INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Dexuan Li,Guoshen Zeng,Yaoyao Wu,Zhenyu Zhou,Wei Guo,Chuanhao Li
The co-catalysts engineering, especially the non-noble traditional metal dichalcogenides (MoS 2 ), is a promising strategy in promoting photocatalytic water splitting for the green hydrogen gas production. Herein, we constructed a novel Au induced 1T-MoS 2 modified S-doped-g-C 3 N 4 (denoted as MASCN) photocatalyst . The experimental and characterizations results have showed that the sulfur doped g-C 3 N 4 (SCN) could increase the dispersity of the Au nanoparticles (NPs) and help to improve the combination between SCN and Au NPs to promote electrical conductivity . More importantly, ultra-stable 1T-MoS 2 was in situ formed within the induction of Au nanoparticles (NPs), thus providing high-density active sites and decreasing the interfacial charge transfer. As a result, the optimal sample exhibits a drastically enhanced photocatalytic hydrogen evolution rate (HER) of 4708.3 μmol/g/h, over 87-fold the rate of pure SCN (54 μmol/g/h) and appropriately 25-fold the rate of MoS 2 modified SCN (denoted as MSCN) (185 μmol/g/h). The hybrids also manifest excellent stability and durability in cycle. This study highlights the construction strategy of MoS 2 based co-catalyst for solar water splitting reactions and may provide insightful understandings for other photocatalytic applications.
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 29
·17154-17162
·
IF 3.119
Ang Li,Yuxiang Liu,Xuejun Xu,Yuanyuan Zhang,Zhichun Si,Xiaodong Wu,Rui Ran,Duan Weng
Constructing Z-scheme heterojunctions is considered as an effective strategy to obtain catalysts of high efficiency in electron–hole separation in photocatalysis. Unfortunately, suitable heterojunctions are difficult to fabricate because the direct interaction between two semiconductors may lead to unpredictable negative effects such as electron scattering or electron trapping due to the existence of defects which causes the formation of new substances. Furthermore, the van der Waals contact between two semiconductors also results in bad electron diffusion. In this work, a MOF-derived carbon material as a Z-scheme photocatalyst was synthesized via one-step thermal treatment of MoS2 dots @Fe-MOF (MIL-101). Under visible light irradiation, the well-constructed Z-scheme (MoS2, γ-Fe2O3)/graphene photocatalyst shows 2-fold photocatalytic oxygen evolution activity (4400 μmol g−1 h−1) compared to that of γ-Fe2O3/graphene (2053 μmol g−1 h−1). Based on ultraviolet photoelectron spectrometry (UPS), Mott–Schottky plot, photocurrent and photoluminescence spectroscopy (PL) results, the photo-induced electrons from the conduction band of γ-Fe2O3 could transport quickly to the valence band of MoS2 via highly conductive graphene as an electron transport channel, which could significantly enhance the electron–hole separation efficiency as well as photocatalytic performance.
