ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Fengdong Qu,Wenan Shang,Dongting Wang,Shiyu Du,Tiju Thomas,Shengping Ruan,Minghui Yang
Multishell, stable, porous metal-oxide microspheres (Ni–Co oxides, Co3O4 and NiO) have been synthesized through the amorphous coordination polymer-based self-templated method. Both oxides of Ni and Co show poor selectivity to xylene, but the composite phase has substantial selectivity (e.g., Sxylene/Sethanol = 2.69) and remarkable sensitivity (11.5–5 ppm xylene at 255 °C). The short response and recovery times (6 and 9 s), excellent humidity-resistance performance (with coefficient of variation = 11.4%), good cyclability, and long-term stability (sensitivity attenuation of ∼9.5% after 30 days and stable sensitivity thereafter) all show that this composite is a competitive solution to the problem of xylene sensing. The sensing performances are evidently due to the high specific surface area and the nano-heterostructure in the composite phase.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Yan Chen,Yufan Liu,Huizhen Jin,Xinyue Wang,Guowen Wang,Hongchao Ma,Vadivel Subramaniam,Krishnamoorthy Ramachandran,Xinghui Liu
Antibiotic drugs are biotoxic and difficult to degrade, causing irreversible effects on aquatic environment and human health. The photoelectrocatalytic (PEC) process is regarded as a promising strategy for simultaneously addressing environmental pollution and the energy crisis. Herein, a plum tree-type composite semiconductor photoanode MnOx@Co/NC-x with core-shell heterostructures was constructed to evaluate the PEC activity for sulfamethoxazole (SMX). The synergistic effects of Co nanoparticles, a high content of graphitic N, an open framework, and interfacial structures played a decisive role in improving the PEC activity of the MnOx@Co/NC-x system. The engineered micro-nano structure significantly improved the specific surface area and conductivity of electrode materials, and promoted the diffusion of electrolyte. Among them, MnOx@Co/NC-500 photoanode exhibited the best performance (reached 98.92% in 50 min), cyclic stability and repeatability. The results showed that it was feasible to construct a high-performance heterostructural interface for pollutant treatment based on micro-nano structure regulation and valence band matching.
研究领域:
环境催化
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材料化学
·
环境污染治理
·
纳米材料
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电化学
·
光化学
·
药物降解
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 17
·9435-9444
·
IF 14.511
Qingshan Zhao,Wanxin Ni,Xiaojie Tan,Fengliang Cao,Tengfei Liu,Hao Huang,Zhinian Cheng,Yiwen Li,Shuwei He,Hui Ning,Mingbo Wu
Selective hydrogenation of nitroarenes to corresponding anilines is one of the most important processes in the chemical industry, which still suffers from lack of efficient catalysts with both high activity and selectivity. Herein, a reinforced single-atom Co catalyst (Co–N–CNS–Th) was rationally fabricated through a novel “Trojan horse” strategy for boosting selective hydrogenation of nitroarenes. The cobalt salt precursor is confined in a mixed molten salt (KCl + CaCl2) via recrystallization and gradually released when reaching the melting point, which can efficiently achieve atomic Co–N4 moieties accommodated in micropore defect-rich carbon nanosheets. The prepared Co–N–CNS–Th catalyst showed superior hydrogenation activity and selectivity (yield of >99%; overall TOF of 169.8 h−1) towards a series of functionalized nitroarenes under mild reaction conditions, as well as remarkable stability and reusability, standing out among the reported cobalt-based catalysts. The experimental results and DFT calculations reveal that the robust atomically dispersed Co–N4 active sites located near the edge of micropore defects can significantly accelerate the adsorption and activation of hydrogen and nitro groups, accounting for the prominent catalytic performance. This work opens a feasible avenue for the development of advanced single-atom catalysts towards selective hydrogenation of nitroarenes and beyond.
研究领域:
催化化学
·
材料科学
·
理论计算化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Xiaowen Su,Shan Wu,Xiaoxing Long,Yan Shi,Qi Pan,Jixin Su
Preventing climate change and achieving carbon neutralization depend on strengthening the carbon cycle in industry and limiting carbon emissions to ambient air. Our aim is to reduce CO 2 to valuable CO by gas-solid photo-catalytic reduction under sunlight. We prepared catalysts by one-step synthesis with graphene oxide (GO) and ZnO, surface modified with a monolayer of sulfonated cobalt phthalocyanine (CoPcS), which were calcined to obtain photocatalyst samples containing Co(II), ZnO and reduced graphene oxide (rGO). Results of TEM, SEM-EDS, XRD, XPS, PL and ESR revealed that the photocatalyst samples possessed a hybrid layer microstructure, heterojunction, and excellent electron-hole pair separation. Evaluation of the photocatalytic reduction reactivity showed that CO selectivity reached 96.2–99.0% and top CO yield was 26.15 µmol.g −1 .h −1 .
