MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Mao Shen,Wei Li,Fengzao Chen,Lei Chen,Yuxiang Chen,Suqing Chen,Shibin Ren,Deman Han
Bisphenol A (BPA) is a potential endocrine-disrupting compound with adverse effects on both human health and the environment. Therefore, it is urgent to develop a convenient, sensitive and accurate method for BPA detection. In this paper, a ratiometric electrochemical sensor for BPA detection was developed using Ag@Fe 3 O 4 -rGO composite modified glassy carbon electrode (GCE), with the peak oxidation current of silver nanoparticles (NPs) in the material as the reference signal and the peak oxidation current of BPA as the indicator signal. The Ag@Fe 3 O 4 -rGO composite was prepared by a simple one-step solvothermal method. Due to the chemical functionality and two-dimensional structure, the rGO combined with Ag@Fe 3 O 4 core–shell NPs provides an excellent platform for BPA detection. The morphology, structure and electrochemical performance of Ag@Fe 3 O 4 -rGO composite were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and electrochemical techniques. The proposed ratiometric electrochemical BPA sensor shows the linear detection range of 0.1–10.0 µM (R 2 = 0.997), with detection limit of 0.028 μM (S/N = 3), good selectivity, reproducibility and stability. In addition, this proposed ratiometric electrochemical sensor was successfully verified in the detection of BPA in real water samples.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Xiangyu Peng,Jiayi Tian,Shuai Zhang,Wei Xiao,Xiaozhen Tian,Yubin Wang,Juanqin Xue,Dashi Lei
Rational design of photoelectrode with high visible light utilization rate and separation efficiency of electron-hole pairs is the key step in photoelectrocatalytic technology. In this work, Z-Scheme photoelectrocatalyst (ZTO/rGO/Ag/AgBr) was synthesized by hydrothermal and photo-reduction process. Comparing with pure Zn 2 SnO 4 (ZTO), adding reduced graphene oxide (rGO) effectively improved electrons transfer efficiency. Notably, the addition of Ag/AgBr not only broaden the visible light response range of ZTO, but also accelerated the separation of photo-generated electron-hole pairs, and constructed all-solid-state Z-Scheme heterojunction . Meanwhile, DFT calculation showed that Ag metal on rGO surface could act as active site for organic dyes degradation . Moreover, the addition of extra bias potential during photoelectrochemical process not only accelerate the migration of carriers, but also inhibit the recombination of photo-generated electron-hole pairs. Methylene blue (MB) could be effectively removed during photoelectrochemical reaction process, which was attributed to hydroxyl radical (•OH) and superoxide radical (•O 2 - ). In this work, Z-Scheme transfer pathway, assisted photoelectrocatalytic technology, is a feasible strategy for improving catalytic performance.
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APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Jun Cai,Yibing Xie,Chong Ma,Xueqian Wang,Langlang Wang,Ping Ning,Yixing Ma
Photocatalytic oxidation of gaseous heavy metals is an efficient approach to alleviate energy crises and environmental pollution. In this study, a novel two-step solvothermal method was designed to synthesize reduced graphene oxide (rGO)-modified bismuth oxyhalide (BiOX, X = Cl, I, Br) nanosheets. The modification of rGO led to the significant enhancement in the specific surface area of BiOX nanosheets, reduction in the bandgap, improvements in the light absorption range and intensity, acceleration in the photogenerated carrier separation rate, and reduction in the photogenerated electron − hole complexation. Furthermore, both O 2 – and OH were demonstrated to be active species in the reaction. Owing to these achievements, all samples displayed significantly improved photocatalytic performance. Furthermore, the rGO-modified samples exhibited excellent stability and maintained the highest mercury removal efficiency after several cycles. However, the samples prepared in this research displayed a high level of moisture resistance. These characteristics of BiOX-based materials make them potential candidates for the photocatalytic removal of heavy metals from industrial waste gases.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Ruobing Zhao,Zhuangzhuang Liu,Zhihao Zhang
In this work, copper/reduced graphene oxide (Cu/RGO) mixed powders were produced by using hydrogen-reduction (H 2 reduction) with graphene oxide (GO) and copper oxide powders as raw materials. The Cu/RGO composite was sintered through spark plasma sintering (SPS). The effects of RGO content and sintering conditions on the relative density, hardness and electrical conductivity of the composite were investigated. The results show that the GO and copper oxide powder can be reduced via H 2 reduction when sintered at 500 °C for 8 h. Moreover, as the content of RGO increases from 0 wt% to 0.67 wt%, the hardness and electrical conductivity increases firstly and then decrease. When the content of RGO is 0.33 wt%, the hardness and electrical conductivity of the composite reach the maximum, i.e., 98.6 HV and 80.5% IACS (International Annealed Copper Standard) respectively. The hardness and electrical conductivity are maximum for the composite sintered at 600 °C for 8 h. Further increase in sintering temperature lowers the properties of the composite. The Cu/RGO composites sintered at 600 °C achieved a relative density of 95.56%, with the high hardness of 193.9 HV and electrical conductivity of 89.8% IACS.
