JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yi Wang,Xinyan Xiao,Mingli Lu,Yu Xiao
The transition-metal dichalcogenides (TMDs) is a promising photocatalyst for degrading contaminant, while limited active sites and poor carrier mobility are the primary challenges for improving photocatalytic degrading efficiencies in both bare TMDs and TMDs-based photocatalysts. A rGO-MoSe 2 composite with 3D network hierarchical structure was fabricated by the GO-assisted solvothermal method. And then rGO-MoSe 2 /g-C 3 N 4 3D/2D hierarchical structures were constructed by combining rGO-MoSe 2 with g-C 3 N 4 nanosheets . The optimal rGO-MoSe 2 /g-C 3 N 4 composite exhibited the highest photocatalytic degrading rate of 97.4% towards RhB under simulated solar light, and its pseudo-first-order apparent rate constant ( k ) was 0.0715 min −1 , being 5.9 and 12.5-folds higher than that of MoSe 2 /g-C 3 N 4 (0.0121 min −1 ) and bare g-C 3 N 4 (0.00573 min −1 ), respectively. The 3D/2D hierarchical structure endow rGO-MoSe 2 /g-C 3 N 4 composite with the improved light-harvesting and abundant active sites, supported by the DRS and BET analyses. And rGO nanosheets could act as efficient transfer and separation channels for electron-hole pairs between MoSe 2 and g-C 3 N 4 , confirmed through the photocurrent response and EIS tests. According to the results of DRS spectra and Mott-Schottky plots, the spatial behavior of photo-induced carriers at interface of rGO-MoSe 2 /g-C 3 N 4 would comply to a Z-scheme transfer pathway under the synergy effects of the internal electric field and band bending.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
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IF 3.8
Guoxin Ding,Chenfeng Sun,Meiyi Wang,Guojun Cheng,Jun Liu,Yuexiang Hu
The construction of multihollow lightweight wave absorbing materials is a future goal. Layered double hydroxides (LDHs) offer a great potential for electromagnetic wave absorption given their lamellar texture and tunable bimetallic composition. In this study, CoFe–LDH was grown on 4,4'-diaminodiphenylmethane-modified reduce graphene oxide (RGO) surfaces through a hydrothermal method, and composites with different morphologies and wave-absorbing properties were obtained at varying molar ratios of Fe to Co in CoFe–LDH. When Fe: Co=5:5, CoFe–LDH flakes grew uniformly on the RGO surface, and the composite exhibited an excellent microwave absorption performance with a minimum reflection loss of –60.0 dB and effective absorption bandwidth (EAB) of 4.4 GHz. When Fe: Co=3:7, the composite can obtain a maximum EAB of 5.12 GHz at a matched thickness of 1.82 mm.
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高影响因子
NEW CARBON MATERIALS
·
2021
·
IF 1.905
Shu-xia Yuan,Ming-hui Yang,Chun-xiang Lu,Xiao-min Wang
A GO/Ni(HCO 3 ) 2 composite was synthesized by the self-assembly of layered Ni(HCO 3 ) 2 and GO in their suspension mixture under sonication, followed by heat treatment to obtain rGO/NiO for the use as the electrode material of supercapacitors. The structural change from the GO/Ni(HCO 3 ) 2 to the rGO/NiO was investigated by XRD, SEM, and nitrogen adsorption. Results indicate that the rGO/NiOhas a specific surface area of 121.3 m 2 g -1 and pore volume of 0.26 cm 3 g -1 . The rGO/NiO possesses a hierarchical porous structure with a pore size range of 2-100 nm. The high specific surface area and the hierarchical porous structure endow the rGO/NiO composite with a high specific capacitance of 919 F g -1 (0.5 A g -1 ) and improved rate capability of 71% when the current density increases from 0.5A g -1 to 5A g -1 . The specific capacitance retains 91% of its original value after the composite is cycled at the current densityof 2 A g -1 for 3000 cycles, indicating a good rate capability.
