JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Pan Zhang,Lemeng Wang,Chunjie Lu,Mengying Li,Shujun Yu,Dong Fu
The surface tensions of 2‑diethylaminoethanol (DEAE)‑ N ‑(2‑aminoethyl)ethanolamine (AEEA), DEAE‑ N ‑methyl‑1,3‑propane‑diamine (MAPA) and DEAE‑1,4‑butanediamine (BDA) aqueous solutions have been measured by using the BZY-1 surface tension meter. The mass fractions of DEAE and AEEA/MAPA/BDA respectively ranged from 0.300 to 0.500 and 0.050 to 0.150. The temperature ranged from 303.2 K to 323.2 K. A thermodynamic equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fraction of amines on the surface tension were demonstrated on the basis of experiments and calculations. The surface thermodynamics including surface enthalpy and surface entropy of blended amine aqueous solutions were also determined, and their temperature and mass fraction dependences were analyzed.
研究领域:
物理化学
·
溶液化学
·
热力学
·
表面科学
·
化工材料
✓ 已验证
DOI
高影响因子
Nano Select
·
2021
·Vol. 2
·期 11
·2135-2147
·
IF 0
Puhong Wen,Xiaowen Jiang,Qian He,Dengwei Hu,Lijun Ren,Weixing Zhao
The tetragonal phase Nb 2 O 5 (T-Nb 2 O 5 ) nanobelts with preferentially exposed the (010) facet have been successfully prepared for the first time by insitu topological reaction using the KNb 3 O 8 nanobelts as the precursor. Meanwhile, the transformation mechanism of the crystal structure and morphology from the layered KNb 3 O 8 nanobelt to the T-Nb 2 O 5 nanobelt was revealed in detail by using XRD, FE-SEM, TEM, HRTEM, SAED, UV-vis DRS, EDX, XPS, and Raman spectra. In addition, Ag deposited T-Nb 2 O 5 (Ag/T-Nb 2 O 5 ) nanobelts were prepared by photo-reduction reaction. The photoelectrochemical properties of the T-Nb 2 O 5 nanobelts and Ag/T-Nb 2 O 5 nanobelts as a photocatalyst were evaluated by splitting water under simulated sunlight. The results show that the photocurrent density generated by the prepared Ag/T-Nb 2 O 5 sample is 48.1 µA∙cm −2 , which is 2.3 times that of the T-Nb 2 O 5 sample, and the prepared tetragonal phase T-Nb 2 O 5 nanobelts produce a photocurrent value 1.5 times that of the contrast orthogonal phase O-Nb 2 O 5 nanosheets. It indicates that the (010) facet of the tetragonal phase Nb 2 O 5 is one of the highest photocatalytic active surfaces, and the visible light utilization efficiency of the T-Nb 2 O 5 nanobelt with Ag deposited on the surface has been significantly improved, which implies that it has potential applications in the field of photocatalysis.
研究领域:
材料科学
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纳米科技
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光催化
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能源化学
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半导体材料
·
表面科学
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jing Jiang,Jiayi Zhang,Baihao Wu,Sheng Tu
The regulation of the metal-support interaction in heterogeneous catalysts can promote the activation of reactants, which is beneficial for the hydrolytic dehydrogenation reaction. Herein, the hydrolytic dehydrogenation of dimethylamine borane (DMAB) is systematically studied on the oxygen vacancy (O v ) enriched Pt-Co 3 O 4 heterogeneous catalyst with the metal-support interaction. It is found that the metallic Pt site facilitates the adsorption of DMAB molecules and the O v on Co 3 O 4 support as an electron-rich center cooperates with the adjacent Pt site to dissociate water molecules. The in situ Raman and attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) spectroscopy reveal the effective activation and cleavage of the O-H in water and the B-H in DMAB over the Pt-Co 3 O 4 catalyst. The optimal Pt-Co 3 O 4 catalyst exhibits the extraordinary activity for the catalytic hydrolysis of DMAB at 303 K, delivering a high specific hydrogen generation rate (64063 mL min −1 g pt −1 ) and a competitive turnover frequency (TOF, 23880 mol H2 mol Pt −1 h −1 ). This performance outperforms most of the reported heterogeneous catalysts for DMAB dehydrogenation . More importantly, the Pt-Co 3 O 4 catalyst achieves the desirable on-demand hydrogen production by using special chemical switches. This finding provides the fundamental understanding of metal-oxide systems with the collaborative interfacial catalysis for boosting DMAB dehydrogenation .