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 8
·1395-1403
·
IF 3.117
Jie Ren,Hui Zong,Yuyun Sun,Shijing Gong,Yu Feng,Zhenguo Wang,Le Hu,Ke Yu,Ziqiang Zhu
Two-dimensional molybdenum carbides belong to a novel family of 2D transition metal carbides/nitrides called MXenes, which have a wide range of electrochemical applications. However, the synergistic catalysis of transition metal carbides and disulfides has not been studied in depth. A strategy was proposed to prepare a 2D organ-like Mo2C MXene matrix derived from Mo2Ga2C crystals, coupled with MoS2 nanoflowers to explore the hydrogen evolution reaction (HER) of molybdenum carbides and disulfides. Compared with Mo2CTx (where Tx means F, O, and OH surface terminations) Mxene catalysts, MoS2@Mo2CTx nanohybrids showed significantly enhanced HER activity, with a low overpotential of 176 mV in alkaline media at a current density of 10 mA cm−2 and a very small overpotential of 26 Ω. Density functional theory calculations indicated that the reduction of the hydrogen adsorption energy of the MoS2@Mo2CTx nanohybrids could be attributed to fast electron transport ensured by Mo2CTx with intrinsic conductivity and a large number of hydrogen adsorption sites provided by MoS2 nanoflowers. The synthetic method is promising to tailor the specific properties by preparing organ-like molybdenum carbides coupled with MoS2 nanoflowers.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Yuting Xu,Shaoqi Zhou,Meng Li
Increasing efforts have been devoted to enhancing the cathode activity towards oxygen reduction and improve power generation of air breathing microbial fuel cells . Exploring non-precious metal and highly active cathodic catalyst plays a key role in improving cathode performance. Our work aims to investigate the electrocatalyst behavior and power output of the single-chamber MFC equipped with carbon nanotubes hybridized molybdenum disulfide nanocomposites (CNT/MoS 2 ) cathode. MoS 2 nanosheets embedded into the CNTs network structure is synthesized by a facile hydrothermal method . The CNT/MoS 2 -MFC achieves a maximum power density of 53.0 mW m −2 , which is much higher than those MFCs with pure CNTs (21.4 mW m −2 ) or solely MoS 2 (14.4 mW m −2 ) cathode. The oxygen reduction reaction (ORR) test also demonstrates a promoted electrocatalytic activity of synthesized material , which may be attributed to the special interlaced structure and abundant oxygen chemisorption sites of CNT/MoS 2 . Such CNTs-based noble-metal-free catalyst presents a new approach to the application of MFCs cathode materials .
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Kai Zhao,Yalan Feng,Zisheng Zhang,Hong Li,Xin Gao,Shuanglong Lin
Enhancing spatial charge separation is an efficient strategy for the improvement of photocatalytic performance. Herein, an ammonia synthesis approach was proposed with an in-situ grown ternary GO/MoS 2 /Ag 3 PO 4 Z-scheme heterostructure photocatalytic system to promote spatial charge separation at surface & interface. Owing to the decent electrical and thermal conductivity properties of GO, ternary photocatalyst delivered evidently enlarged surface area, promoted spatial charges separation and significantly enhanced N 2 photo-fixation efficiency under irradiation of visible light. Through the synergistic effect of electron transportation on GO and the efficient separation of electron-hole pairs on heterojunction, the transportation and separation of photo-generated charges can be realized on both surface and interface, leading to better harvest and utilization of light illumination. The possible Z-scheme heterostructure mechanism for N 2 photo-fixation reaction was explored, which not only offers a new approach for design of heterostructure photocatalysis system but also provides a novel strategy for enhanced spatial charges separation.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Hui Wang,Xiangqiong Zeng,Libin Pang,Haihang Wang,Bocai Lin,Zhengwei Deng,Edwina Lau Xiu Qi,Na Miao,Deping Wang,Peng Huang,Haoran Hu,Jiusheng Li
