ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Liang Chen,Xiaojun Zhou,Wei Nie,Wei Feng,Qianqian Zhang,Weizhong Wang,Yanzhong Zhang,Zhigang Chen,Peng Huang,Chuanglong He
The construction of safe and stable theranostics is beneficial to realize simultaneous cancer diagnosis and treatment. In this study, bovine serum albumin–gadolinium (BSA–Gd) complexes and MoS2 nanoflakes (MoS2–Gd–BSA) were successfully married as cancer theranostics for dual-modality magnetic resonance (MR)/photoacoustic (PA) imaging and photothermal therapy (PTT). BSA–Gd complexes were prepared by the biomineralization method and then conjugated with MoS2 nanoflakes via an amide bond. The as-prepared MoS2–Gd–BSA possessed a good photostability and photothermal effect. The cytotoxicity assessment and hemolysis assay suggested the excellent biocompatibility of MoS2–Gd–BSA. Meanwhile, MoS2–Gd–BSA could not only achieve in vivo MR/PA dual-modality imaging of xenograft tumors, but also effectively kill cancer cells in vitro and ablate the xenograft tumors in vivo upon 808 nm laser illumination. The biodistribution and histological evaluations indicated the negligible toxicity of MoS2–Gd–BSA both in vitro and in vivo. Thus, our results substantiated the potential of MoS2–Gd–BSA for cancer theranostics.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Dawei Gao,Haixiang Wang,Qiaoli Lu,Chao Ye,Jingsheng Cai,Lili Wang
Antibiotics, widely used to treat bacterial infections and as agricultural feed additives, pose significant environmental threats due to their persistence, particularly sulfamethoxazole (SMX), which is frequently detected in various ecosystems. Traditional wastewater treatment methods are often ineffective in their removal. This study presents a cost-effective three-dimensional CCF@MoS 2 @GA-Fe (CMGF) catalyst, with cotton fabric as a support to enhance peroxymonosulfate (PMS) activation in advanced oxidation processes (AOPs). Findings indicates that Mo(IV) active sites in CMGF significantly enhanced electron transfer and redox cycling of Fe(II)/Fe(III), ensuring sustained PMS activation and achieving approximately 3.8 times higher degradation efficiency compared to non-catalytic processes. After five cycles, CMGF retains its high catalytic activity. Key active species during PMS activation include singlet oxygen ( 1 O 2 ), hydroxyl radicals (•OH), and sulfate radicals (SO 4 − •). This research elucidates the catalytic mechanisms and degradation pathways of the CMGF/PMS system, highlighting its potential for removing organic pollutants from water.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Lin Jin,Lin Zhang,Hao Liang,Yuhui Ao,Song Wang,De Sun
Solar-driven interfacial water evaporation is often regarded as a promising method for producing fresh water from seawater. However, developing an evaporator with an ideal evaporation rate and efficient seawater desalination capabilities remains a significant challenge, especially when considering the mechanical performance requirements in large-scale practical use. Based on this, this work proposed a Janus-structured 3D carbon fiber (CF)-reinforced solar-driven evaporator fabricated through a vacuum-assisted infusion process (VAIP). A heterogeneous structure of 1 T MoS 2 -MXene, formed through ion embedding, was adorned on the surface to serve as an efficient photothermal conversion material. Due to the synergistic advantages, the Janus 1 T MoS 2 -MXene/ CSA/CF (JMMC) evaporator achieved excellent solar absorption efficiency of 94 % in the range of 200–2500 nm. The evaporator exhibited an evaporation enthalpy as low as 1556.4 kJ·kg −1 , which facilitated the escape of water molecules at the interface. The JMMC evaporator delivered a high evaporation rate of 2.29 kg m -2 h −1 and an efficiency of 93.8 % under the irradiation of 1 sun (1.0 kW/m −2 (−|-)). The influence of the heterogeneous structure of 1 T MoS₂-MXene on the water evaporation rate was thoroughly assessed through molecular dynamics simulations. Besides, the mechanical performance of this evaporator was highly satisfactory, rendering it suitable for application in demanding and complex usage environments. Furthermore, its remarkable conductivity facilitated an excellent Joule heating effect even at low voltages, enabling water evaporation under challenging circumstances such as overcast skies or indoor settings. The versatility of this scalable evaporator holds great promise for addressing the issue of freshwater scarcity.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Aobo Wan,Longkai Zhu,Yizhen Zhang,Shijing Huang,Yun He,Shunxi Zhang,Fengjiao Quan,Jianfen Li
The poor contact between the photocatalyst and the FTO substrate are the main factors lead to the low performance of photocatalytic fuel cell (PFC). Herein, a FTO pre-treated with a TiO 2 electron transport layer was used as a substrate for the synthesis of the MoS 2 /BiVO 4 /pre-FTO photoanode. The proposed MBV-4/pre-FTO photoanode with its enhances the visible light absorption and effectively delays the recombination of the photoexcited charge. The MBV-4/pre-FTO composite photoanode (6.02 mA/cm 2 ) exhibited a photocurrent density that was 2.2 times higher than that of the BiVO 4 photoanode (2.78 mA/cm 2 ). This is attributed to the short charge migration length of the thin MoS 2 layer, the fast photoexcited electron transport effect of the TiO 2 seed layer, and the heterojunction structure of the proposed photoanode. The DFT calculation result indicated that the TiO 2 electron transport layer showed an outstanding photoelectron attractive and transporting effect. The MoS 2 /Ni foam was employed as the photocathode to establish a mismatched Fermi level for driving PFC. The short-circuit current, open-circuit voltage, and maximum power density of the PFC were 0.578 mA/cm 2 , 0.632 V, and 0.125 mW/cm 2 , respectively. The main photodegradation active species are the superoxide anion (∙O 2– ) and the photoexcited hole (h + ), and the degradation efficiency is 61.97 %.
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ACS Nano
·
2024
·
IF 15.8
Feier Niu,Zhongchao Bai,Junming Chen,Qinfen Gu,Xuchun Wang,Jumeng Wei,Yueyuan Mao,Shi Xue Dou,Nana Wang
Rechargeable aqueous zinc ion batteries (AZIBs) have gained considerable attention owing to their low cost and high safety, but dendrite growth, low plating/stripping efficiency, surface passivation, and self-erosion of the Zn metal anode are hindering their application. Herein, a one-step in situ molecular engineering strategy for the simultaneous construction of hierarchical MoS2 double-layer nanotubes (MoS2-DLTs) with expanded layer-spacing, oxygen doping, structural defects, and an abundant 1T-phase is proposed, which are designed as an intercalation-type anode for “rocking-chair” AZIBs, avoiding the Zn anode issues and therefore displaying a long cycling life. Benefiting from the structural optimization and molecular engineering, the Zn2+ diffusion efficiency and interface reaction kinetics of MoS2-DLTs are enhanced. When coupled with a homemade ZnMn2O4 cathode, the assembled MoS2-DLTs//ZnMn2O4 full battery exhibited impressive cycling stability with a capacity retention of 86.6% over 10 000 cycles under 1 A g–1anode, outperforming most of the reported “rocking-chair” AZIBs. The Zn2+/H+ cointercalation mechanism of MoS2-DLTs is investigated by synchrotron in situ powder X-ray diffraction and multiple ex situ characterizations. This research demonstrates the feasibility of MoS2 for Zn-storage anodes that can be used to construct reliable aqueous full batteries.
