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.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Shengda Luo,Shuying Dong,Chen Lu,Chongfei Yu,Yiwen Ou,Lan Luo,Jingyu Sun,Jianhui Sun
Two-dimensional transition metal dichalcogenides (2D TMDs) and their heterostructures have by far stimulated growing research interests in the field of optoelectronics and photocatalysis . In this regard, scalable fabrication of 2D TMDs at an environmentally-benign and cost-effective manner via liquid phase exfoliation is a particularly fascinating concept. Herein we report a facile and green strategy to produce few-layered WS 2 suspensions at a large scale by a direct exfoliation of commercial WS 2 powders in water-ethanol mixtures. In turn, by making full use of the features of 2D layered WS 2 , a novel 2D WS 2 /MoS 2 composite was constructed for the first time via an in-situ hydrothermal reaction to grow MoS 2 nanoflakes onto few-layered WS 2 basal planes. The as-obtained WS 2 /MoS 2 heterostructure was investigated for photocatalytic applications. Such a hybrid material demonstrated superior photocatalytic activity in the photocatalysis of organic dye molecules relative to that of pristine 2D WS 2 , MoS 2 and their physical mixtures. This enhancement was associated with the 2D WS 2 /MoS 2 heterostructuring effect. In addition, comparisons of the photocatalytic performances of our heterojunctions with those of recently reported 2D TMD-based hybrid materials manifested a significantly higher efficiency.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yifeng Lan,Yingqi Ma,Yingwen Xu,Yuan Zhang,Rujia Deng,Lulu Liu,Boya Hou,Haiyan Cui,Keming Yun,Zhiwen Wei,Yanli Wei
Effective truncation and mutation can obtain highly active nucleic acid aptamers for the target, especially avoiding non-specific binding, uncertainty to the tertiary structure and low binding affinity of the lengthy aptamer. In this work, a new aptamer, T-AF28 (28 nt) with better affinity to AFB1 was obtained by truncating 22 bases and mutating 3 bases of the reported AFB1 aptamer (50 nt), and the thermodynamic information, structural changes and binding domains of aptamer T-AF28 in the presence of AFB1 or AFM1 were further investigated by isothermal titration calorimetry, circular dichroism, and molecular dynamics. On this basis, Using optimized aptamers as recognition elements, a novel label-free and enzyme-free fluorescent aptasensor for AFB1 and AFM1 was developed by synergistic amplification effect of hybridization chain reaction (HCR) coupled molybdenum disulfide nanosheets and copper nanoparticles in situ synthesized (CuNPs) on an extra-long double-stranded template generated by HCR as the fluorescent probe. Under the optimal experimental conditions, sensitive and selective fluorescent detection of AFB1 and AFM1 was achieved with wide linear detection ranges of 0.030 ng/mL-46.8 ng/mL and 0.030 ng/mL-32.8 ng/mL, respectively. And this aptasensor can be applied to accurate detection of AFB1 and AFM1 in grains, edible oil, tea, and milk with the recovery in the range of 85.20 %-117.0 %. This work not only provides a theoretical basis for the design of AFB1 and AFM1 aptasensors and expands the application of AFB1 aptasensors in the field of food safety, but also breaks a new path for the development of HCR-MoS 2 Ns CuNPs aptasensors.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 84
·80595-80603
·
IF 3.289
Yang Rong,Liang Tang,Yahui Song,Shengnan Wei,Zhaohong Zhang,Jun Wang
A new visible-light-sensitive photocatalyst, Er3+:Y3Al5O12/MoS2–NaTaO3–PdS, was prepared by hydrothermal, liquid boiling and deposition methods. The prepared photocatalysts were all characterized using an X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The photocatalytic activity of the prepared photocatalysts was evaluated via photocatalytic degradation of amaranth as a refractory pollutant with simultaneous hydrogen evolution under visible-light irradiation. Moreover, the effects of the visible-light irradiation time and molar ratio of Er3+:Y3Al5O12 and NaTaO3 on the photocatalytic capability of Er3+:Y3Al5O12/MoS2–NaTaO3–PdS were studied. The results show that the use of Er3+:Y3Al5O12 can improve the utilization ratio of visible light (solar light) for NaTaO3. The optimum ratio of Er3+:Y3Al5O12 and NaTaO3 is 0.45 : 1.00. In addition, a study of extended reusability shows that the prepared photocatalyst can be effectively recycled for three repetitive cycles without an apparent deactivation of the photocatalytic activity. A visible-light photocatalytic degradation mechanism of amaranth with simultaneous hydrogen evolution is also proposed.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 13
·1497-1503
·
IF 3.719
Su Shao,Sun Haofan,Xu Fei,Yuwen Lihui,Fan Chunhai,Wang Lianhui
An electrochemical glucose biosensor was developed by immobilizing glucose oxidase (GOx) on a glass carbon electrode that was modified with molybdenum disulfide (MoS 2 ) nanosheets that were decorated with gold nanoparticles (AuNPs). The electrochemical performance of the modified electrode was investigated by cyclic voltammetry, and it is found that use of the AuNPs-decorated MoS 2 nanocomposite accelerates the electron transfer from electrode to the immobilized enzyme. This enables the direct electrochemistry of GOx without any electron mediator. The synergistic effect the MoS 2 nanosheets and the AuNPs result in excellent electrocatalytic activity. Glucose can be detected in the concentration range from 10 to 300 μM, and down to levels as low as 2.8 μM. The biosensor also displays good reproducibility and long-term stability, suggesting that it represents a promising tool for biological assays.
