CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xueyao Wang,Shuai Liu,Lihui Huang,Ting Sun,Lingshuai Kong,Zhenhui Gao,Rongbing Fu,Yu Xiao
Utilizing molybdenum disulfide (MoS 2 ) based catalysts for piezoelectric-catalyzed degradation of organic pollutants in water has been widely investigated as a promising route. Although favorable results have been obtained, H 2 O 2 produced during the catalytic process was neglected and not effectively utilized. Therefore, a hypothesis was proposed to introduce exogenous metal elements for the post-modification of MoS 2 , and the Fenton-like reaction carried out between the exogenous metal and the in situ generated H 2 O 2 , which successfully constructed a Piezocatalytic Fenton (PF) system. In this work, a novel MoS 2 -based piezoelectric material, M−MoS 2 (M = Fe, Zn, Cu, Ni, Co), has been developed for PF reactions. Fe-MoS 2 had the most excellent piezocatalytic performance with norfloxacin (NOR) as the target pollutant, with a removal rate of 93.2 % within 5 min. The performance enhancement could be attributed to the change in morphology and structure. Fe element uniformly distributed on minor size 1T/3R phases MoS 2 , which had high carrier concentration and conductivity with in-plane and out-of-plane piezoelectricity. PFM tested that Fe-MoS 2 had a 10 times larger piezoelectric coefficient than MoS 2 . Such outstanding performance was achieved by innergenerated-hydrogen peroxide (H 2 O 2 ) and simultaneous effective activation and generating reactive oxygen species (ROSs) from oxygen and water via piezoelectric catalysis. Fe ions rapidly underwent a Fenton-like reaction with H 2 O 2 , Mo, and Fe ions valence states keep transforming and efficiently utilized H 2 O 2 . Non-radicals and radicals synergistically drove the degradation process, with 1 O 2 as the main active species. The MoS 2 modification strategy proposed in this work effectively improved the conversion of H 2 O 2 for efficient energy utilization and provided a theoretical basis for green and energy-saving piezocatalytic technology.
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Science China-Physics Mechanics & Astronomy
·
2021
·Vol. 64
·期 10
·1-7
·
IF 5.122
Sun Baofan,Chen Jiajun,Zhou Xinyi,Liu Min,Wu Yaping,Xia Yuanzheng,Li Xu,Wu Zhiming,Kang Junyong
Heterostructures based on two-dimensional (2D) transition-metal dichalcogenides (TMDCs) possess unique electronic and optical properties, which open up unprecedented opportunities in nanoscale optoelectronic devices. Synthesizing high-quality 2D TMDC heterostructures with different core/shell size ratios is of great significance for practical applications. Here, we report a simple one-step chemical vapor deposition (CVD) method for fabricating MoS 2 /WS 2 lateral heterostructures with controllable core/shell size ratio. An ultrathin MoO 3 /WO 3 film prepared by thermal evaporation was used as the precursor, and a step-like heating process was adopted to separately grow MoS 2 and WS 2 monolayers by taking advantage of the different melting points of MoO 3 and WO 3 sources. High-quality MoS 2 /WS 2 lateral heterostructures with sharp interfaces were fabricated by optimizing the key growth parameters. Furthermore, the core/shell size ratio of heterostructures could be easily controlled by changing the thickness ratio of MoO 3 /WO 3 film, and an approximately linear dependence between them is revealed. Compared with MoS 2 or WS 2 monolayers, the MoS 2 /WS 2 heterostructure exhibited a shortened exciton lifetime owing to the type-II energy band alignment, which is conducive to the application of high-performance devices. This work provides a facile strategy for the synthesis of 2D lateral heterostructures with controllable size ratio.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2019
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IF 5.04
Peng Zhang,Qiang Ru,Honglin Yan,Xianhua Hou,Fuming Chen,Shejun Hu,Lingzhi Zhao
A hierarchically 3D structured milled lamellar MoS 2 /nano-silicon@carbon hybrid with medium capacity and long-term lifespan is designed by a green and scalable approach using ball milling process and spray-drying/pyrolysis routes. The microspheres consist of low-content nano-silicon (20 wt%), milled lamellar MoS 2 sheets and porous carbon skeletons. A mixture of silicon nanoparticles and MoS 2 flakes serves as an inner core, while porous carbon pyrolyzed from petroleum pitch acts as a protective shell. The particular architecture affords robust mechanical support, abundant buffering space and enhanced electrical conductivity , thus effectively accommodating drastic volume variation during repetitive Li + intercalation/extraction. The Si/MoS 2 @C hybrid delivers a high initial discharge specific capacity of 1257.8 mA h g −1 and exhibits a reversible capacity of 767.52 mA h g −1 at a current density 100 mA g -1 after 250 cycles. Most impressively, the electrode depicts a superior long-cycling durability with a discharge capacity of 537.6 mA h g −1 even after 1200 cycles at a current density of 500 mA g -1 . Meanwhile, the hybrid also shows excellent rate performance such as 388.1 mA h g −1 even at a large current density of 3000 mA g -1 .
