JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Mingjun Cui,Siming Ren,Qunji Xue,Haichao Zhao,Liping Wang
Inspired by the high water solubility and low cytotoxicity of N doped carbon dots (CDs) prepared by using antibiotic aminosalicylic acid (ASA) as precursor, we anticipate that these CDs may possess an excellent protective ability to inhibit the corrosion of carbon steel in aggressive solutions owing to its special structure. Therefore, the investigation on the inhibiting effect of CDs as eco-friendly corrosion inhibitor for Q235 carbon steel corrosion in 1 M HCl solution is first reported. Electrochemical techniques , weight loss, morphological and elements characterization are combined to investigate the inhibiting effect and corrosion mechanism. The results show that corrosion of Q235 carbon steel in 1 M HCl solution is significantly inhibited by the addition of CDs, which is attributed to the formation of CDs adsorption film, and the adsorption of CDs obeys a Langmuir adsorption isotherm . Besides, the protection efficiency increases with increasing concentration of CDs and prolonged immersion time, and reaches equilibrium eventually.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yuan Xia,Xiaohang Zhu,PengPeng Qiu,Mengjie Li,Bo Wang,Guojuan Hai
Titania is considered to be an attractive candidate as anode for sodium ion batteries due to excellent cycle stability, advanced safety features, and small volume deformation in the charge-discharge process. However, limited by sodium storage mechanism, the fast charge and discharge performance of multi-crystals titania is failed to satisfy the requirements of commercial application. Here, we develop a Matryoshka-like carbon nanotubes@anatase nanocrystalline@amorphous carbon (CNTs@aTiO 2 @C) nanofibers for ultrafast sodium ion storage. A nano-confinement coating strategy is demonstrated for constructing an intermediate layer assembled by ultrafine nanocrystalline (2-3 nm) of anatase. The synthesized Matryoshka-like nanofibers with diameters of ∼95 nm consists of amorphous carbon outer layer (10-13 nm), anatase nanocrystalline assembled intermediate layer (13-15 nm), and carbon nanotube core. Benefit from the ultra-refinement of anatase nanocrystalline and Matryoshka-like micro-morphology, the proportion of the capacitive-controlled contribution are up to 90.1 %, 90.6%, 91.9 %, 92.3%, and 93.6% with sweep rate increased from 0.2 to 0.4, 0.6, 0.8, and 1.0 mV s −1 , thus result in an outstanding reversible specific capacities of ∼120 mA h g −1 with Coulombic efficiency of ∼99.5% after long-life of 10000 cycles at ultrafast rate of 10 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Zekai Miao,Zhenkun Guo,Guofeng Qiu,Wenke Jia,Keran Jiao,Yixin Zhang,Jianjun Wu
Coal gasification fine slag (FS), classified as an industrial solid waste, is composed of residual carbon (RC) and slag particles (SP). The simultaneous utilization of RC and SP to prepare hierarchical porous composite (HTC) could realize the value-added utilization of FS. The role of SP in FS on HTC preparation is extremely vital and worthy of study. In this paper, FS was successfully used to synthesize HTCs for CO 2 adsorption. Orthogonal experiment was conducted to study the effect of SP on the properties of the synthesized HTCs. The changes of impregnation conditions could be effective for developing pore structure of HTCs and the surface area increased by 226 m 2 /g. Furthermore, the role of SP in FS on HTCs preparation was analyzed. After chemical activation, there was generation of many new pores in SP that the surface area and pore volume could reach 302 m 2 /g and 0.271 cm 3 /g. Besides, the leached metallic elements in the process of KOH impregnation could affect the mesopore development. The HTCs also proved to be attractive for CO 2 capture. The highest CO 2 adsorption capacity of 2.35 mmol/g at 25 °C was achieved with 5-PH-FSHCT sample. It also exhibited good selectivity of CO 2 over N 2 of 9.5. Furthermore, the sample had not only fast adsorption kinetics that it reached saturation levels in about 1.5 min, but also excellent regeneration efficiency 97% after ten cycles. All results suggest that FS has a great potential to be reused as a high performance adsorbent for practical and industrial CO 2 adsorption applications.