研究领域:
环境科学
·
材料科学
·
化学工程
·
光化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2020
·
IF 2.304
Muhammad Usman,Haojie Yu,Li Wang,Jianguo Qian,Xuefeng Li,Amin Khan,Kaleem-ur-Rehman Naveed,Ahsan Nazir,Tarig Elshaarani,Shah Fahad
A series of copolymers of poly(2-(methacryloyloxy) ethyl ferrocene carboxylate- co -methacrylic acid)s (P(FHEMA- co -MAA)s) were synthesized as burning rate catalysts (BRCs). Their structures were verified using proton nuclear magnetic resonance ( 1 H NMR) and Fourier transforms infrared (FT-IR) spectroscopy. The electrochemical behavior of P(FHEMA- co -MAA)s was investigated by cyclic voltammetry (CV). The CV results indicated that P(FHEMA- co -MAA)s showed redox behavior. Anti-migration test proved that P(FHEMA -co- MAA)s possesses better anti-migration properties than ferrocene (Fc) and 2, 2-bis (ethylferrocenyl) propane (Catocene). The burning rate (BR) catalytic effect of P(FHEMA -co- MAA)s on thermal decomposition of AP was examined through thermogravimetry (TG) and differential thermogravimetry (DTG). P(FHEMA -co- MAA)s were found to have high catalytic effects in accelerating thermal decomposition of ammonium perchlorate (AP).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2024
·Vol. 137
·期 3
·1535-1552
·
IF 1.7
Feng Shangzhen,Zhou Hantao,Jiang Huanjin,Yang Jie,Chen Jixiang
Herein, the Ni–Co alloy supported on TiO 2 catalysts were prepared by sol–gel method assisted with Polymethyl Methacrylate (PMMA) template, and they were tested for in situ aqueous phase hydrodeoxygenation (HDO) of methyl palmitate to hydrocarbons using methanol as hydrogen donor. It has been found that the introduction of PMMA decreases the Ni–Co alloy particles size, reduces the metal-support interactions (SMSI), constructs the mesopores and enlarges the mesopore size. Also, the Ni–Co alloy particles can be partially embedded in TiO 2 , beneficial to the catalyst stability since the sintering and leaching of the Ni–Co alloy particles can be suppressed under hydrothermal condition. In the in situ HDO of methyl palmitate, the main deoxygenation pathway is decarboxylation/decarbonylation on the Ni–Co alloy catalysts. The catalysts prepared with PMMA exhibits higher activity than that without PMMA, giving the pentadecane yield of 86.2% at 310 °C. This is ascribed to their more exposed active sites and wider mesopores. Moreover, the catalyst is not obviously deactivated during five reactions.
研究领域:
催化
·
化学工程
·
材料科学
·
环境科学
·
有机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Ming Yin,Li Zhang,Xiuxia Wei,Yiwei Sun,Shuyan Qi,Yan Chen,Xinxin Tian,Jingxuan Qiu,Dongpo Xu
This work is carried out by the synergy of Co/Ni-Bio-MOF and noble metal Au-doped coral-like ZrO 2 . A novel electrochemical aptamer sensor (aptasensor) for measuring kanamycin (Kan) was developed by using ZrO 2 @Au as an amplification platform for electrochemical aptasensors. ZrO 2 @Au was strategically used to significantly reduce the Differential Pulse Voltammetry (DPV) response by hindering electron transfer at the working electrode surface. When Kan is recognized by the ZrO 2 @Au-linked aptamer, it is disconnected from the complementary sequence attached to the Co/Ni-Bio-MOF due to the applied force, thereby disengaging from the electrode. This results in the removal of obstacles to electron transfer, enabling signal amplification. This electrochemical sensor exhibits good linearity from 10 μM to 1000 μM. It has a detection limit of 0.037 μM and has excellent stability (RSD = 0.14–0.21%), reproducibility (RSD = 0.079–0.63%) and selectivity.
研究领域:
分析化学
·
电化学
·
生物传感器
·
环境监测
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 5
·1200
·
IF 3.1
Wei Tong,Weiqiang Wang,Xiayu Leng,Jianli Song
To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.