A MoS 2 -based glucose sensor has been prepared by gold nanoparticles-decorated MoS 2 nanocomposite, which exhibited excellent electrocatalytic activity, reproducibility and long-term stability. It was applied to determine glucose concentration in human serum, suggest the sensor maybe promising for practical application.
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Chang Liu,Huan Zhang,Qinghan Wang,Jie Wu,Peng Chen,Shaoxian Song,Chun Zhan,Lei Wang,Feifei Jia
Thiosulfate technique is the most promising method to recover gold from electronic waste (e-waste) and natural ores due to its non-toxicity and high leaching efficiency. However, the bad affinity between Au(S 2 O 3 ) 2 3− and traditional adsorbents leads to unsatisfied gold recovery performance from leaching solution . In this work, highly efficient recovery of gold from low concentrated Au(S 2 O 3 ) 2 3− solution was achieved through enhanced photocatalysis process on a novel MoS 2 /MXene/Ag adsorbent. During recovery procedure, Au(S 2 O 3 ) 2 3− was in-situ reduced to Au 0 by photogenerated electrons and then anchored on MoS 2 /MXene/Ag. Under Au(S 2 O 3 ) 2 3− concentration <10 ppm, over 99 % gold recovery performance could achieve within 2 h. Experimental tests have proved that MXene made fully use of near infrared (NIR) light energy to exhibit better photothermal effect, and surface plasmon resonance (SPR) effect of Ag can simultaneously facilitate the separation of electron-hole pairs on MoS 2 . By means of external temperature input and rapid charge carrier transmission, plenty of electrons were excited from MoS 2 /MXene/Ag for Au(S 2 O 3 ) 2 3− recovery. This work paved a pathway for efficient Au(S 2 O 3 ) 2 3− recovery, which catered to the demand for green production of gold in the future.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Deshou Wang,Yumeng Liang,Yong Zeng,Chang Liu,Chun Zhan,Peng Chen,Shaoxian Song,Feifei Jia
The recycling of electronic waste, i.e ., waste Printed Circuit Boards (WPCBs), provides substantial environmental and economic advantages. In fact, the concentration of valuable precious and base metals in WPCBs is even higher compared to those found in mined ores. Nevertheless, it is still challenging to selectively extract precious metals with low concentrations from the pregnant leaching solution, due to the co-deposition of base metals, like Cu, which have higher concentrations. In this research, stepwise recovery of precious metals and copper directly from WPCBs thiosulfate leaching solution was facilitated by the Ti cathode coated with MoS 2 (MoS 2 /Ti). The in-situ enrichment of Au(S 2 O 3 ) 2 3- and Ag(S 2 O 3 ) 2 3- at the surface of MoS 2 enables the high efficiency and selectivity of electrodeposition , which has been confirmed through COMSOL Multiphysics simulations and visualization. As a result, the first-step electrodeposition at 0.6 V recovered 92.44 % Au and 98.18 % Ag without any co-deposition of Cu. Subsequently, the second-step recovery employed a constant current of 0.03 A, achieving 100 % recovery of copper within 12 h. Furthermore, this study optimized the reduction potential, NH 3 ·H 2 O concentration, and S 2 O 3 2- concentration for the stepwise electrodeposition process. These findings provide valuable insights for establishing a closed loop circular economy in the electronics industry.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2024
·
IF 5.2
Shilan Fu,Junfeng Liu,Siqi Wu,Lin Zhang,Xu Zhang,FengFu Fu
Enzyme mimics with dual enzyme-like activities can catalyse cascade reactions with high efficiency and thus play a significant role in biochemistry since multistep cascade reactions often occur in biocatalysis. Especially, a nanozyme that simultaneously possesses peroxidase-like and pyranose oxidase (POx)-like activities is highly desired since it can be used for bio-synthetizing rare sugars and fabricating bio-enzyme-free colorimetric methods for the detection of various pyranoses. We herein prepared a novel dual-active nanozyme, which simultaneously possesses enhanced and stable peroxidase-like and POx-like activities, by loading gold nanoparticles (AuNPs) on MoS2 nanosheets (AuNPs@MoS2). The