ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Miaomiao Xiang,Huihui Liu,Chenxi Huang,Yue Li,Hualing Zeng,Xiang Shao
Molybdenum disulfide (MoS2) has attracted considerable interest due to its superior electronic and optical properties, which have seen promising applications in optoelectronics and catalysis. Chemical vapor deposition (CVD) has been successfully applied in synthesizing MoS2 on various substrates. However, it remains a great challenge to fabricate high-quality MoS2 sheets with well-controlled micro/nano size and homogeneous distribution over the functional substrates such as active metal oxides. Herein, we have developed a two-step synthetic strategy via depositing MoO3 first followed by subsequent vulcanization, to grow single-layer MoS2 on an atomically flat rutile TiO2(110) (r-TiO2(110)) substrate. This method not only very well controls the size as well as the spatial distribution of MoS2 nanosheets over the TiO2 surface but also averts the formation of contaminative species at the heterojunction while maintaining the atomic structure of the substrate surface. The extensive characterizations reveal that the formation of MoS2 derives from the sulfurization of the singly dispersed Mo6+ and Mo5+ species in the surface/subsurface region instead of the aggregated MoO3 patches on top of the TiO2 surface. Such a mechanism may dictate a general way for synthesizing high-quality transition-metal dichalcogenides (TMDs) over a variety of functional substrates.
研究领域:
材料科学
·
化学
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DOI
PubMed
高影响因子
NANO
·
2020
·
IF 1.566
Yingying Lv,Jiayu Lin,Yihong Ma,Siyan Peng,Liusai Yang,Leshu Yu
The use of adsorption capacity of porous and large-surface-area materials is an important approach to treat dye-containing effluents. In this study, the porous carbon nanocages (CNCs) were synthesized from the precursor of phenol in home-made chemical vapor deposition (CVD) setup at 600–1000 ° C, and were convincingly characterized. The as-prepared CNCs are amorphous, porous and hollow, and have the size of 50–100 nm in width, 100–200 nm in length and several nm in thickness, causing to the large surface area of 800 m 2 /g and pore volume of 1.63 cm 3 /g. The growth of amorphous-like CNCs was related to the thermolysis species of phenol. Interestingly, each CNC has large volume hollow coelom and small opening (a typical ink bottle pore), being in favor of adsorption but in disfavor of desorption, thus it is very fit for acting as the adsorbent of dye. As expected, the products showed excellent adsorbility of rhodamine B when compared with the most used activated carbon having straight and slit pore structures, displaying broad application prospects in removing dye from wastewater.
研究领域:
材料科学
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环境工程
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纳米技术
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吸附科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
B. Li,H.J. Li,X.Y. Yao,X.F. Tian,Y.J. Jia,G.H. Feng
A (ZrC/SiC) 3 alternate coating was deposited on sharp leading edge (SLE) C/C composites by chemical vapor deposition (CVD). The ablation behavior was examined via oxyacetylene torch with heat flux of 2.38 MW/m 2 . The results indicated that the alternate coating exhibited great ablation resistance, providing an effective protection for C/C composites. In initial rapid heating stage, the (ZrC/SiC) 3 alternate coating can relieve thermal stress, avoiding the peeling of coating and keeping an intact coating structure. In subsequent ablation, the SiC layers in central region were consumed rapidly, leaving layered interspaces. Three stacked ZrO 2 layers were reserved with the assistance of the release of thermal stress by interspaces, offering a great anti-scouring effect. In transition and border regions, the alternate SiC layers can delay oxygen erosion of inner coating and C/C substrate by the formation of SiO 2 . It is believed that the results would be helpful for the design and application of anti-ablation coatings on SLE C/C composites.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Haifeng Zhu,Renjie Ding,Jiashun Zhou,Zhiyuan Lang,Huihua Luo,Kehui Xue,Yaping Zhang,Lianqing Yu
This work proposes a novel strategy which the microwave plasma chemical vapor deposition (MPCVD) technology was used as one important preparation process for synthesizing TiO 2 @Ag@graphene ternary junction. The ternary junction exhibits an enhanced photocatalytic hydrogen production rate of 4.44 mmol·g −1 ·h −1 , which is approximately 9.25 times higher than that of pure TiO 2 (0.48 mmol·g −1 ·h −1 ). The remarkable photocatalytic activity can be attributed to the strong synergistic effect between TiO 2 @Ag and graphene. The loaded Ag and graphene can not only act as electronic conductors to effectively promote the separation of charges, but also obviously improve the response of visible light of TiO 2 . The photogenerated electrons are transferred from TiO 2 to graphene via the Ag medium was further verified by DFT calculations. Constructing an Ag-graphene interface can activate carbon atoms, which can quickly capture electron to fill the π* orbital of graphene. TiO 2 @Ag@graphene ternary junction exhibits a lower ΔG H* value of 0.51 eV than that of TiO 2 @Ag (1.49 eV), which indicates that TiO 2 @Ag@graphene ternary junction with optimal absorption energy for the hydrogen intermediate.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2023
·Vol. 13
·期 2
·1112
·
IF 2.7
Zeyulin Zhang,Yanshuang Ba,Dazheng Chen,Pengru Yan,Qingwen Song,Yuming Zhang,Weidong Zhu,Chunfu Zhang,Yue Hao
All-inorganic perovskites, with their low-cost, simple processes and superior heat stability, have become potential candidate materials for photodetectors (PDs). However, they have no representative responsivity in the deep-ultraviolet (UV) wavelength region. As a new-generation semiconductor, gallium oxide (Ga2O3), which has an ultrawide bandgap, is appropriate for solar-blind (200 nm–280 nm) deep-UV detection. In this work, ultrawide-bandgap Ga2O3was introduced into an inorganic perovskite device with a structure of sapphire/β-Ga2O3/Indium Zinc Oxide (IZO)/CsPbBr3. The performance of this perovskite PD was obviously enhanced in the deep UV region. A low-cost, vacuum-free Mist-CVD was used to realize the epitaxial growth of β-Ga2O3film on sapphire. By introducing the Ga2O3layer, the light current of this heterojunction PD was obviously enhanced from 10−8to 10−7, which leds its detectivity (D*) to reach 1.04 × 1012Jones under a 254 nm light illumination with an intensity of 500 μW/cm2at a 5 V bias.
