JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.479
Zhuang Xu,Wenjing Lou,Gaiqing Zhao,Qin Zhao,Nan Xu,Junying Hao,Xiaobo Wang
A novel biomimetic surface modification method utilizing mussel-inspired chemistry was used to prepare tungsten disulfide (WS2) nanocomposites, which enhanced the dispersion stability and tribological performance of WS2 in polyalkylene glycol (PAG). Herein, WS2-polydopamine-methoxypolyethylene glycol amine (WS2-PDA-MPGA) was first synthesized via mussel-inspired chemistry and used as a lubricant additive in PAG. After modification, the dispersion stability of WS2 nanosheets in PAG was obviously improved. Moreover, the tribological performance of WS2-PDA-MPGA in PAG at high temperature was evaluated by the oscillating reciprocating tribometer. Compared to pure PAG, the lubricant composition containing WS2-PDA-MPGA exhibited excellent performance in friction reduction and anti-wear properties at high temperature. The optimal tribological performance could be obtained when the percentage of additives was 0.9 wt%. The tribological results indicate that WS2-PDA-MPGA, with its good dispersion stability, has better friction reduction and anti-wear properties than does WS2 in PAG base oil. The chemical composition analysis of the wear surface indicated that a stable protective film had been formed by physical adsorption and tribo-chemical reactions. Therefore, the surface modification strategy is an effective way to improve the dispersion stability of WS2 in PAG, which can be expanded application of WS2 in the tribological field.
研究领域:
材料科学
·
摩擦学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2023
·Vol. 15
·期 15
·e202300440
·
IF 4.5
Xiaoyue Zhang,Yong Yang,Lijun Xiong,Tianyu Wang,Mengwei Xue,Jianhua Ge,Zheng Tang,Panjie Li,Nan Yin,Jinyou Shen
Graphical Under light excitation , WOS broadens the photo-response range through Z-scheme heterojunction. Its photothermal effect can convert light into heat and accelerate the reaction. This efficient photothermal technology facilitates CO 2 reduction. Photothermal CO 2 reduction using H 2 O combined with photocatalysis-driven H 2 O splitting combined with thermal catalysis-supported CO 2 reduction has attracted rapid interest in artificial synthesis of solar fuel. With respect to extremely efficient photothermal catalysis, the photothermal impact of TMDCs (Transition Metal Dichalcogenides) facilitates CO 2 reduction by activating lattice oxygen in oxide to enhance H 2 O oxidation. However, the fixed band gap of single photocatalyst is limited. The purpose of this work is to expand the band gap and improve the redox capacity. Hollow boxwood ball-like WO 3 /WS 2 Z-scheme heterojunctions were prepared and used for photothermal catalytic CO 2 reduction. DFT calculations and UV-Vis spectra show LSPR effect in WOS heterojunctions, and the optical response extends to near infrared region. By comparison, the photothermal catalytic reduction of WO 3 /WS 2 (9.717 μmol) by CO 2 at 513 K is higher than that at 298 K (1.198 μmol) by a factor of 8. The formation of Z-scheme heterojunction promotes rapid carrier transfer and lowers the reaction energy barrier. As well as the hollow structure improves light utilization and increases the interfacial area and number of active sites. In addition, the WO 3 /WS 2 heterostructure utilizes its unique LSPR effect to generate heat through the photothermal effect, which can also promote molecular activation. This work reveals the important role of the LSPR effect in photothermal catalysis and demonstrates a TMDCs-based photothermal-driven catalysts, which presents a promising approach for designing of photothermal catalytic CO 2 reduction.