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TALANTA
·
2025
·
IF 6.1
Yingjiao Zhai,Yu Zhang,Fujun Liu,Wenhui Fang,Jinhua Li,Mingze Xu,Shuming Chen,Hao Zeng
Colorimetric/surface-enhanced Raman scattering (SERS) dual-mode detection offers richer detection information and higher accuracy. However, achieving “non-enzymatic” one-step catalytic colorimetric/SERS glucose detection using molybdenum disulfide (MoS 2 )-based nanozymes remains challenging. Here, we propose a tandem enzyme system, BAMC, composed of bovine serum albumin-modified gold nanoparticles (BSA@Au) integrated with carboxylated molybdenum disulfide (MoS 2 –COOH). This approach overcomes the inhibition of glucose oxidase (GOx)-like activity caused by Au–S bonding, enabling dual-mode colorimetric/SERS glucose detection with detection limits (LOD) of 10 −6 M and 10 −7 M, respectively. For non-invasive glucose detection, the BAMC system demonstrated excellent stability in saliva and urine samples. The results were highly consistent with commercial glucose detection methods, with errors controlled at 19.67 % and 6.66 %, meeting the World Health Organization ’s standard of less than 20 % error for glucometers. The BAMC system offers a novel approach for non-invasive glucose detection and paves the way for developing other nanozymes.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Juan Wei,Jin-Tao Cheng,Min Luo,Xi Wang,Xiao-Yu Xie,Xian Wu,Wei Shen,Pang-Da Dai,Zong-Yin Song,Meng Yang
Designing a highly sensitive electrochemical sensing interface and elucidating the mechanism of enhanced electrochemical signals from the perspective of electronic structure are crucial for accurate detection of heavy metal ions (HIMIs). In this study, a composite transition metal sulfide Co 9 S 8 @MoS 2 heterostructure was developed for the high-sensitivity detection of Pb(II) in Chinese herbal medicine, which achieved a high sensitivity of 103.3 ± 0.5 μA μM −1 and a detection limit of 0.01 μM. Moreover, the fundamental reason for the excellent detection of Pb(II) was investigated by X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT). The results indicated that the recombination of the heterojunction not only catalyzes the activation of the Co site in Co 9 S 8 but also promotes S as a medium in the electron channel for increased charge transfer. In addition, the proposed method displayed anti-interference ability with outstanding stability and reproducibility in the presence of other HMIs. Importantly, the highly sensitive detection of Pb(II) has also been inherited in herbal Rehmannia glutinosa samples, demonstrating its potential for practical application in the detection of heavy metal ions in Chinese herbal medicine. This work provides essential theoretical guidance for constructing high-performance electrochemically sensitive interfaces from electronic structure-controlled sensing materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Boqiang Gao,Yu Pan,Hu Yang
A constructed MoS 2 /Bi 2 S 3 /BiVO 4 ternary photocatalyst(MBB) mainly with a S-scheme heterostructure was loaded on a 3D lignosulfonate modified poly(vinyl formal) sponge to obtain a novel composite sponge(PLS-MBB) with an enhanced performance in synergistic adsorption and photo-Fenton degradation of various fluoroquinolones(FQs) in water. The synergistic adsorption and photocatalysis of PLS-MBB notably improved the applicable pH from 2.0 to 9.0 and reduced the dosage of Fe 2+ to 0.014 mmol/L in Fenton reaction , which could achieve the degradation efficiency of 92.8 % for FQs within 60.0 min at pH 6.0. The photo-generated electrons by MBB and the redox transformation of Mo(IV)/Mo(VI) and Bi(III)/Bi(V) accelerated the conversion of Fe 3+ to Fe 2+ ; besides, the efficient adsorption of FQs on the sponge carrier promoted the surface degradation in solution, thereby causing an enhanced photo-Fenton reaction. This work provided a novel strategy to improve photo-Fenton reaction and accordingly fabricated a talented material for effective removal of organic contaminants in water.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yanmeng Cai,Yue Wang,Le Zhang,Rongli Fang,Jixiao Wang