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ENVIRONMENTAL RESEARCH
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2022
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IF 8.431
Xinyu Li,Hui Zhang,Xuedong Du,Shuaijie Wang,Qingrui Zhang,Houfen Li,Fei Ye
Constructing heterostructures has been a simple yet effective strategy for improving the photocatalytic performance of individual semiconductor photocatalysts. However, the poor quality of the contacted interface coupled with the narrow and overlapping light absorption scope between heterocomponents limits potential improvement. Herein, a 2D/2D rGO-Bi 2 WO 6 heterostructure with face-to-face compact contact interface and UV to NIR light absorption ability was synthesized to overcome the aforementioned limitations. The as-prepared 2 wt%-rGO-Bi 2 WO 6 with a high contact interface quality exhibits the highest kinetic rate of (5.53 ± 0.75) × 10 −2 L mg −1 min −1 toward tetracycline (TC) degradation, which is 2.4 times higher than that of pristine Bi 2 WO 6 and 2.1 times higher than that of the 2 wt%-rGO-Bi 2 WO 6 composite with a poor interface quality. Moreover, approximately 30% of TC can be mineralized with a 2 wt%-rGO-Bi 2 WO 6 presented system after 120 min. The subsequent Escherichia coli culture and liquid chromatography–mass spectrometry were employed to detect the biotoxicity variation of degradation intermediates and the possible transformation pathways of TC, respectively. Finally, the reactive species trapping results indicate that photogenerated holes and superoxide radical anions play dominant roles during the TC degradation process. This work provides a facile and effective method to fabricate an efficient heterojunction photocatalyst for pollutant degradation .
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Yuting Zhong,Zhirui Wu,Xiaoguang Liu,Ling Li
Establishing strong interfacial interactions through novel support materials and poly-metallic alloys is an effective method to boost the catalytic performance for electrocatalytic alcohols oxidation . Herein, PdBiMn particles embedded pleated layered rGO-modified novel prismatic Al-based metal-organic framework (Al 2 (OH) 2 (H 2 O) 2 [C 10 O 8 H 2 ] or MIL-118A) composites were fabricated via a simple hydrothermal-impregnation reduction approach and employed in ethylene glycol oxidation reaction (EGOR). It is noticed that the strong electronic effects of PdBiMn alloys and the strong adsorption of oxygened species could alter the electronic structure of Pd and facilitate the removal of toxic species, while the rGO/MIL-118A strongly fixes abundant PdBiMn alloys, providing more active sites and accelerating the interfacial electron transfer . Impressively, the forward peak current density of trimetallic PdBiMn@rGO/MIL-118A catalyst is 239.62 mA cm −2 , it is almost 8.86 times greater than that of Pd/C. Additionally, after 3600 s chronoamperometry test, the current density of trimetallic catalyst retains about 75.54% of the initial current density.