研究领域:
催化
·
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 8
·2457
·
IF 3.5
Deying Wang,Yan Chen,Qi Zhang,Junfei Chen,Changhao Li,Yunjing Luo,Yong Jin,Xiaohua Qi
HighlightsWhat are the main findings?Developed a novel WS2-Au nanocomposite coupled with 5,5′-dithiobis-(2-nitrobenzoic acid) (DTNB) and antibodies as sensitive surface-enhanced Raman scattering (SERS) nanotags forE. coliO157:H7 detection.Demonstrated a broad linear detection range (8 × 102–8 × 107CFU/mL), a low detection limit (175 CFU/mL), high specificity and good accuracy in real food samples (milk, pork).What are the implications of the main findings?A rapid assay for qualitative and quantitative detection ofE. coliO157:H7, overcoming limitations of traditional ICA methods.A cost-effective, user-friendly surface-enhanced Raman scattering (SERS)-based immunochromatographic assay (SERS-ICA) platform with great potential for point-of-care testing and detection of other foodborne pathogens.E. coliO157:H7 contamination in food and the environment poses a serious threat to human health. Rapid and sensitive identification of foodborne pathogens remains challenging. Here, we prepared tungsten disulfide (WS2)–Au nanocomposites coupled with the Raman signal molecule 5,5′-dithio-bis-(2-nitrobenzoic acid) (DTNB) and antibodies to replace the conventional colloidal gold nanoparticles and applied SERS-active nanotags in the SERS-ICA method for highly sensitive detection ofE. coliO157:H7. The large surface area and numerous effective SERS hotspots of WS2-Au nanotags provide superior SERS signals. Under optimized conditions, this ICA achieves the quantitative detection ofE. coliO157:H7 in a broad linear range of 8 × 102–8 × 107CFU/mL and at a low detection limit of 175 CFU/mL. In addition, the test strip indicates high specificity forE. coliO157:H7 identification, favorable reproducibility, and shows good accuracy in the detection of actual food samples, such as milk and pork. The proposed assay can be used for rapid qualitative and quantitative detection ofE. coliO157:H7 and has great potential for field application.
研究领域:
食品科学
·
分析化学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Tingting Li,Ruisong Guo,Yani Luo,Fuyun Li,Zhichao Liu,Leichao Meng,Zhiwei Yang,Honglin Luo,Yizao Wan
By skillfully designing the double-sided protective structure, WS 2 nanosheets in situ grow on reduced graphene oxide hollow spheres (Hs-rGO). Then nitrogen doped graphene (NG) is coated on the outer layer to obtained NG@WS 2 @Hs-rGO. Double-sided protective structure of NG@WS 2 @Hs-rGO is successfully fabricated via a facile synthesis strategy. When evaluated as an anode material for Lithium-ion batteries (LIBs), NG@WS 2 @Hs-rGO exhibits a high specific capacity of 1309.4 mAh g −1 at 100 mA g −1 and excellent rate capability (166.1 mAh g −1 at a high current density of 4000 mA g −1 ). More strikingly, at a high current density of 1000 mA g −1 , the NG@WS 2 @Hs-rGO electrode delivers a discharge capacity of 300.9 mAh g −1 after 320 cycles. The capacity retention of the electrode material reaches as high as 106% of the discharge capacity after the 10th cycle. Internally, the elastic Hs-rGO provides space for the bulk expansion of WS 2 . Externally, the outer layer of WS 2 coated with NG not only improves the conductivity, but also provides more active sites for Li ion storage. The double-sided protective structure makes NG@WS 2 @Hs-rGO a potential anode material for light and high-performance LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yongjiao Sun,Jun Li,Yuchen Hou,Bingliang Wang,Wendong Zhang,Koichi Suematsu,Lin Chen,Jie Hu
Electrically conductive metal-organic frameworks (EC-MOFs) exhibit significant potential application as sensing materials for chemical resistance gas sensors. Herein, we developed a flexible gas sensor based on Ni 3 (HITP) 2 nanosheets co-functionalized with noble metal nanoparticles (NPs) and WS 2 quantum dots (QDs) for NO 2 detection at room temperature. The gas sensing performance was regulated by optimizing the metal species and loading ratios of WS 2 QDs. The measured results revealed that Au NPs and 2 mol% WS 2 achieved the most effective enhancement for NO 2 sensing performance. Therefore, Au NPs was selected to optimize WS 2 -2/Ni 3 (HITP) 2 sensor for further improving the sensing properties. A unique hierarchical structure based on gas sensor (Au 3 @WS 2 -2/Ni 3 (HITP) 2 sensor) enables high response (14.73 % to 5 ppm NO 2 ), rapid response/recovery time (97 s/110 s), good selectivity, anti-humidity, repeatability, long-term stability as well as flexibility at room temperature. Furthermore, density functional theory (DFT) and band theory were employed to comprehend adsorption energies and the electronic structures at atomic scale, elucidating the intrinsic correlation between NO 2 adsorption behavior and Ni 3 (HITP) 2 surface and the sensitization mechanism of heterostructures. These findings provide novel insights for designing high-performance NO 2 gas sensors worked at room temperature and guidance for EC-MOFs sensing mechanism.