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Yihan Sun,Jinxia Huang,Zhiguang Guo
Superhydrophobicity and underwater superoleophobicity demonstrate mutual advantages in various water-related interfacial applications. However, achieving such two opposite superwetting states on a single one-fabric surface without introducing any continuous external stimulus remains a great challenge. In this work, a chemical vapor deposition (CVD) modification methodology for achieving superhydrophobicity and underwater superoleophobicity on a single one-fabric surface is presented. The CVD methodology plays a crucial role in realizing such unusual superwetting properties that can be achieved through a moderate synergetic effect from hydrophobic and hydrophilic components in surface chemistry. Driven only by gravity, the as-prepared fabric with reasonable resistance to repeatable laundering cycles and long-time corrosive liquid submersion can be further applied in high-efficiency on-demand oil–water separation.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Shuo Wang,Lirong Zhao,Rui Xu,Yanqing Ma,Lei Ma
Copper nanoparticles modified as-grown monolayer and bilayer graphene on copper substrates have been used for non-enzymatic electrochemical glucose sensing. The high quality, continuous, full coverage graphene on copper substrate act as a good electrochemical electrode which obviating the tedious transfer processes. The present sensor shows excellent performance for glucose detection including a wide linear range of 0.02–2.3 mM, a low detection limit (1.39 μM, S/N = 3), high sensitivity (379.31 μA mM −1 cm −2 ), fast response time (＜5 s), good selectivity to the general coexisted interferences, reliable stability, etc. We believe this kind of electrode has a great potential for practical glucose sensing applications and also promise for other biomolecules detection.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 47
·6689-6697
·
IF 1.9
Danyu He,Shehong Li,Pu Zhang,Hongxia Luo
A graphene platform electrode (GPE) was prepared directly by transferring chemical vapor deposited (CVD) graphene films from Cu foils to polyethylene terephthalate substrates with the aid of polymethyl-methacrylate, a distinct advantage over previously developed methods. L-Cysteine (L-Cys) was polymerized on the GPE by using a one-step electrodeposition technique to form a poly-L-Cys/GPE. As a negatively charged polymer, the poly-L-Cys could adsorb positively charged dopamine (DA) and repel negatively charged ascorbic acid (AA) under optimum conditions. As a result, a novel electrochemical sensor for the simultaneous determination of DA and AA was developed. The electrochemical behaviors of DA and AA were investigated by cyclic voltammetry. Differential pulse voltammetry was used for determining DA and AA in their mixture, where the separation between oxidation peak potentials of DA and AA was about 163 mV. The broad linear responses to DA and AA were determined by chronoamperometry, which were 0.2 to 423 μM and 1 to 580 μM with detection limits (S/N = 3) of 0.0531 μM and 0.2031 μM, respectively. In addition, the as-obtained sensor delivered good stability as well as high resistance to interference, and was successfully utilized in determining real samples. Consequently, the poly-L-Cys/GPE could be considered as a new promising DA and AA sensor, strongly indicating that CVD graphene could be used successfully as a material in electrochemistry.