Malignant bone tumors have caused great obstacles and serious illnesses for tumor recurrence and difficulty in reconstructing and repairing large defects after tumorectomy. Additionally, long-term efficacy, satisfactory biocompatibility and excellent properties for anti-tumor agents are necessary in the biomedical field. To solve these problems, a novel idea has been proposed on building an integrative anti-tumor/bone repairing scaffold by covering photothermal therapy (PTT) composite MoS 2 -PLGA film on the surface of borosilicate bioactive glass (BG). In our study, the MoS 2 -integrated composite BG (BGM) scaffolds can rapidly and effectively elevate temperature, and they exhibited excellent photothermal stability, under 808 nm laser irradiation. Notably, the BGM scaffolds can effectively reduce the viability of osteosarcoma cells (MNNG/HOS) in vitro as well as inhibit the tumor growth in nude mice. Furthermore, the prepared BGM scaffolds can stimulate the proliferation and differentiation of rat bone mesenchymal stem cells (rBMSCs), upregulate the expression of osteogenesis-related genes (Runx-2, OCN and Col-I) in vitro and promote in vivo bone repair in critical-sized rat calvarial defects. Therefore, the novel MoS 2 -integrated composite BG scaffolds are highly promising for the treatment of tumor-related bone defects, offering ideas for the manufacture of new materials in the tissue engineering field.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xu Zhang,Wei Zhang,Lang Ran,Xiangyu Wang,Binze Zou,Lincheng Zhou
A novel non-woven carbon fiber sheet-supported FeSe 2 and MoS 2 -loaded Fenton catalyst (MoS 2 @FeSe 2 @CFS) was synthesized by a two-step hydrothermal process. The MoS 2 @FeSe 2 @CFS exhibited an excellent performance on hydrogen peroxide (H 2 O 2 ) activation at different conditions. Removal efficiency of methylene blue (MB) reached 99.7% within 20 min and the rate constant was higher than those of the most reported iron-containing catalyst/H 2 O 2 systems for MB degradation. The possible activation mechanism of H 2 O 2 by MoS 2 @FeSe 2 @CFS in heterogeneous system was proposed·H 2 O 2 was activated to ·OH by Fe 2+ , and generated Fe 3+ was reduced to Fe 2+ by Mo 4+ . Besides, MoS 2 has great adsorption performance and can aggregate MB near the catalyst, shortening the mass transfer distance. Therefore, the heterogeneous Fenton catalyst MoS 2 @FeSe 2 @CFS has excellent catalytic property. Notably, it was discovered that S might participate in the Fe 3+ /Fe 2+ cycle, which has not been reported in literature. Moreover, MoS 2 @FeSe 2 @CFS have good long-term stability and repeatability because of its high strength and chemical durability. Overall, this work expands the environmental application of iron-containing catalyst and provides a promising heterogeneous Fenton system for removal of contaminants from water.
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Zhixiang Li,Kunhong Hu,Yong Xu,Enzhu Hu,Xianguo Hu
A novel method was proposed to improve the dispersion and lubrication of nano-MoS 2 in ester oil. The synthesis of di-n-butyl adipate (DBA) was catalyzed at 145 °C using spherical nano-MoS 2 /sericite (S-MoS 2 /sericite), and the esterification rate reached 95.4%. After the reaction, S-MoS 2 /sericite remained in DBA with a content of ~400 mg/L, and the dispersion system could be stored stably for at least 45 days. Compared with the pure DBA, after standing for 45 days, the dispersion system reduced friction by ~16% and wear by ~72%. At high load and low speed, a tribofilm containing MoS 2 was formed at the ridge of furrow; at low load and high speed, S-MoS 2 /sericite was embedded in the soft surface to lubricate the friction pair .
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yiying Yue,Shuting Shen,Wanli Cheng,Guangping Han,Qinglin Wu,Jianchun Jiang
A novel photocatalytic hydrogel was prepared by the direct coagulation casting of CdS/MoS 2 /Montmorillonite (CMMt) and TEMPO-oxidized cellulose nanofiber (TOCN)-mediated polyacrylamide (PAM). The extremely high specific surface area of CdS/MoS 2 /Mt and the three-dimensional network-structured PAM-TOCN matrix contributed to the adsorption of tetracycline (TC) in wastewater treatment . The effect of the initial pH on the degradation of TC by PAM-TOCN-CMMt was analyzed, and its degradation rate reached 90.03% in 120 min at pH 7.5. In addition to being a visible-light-driven catalyst, CdS/MoS 2 /Mt acts as a reinforcing agent, and the tensile stress of PAM-TOCN-CMMt increased by 41% compared with that of PAM-TOCN. The compressive strength of TOCN-PAM-CMMt at an 80% strain level was 65% higher than that of PAM-TOCN. Thus, PAM-TOCN-CMMt, with high mechanical strength , offers multiple separations and recycling, and the TC removal rate is still more than 70.5% after five cycles. Moreover, the mechanism of TC degradation was proposed based on the photoelectric performance. The strong interaction between the CdS/MoS 2 heterojunction and the electronegative Mt is conducive to the effective separation and transportation of photogenerated electrons. The prepared nanocomposite hydrogels with a desirable catalytic degradation rate, mechanical strength, environmental friendliness , and recyclability are promising for the photodegradation of antibiotics.