Two-dimensional (2D) layered transition-metal carbides (MXenes) are attractive faradic materials for an efficient capacitive deionization (CDI) process owing to their high capacitance, excellent conductivity, and remarkable ion storage capacity. However, the easy restacking property and spontaneous oxidation in solution by the dissolved oxygen of MXenes greatly restrict their further application in the CDI domain. Herein, a three-dimensional (3D) heterostructure (MoS2@MXene) is rationally designed and constructed, integrating the collective advantages of MXene flakes and MoS2 nanosheets through the hydrothermal method. In such a design, the well-dispersed MXene flakes can effectively reduce the aggregation of MoS2 nanosheets, boost electrical conductivity, and provide efficient charge transfer paths. Furthermore, MoS2 nanosheets as the high-capacity interlayer spacer can prevent the self-restacking of MXene flakes and provide more active sites for ion intercalation. Meanwhile, the strong chemical interactions between MXene flakes and MoS2 nanosheets contribute to accelerating the charge transfer kinetics and enhancing structural stability. Consequently, the resulting MoS2@MXene heterostructure electrode possesses high specific capacitance (171.4 F g–1), fast charge transfer and permeation rate, abundant Na+ diffusion channels, and superior electrochemical stability. Moreover, the hybrid CDI cell (AC//MoS2@MXene) with AC as the anode and MoS2@MXene as the cathode delivers outstanding desalination capacity (35.6 mg g–1), rapid desalination rate (2.6 mg g–1 min–1), excellent charge efficiency (90.2%), and good cyclic stability (96% retention rate). Most importantly, the MoS2@MXene electrode can keep good structural integrity after the long-term repeated desalination process due to the effective shielding effect of the MoS2 layer to protect MXenes from being further oxidized. This work presents the flexible structural engineering to realize excellent ion transfer and storage process by constructing the 3D heterostructure.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lu Zhao,Liang Liu,Xiao-Feng Bai,Ai-Yong Zhang,Shu-Chuan Peng,Chi Zhang,Hai-Hong Niu,Heng Liang
Pollutants removal by Fenton-like catalysis is of considerable interest, and the solid catalyst play governing roles. Two-dimensional MoS 2 can activate peroxymonosulfate (PMS) for radical-mediated catalysis via metallic 1T phase and/or crystal defects (i.e., sulfur vacancy). Herein, we explored the significant synergism between defective sulfur vacancy and metallic 1T rather than semiconducting 2H phase for Fenton-like catalysis on MoS 2 . This synergism was substrate-dependent during MoS 2 preparation. A series of sulfur-defected 1T-MoS 2 were prepared by H 2 O 2 oxidation, drastic structural but no morphological changes were measured. The defect-tailored 1T-MoS 2 exhibited a superior Fenton-like reactivity toward PMS activation and pollutant degradation in various water matrices. A 10.0 mg·L -1 of aqueous phenol was completely degraded in one hour, and the corresponding pseudo-first order reaction constant increased more than 12 times after defect engineering. No synergistic effect was measured between sulfur vacancy and semiconducting 2H phase on defective 2H-MoS 2 . Radical-mediated reaction mechanism was identified by ESR, scavenger inhibiting, spectroscopic analysis and electrochemical measurements. Electron transfer was accelerated within metallic 1T phase to favor PMS activation and pollutant degradation on defective sulfur vacancies serving as surface reactive sites. Our findings provided fundamental insights into PMS activation on sulfur vacancy promoted by 1T-MoS 2 in Fenton-like catalysis for water purification.