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COMPOSITES SCIENCE AND TECHNOLOGY
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2022
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IF 9.879
Yanan Wang,Junying Suo,Haoyu Wang,Dongye Wang,Li Wei,Hong Zhu
Rubber reinforcement technology is developing towards the direction of high efficiency and multi-functionality, and the reinforcement of rubber by a single-component filler can no longer meet the requirements. Nanocomposite fillers have become the development trend of high-performance reinforcing fillers due to the complementary advantages and synergistic reinforcing effects of each component. Reduced graphene oxide-carbon nanotubes (RGO-CNTs) composites were prepared by a method of electrostatic assembly. The non-covalent modified RGO-CNTs was used as a substance to grow in situ SiO 2 nanoparticles (RGO-CNTs-SiO 2 ), and the RGO-CNTs-SiO 2 three-phase fillers were obtained. The RGO-CNTs-SiO 2 three-phase fillers were further used to study the reinforcing properties of hydrogenated nitrile rubber (HNBR). Furthermore, the effects of RGO-CNTs-SiO 2 with different component contents on the reinforcing properties of HNBR were systematically studied. The TEM images of RGO-CNTs-SiO 2 show that the RGO and CNTs promotes mutual dispersion, and the SiO 2 nanoparticles (average diameter 7 nm) are highly dispersed on the surface of RGO-CNTs. The characterization of RGO-CNTs-SiO 2 /HNBR indicates that the RGO-CNTs-SiO 2 efficiently weaken the filler network and improve the filler-rubber interaction. The results show that the three-phase fillers produce obvious synergistic reinforcing effects. The highest tensile strength (30.1 MPa) of RGO-CNTs-SiO 2 /HNBR is achieved at the RGO:CNTs mass ratio of 1:5, the RGO-CNTs mass percentage of 2%, and the filler loading of 50 phr. This work demonstrates the considerable promise for developing three-phase filler-based rubber composites .
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2021
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IF 6.158
Longjie Liu,Qingping Wang,Jiajiang Lin,Gary Owens,Zuliang Chen
Recently, estrogen has attracted widespread concern because it is increasing being detected in wastewater treatment plants. While techniques for estrogen removal have been reported, these have mostly focused on exploring the effect on removal using simple single-factor experiments, rather than applying more complex multifactor mathematical models to wastewater treatment. In this study, reduced graphene oxide-based iron nanoparticles (rGO@Fe NPs) were used for 17α-estradiol (αE 2 ) removal based on adsorption and Fenton oxidation . A response surface methodology , based on a Box-Behnken design, was used to determine the relationships between critical operation factors (pH, temperature, αE 2 concentration, rGO@Fe NPs dose and H 2 O 2 concentration) and removal efficiency to establish the optimal conditions for 1 mg L −1 αE 2 removal. Under the determined optimal reaction condition of pH 6.0, temperature 40 °C, 0.08 g L −1 rGO@Fe NPs dose and 6 mM H 2 O 2 , a maximum removal efficiency of 99.9% was obtained. Subsequently, the presence of co-existing anions (Cl − , SO 4 2− and NO 3 − ) significantly decreased the removal efficiency of αE 2 . However, αE 2 removal from domestic wastewater could be increased by 38.0% when applying RSM results. Moreover, αE 2 removal by rGO@Fe NPs remained stable over five reuse cycles indicating that rGO@Fe NPs would be an efficient and practical advanced materials for αE 2 removal.