prepared AuNPs@MoS2 nanozyme can catalyse various tandem reactions of pyranose oxidation and H2O2-mediated oxidation of TMB with high efficiency and, therefore, can be used to fabricate bio-enzyme-free colorimetric methods for the detection of various monosaccharides with a pyranyl ring, including glucose, xylose and galactose. Based on the AuNPs@MoS2 nanozyme, we successfully developed bio-enzyme-free colorimetric methods for the detection of glucose, xylose and galactose with a visual detection limit of 0.2–0.3 mM and a spectrometry detection limit of 5.0–11 μM. The developed colorimetric glucose, xylose and galactose detection methods were successfully used to detect glucose in serum, xylose in bread and galactose in milk, respectively, with a recovery of 89–108% and a relative standard deviation (RSD, n = 5) of <5%. With enhanced peroxidase-like and POx-like activities and good stability, the developed AuNPs@MoS2 provided a promising dual-active nanozyme for the bio-enzyme-free catalysis of various cascade reactions for the oxidation of various monosaccharides with a pyranyl ring and for further fabricating bio-enzyme-free, cost-effective and simple colorimetric sensors for the visual detection of various monosaccharides with a pyranyl ring, including glucose, xylose and galactose.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 24
·14646-14658
·
IF 10.7
Aihua Yan,Tongyang Zhang,Fei Huang,Shijian Lu,Quande Wang,Huaqi Yuan,Ye Gao,Wenxue Zhao,Jixu Zhang,Zigao Su
Exploring visible-light-driven photocatalytic materials for water splitting is of great significance for achieving green and renewable hydrogen fuel. In this work, MoS2/Sv-ZnIn2S4/Cu(OH)2 (MS/Sv-ZIS/COH) dual-junction composites for hydrogen generation were constructed by an in situ structure-tailored technique. Based on the in situ decomposition of Cu3Mo2O9 (CMO), the instantaneous formation of the sulfur vacancy (Sv), Ohmic-type MS/Sv-ZIS heterojunction and Schottky-type Sv-ZIS/COH heterojunction not only markedly boosted the carrier separation and quickly expedited the charge transfer, but also efficiently inhibited charge recombination and significantly accelerated the hydrogen reduction dynamics. As a result, such composites exhibited an optimum hydrogen production rate of 11.5 mmol h−1 g−1, which was approximately 4.6 times higher than that of pristine ZIS. This work provides an in situ design method to construct new photocatalytic materials for accelerating the redox dynamics and enhancing the water splitting performance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Li Wang,Meng Zhang,Yufei Shu,Qi Han,Li Long,Beizhao Chen,Mengxia Wang,Li Li,Siyu Cao,Zhe Yang,Bei Liu,Zhongying Wang,Chuyang Y. Tang
Thin film nanocomposite (TFNi) membranes interlayered with 2D nanomaterials are promising for organic solvent nanofiltration (OSN) applications. However, swelling and drying problems can arise due to the instability of the 2D nanomaterial interlayer in different solvents and humidity conditions. To address this issue, covalently modified molybdenum disulfide (MoS 2 ) nanosheets (MoS 2 –COOH and MoS 2 –CONH 2 ) were used as interlayers in the fabrication of TFNi membranes. The covalent groups acted as spacers to stabilize the interlayer spacing of the MoS 2 interlayer and regulate its structural stability in diverse solvents and drying conditions. The TFNi membranes interlayered with MoS 2 –COOH and MoS 2 –CONH 2 nanosheets demonstrated excellent structural stability and maintained their high permeance even after exposure to various solvents and drying conditions. The TFNi-MoS 2 -CONH 2 membrane exhibited the highest permeance of 8.60 ± 0.23 L m −2 h −1 bar −1 for MeOH, with a high rejection of 87.1 ± 1.3 % for Evans Blue (EB). Furthermore, the TFNi membranes exhibited sustained separation performance throughout the 72 h test, demonstrating their structural stability. This study highlights the potential of TFNi membranes interlayered with covalently modified MoS 2 nanosheets for OSN applications, providing high permeance and structural stability in diverse solvents and drying conditions.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）