研究领域:
能源与环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 5
·49781
·
IF 2.52
Qi Li,Xiaojuan Tian,Ni Wu,Yun Li,Ting Pan,Bing Zhang,Yongli Duan,Shuyang Wang,Yongfeng Li
Graphene-based composite is promising as thermal interface material (TIM) due to its outstanding thermal properties. However, there are some bottlenecks to excellent performance, such as agglomeration of particles and undesirable voids between nanoplatelets. In this work, a composite with three-dimensional (3D) thermally conductive network has been assembled, which combines three kinds of nanofillers varying geometric dimensions. Thermal conductivity (TC) of composite with graphene nanoplatelets (GNPs) and carbon-nanotubes (CNTs) at a weight ratio of 3:1 is around 9% higher than that of GNP-based composite. By the introduction of carbon spheres (CSs), the TC is further increased by 28%. The enhanced thermal property further demonstrated by FLIR infrared camera is attributed to the formation of 3D heat conduction paths by GNPs, CNTs, and CSs, where the GNPs play the role of thermally conductive backbones. The other two components are introduced to attenuate the aggregation and strong thermal anisotropy. Moreover, the TC is confirmed nearly isotropic, which is different from most graphene-based TIMs because of the in-plane alignment. Our results indicate that the apparent synergy endows this 3D nanofiller great potential for heat dissipation applications requiring heat removal in two directions.
研究领域:
材料科学
·
热管理技术
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Runqiang Liu,Bo Li,Fang Li,Volodymyr Dubovyk,Yuqi Chang,Dongdong Li,Kunjie Ding,Qiwen Ran,Guifang Wang,Hongyuan Zhao
Carbendazim (CBZ) abuse always causes the over-standard of pesticide residues in agricultural products, which has adverse effects on human health. Herein, a novel electrochemical sensor was firstly fabricated based on the β-cyclodextrin (β-CD) functionalized carbon nanosheets@carbon nanotubes (CNS@CNT) for the CBZ determination. CNS@CNT combined large surface area of CNS and excellent electrical conductivity of CNT, which significantly enhanced the electrocatalytic performance. Moreover, β-CD possessed excellent host-gest supramolecular recognition ability, which could improve the selective recognition and enrichment capability of CBZ. Thanks to the synergistic interaction of CNS@CNT and β-CD, the β-CD/CNS@CNT/GCE sensor exhibited a low limit of detection of 9.4 nM in the linear CBZ concentration range of 0.03–30 μM. The fabricated sensor presented favorable stability, high sensitivity (30.86 μA μM −1 cm −2 ), and reliable reproducibility (RSD = 3.6%). Especially, the β-CD/CNS@CNT/GCE sensor could show pretty practical feasibility for the detection of CBZ in apple juice with recoveries of 97.1%-99.4%.
研究领域:
分析化学
·
食品安全
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Yuanfeng Wu,Xianghai Song,Jiahui Zhang,Shuai Li,Xinghui Yang,Huazheng Wang,Ruiping Wei,Lijing Gao,Jin Zhang,Guomin Xiao
A series of Ce 1- x Cd x O mixed oxide catalysts prepared by co-precipitation method were tested for synthesis of glycerol carbonate (GC) from glycerol and diethyl carbonate (DEC). The microstructural and physicochemical properties of the bimetal catalysts were characterized by XRD, SEM, TEM, XPS, CO 2 -TPD, N 2 -adsorption, TG-DSC and 1 H NMR. The results show that the spherical particles of CdO were uniformly dispersed on the surface of lamellar CeO 2 . Besides, a noticeable increase was observed in the moderate basic sites concentration, because more oxygen atoms were adsorbed on the bimetal sample surface which was attributed to Ce 4+ doped into CdO lattice. The Ce 0.7 Cd 0.3 O sample annealed at 500 °C was observed with the highest catalytic activity. 96.84% of glycerol conversion and 100% selectivity to GC were obtained over this catalyst under the optimized conditions (5 wt.% catalyst of glycerol, 90 °C, 180 min, glycerol/DEC molar ratio of 1:3). Besides, it was found that the conversion of glycerol carbonate was synergistically accelerated by the moderate and strong basic sites.