研究领域:
材料科学
·
化学传感
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 14
·10338-10350
·
IF 2.993
Xiao Yong-Hao,Yu Yu-Xiang,Zhang Wei-De
Novel visible-light-driven WO 3 nanorod arrays with oriented (200) facet were successfully synthesized via a facile solvothermal process using mixed ethanol and water as solvents. Subsequently, WS 2 quantum dots (QDs) derived from bulk WS 2 powder via ultrasonication were interspersed on WO 3 nanorod arrays. The presence of suitable volume ratio of ethanol is a key factor to achieve greater exposure of the WO 3 (200) facet. The morphologies, microstructures and optical properties of the prepared samples were systematically explored. The results illustrated that the preferential exposure on the (200) facet of WO 3 nanorods as well as the efficient relative electrochemically active surface areas provided by WS 2 QDs could facilitate the charge transfer between WS 2 QDs and the (200) facet of WO 3 nanorods. This study provides a promising approach to design high performance photoanodes for photoelectrochemical water splitting.
研究领域:
材料科学
·
光化学
·
纳米技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Yingfeng Qin,Yefei Ma,Xue Jin,Liangliang Zhang,Gaojie Ye,Shulin Zhao
As an important antitumor drug, bleomycin (BLM) is widely used in the treatment of a variety of cancers. In addition, nucleases play a crucial role in DNA replication, recombination and repair which are associated with cancer development. Thus, the development of BLM and nuclease detection methods is of great significance in cancer therapy and related biological mechanism research. Here, a WS 2 nanosheet-based turn-on fluorescent sensing platform for simple, fast and sensitive detection of BLM and nuclease was reported. WS 2 nanosheet exhibits different affinity toward ssDNA with different length and excellent fluorescence quenching ability. A fluorescein (FAM)-labeled long ssDNA could be adsorbed on the surface of WS 2 nanosheet and the fluorescence was therefore quenched. In the presence of BLM·Fe(II) or S1 nuclease (a ssDNA-specific nuclease which was used as a model enzyme), an irreversible scission of long ssDNA was underwent through the BLM-induced oxidation cleavage or S1 nuclease-induced enzymatic hydrolysis. Short FAM-linked oligonucleotide fragments which could not be adsorbed on the nanosheet surface were then produced, resulting in a weak fluorescence quenching after mixing WS 2 nanosheets. Thus, the fluorescence signal was restored. The proposed sensor displays a wide linear range and a high sensitivity with a detection limit of 0.3 nM for BLM and 0.01 U mL −1 for S1 nuclease. It also exhibits a good performance in complex biological samples. This method not only provides a strategy for BLM or S1 nuclease assay but also offers a potential application in biomedical and clinical study.
研究领域:
生物化学
·
分子生物学
·
分析化学
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
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.