研究领域:
催化化学
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纳米材料科学
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能源化学
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表面科学
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多相催化
·
氢能存储与释放
✓ 已验证
DOI
高影响因子
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
·
2022
·
IF 5.168
Lili Yang,Chunlin Xie,Tian Ao,Kaixiao Cui,Guancheng Jiang,Baojun Bai,Yongwei Zhang,Jun Yang,Xingxing Wang,Weiguo Tian
Lost circulation has been a serious problem to be solved in many drilling practices during oil, gas and geothermal well drillings. Many materials have been developed and evaluated for the purpose. However, their performance to plug severe leakoff is very limited. Herein, an injectable self-healing hydrogel based on polyampholyte with sulfonated and quaternary ammonium functionalities (P(MPTC- co -NaSS)) was developed and comprehensively evaluated to prevent the severe loss of fluids to formation. By incorporating cation-π (π is for aromatic residues) interaction, the hydrogel shown self-healing property and robustness in severe environment (temperature, salt) by comparison with other hydrogels merely consisting of cation-anion and H-bonding interactions. Aromatic residues enhanced thermal stability above 310 °C. The plugging measurement shown that an addition of 2 wt% dried gel particles can plug high-permeability formation and endure a high pressure of 6 MPa, produce much lower circulation loss and result in a dramatically increased loss volume reduction rate (63.5%) compared with a commercial polymer gel product and an inert material (9.4%) after a self-healing process. Markedly, P(MPTC- co -NaSS) can be used in a wide range of formation temperature (as high as 150 °C) and salt concentrations (NaCl, CaCl 2 , as high as 15 wt %). In addition to suitable particle size and mechanically robustness, it was also attributed to the soft, swelling, deformable, toughness and self-healable features of P(MPTC- co -NaSS) gel particles as well as the strong adhesion to negatively charged formations in water, even under high thermal and saline condition. These characteristics also contributed to a long-term plugging performance, beneficial to avoid repeated lost circulation in drilling operation. Besides, this self-healing polyampholyte gel particles dispersed well in saline fluid and maintained stable rheological properties after hot rolling, which was favorable to drilling fluid circulation. This study shown the application potential of self-healing materials as plugging material candidate in petroleum drilling industry.
研究领域:
石油工程
·
钻井技术
·
功能高分子材料
·
流体损失控制
·
油田化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 15
·
IF 1.64
Dan Wang,Zhongling Zhao,Lina Yu,Kejin Zhang,Hui Na,Shanqiang Ying,Dechao Xu,Guo Zhang
The modified polypropylene (PP) separators with self-polymerization of dopamine on the surfaces are prepared by a simple solution-immersion method to improve the interfacial hydrophilic and discharge performance. The contact angle test and the liquid electrolyte uptake capacity test results show that the wettability and the electrolyte-retention ability of polydopamine-modified separator are improved significantly. The robust and thin polydopamine layer on the surface also enhances thermal performance and tensile strength of the modified PP separator certified by DSC and tensile strength tests. The ionic conductivity of the modified PP separator is up to 3.08 mS·cm −1 , ∼2.5 times of the bare separator. Good discharge capacity retention and C-rate discharge performance are demonstrated by a 2025 coin half-cell with the liquid electrolyte-soaked polydopamine modified PP separator sandwiched between lithium metal anode and LiFePO 4 cathode. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40543.
研究领域:
材料科学
·
电化学
·
高分子化学
·
能源材料
·
电池技术
✓ 已验证
DOI
高影响因子
Solar RRL
·
2021
·Vol. 6
·期 4
·2100798
·
IF 8.582
Manjing Wang,Sanlong Wang,Qixing Zhang,Sanjiang Pan,Ying Zhao,Xiaodan Zhang
Finding a cost-effective semiconductor with commercial performance for photoelectrochemical (PEC) water splitting remains challenging. Sb 2 Se 3 , as a low-cost semiconductor, has excellent photo/electric properties for PEC water splitting. Via adjusting the Sb/Se ratio in the precursor ink, the Sb 2 Se 3 with favorable crystallographic orientation can be effectively controlled. The ink with an atomic ratio of Sb/Se = 1:3 induces the growth of a compact Sb 2 Se 3 film with a preferred orientation, resulting in rapid charge transport and high photocurrent. After depositing TiO 2 and Pt in turn, the photocathode with a structure of FTO/Au/Sb 2 Se 3 /TiO 2 /Pt exhibits a photocurrent density of 11.3 mA cm −2 at 0 V RHE . An unassisted solar water splitting device integrating the Sb 2 Se 3 -based photocathode with an inorganic perovskite photovoltaic cell achieves a solar-to-hydrogen efficiency of 2.45%. The efficient Sb 2 Se 3 -based photocathode shows promising potential for solar fuel production.