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Surfaces and Interfaces
·
2024
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IF 5.7
Gengzhe Shen,Lin Xu,Jing Kong,Chi Tat Kwok,Jingle Wang,Liuyan Zhang,Xiaohua Jie,Zhipeng Sun,De Ning,Zhengjian Chen
In this study, a new Al-LPM composite coating was in-situ deposited on the Al alloy via a facile one-pot hydrothermal method . Morphological and compositional characterizations revealed a tri-layered structure of the Al-LPM coating, namely, zinc aluminum-layered double hydroxide (ZnAl-LDH)/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS)/MoS 2 . ZnAL-LDH was deposited closest to the surface of Al alloy , and the metallic ion-cross-linking of PEDOT:PSS makes the 3D coating more robust. The unique structure endows the coating with superior protective properties against both corrosion and wear. For anti-corrosion, the Al-LPM coating showed very high self-corrosion potential (-0.092 V) and small self-corrosion current density (46.0 μA cm −2 ) (vs. Al substrate with -1.157 V and 354.8 μA cm −2 , respectively), long-lasting high corrosion resistance (>57,000 Ω cm 2 ) during the immersion test, and the almost intact surface morphology and composition after 360 h corrosion. For anti-wear, the friction coefficient of the Al-LPM coating was determined to be < 0.2, which was much smaller than for the Al substrate (> 0.4). Also, there were no serious wear marks and grooves left after the dry-friction test.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Qunying Sun,Qianxiang Xiao,Qixu Chen,Wen He,Feng He,Hongqing Wang
Efficient and stable photocatalytic materials are urgently needed for the photo-reduction of uranium in wastewater treatment without the addition of external sacrificial agents under air conditions. Herein, we designed and synthesized 1 T@2H MoS 2 QDs (MSQ) modified oxygen-rich defective ZnO photocatalysts 1 T@2H MoS 2 QDs/OV-ZnO (MSQVZO) and systematically investigated its photocatalytic U(VI) activity in various matrices, which exhibited 97 % removal efficiency of uranium after 40 min of visible light irradiation under aerobic conditions, and the order of photocatalytic activity was MSQVZO > OV-ZnO > ZnO. XRD, ESR, XPS, and UV–vis were used for the characterization of the materials. In addition, it was argued using DFT analysis that the introduction of oxygen defects drove the OV-ZnO to interact with the intermediates of the oxygen evolution reaction (OER) reaction more readily than the ZnO, thus improving the activity of the OV-ZnO-based catalysts. More importantly, a new mechanism for photo-reduction of U(VI) was established. It provides an effective strategy for the photo-reduction of U(VI) without a sacrificial agent.
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Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Meng Fu,Chang Luo,Qi Yuan,Zequn Ma,Quansheng Long,Baihui Liu,Dang Wu,Jingshui Xu,Xiangming Li
The development of bacterial resistance to antibiotics and its global spread highlights the urgent need for new alternative antimicrobial agents. Here, we have developed a biosafe antibacterial material based on reduced graphene oxide/polyelectrolytes nanolayers and gold nanoparticles functionalized molybdenum disulfide (rGP 1.5 /MoS 2 -AuNPs) via in situ synthesis and electrostatic assembly. The rGP 1.5 /MoS 2 -AuNPs has high visible and near-infrared absorption, which can efficiently provide remarkable photothermal conversion efficiency and generate reactive oxygen species (·O 2 - , ·OH, 1 O 2 ) via photocatalytic oxygen reduction and water oxidation. The rGP 1.5 /MoS 2 -AuNPs combines the photocatalysis with photothermal effect, exhibiting a biosafe and effective killing for Gram-negative and Gram-positive bacterial. The rGP 1.5 /MoS 2 -AuNPs simultaneously optimizes three key parts for antibacterial: i) polyelectrolytes component promotes bacterial adhesion, ii) reduced graphene oxide and AuNPs components provide photothermal conversion capacity and increase light absorption, iii) MoS 2 component generates photogenerated electron-hole pairs, and the electrons are rapidly conducted from the AuNPs to the reactants, which promotes the rapid separation of the electron-hole pairs, resulting in the generation of reactive oxygen species. This work provides a simple but powerful way to prepare photocatalytic and photothermal material for antibacterial applications.
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Nanomaterials
·
2020
·Vol. 10
·期 9
·1725
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IF 4.324
Zhi Zeng,Dongbo Wang,Jinzhong Wang,Shujie Jiao,Yuewu Huang,Sixiang Zhao,Bingke Zhang,Mengyu Ma,Shiyong Gao,Xingguo Feng,Liancheng Zhao