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ACS Applied Materials & Interfaces
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2021
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IF 9.229
Xinyue Zhao,Mingwu Luo,Kunyao Peng,Zhibo Zhang,Bin Cheng,Bingbing Wang,Changbao Zhu,Xingbin Yan,Kaiyuan Shi
The dramatic growth of the sodium-ion battery market evokes a high demand for high-performance cathodes. In this work, a nanosized amorphous FePO4@rGO composite is developed using coprecipitation combined with low-temperature hydrothermal synthesis, which registered a surface area of 179.43 m2 g–1. The composites maintain three-dimensional mesoporous morphology with a pore size in the range of 3–4 nm. Uniform distribution of amorphous FePO4 allows a reversible capacity of 175.4 mA h g–1 at 50 mA g–1 while maintaining a stable cycle life of 500 cycles at 200 mA g–1. The amorphous FePO4@rGO, obtained by energy-efficient synthesis, significantly improved the rate performance compared to the crystalline material prepared at high temperatures. Cyclic voltammetry tests reveal that the fast reaction kinetics can be attributed to the pseudocapacitive behavior of the electrode. In addition, we demonstrated the promise of FePO4@rGO cathodes for low-temperature sodium-ion batteries.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2021
·Vol. 25
·期 6
·1825-1834
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IF 2.647
Zhang Kai,Jiang PingPing,Nie Zhixin,Gu Qian,Zhang Pingbo
The development of transition metal-based catalysts for hydrogen evolution reaction with high active and stable performance is becoming an important means to reduce the energy consumption and cost of hydrogen products. In this paper, a two-step adding hydrothermal approach is conducted to manufacture 3D flower-like heteronanostructures composed of MoSe 2 -rGO-CNTs for the efficient electrocatalysis for hydrogen evolution reaction (HER) by acid medium hydrolysis. The physical structures and chemical compositions of the heteronanostructures were characterized with several techniques such as scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The heterostructures of the flower-like MoSe 2 -rGO-CNTs are formulated by in situ combination of the monolayer rGO-CNTs and MoSe 2 crystals, where the excellent quality transverse heterostructures can boost the electrons transferring from the monolayer rGO-CNTs interfaces to the MoSe 2 crystals, accomplishing the electronic deployment of MoSe 2 -rGO-CNTs heterostructures for prominent electrocatalytic performance. After optimization, the as-synthesized MoSe 2 -rGO-CNTs heterostructures catalyst exhibited an excellent electrocatalytic activity in 0.5 M H 2 SO 4 solution with an overpotential of 206 mV at the current density of 10 mA·cm −2 and a Tafel slope of 46.74 mV·dec −1 for HER reaction. The optimal MoSe 2 -rGO-CNTs heteronanostructures display an excellent HER electrocatalytic activity and superior long-term durability in an acidic medium. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 21
·18590-18604
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IF 2.22
Zong Hanwen,Yang Haibo,Dong Jingjing,Ma Liang,Lin Ying,Qiu Yun,Wen Bo
Nowadays, designing and fabricating electromagnetic (EM) wave absorbers with lightweight and strong reflection loss (RL) is still urgent. Herein, rGO/CoFe 2 O 4 composite combined with magnetic CoFe 2 O 4 nanorods and reduced graphene oxide (rGO) was fabricated via molten salt method in combination with a simple etching route. The EM absorption ability of rGO/CoFe 2 O 4 nanorods composite can be regulated by changing the rGO addition amount. Particularly, the absorber for rGO/CoFe 2 O 4 nanorods composite with the rGO addition amount of 70 mg (S-70) displays favorable EM wave absorption properties. The optimal RL value is − 56.3 dB at the frequency of 16.9 GHz, when the corresponding thickness is 1.4 mm. The effective absorption bandwidth (EAB, RL < − 10 dB) is 4.3 GHz, when the thickness is 1.6 mm. Consequently, the rGO/CoFe 2 O 4 nanorods composite is a potential candidate for microwave absorbing materials.
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MATERIALS CHEMISTRY AND PHYSICS
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2021
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IF 4.094
Luyan Shen,He Chen,Chunhong Qi,Qiang Fu,Zhiyuan Xiong,Youyi Sun,Yaqing Liu
A facile process was developed to fabricate rGO/fluoroethylene vinyl ether (FEVE) nanocomposite coating for anti-corrosion application. Dry rGO modified with PS sphere were prepared with good re-dispersibility and directly added into FEVE organic paint, forming a rGO/FEVE nanocomposite coating. Furthermore, the effect of modified rGO on structure and properties of composite coating was investigated in detail. It was found that the composite coating (1.5 wt%) displayed best mechanical properties (e.g. adhesion strength of 14 MPa) and anti-corrosive performance (e.g. corrosive current density of 7.6 × 10 −12 A/cm 2 ) comparing with other composite coating based on rGO. This work thus provides a facile and environmentally friendly method to prepare novel nanocomposite coatings with enhanced performance for various practical applications.
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