研究领域:
材料科学
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分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Nan Wei,Jingsheng Cai,Ruochen Wang,Menglei Wang,Wei Lv,Haina Ci,Jingyu Sun,Zhongfan Liu
Lithium–sulfur battery is amongst the most promising next-generation energy storage technology owing to their high theoretical capacity and energy density . Nevertheless, the notorious shuttle effect of lithium polysulfides (LiPSs) seriously impedes its practical applications. Here, we report an all-CVD approach to realize the direct growth of ReS 2 @N-doped graphene (NG) heterostructure , which serves as an ultralight high-performance interlayer for elevated LiPS regulation via easy transfer onto the commercial separator. In contrast to the traditional interlayers constructed via vacuum filtration of nanostructured materials that inevitably increase the thickness and weight of the separator, our all-CVD-enabled ReS 2 @NG film possesses an area of 15 mm × 100 mm, a thickness of ~0.5 μm and a negligible areal weight of 80–90 μg cm −2 . Benefiting from the two-dimensional (2D) vertically-erected nanostructure , adsorptive ReS 2 -conductive NG interface, and favorable electrical conductivity , thus-derived ReS 2 @NG interlayer readily enhances reaction kinetics for LiPS conversion and boosts the reutilization of trapped LiPS whilst guaranteeing smooth transportation of lithium ions . Accordingly, an initial discharge capacity of 854 mAh g −1 with an average capacity decay of 0.064% per cycle after 800 cycles can be harvested at 2.0 C. Even at a high sulfur loading of 6.4 mg cm −2 , an initial areal capacity of 6.1 mAh cm −2 can be gained, which still retains 5.8 mAh cm −2 after 40 cycles at 0.1 C. This work is anticipated to shed light upon the construction of CVD-enabled versatile 2D heterostructures for enriching the interlayer design with multifunctionality and cost-effectiveness.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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界面工程
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2016
·
IF 2.933
Rong Tu,Dingheng Zheng,Hong Cheng,Mingwei Hu,Song Zhang,Mingxu Han,Takashi Goto,Lianmeng Zhang
Halide chemical vapor deposition process was carried out for fast fabricating oriented stoichiometric β-SiC through controlling flow rate of precursors (SiCl 4 and CH 4 ). The effects of molar ratio of C and Si precursors ( R C/Si ) on composition, preferred orientation, microstructure and deposition rate ( R dep ) were investigated. The deposits transformed from silicon-rich to stoichiometric β-SiC to carbon-rich with increasing R C/Si . 〈110〉-oriented stoichiometric β-SiC with lower density of defects were obtained at R C/Si in the range of 0.86–1.00, where the maximum R dep was 883 μm/h at R C/Si = 1.00, leading to a thickness of 1.7 mm in 2 h deposition. Formation of ridge-like morphology has been discussed based on a twin plane propagation model .
研究领域:
材料科学
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无机非金属材料
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薄膜制备技术
·
晶体生长
·
结构表征
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Ming Liu,Guoqiang Shao,Pengpeng Lv,Jun Li,Qingshan Zhu
The fluidization quality significantly affects the mass transfer and the deposition reaction, which determine the uniformity of deposited TiO 2 thin films on fluorophlogopite particles. It was found that the effective addition ratio of nano-TiO 2 particles is above 0.2 wt% to realize fluidization of fluorophlogopite particles. The addition of nano-TiO 2 particles leads to competitive deposition between free TiO 2 particles and fluorophlogopite particles, which decreased the coating rate of TiO 2 on fluorophlogopite particle. Besides, the existence of free TiO 2 particles on pearlescent pigment particles decreases the glossiness. The gas-solid ratio primarily determines the number of the free TiO 2 particles on pearlescent pigment particles. It was summarized that the optimal value of addition ratio of nano-TiO 2 is 0.4 wt% with the gas-solid ratio of ∼0.05 m 3 kg −1 h −1 to enhance the fluidization quality on the one hand, and to reduce the free TiO 2 particles on the other hand.
研究领域:
化学工程
·
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 57
·期 1
·015104
·
IF 3.4
Songhao Wu,Zichun Liu,Han Yang,Yeliang Wang
As a simple and effective method for improving the crystalline quality of epitaxial Ga2O3 film, post-thermal treatment has been identified as a competitive process involving crystal reconstruction accompanied by defect formation. In this study, β-Ga2O3 films grown on a c-sapphire substrate using low-pressure chemical vapor deposition were subjected to thermal treatment at 1000 °C in air for various duration to investigate the effects of treatment time on the films. The full width at half maximum (FWHM) of x-ray rocking curves initially decreased from 1.62° to 0.98° with increasing treatment time up to 5 h, indicating improved crystallinity. This improvement is likely a result of the reduced angle between Ga2O3 grains and the reconstructed Ga2O3 lattice, oriented towards the (−201) plane due to the thermal treatment, as observed in the transmission electron microscope and electron back-scattering diffraction results. However, under 7 h of treatment, the crystallinity of Ga2O3 degraded, as evidenced by an increased FWHM, as well as by x-ray photoelectron spectroscopy, photoluminescence, and time-of-flight secondary ion mass spectrometry results. This degradation can be attributed to the presence of massive oxygen vacancies and the substitutional incorporation of nitrogen into oxygen sites (NO), resulting in defects.
研究领域:
材料科学
·
晶体生长
✓ 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）