研究领域:
材料科学
·
物理化学
·
能源化学
·
半导体光电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 6
·期 3
·1801663
·
IF 4.834
Wentian Huang,Qingwei Zhou,Shaoqiang Su,Jing Li,Xubin Lu,Xingsen Gao,Xin Wang,Mingliang Jin,Guofu Zhou,Zhang Zhang,Junming Liu
Loading 2D layered transition metal dichalcogenides (TMDs) on p-type silicon photocathode is suitable for hydrogen production in solar-driven photoelectrochemical (PEC) water splitting. Similarly, various nanostructured TMDs exposing more active sites are widely explored for improving the PEC performances of composite photoelectrodes. Here, defect engineering using a controllable argon ion beam bombardment is presented on ReS 2 /Si photocathode. The atomic vacancy defects are introduced on the 2D ReS 2 to realize high-density active sites, which significantly enhance the solar-driven hydrogen evolution reaction performance of ReS 2 /Si photocathode. The highest photocurrent density of 18.5 mA cm −2 (at 0 V vs reversible hydrogen electrode) is achieved, under a simulated sun irradiation.
研究领域:
材料科学
·
光催化
·
能源化学
·
半导体器件
·
纳米科技
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·Vol. 378
·期 1
·30-35
·
IF 3.07
Shangkun Li,Xiaofeng Lu,Xiang Li,Yanpeng Xue,Chengcheng Zhang,Junyu Lei,Ce Wang
A reactive-template vapor phase polymerization method for the preparation of bamboo-like polypyrrole (PPy) nanotubes has been successfully demonstrated in this paper. Herein, electrospun V 2 O 5 nanofibers were chosen as templates to deposit PPy, which served as the oxidants as well. This method can provide the fabrication of PPy nanostructures more easily than conventional routes due to its independence of removing template, which is usually a complex and tedious experimental process. The application of bamboo-like PPy nanotubes for Cr(VI) ions removal in aqueous solution has been explored. The resulting bamboo-like PPy nanotubes exhibited much higher adsorption performance than traditional PPy nanoparticles.
研究领域:
环境科学
·
纳米材料
·
高分子化学
·
环境污染治理
·
吸附技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 2
·140
·
IF 2.8
Ma Di,He Hao,Huang Xinglan,Wang Jingcheng,Hu Xuebu
The inhomogeneous plating/stripping of zinc and side reactions originating from the dissolution of the cathode material in water lead to the poor stability of zinc anode, which inevitably limits the practical application of zinc-based aqueous batteries. Therefore, a novel hydrogel electrolyte made of hydroxyethyl cellulose/polyacrylamide (HEC/PAM) with a 3D network-like structure is synthesized by radical polymerization and cross-linking reinforcement. Thanks to the porous crosslinked network and massive hydrophilic groups, the electrolyte has high ion conductivity of 3.17 × 10 –2 S cm −2 and decomposition voltage of 2.6431 V. The ion conductive hydrophilic groups facilitate the interfacial compatibility of the electrode with the electrolyte and stabilize zinc plating/stripping, which suppresses the formation of zinc dendrites. Meanwhile, the hydrogel electrolyte effectively alleviates the dissolution of the positive electrode and the occurrence of side reactions, and subsequently improves the stability of the electrode. As a result, the assembled Zn–Zn symmetric cell with HEC/PAM hydrogel electrolyte is stable without short circuit and rapid increase of overvoltage at 5 mA cm −2 . The polarization voltage of the assembled Zn–Cu half-cell is 59.2 mV and initial coulomb efficiency reaches 94.3%. The assembled Zn–V 2 O 5 ·nH 2 O/CNT full cell delivers an excellent cycling stability of 186.9 mAh g −1 at 0.5 A g −1 after 500 cycles with a high-capacity retention of 92.5% (only 52.1% in aqueous system). The new idea is provided for further development of functional hydrogel electrolytes in zinc-ion batteries.