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高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 151
·期 6
·1796-1804
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IF 2.482
Wang Haiyan,Zhang Yating,Yan Fangfang,Zhang Hucheng
Abstract The biorenewable alcohols are identified as the promising energy in fuel cells, but the lack of efficient catalysts limits the electricity output. Here, we chemically grew the PdAg alloy nanoparticles (NPs) on reduced graphene oxide (RGO) to obtain Pd x Ag y (m)/RGO, and investigated the dependences of peak current densities on the metal loadings (m), Pd mole fractions (x), and sizes. The maximal peak currents of 1.86, 4.88, 14.3 and 13.6 × 10 4 mA cm −2 mg Pd −1 were respectively achieved in the electrooxidation reactions of methanol, ethanol, ethylene glycol and glycerol. It is shown that the interactions of PdAg NPs with RGO can control the catalytic efficiencies through mediating the electronic characteristics of metal NPs and the reactant absorptions. Except the catalysts for methanol oxidation reaction, the efficient catalysis possesses the same lattice structure in PdAg alloys with the optimized m, and gives a common descriptor to select the catalyst with high catalytic activity. Graph Abstarct
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
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IF 4.495
Yehong Cheng,Yaxiong Liu,Yumin An,Ning Hu
Graphene derivative materials exhibit excellent mechanical and thermal properties, which have been extensively used to toughen ceramics and improve thermal shock resistance . To overcome the thermal agglomeration of graphene oxide (GO) during heating and drying process, ZrB 2 -SiC particles decorated GO hybrid foam with uniformly anchored ceramic particles was synthesized by electrostatic self-assembly and liquid nitrogen-assisted freeze-drying process. Densified rGO/ZrB 2 -SiC ceramics with varying microstructure, thermal physical and mechanical properties were obtained by adjusting the content of decorated ceramic particles. Although the flexural strength of rGO/ZrB 2 -SiC ceramics have an attenuation compared with that of ZrB 2 -SiC ceramic, the thermal conductivity , work of fracture and thermal shock resistance are greatly improved. rGO/ZrB 2 -SiC ceramics exhibit delayed fracture and increasing R-curve behavior during the crack propagation . The novel preparation technology allows for the well dispersion of rGO in ZrB 2 -SiC ceramics and can be easily extended to other ceramic or metal materials systems.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
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IF 6.182
Lin Gong,Xiaodong Li,Qi Zhang,Bing Huang,Qiang Yang,Guangcheng Yang,Yousong Liu
Transition metal quantum dots (QDs) are ideal electrocatalysts due to their short ion diffusion path, high atom utilization and effective electron transfer properties. However, a lack of facile and large-scale synthesis strategy limits their industrial production and commercial application. In this study, a triaminoguanidine salt-induced one-step deflagration method is first reported for the ultrafast (hundreds of milliseconds) and gram-scale synthesis of Co 3 O 4 QDs-C 3 N 4 /rGO as an efficient oxygen reduction reaction (ORR) catalyst with high durability. The deflagration reaction process is carefully studied and the formation mechanism is proposed to explain the controllable synthesis of Co 3 O 4 QDs. An optimized sample is capable of achieving an excellent ORR performance in terms of an onset potential of 0.97 V (vs. RHE, equivalent to Pt/C) and the limited current density of −5.33 mA·cm −2 at 0.35 V (vs. RHE, ~7% higher than that of Pt/C). It is believed that this simple and effective synthesis strategy will open up an exciting new avenue to the future design and facile synthesis of Co 3 O 4 or other QDs-based functional materials.
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 47
·29590-29597
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IF 3.361
Chuanen Guo,Chengxiang Wang,Hongyan Sun,Dongmei Dai,Hongtao Gao
High-performance electrode modification materials play a crucial role in improving the sensitivity of sensor detection in electrochemical determination of heavy metals. In this study, a rGO/MoS2/CS nanocomposite modified glassy carbon electrode (GCE) was used to construct a sensitive sensor for detecting lead ions in tobacco leaves. The reduced graphene oxide (rGO) was used to increase the conductivity of the sensor, and the nano-flowered MoS2 could provide a large reaction specific surface area and a certain active site for heavy metal reaction. Chitosan (CS) was used to improve the enrichment ability of heavy metals and increase the electrocatalytic activity of electrode. Thus, an electrochemical sensor with excellent performance in reproducibility, stability and anti-interference ability was established. The stripping behavior of Pb(II) and the application conditions of the sensor were studied by square wave anodic stripping voltammetry (SWASV). The investigation indicated that the sensor exhibited high detection sensitivity in the range of 0.005–0.05–2.0 μM, and the limit of detection (LOD) was 0.0016 μM. This work can provide a fast and effective method for determination of Pb(II) in samples with low content, such as tobacco leaves.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
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IF 8.067
Zhuoran Hou,Di Yang,Yuntao Xin,Haoyu Huang,Xin Hu,Yuyang Guo,Siduo Wu,Liwen Hu
In order to solve the crisis of energy depletion and protect the beautiful natural environment, the development of efficient, cost-effective and stable hydrogen evolution reaction (HER) electrocatalyst has attracted great attention, but it is still an urgent challenge to fabricate an abundant and low cost electrocatalyst. In this article, a novel HER catalyst with heterogeneous structure interfaces was in situ synthesized by multi-step electrodeposition method, and the mechanism of the enhancement of its electrocatalytic activity was elucidated by the combination of density functional theory (DFT) calculation and multi-characterizations. The initial overpotential is only 83 mV and the Tafel slope is only 58.5 mV/dec, which is better than most of other reported CoP-based electrocatalyst. At the meantime, DFT calculations show that the incorporation of MoO 3 and rGO leads to electron redistribution among different components, which ensures efficient adsorption and activation of H 2 O molecules and hydrogen atoms. Therefore, this work will contribute to the understanding of the mechanisms associated with heterojunctions and provide guidance for the rational design of a hybrid catalyst.