研究领域:
催化化学
·
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Weili An,Ben Xiang,Jijiang Fu,Shixiong Mei,Siguang Guo,Kaifu Huo,Xuming Zhang,Biao Gao,Paul K. Chu
Although silicon (Si) is regarded as one of promising anode materials in next-generation lithium-ion batteries (LIBs) due to the high specific capacity, commercial application is stifled by the large volume effect and small electric conductivity . Using rice husk (RH) biomass as nano Si source (RH-Nano Si), here we designed and fabricated the three-dimensional (3D) carbon-hybridized nano-Si hierarchical architecture composite (RH-Nano Si@C/CNT) via assembling Si with CNT by the self-electrostatic route, reinforcing by hydrothermal treating in a glucose solution, and calcination in Ar. In RH-Nano Si@C/CNT, the Si nanoparticles are anchored on the 3D conductive CNT network by the glucose-derived carbon through welding and coating, thus providing enhanced electrical contact and high structural integrity. As anode materials, RH-Nano Si@C/CNT exhibits improved rate capability and prolonged cycling stability compared to Si and CNT self-electrostatic sample. Boasting a high reversible capacity of 989.5 mAh g −1 at 0.5C (1C = 4.2 A g −1 ) and 345 mAh g −1 at 3C as well as low capacity decay of 0.035% per cycles after 1000 cycles, RH-Nano Si@C/CNT produced by this technique is promising as anodes in LIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xingping Lu,Yating Hu,Li Wang,Qiaohui Guo,Shuiliang Chen,Shouhui Chen,Haoqing Hou,Yonghai Song
A novel kenaf stem-derived porous carbon/nitrogen-doped carbon nanotubes/polyaniline (denoted as KSC/NCNTs/PANI) nanocomposite was constructed in this work. Three-dimensional (3D) KSC/NCNTs nanocomposites were firstly constructed through a CVD method. The NCNTs were densely distributed on the channel walls of KSC, which increased both the effective surface area and the active sites greatly. Then, the PANI was grown on the KSC/NCNTs by using in situ chemical oxidation polymerization method. The obtained 3D KSC/NCNTs/PANI nanocomposites were carefully characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and Raman spectra. The nanocomposites were employed as the electrode materials of supercapacitors owing to their unique advantages originating from both PANI (e.g. interesting electroactivity, high pseudocapacitance, unusual doping/dedoping chemistry) and KSC/NCNTs (e.g. large specific surface area, high porosity, good electrical conductivity), and exhibited a high specific capacitance. At the current density of 0.1 A g −1 , the KSC/NCNTs/PANI nanocomposites showed a specific capacitance of 1090 F g −1 with a specific energy density around 97 Wh kg −1 . Moreover, the specific capacitance remained 96.9% after 1000 charging/discharging cycles at a current density of 0.1 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2015
·Vol. 29
·期 4
·240-243
·
IF 2.248
Dongsheng Bai,Zhiyong Zhang,Guangjian Wang,Fang Ma
The cycloaddition of epoxide and CO 2 to synthesize cyclic carbonate catalyzed by VO(IV) porphyrin was achieved under 1.4 MPa at 150°C. The effects of reaction temperature, time, CO 2 pressure, co-catalyst and porphyrin framework were investigated. The catalytic results showed that moderate to high yields of cyclic carbonates were obtained under the optimal reaction conditions. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
化学
·
环境科学
✓ 已验证
DOI
高影响因子
GEOCHIMICA ET COSMOCHIMICA ACTA
·
2022
·
IF 5.921
Jiali Lei,Sayan Sen,Yuan Li,J ZhangZhou
The storage of carbon in Earth’s mantle is an important consideration within the framework of the deep carbon cycle . In the deep (>250 km depth) reduced mantle, carbon storage mechanisms differ greatly from those in the oxidized shallow mantle. To investigate the stability of carbon-bearing phases in Earth’s deep mantle, we experimentally constrained compositional effects on phase stability in the Fe-Ni-S-C system at conditions relevant to the deep upper mantle and mantle transition zone. Our experiments suggest that carbide is absent at 10 GPa and 1450 °C in the Ni-poor (molar Ni/(Ni + Fe) = 0.2) portion of the metal-sulfide-carbon ternary, with carbon occurring as diamond or dissolved in the Fe-Ni-S-C melt. At 19 GPa and 1450 and 1600 °C, (Fe,Ni) 7 C 3 saturates in the melt with C-rich (4.78–9.47 wt%), S-poor (2.29–6.98 wt%) bulk compositions. In comparison, Fe-Ni alloy only saturates with the C- and S-poor bulk composition of 77.88 wt% Fe, 19.47 wt% Ni, 1.93 wt% S, and 0.72 wt% C. Based on these results, we trained machine learning models to predict carbon solubility in Fe-Ni-S-C melts. Compared to classical regression models, machine learning models significantly improve the accuracy of carbon solubility predictions. Combined, our experimental and machine learning results suggest that diamond and Fe-Ni-S-C melt are the primary hosts of carbon in the convecting deep upper mantle and throughout most of the mantle transition zone. In the deepest parts of the transition zone, however, carbide is likely to precipitate at adiabatic temperatures in C-rich mantle sources .