研究领域:
电化学
·
能源材料
·
功能高分子
·
电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Jing Zhou,Dapeng Li,Shutong Chen,Yao Xu,Xue Geng,Chaoran Guo,Yong Huang
The immobilization of sedimentary phosphorus (P) by capping sediments with amended calcium peroxide material (ACPM) and CaO 2 was investigated, the sediments and overlying water from a black-odor river. Under the capping with ACPM and CaO 2 , the pH and dissolved oxygen (DO) in the overlying water were higher than in the control. This contributed to the more loss of external P under the ACPM (the phosphate sorption was fitted well by the Langmuir equation, the maximum P sorption capacity up to 29.28 mg P g −1 ). Additionally, ACPM improves the decrease of the reduction materials (e.g., NH 4 + -N, Fe 2+ ) in the pore water compared to that associated with CaO 2 , resulting in a less obvious dissolved inorganic P (DIP) in the pore water, but the accumulation of DIP in the pore water with CaO 2 suggested an explosive release once the micro-environment conditions encounters adverse conditions. The sharp reduction of Fe/Al-P and Res-P contributes to the increase of DIP in the pore water, with a release of up to 390.60 mg P kg −1 DW (dry weight), whereas the value is only 62.55 mg P kg −1 DW when capped with ACPM. Correspondingly, the percentage of the bioavailable P to Tot-P decreases rapidly from 17.27% (control, 0–2 cm) to 7.21% (ACPM, 0–2 cm) and 10.57% (CaO 2 , 0–2 cm), indicating the obvious P immobilization. The implication is that the application of CaO 2 is not suitable for direct use, while the combination with other materials (e.g., WPS) is a better choice.
研究领域:
环境科学
·
水体修复
·
环境化学
·
污染控制
·
沉积物管理
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Haihua Wang,Wenjing Zhang,Yongning Ma,Guiqiang Fei,Huan Wen,Liyu Sun,Yanming Shao,Yong-Mook Kang
The compatibility between polypyrrole (PPy) and waterborne epoxy coating (EP) remains the main challenge. Here, phosphorylated poly (vinyl alcohol) (PPVA) and p-toluene sulfonic acid sodium (p-TSA) were simultaneously utilized as dopants to modify PPy and prepare water dispersible PPVA/p-TSA/PPy (PPVAT/PPy) solution. Additionally, poly (vinyl alcohol) (PVA) and TSA were also adopted to prepare PVA/p-TSA/PPy (PVAT/PPy) for comparison. Denser film with granular morphology was observed for PPVAT/PPy nanocomposite film. Compared with PVAT/PPy-40 %, the tensile strength of PPVAT-8.0 %/PPy-40 % increased from 248.8–283.9 MPa. PPVAT/PPy displayed higher compatibility and interactions with EP compared to PPy-TSA and PVAT/PPy. Compared with EP, the impedance modulus of PVAT/PPy+EP and PPVAT/PPy+EP increased from 3.17×10 5 to 1.07×10 8 and 1.62×10 9 Ω·cm 2 ; corrosion current density I corr decreased from 1.49×10 −6 to 7.72×10 -8 and 4.01×10 -9 A·cm -2 ; corrosion potential E corr displayed a positive shift of 230 mV and 269 mV, respectively. The corrosion inhibition efficiency of PPVAT/PPy+EP reached 99.83 %, which is much higher than that of PVAT/PPy+EP (93.97 %). PPVAT/PPy+EP nanocomposite coating has been proved to have preferable long-term corrosion resistance based on electrochemical impedance spectra (EIS), polarization curves and salt water spray test. The simultaneous incorporation of phosphate anions, sulfate ions and PPy into EP was beneficial to fabricate high-performance anticorrosion coating.
研究领域:
材料科学
·
高分子化学
·
腐蚀防护
·
纳米复合材料
·
表面工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xi-Ming Song,Xin Zhou,Chunxue Yuan,Yu Zhang,Qiang Tong,Ying Li,Luxia Cui,Daliang Liu,Wei Zhang
We reported a novel Fe 2 O 3 /rutile TiO 2 nanorod (NR) arrays with the heterogeneous structure for photoelectrochemical (PEC) cells, which were fabricated on fluorine-doped tin oxide glass (FTO) substrates that serve as model architecture via a hydrothermal method. Fe 2 O 3 was revealed as an inexpensive and eco-friendly semiconductor sensitizer to make TiO 2 respond to visible light . By using this photoanode, the photoelectric conversion and water splitting properties of PEC cells based on the one-dimensional (1D) Fe 2 O 3 /TiO 2 heterostructures were investigated in detail under simulated sunlight. Meanwhile, the optimization of photovoltaic performance was also achieved by regulating the amount of Fe 2 O 3 . The open circuit voltage and short circuit current of the Fe 2 O 3 /TiO 2 solar cell can reach 0.435 V and 1.840 mA/cm 2 , respectively. In addition, theoretical analysis of the photoelectric effect is preliminarily explored on the basis of the flat band potential results.
研究领域:
材料科学
·
物理化学
·
能源科学
·
纳米科技
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）