growth priority and act as efficient charge transfer channels between RGO and MoS 2 , and combine the advantages of the high conductivity of graphene with the photo-electrochemical activity of MoS 2 . The metal-ion bridged MoS 2 -M-RGO heterostructures demonstrate superior catalytic activity toward hydrogen evolution reaction in acid medium, evidenced by the remarkable higher catalytic current density at low overpotential compared with that of MoS 2 -RGO without metal-ion bridge. This study provides a novel and facile route for establishing efficient composite photo-electrocatalysts for water splitting to generate hydrogen.
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高影响因子
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