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ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Zhihuan Zhao,Pengfei Yang,Xiao Zhang,ShashaYang,Jianying Lin,Jimin Fan,Bing Zhang
MoS 2 /C@SiO 2 spheres were successfully synthesized by a one-step hydrothermal method using silica as the template, sodium molybdate as the Mo source and glucose as the carbon precursor. In this paper, the antitumor ability of MoS 2 /C@SiO 2 and C@SiO 2 nanospheres was evaluated through the photothermal effect induced by near infrared (NIR) spectroscopy and the drug loading and release behaviors of the model drug doxorubicin (DOX). The photothermal conversion efficiency (η) of MoS 2 /C@SiO 2 of 42.5% was 1.2 times that of C@SiO 2 (34.7%), which indicated its significant photothermal effect. The drug loading of MoS 2 /C@SiO 2 of 46.5% was much higher than that of C@SiO 2 (12.4%); it was 3.75 times that of C@SiO 2 . The cumulative drug release of MoS 2 /C@SiO 2 and C@SiO 2 under a simulated acidic tumor environment and NIR irradiation was 58.9% and 27.29%, respectively. Moreover, the cell viability assays verified that MoS 2 /C@SiO 2 -DOX had excellent antitumor ability under the co-stimulation of endogenous (pH) and exogenous (NIR) compared with C@SiO 2 -DOX. The experimental results showed that the survival rate of cancer cells in MoS 2 /C@SiO 2 -DOX under coordinated treatment was only 19.4%, while that of C@SiO 2 -DOX was 24.6%.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuan-Sheng Cheng,Yi-Fei Huang,Xin-Yue Wu,Min Ling,Yuwen Cheng,Fang-Hui Wu,Qiyan Xu,Xian-Wen Wei
As a promising alternative to platinum, molybdenum disulfide (MoS 2 ) is widely utilized as catalyst/co-catalyst in hydrogen evolution reaction (HER). However, its inactive basal plane greatly hampers its catalytic activity. Herein, we propose a function-oriented strategy to enhance the catalytic activity of MoS 2 by interfacing with fullerene derivatives, specifically indene-C 60 bisadduct (ICBA). The ICBA-MoS 2 hybrid was then employed as an efficient co-catalyst, in conjunction with CdS, to construct a photocatalyst for solar-driven hydrogen production coupled with the selective oxidation of furfural alcohol (FOL) to furfural (FAL). The optimized 5 % ICBA-MoS 2 /CdS (5 %-IMC) sample exhibits a remarkable H 2 and FAL production rates of 978 and 1160 μmol h −1 g −1 , respectively, which was 2.4 times higher than that of the primitive sample without ICBA modified. This prominent catalytic performance can be attributed to the high activity of synergistic active sites in ICBA-MoS 2 , as well as the speed transportation and separation of the photogenerated charges from CdS to ICBA-MoS 2 , as evidenced by both experimental and theoretical investigations.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 4
·1757-1770
·
IF 3.3
Ling Tao,Jiepu Zhang,Fangke Yu
In this study, in order to achieve efficient activation of persulfate, we added MoS2 as a co-catalyst to the iron, cobalt and nitrogen modified biochar (Fe–Co–N–BC) catalytic system. Analytical methods such as scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) demonstrated that the MoS2/Co–Fe–N–BC catalytic materials were successfully prepared. In the MoS2/Fe–Co–N–BC/PMS system, 97.5% of PFOA was removed within 180 min with Kobs of 0.074 min−1. Composites with different mass ratios of MoS2 and Co–Fe–N–BC/PMS in the non-homogeneous PMS system both exhibit excellent catalytic efficiency for TOC removal. In particular, MoS2/Fe–Co–N–BC obtained extraordinary catalytic efficiency through synergistic radical (SO4˙−, ˙OH) and non-radical (1O2, FeIV and FeV) processes, which was proved by the quenching experiments and the EPR testing. The analysis of the activation mechanism reveals that the three redox ion pairs Fe2+/Fe3+, Co2+/Co3+ and Mo4+/Mo6+ simultaneously participated in the activation of PMS, realizing multi-path electron transfer. And MoS2 played an excellent co-catalysis role in promoting the cycling of the valence states of the ions. Compared to Fe3+ and Co3+, the low valence states of Fe2+ and Co2+ can activate PMS more rapidly and produce more ˙OH and SO4˙−. However, the recycling efficiency of Fe2+ and Co3+ in the Fe–Co–N–BC system is low, and the presence of MoS2 improves the efficiency of Fe3+ and Co3+ reduction to Fe2+ and Co2+, respectively. The possible degradation pathways of PFOA were proposed. This study provides some references for the design of polymetallic-doped catalysts to degrade difficult-to-degrade organic pollutants.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Hainan Wei,Fanming Meng,Han Zhang,Wenqing Yu,Jialong Li,Sheng Yao
Constructing new photocatalysts for the photocatalytic reduction of CO 2 and efficient degradation of Levofloxacin is of great importance to renewable energy. Here, S-scheme Bi 2 MoO 6- x /MoS 2 heterojunction nanospheres containing abundant surface defects (oxygen vacancies) were designed and successfully synthesized to enhance CO 2 photoreduction activity in the absence of other sacrificial agents, co-catalysts or photosensitisers. At the same time, it can efficiently degrade organic pollutants (Levofloxacin). This heterogeneous structure with surface defects provides an abundance of reactive sites, accelerates charge separation and improves oxidation capacity. The improved Bi 2 MoO 6- x /MoS 2 heterogeneous nanospheres show excellent performance under simulated solar light, with the selectivity and yield of 92.45% and 29.01 µmol h −1 , respectively, for the generation of CO. Under visible light, the degradation efficiency of levofloxacin hydrochloride (LVX) reached 96.3% within 25 min and remained as high as 95% after three cycles. This work provides a new idea for the design of new S-scheme photocatalysts and an important reference for the preparation of photocatalysts for the efficient photocatalytic reduction of CO 2 and the efficient degradation of organic pollutants at the same time.
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