研究领域:
材料科学
·
电化学
·
能源材料
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Ming-feng Sun,Ting Wang,Li-guang Wu,Yu-xing Wang
This study attempted to enhance the permeation and antifouling performance of polyvinylidene fluoride (PVDF) ultrafiltration membranes. Reverse microemulsion containing cobalt and iron (Co–Fe) bimetallic hydroxide nanoparticles was blended with the PVDF membranes to construct a novel PVDF hybrid membrane. The permeation performance, antifouling property, and long-term operational stability of the hybrid membranes were evaluated via ultrafiltration process of water flux and bovine serum albumin (BSA) rejection. Structural characterization showed that the protection endowed by reverse microemulsion made the hydroxide nanoparticles to distribute uniformly in the PVDF polymeric matrix. The introduction of well-distributed bimetallic hydroxide nanoparticles substantially improved the pore structures and hydrophilicity of the PVDF hybrid membranes, thereby enhancing their permeation performance and antifouling property. The optimal water flux of the PVDF hybrid membranes (MD-10) reached 328 L·m −2 ·h −1 and was 5.4-fold higher than that of neat PVDF. Moreover, the MD-10 membrane had a high a high BSA rejection rate (91.04%). After four cycles of successive fouling-cleaning processes, the water flux of the MD-10 membrane still exceeded 160 L·m −2 ·h −1 and was fourfold higher than that of neat PVDF. However, excessive amounts of the microemulsion could not be uniformly mixed with the PVDF membranes, thereby decreasing the permeation and antifouling performance of the PVDF hybrid membranes.
研究领域:
膜科学
·
纳米技术
·
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Zihao Dong,Yajuan Qu,Yuyang Jiao,Ke Xue,Wenguang Zhu,Hai Liu,Jianguang Qi,Yinglong Wang
A series of poly(1-vinyl-3-methylimidazole dimethyl phosphate- co -N-isopropylacrylamide) oligomers was synthesized by reversible addition-fragmentation chain transfer polymerization. The co-oligomers exhibited a pH-tunable lower critical solution temperature (LCST) phase transition in aqueous solutions. By changing the pH of the aqueous solution (HCI), the hydrogen bonding between the internal molecules of the co-oligomers and water molecules was weakened, which effectively reduced the cloud-point temperature. Poly(1-vinyl-3-methylimidazole dimethyl phosphate- co - N -isopropylacrylamide) oligomers exhibit an upper critical solution temperature (UCST) type of phase transition in an ester solution, which is associated with the formation and breaking of hydrogen bonds within the co-oligomers molecules. FT-IR analysis revealed the effect of temperature on hydrogen bonding between the functional groups. Energy decomposition, Electrostatic Potential (ESP), Atoms-in-Molecules (AIM), and Interaction region indicator (IRI) analyses demonstrated the presence of hydrogen bond donors N–H and imidazole ring C–H, and hydrogen bond acceptors C = O and P = O in the co-oligomers. The sites of hydrogen bonding between the co-oligomers and the solvent molecules as well as intermolecular forces were found to be the main factors contributing to the LCST/UCST-type phase transition.
研究领域:
高分子化学
·
物理化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiaowei Guo,Yang Yuan,Shanshan Li,Jingwen Wang,Zhengyu Bai,Lin Yang
Owing to the unique geometric and electronic structure, design and synthesis of electrocatalysts with well defined heterointerfaces are essential for clean energy technologies, for instance water-splitting and Zn-air batteries. Herein, a bifunctional electrocatalyst assembled by Co/MnO nanoparticles and nitrogen doping double-sphere carbon (denoted as Co/MnO@N-DSC), was fabricated via a solvothermal and pyrolysis strategy. The Co/MnO@N-DSC catalysts exhibit an enhanced bifunctional oxygen electrocatalytic performance for Oxygen reduction reaction (ORR) (E 1/2 , 0.84 V vs . RHE) and oxygen evolution reaction (OER) (E onset , 1.54 V vs . RHE). As an air cathode catalyst, the Co/MnO@N-DSC-based Zn-air battery can afford prime performance, over the commercial noble-metal-based Zn-air battery. Theoretical calculation results indicate that the synergism of Co (111)/MnO (200) heterointerfaces can enhance charge transfer and provide extra electrons for the reaction processes. This work provides a promising manoeuvre to uplift bifunctional catalytic activity by increasing the synergy from heterointerfaces of transition-metal/metal oxide in oxygen electrocatalysis .
研究领域:
能源材料
·
电催化
·
纳米材料
·
可再生能源技术
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Haiyang Zhang,Junchuan Wang,Ying Sun,Xueqin Zhang,Hong Yang,Baoping Lin
The exploration of an inexpensive, low-energy consumption and environmentally friendly preparation process to synthesize high capacitance performance MOF-based electrode materials is an important prerequisite for their commercialization. We propose a non-calcined strategy to synthesize nanowire microsphere shaped Co-BTC (CBNWM). Making MOF into one-dimensional nanowire structure can effectively increase its active sites and the ion transfer rate. After the MOF nanowires are entangle and reunite into microspheres, their mechanical property and chemical stability are improved. Therefore, compared with Co-BTC crystal (CBC), the electrochemical properties of CBNWM have been significantly improved. The specific capacity of CBNWM reaches 1020 F g −1 at 5 mV s −1 or 657 F g −1 at 0.5 A g −1 with the capacity remains 81.4% after 3000 cycles. Subsequently, a flexible asymmetric device of CBNWM//AC was fabricated, whose maximum energy density can achieve 34.4 W h kg −1 with the related power density of 375.3 W kg −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）