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高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Yu Fu,Renhong Song,Kun Zhang,Yujun Chen,Lijun Chen,Qianqiu Tian,Wenbin Hu
Transition-metal sulfides (TMSs) are promising cathode materials for all-solid-state lithium batteries (ASSLBs) but suffer from poor electronic conductivity and severe volume expansion. We developed MoS 2 /C nanospheres featuring expanded interlayer spacing (0.71 nm) through facile hydrothermal synthesis. The radially arranged nanosheet architecture maximizes electrochemically active edge sites, while the expanded interlayers enhance Li + diffusion kinetics. The in-situ formed carbon layer provides dual benefits: structural confinement to suppress volume changes and improved electronic conductivity. The MoS 2 /C nanospheres deliver exceptional capacity of 385.1 mAh g −1 after 250 cycles at 1C, substantially outperforming bulk MoS 2 and MoS 2 nanosheets. This synergistic design combining interlayer expansion, hierarchical morphology, and carbon confinement establishes an effective strategy for high-performance ASSLBs cathodes.
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产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Zekun Guan,Minmin Wang,Guangxun Sun,Xin Xue,Yanfei Chen,Yu Zhang,Ting Zhao,Hongfu Shi,Chao Feng,Yuan Pan,Yunqi Liu
In the period of energy conversion, the effective utilization of fossil fuels and the development of new energy sources are becoming extremely imperative. MoS 2 have excellent catalytic activity for fuel hydrogenation and hydrogen production. However, the synthesis of highly dispersed MoS 2 that can expose more active sites has been challenging. Herein, (DODA) 6 Mo 7 O 24 with organic–inorganic core–shell structure was prepared by POMs-ILs (polyoxometalates-ionic liquids) self-assembly. MoS 2 with adjustable size and layer structure derived from (DODA) 6 Mo 7 O 24 by controllable confined-sulfidation effect for hydrogenation and hydrogen evolution reaction (HER). Among them, MoS 2 (T 280 S 1:4 t 30 ) has the lowest overpotential, and only 200 mV is needed to reach the current density of 10 mA·cm −2 . At the same time, it has the optimal hydrogenation performance with the highest selectivity for octahydroanthracene and perhydroanthracene, along with a hydrogenation percentage of 48.04 % in the process of anthracene hydrogenation. Density functional theory demonstrated that the monolayer MoS 2 was more favorable for water molecule dissociation and hydrogen molecule activation, which proves that the MoS 2 has excellent catalytic activity for HER and hydrogenation simultaneously. This work is instructive for the synthesis of MoS 2 and its application in HER and hydrogenation.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Xiao Zheng,Xiaodong Zhang,Yanpeng Cai,Shan Zhao,Shuguang Wang
Photocatalyst activated peroxymonosulfate (PMS) under visible-light irradiation to construct a photo-Fenton system has shown great application prospect for environmental remediation. In this study, MoS 2 /BiVO 4 heterojunction nanoflowers were successfully synthesized by hydrothermal method and used to activate PMS under visible-light to achieve highly efficient degradation of bisphenol A (BPA). The constructed heterojunction showed excellent catalytic activity , which was attributed to the synergistic effect of effective separation of charge carriers and PMS activation . In the MoS 2 /BiVO 4 /PMS/vis system, 2-MoS 2 /BiVO 4 (2-MB) exhibited the highest degradation rate constant for BPA (0.1747 min −1 ), which was 91.9 times of pure MoS 2 and 38.0 times of pure BiVO 4 , respectively. The electron paramagnetic resonance (EPR) and radical quenching experiments demonstrated that the oxidative degradation of BPA was mainly participated by SO 4 − , OH, 1 O 2 and h + active species. Through the analysis of energy band structure and element valence state of photocatalyst and the identification of reaction intermediates, the degradation mechanism and degradation pathways were proposed. In addition, MoS 2 /BiVO 4 heterojunction showed high catalytic ability for various organic pollutants (herbicides, pesticide intermediates, antibiotics and dyes), and common anions (Cl − , SO 4 2− and NO 3 − ) and humic acid (HA) had little effect on its degradation efficiency. This study has provided a new solution for the use of heterojunction photocatalysts for visible-light assisted PMS activation to achieve highly efficient degradation of organic pollutants.
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高影响因子
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