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高影响因子
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-11
·
IF 4.38
Abolhasan Rozita,Khalilzadeh Balal,Yousefi Hadi,Samemaleki Sahar,Chakari-Khiavi Forough,Ghorbani Farzaneh,Pourakbari Ramin,Kamrani Amin,Khataee Alireza,Rad Tannaz Sadeghi,Rashidi Mohammad Reza,Yousefi Mehdi,AghebatiMaleki Leili
In the present article, we developed a highly sensitive label-free electrochemical immunosensor based on NiFe-layered double hydroxides (LDH)/reduced graphene oxide (rGO)/gold nanoparticles modified glassy carbon electrode for the determination of receptor tyrosine kinase-like orphan receptor (ROR)-1. In this electrochemical immunoassay platform, NiFe-LDH/rGO was used due to great electron mobility, high specific surface area and flexible structures, while Au nanoparticles were prepared and coated on the modified electrodes to improve the detection sensitivity and ROR1 antibody immobilizing (ROR1Ab). The modification procedure was approved by using cyclic voltammetry and differential pulse voltammetry based on the response of peak current to the step by step modifications. Under optimum conditions, the experimental results showed that the immunosensor revealed a sensitive response to ROR1 in the range of 0.01–1 pg mL −1 , and with a lower limit of quantification of 10 attogram/mL (10 ag mL −1 ). Furthermore, the designed immunosensor was applied for the analysis of ROR1 in several serum samples of chronic lymphocytic leukemia suffering patients with acceptable results, and it also exhibited good selectivity, reproducibility and stability.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Bin Qu,Ye Tao,Lan Yang,Yihui Liu
Transition metal phosphide based orange-like Pd@Co@P nanoparticles supported on reduced graphene oxide (Pd@Co@P/rGO) have been synthesized by a one-pot co-reduction at room temperature using methylamine borane (MeAB) as the reducing agent. The prepared Pd@Co@P/rGO nanoparticles were characterized by powder X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), selected area electron diffraction (SAED) and confocal Raman microscopy (Raman). Compared with Pd/rGO and Pd@Co/rGO, the Pd@Co@P/rGO catalyst has higher catalytic activity for the hydrolytic production of ammonia borane (AB) with the turnover frequency value (TOF) of 127.57 min −1 and the activation energy of 39.05 kJ mol −1 . This excellent catalytic performance may be caused by the orange-like structure and good dispersion of Pd@Co@P/rGO nanoparticles, and the synergistic electron interactions between palladium , cobalt, and phosphorus.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Gang Yi,Xinfei Fan,Xie Quan,Haiguang Zhang,Shuo Chen,Hongtao Yu
Nanofiltration offers an effective solution in wastewater treatment by size sieving and particularly electrostatic interaction (Donnan effect). However, its separation performance fluctuates with pH changes because both membrane charge and contaminate ionization are sensitive to pH. Therefore, it is significant to fabricate a nanofiltration membrane with steady separation efficiency over a wide pH range. In this study, a novel pH-responsive reduced graphene oxide membrane intercalated by polyacrylic acid-grafted-carbon nanotube (RGO-gCNT membrane) was designed elaborately. Benefited from the pH-responsive property of polyacrylic acid, the pore size of RGO-gCNT membrane can be narrowed in acid solution and enlarged in basic solution. And the pore sizes at pH 3.0 and pH 8.2 are calculated to be about 0.8 and 1.3 nm, respectively. The results of pH influence on phosphate separation show that phosphate rejection rate of the non-responsive RGO-CNT membrane decreases sharply from 91.6% to 11.1% when the pH changes from 8.2 to 3.0. However, the pH-responsive RGO-gCNT membrane can retain 92.7% and 74.2% of the feed phosphates at pH 8.2 and 3.0, respectively. This novel pH-responsive RGO-gCNT membrane provides reliable separation efficiency over a wide pH range and gives new insight to design smart membranes.
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高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2019
·Vol. 31
·期 2
·337-346
·
IF 2.125
Zhao Chenyu,Jiao Junfeng,Zhou Wencui,Zhang Yong,Liu Han,Yang Xiaogang,Pandi Boomi,Cai Yurong
In this study, a new HAP/rGO/AuNPs-AO modified carbon electrode (GCE) was fabricated for amperometric detection of ascorbic acid. The HAP/rGO/AuNPs composite was prepared by one-step hydrothermal method. The large specific surface area, strong adsorption and excellent biocompatibility of HAP nanowires enabled fast, stable and accurate detection of ascorbic acid. As array of quantum dot, AuNPs had strong electrocatalytic activity in addition to good adsorption to enzymes, which could provide high sensitivity and low limit of detection for biosensor. Then rGO ensured that current signal could be quickly transferred from the composite to electrode. Under the optimum conditions, the prepared biosensor demonstrated a wide linear range from 0.39 to 36 mM (R 2 = 0.99845), a low limit of detection (3.39 μM, S/N = 3) and a high sensitivity (15.949 mA moL −1 ) with good selectivity, stability (10.8%) and repeatability (3.9%), which might providing a reasonable and reliable way for ascorbic acid detection.
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