In this work, MoS2microspheres/PtCo-alloy nanoparticles (MoS2/PtCo-alloy NPs) were composited via a novel and facile process which MoS2is functionalized by poly (N-vinyl-2-pyrrolidone) (PVP) and self-assembled with PtCo-alloy NPs. This new composite shows excellent electrocatalytic activity and great potential for dye-sensitized solar cells (DSSCs) as a counter electrode (CE) material. Benefiting from heterostructure and synergistic effects, the MoS2/PtCo-alloy NPs exhibit high electrocatalytic activity, low charge-transfer resistance and stability in the cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) test. Meanwhile, a high power-conversion efficiency (PCE) of 8.46% is achieved in DSSCs with MoS2/PtCo-alloy NP CEs, which are comparable to traditional Pt CEs (8.45%). This novel composite provides a new high-performance, stable and cheap choice for CEs in DSSCs.Keywords:MoS2/PtCo-alloy nanoparticles;dye-sensitized solar cells;counter electrodes;efficiency;electrocatalytic activity
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MATERIALS CHEMISTRY AND PHYSICS
·
2024
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IF 4.3
Huijie Qin,Tongwei Zhang,Lihong Bao,Bo Dang,Jianxi Li
The high flammability of ethylene vinyl acetate copolymers (EVA) limits its important applications in fire safety, and the addition of highly effective flame retardants can improve this deficiency. Melamine cyanurate (MCA) has limited carbon-forming ability and therefore is often combined with other flame retardants to achieve synergistic flame retardant effects and thus improve the flame retardancy of EVA. Therefore, in this study, MoS 2 @Fe 3 O 4 hybrid materials were synthesized by in-situ growth of molybdenum disulfide (MoS 2 ) and ferric oxide (Fe 3 O 4 ) and their structures were characterized using various techniques. The hybrids were blended with melamine cyanurate (MCA) into ethylene vinyl acetate copolymer (EVA) by melt blending method to reduce the fire hazard. The EVA composites with 1.0 wt% MoS 2 @Fe 3 O 4 blends significantly improved the coke residue and limiting oxygen index values to 22.5 % and 23.2 %, while their peak heat release rate, total heat release, and total smoke release were reduced by 62.5 %, 11.7 %, and 35.3 %, respectively, as compared to pure EVA. The results suggest that the use of MoS 2 @Fe 3 O 4 hybrids in combination with MCA is a promising strategy for the development of advanced flame-retardant materials.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Velusamy Periyasamy,Shanhu Liu,M. Sathiya,Awais Ahmad,Elangovan Elamurugu,Asma A Alothman,Mohammad Sheikh Saleh Mushab,Fuchun Zhang,Xinghui Liu
Photoelectrochemical (PEC) systems are inefficient, probably due to charge carrier mobility, recombination rate, and solar light absorption. Fabricating semiconductor-metal sulfide nanocomposites and nanostructured materials can improve the absorption of solar radiation, electron–hole separation, transport, and hydrogen (H2) and oxygen generation to resolve the world’s energy dilemma. The vanadium-doped (V) layered graphitic carbon nitride (g-CN)/MoS2 (MS) nanocomposite was synthesized employing two-step solvent evaporation and thermal condensation. This multilayer V-doped g-CN/MS nanocomposite broke down methyl red dye in 60 min under sunlight. Due to visible light absorption, the V-doped g-CN-MS nanostructure degrades the dye by 97.84%. We found that at 3.0 wt % V-doped g-CN/MS coated on TiO2 nanorods. The catalyst nanocomposites displayed a high photocurrent density of 23.72 mA cm–2 and a H2 production rate of 4477 mol h–1 cm–2. Additionally, the microstructure, optical absorption behavior, and electrical conductivity were all shown to contribute to these impressive PEC characteristics. The V-modified g-CN/MS nanocomposite structures are effective and regulated PEC catalysts, and this study suggests ways to improve PEC water splitting and degradation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Jiejie Huang,Chunying Min,Zhaolong Sun,Hang Yu,Hongyu Liang
Graphitic carbon nitride (g-C 3 N 4 ) nanomaterials have drawn much interest in the lubrication and friction fields owing to their excellent self-lubrication and mechanical performances. However, the easy agglomeration and poor dispersion stability of single g-C 3 N 4 (CN) have always been a headache. In the work, multi-dimensional ternary carbon nanotube, graphite carbon nitride, and molybdenum disulfide (CNT, CN, and MoS 2 ) hybrids were fabricated by hydrothermal method. The microstructure and its reinforcement impact on the tribological properties of the corresponding paraffin oil were systematically studied. The results showed that the zero-dimensional spherical MoS 2 , one-dimensional tubular CNT, and two-dimensional lamellar CN are uniformly compounded. The tribological test results display that average friction coefficient and wear rate of the 0.2 wt% CNT/CN/MoS 2 are decreased by 39.23% and 91.97% lower than those of pure paraffin oil, CNT and CN/MoS 2 with the same concentration, respectively. The significantly improved tribological properties of lubricating oil is ascribed to even dispersion of CNT, CN, MoS 2 in CNT/CN/MoS 2 hybrids, self-lubricating effect of MoS 2 and CN, and load-bearing ability of CNT and CN nanosheets, and also the generation of lubricating film between friction pairs during the wear process.
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