研究领域:
植物学
·
遗传学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 15
·e202200474
·
IF 4.782
Fanxuan Xie,Man Xiong,Jiapeng Liu,Jingwen Qian,Tao Mei,Jinghua Li,Jianyin Wang,Li Yu,Jan P. Hofmann,Xianbao Wang
Graphical WS 2 @C nanoflowers modified polypropylene separator (WS 2 @C-PP) can effectively adsorb lithium polysulfides and catalyze their conversion on the adsorptive/electrocatalytic sites of WS 2 . The unique design of the carbon coating on the WS 2 maximizes the synergism of polarity and conductivity, benefiting the recycling of the active materials, while forming the uniform and stable modified layer. Featuring high theoretical capacity, environmental friendliness and low cost, lithium-sulfur (Li-S) batteries become promising alternatives to satisfy the growing demand for energy storage. To boost their energy density for practical application, modified separators are needed to suppress shuttle effects resulting from the solubility of lithium polysulfides (LiPSs). Herein, we modified traditional polypropylene (PP) separators with functional WS 2 @C nanoflower composites (WS 2 @C-PP). They can effectively adsorb LiPSs and catalyze their conversion on the edge sites of the WS 2 . Also, the unique construction of a carbon layer coating on the WS 2 nanoflowers combines active sites and conducting properties. The material benefits the reversibility of redox reactions and reutilization of active materials. With the WS 2 @C-PP separator, the cell displays improved cycling stability and rate performance. When cycling at 0.1 C, the cell discharges a capacity of up to 1475 mAh g −1 , and it contributes 943 mAh g −1 originally at 1 C, with a decay rate of only 0.07 % after 500 cycles. Our work highlights the potential of functional separators to advance the properties of Li-S batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiaoya Bi,Libo Li,Lijun Luo,Xiaohong Liu,Jiamin Li,Tianyan You
Semiconductor quantum dots (QDs) and tungsten disulfide nanosheets (WS 2 NTs) have been widely studied in photocatalysis and photoelectrochemistry as representative electron donor–acceptor pairs but rarely in fluorescence sensing. In this study, we investigated the effect of WS 2 NTs on the fluorescence signal of cadmium telluride (CdTe) QDs by grafting an aptamer as a bridge between them. The corresponding quenching mechanism was systematically explored, and results described the photoinduced electron transfer (PET) from excited CdTe QDs to WS 2 NTs. Based on these results, a novel ratiometric fluorescence aptasensor was developed for zearalenone (ZEN) determination by innovatively introducing exonuclease I to digest the aptamer of ZEN and control the PET between CdTe QDs and WS 2 NTs. The designed aptasensor exhibited an acceptable linear range and detection limit (0.1 pg mL −1 ), and superior accuracy and selectivity. This ratiometric fluorescence aptasensor was also used to monitor ZEN in rice and corn flour.
研究领域:
分析化学
·
食品安全检测
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Kai Wang,Nini Zhao,Haiyan Xie,Jingzhi Wang,Wenli Xu,Zhiliang Jin
Improving the separation efficiency of semiconductor photogenerated carriers is an important way to enhance the photocatalytic activity of water splitting. To establish an efficient photocatalytic hydrogen production system, a practical method combining metal-like cocatalysts with semiconductors was designed. This article prepared Ni-CdS by modifying Prussian blue analogues and synthesized Ni-CdS/1T-WS 2 composite materials by low-temperature mixing with metal-like catalyst 1T-WS 2 . At the optimal load concentration, it can reach 62.65 mmol g -1 . Firstly, the close contact interface formed between the two enables rapid transfer of photo generated electrons . Secondly, metal-like cocatalysts have a strong attraction to the charges generated by light, forcing electron hole separation and exacerbating this effect under illumination. This has been strongly demonstrated through a series of characterizations and in-situ radiation X-ray photoelectron spectroscopy. In summary, this study provides a reliable and clear understanding for the modification of Prussian blue analogues and the regulation of photo induced charge transfer by metal-like cocatalysts.
研究领域:
材料科学
·
物理化学
·
能源催化
·
半导体光催化
·
纳米材料
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Yaohui He,Zhaozhu Zhang,Yanling Wang,Meng Liu,Chaoying Liao,Junya Yuan,Peilong Li,Mingming Yang,Weimin Liu
Developing high-performance fabric composites with comprehensive properties is of paramount importance to broaden their application areas. In this work, a novel technique was studied to enhance interfacial adhesion via the adsorption of the complex amphiphilic biopolymer protein onto the surface of PPS/PTFE fabrics. Additionally, WS 2 @Ti 3 C 2 nanohybrids with heterostructures were synthesized, and the distinctive hierarchical microstructure facilitated the multiple reinforcement of the fabric composites. The results suggest that the decoration of BSA offers reaction sites with the phenolic resin and enhances the interfacial performance. Compared to the pure hybrid fabric composites, the tensile and bonding strength of the reinforced hybrid fabric composites are increased by 35.91% and 68.51%. Moreover, the wear rate of the reinforced hybrid fabric composites is decreased by 59.3%.
研究领域:
材料科学
·
生物学
·
表面工程
✓ 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）