研究领域:
地质学
·
地球化学
·
材料科学
·
机器学习
✓ 已验证
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2018
·Vol. 15
·期 6
·1510-1517
·
IF 1.165
Lulu Zhou,Yong Cheng,Wenfa Zhang,Wenli Zhang,Weihua Liu,Yunbo Li,Mouhua Wang
An interesting method for radiation cross-linking polycarbosilane (PCS) at high efficiency and low cost was developed by adding multifunctional monomers (trimethylolpropane trimethacrylate (TMPTMA) or divinylbenzene (DVB)). The effect of multifunctional monomers on the radiation cross-linking and ceramic yield of PCS was investigated. The results revealed that the addition of a small amount of multifunctional monomer can substantially improve the ceramic yield and reduce the absorbed dose by promoting cross-linking. The ceramic yields of radiation cross-linked “PCS/2%DVB (300 kGy)” and “PCS/2%TMPTMA (300 kGy)” were 74 wt% and 78 wt%, respectively, while that of the radiation cross-linked “PCS (300 kGy)” was only 64 wt%. The presence of double bonds in multifunctional monomers stimulated the combination reactions of free radicals in PCS induced by γ-ray irradiation and subsequently enhanced the efficiency of cross-linking. Furthermore, it was found that the incorporation of a small amount of multifunctional monomer hardly affected the chemical composition and crystallization behavior of the final SiC ceramics.
研究领域:
材料科学
·
辐射化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 49
·期 2
·312-321
·
IF 4.052
Yuanfeng Wu,Xianghai Song,Siquan Xu,Yuan Chen,Olayinka Oderinde,Lijing Gao,Ruiping Wei,Guomin Xiao
Bimetal mixed MOFs of [CoZn][(BDC)(DABCO)0.5] (CZ-BDO), [CoNi][(BDC)(DABCO)0.5] (CN-BDO), and [NiZn][(BDC)(DABCO)0.5] (NZ-BDO) were prepared under solvothermal conditions and further employed as highly active accelerants for converting carbon dioxide into cyclic carbonates. The characteristics of the bimetal compounds were revealed via various techniques, including ICP-OES, XRD, FT-IR, Raman, XPS, SEM, EDS maps, N2 adsorption, TG-DTG, and CO2/NH3-TPD. The catalytic results revealed that CZ-BDO is superior to the other samples for obtaining a satisfactory chloropropene carbonate (CPC) yield. The excellent catalytic activity may be owing to the presence of a solid solution within the Co and Zn bimetal sample, which provides synergistic catalysis in the carbon dioxide cycloaddition. In addition, the synergistic catalysis was further confirmed by the NH3-TPD profiles, whereby the amount of CZ-BDO basic sites was obviously enhanced compared to the other samples. Furthermore, DFT calculations were also performed to reveal the synergistic catalysis between Co and Zn for the coupling reaction. Additionally, when the coupling reaction was carried out at 100 °C for 5 h in the presence of 0.5 wt% epichlorohydrin (ECH) as a catalyst at 3.0 MPa, 99.31% conversion of ECH and 97.05% yield of CPC were obtained over the optimal CZ-BDO sample. Moreover, the bimetal sample can also efficiently convert other epoxides into the corresponding cyclic carbonates.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）