MATERIALS LETTERS
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2021
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IF 3.423
Wenbo Liu,Jiabin Zhou,Dan Liu,Su Liu,Xianjie Liu
Accelerating electron transfer can improve the catalytic performance. MIL-88/Go composites were synthesized by hydrothermal method using the oxygen-containing functional group of graphene oxide (GO) as the MIL-88 unit cell nucleus. Fe 2 O 3 /rGO composites with small particle size were prepared by roasting of MIL-88/GO. It has high degradation efficiency (99%) and good recycling performance for tetracycline hydrochloride (TC-HCl) in photo-Fenton system. The combination of oxygen vacancies produced by roasting MIL-88 and the conductivity of reduced graphene oxide (rGO) improves the rate of electron transfer. The efficient electron transfer promotes the formation of OH and O 2 − and thus improve the catalytic activity.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2021
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IF 8.528
Jicheng Wang,Lixiang Song,Roy Ashish,Zhonglan Cui,Chenkai Zhu,Dongming Qi
Oriented structures with peculiar effects are widespread in nature but less common among artificial general materials. In order to develop composites with uniformly dispersed and oriented inorganic particles on large scale, Polyacrylate(PAcr)@rGO microspheres were fabricated by suspension polymerization and blended with Polymethyl Methacrylate (PMMA) to form PMMA/PAcr@rGO composites via in situ microfibrillation. The structure and mechanical properties (tensile strength, elongation at break and fracture energy) of the composites were investigated by transmission electron microscopy , scanning electron microscopy and universal material testing machine. As a result, the tenacity of composites was enhanced significantly with the dispersion phase of PAcr@rGO-0.15, where the elongation at break and the fracture energy were increased by ∼300% and ∼500% when compared to pure PMMA. During the melt blending process, PAcr@rGO microspheres were deformed into microfibrils through in situ microfibrillation, and the rGO was uniformly dispersed and oriented along the stretching direction as the microfibrils evolved. With the rGO fraction within 0.2 wt%, the highest degree of deformation for PAcr@rGO microfibrils was achieved with aspect ratio of ∼68 when 0.15 wt% rGO was added. As such, the movement of rGO particles was limited and aligned with the encapsulation and deformation of PAcr microspheres, which could be a good guidance to improve the dispersion of filler with alignment controlling for functional composites.
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高影响因子
CERAMICS INTERNATIONAL
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2021
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IF 4.527
Wenfei Liang,Linping Zhong,Lijun Quan,Xuejia Wang,Mengjiao Liu,Xin Lai,Jian Bi,Daojiang Gao,Xiaohong Liu,Wei Zhang,Yan Zhao
Transition metal oxides (TMOs) based compounds are recognized as high-energy anodes in next-generation lithium-ion batteries (LIBs) due to their extremely high theoretical capacity. However, the lower intrinsic conductivity , fast fading cyclic stability and dramatic volume expansion during discharge/charge processes greatly hinder the practical application of TMOs as anodes in LIBs. In this study, we have designed and constructed MoO 3 /ZnCo 2 O 4 QDs@C@rGO/MoO 3 (denoted as GMZCO) sandwich-structured hybrid nanocomposites via an effective route, and have proposed the formation mechanism of this unique nanostructured composite on the basis of the systematic results of the microstructures. Due to the unique sandwich structure and the synergistic enhancement effect of the ZnCo 2 O 4 QDs , α-MoO 3 and rGO, the as-constructed GMZCO exhibits the superior electrochemical performances when used as anode for LIBs. The obtained GMZCO can maintain high capacity of 1281 mAh g −1 at 0.2 A g −1 after 300 cycles, and can deliver as high as specific capacity of 913 mAh g −1 at 1 A g −1 after 500 cycles, revealing the higher capacity and excellent cyclic stability. What deserves to be mentioned most is that GMZCO can keep a capacity of 541 mAh g −1 after 1400 cycles even at higher current density of 3 A g −1 , having outstanding rate capability. This work paves a novel approach for design TMOs with unique microstructures as a promising anode for the high-performances LIBs.
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SURFACE & COATINGS TECHNOLOGY
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2021
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IF 4.158
Guibin Lou,Lida Shen,Yingjuan Qian,Ya Chen,Huawen Bai,Haixia Cheng,Junwei Xu,Youwen Yang
This work studies the antibacterial and anti-corrosion properties of nickel-graphene oxide (Ni-GO) composite coating and nickel-reduced graphene oxide (Ni-rGO) composite coating deposited by magnetic field assisted scanning jet electrodeposition on manganese steel . Agar plate assessment and cell live/dead staining were used to evaluate the antibacterial property of the two types of composite coatings. The Ni-GO and Ni-rGO composite coatings can effectively improve the antibacterial property of the substrate. The Ni-GO composite coating deposited with graphene oxide (GO) concentration of 0.5 g/L showed the most excellent antibacterial ability, and its antibacterial rate against E. coli and S. aureus within 2 h were 100% and 93%, respectively. Potentiodynamic polarization measurements indicated that the protective efficiency of the two types of composite coatings on the manganese steel reaches 99% after being immersed in 3.5 wt% NaCl solution for 7 days. The combined effect of barrier protection from GO-based materials (GO, rGO) and corrosion products effectively inhibits the corrosion behavior of the two types of composite coatings.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Teng Chen,Yunlong Geng,Hongri Wan,Yan Xu,Yingmei Zhou,Xiangjun Kong,Jiaomei Wang,Yunhui Qi,Bing Yao,Zhaojian Gao
In this paper, Fe 3 O 4 /Ag/RGO reusable ternary nanocomposites are explored via a facile one-pot solvothermal strategies, and the catalytic performance and antibacterial activity are investigated in detail. The catalytic performance of Fe 3 O 4 /Ag/RGO towards the reduction of 4-NP into 4-AP is evaluated, and the reaction rate constant ( k ) for Fe 3 O 4 /Ag/RGO is calculated to be 0.03086 s −1 , which is higher than that of Fe 3 O 4 /Ag (0.01756 s −1 ), indicating the catalytic activity is improved after decorating Fe 3 O 4 /Ag onto the graphene sheet. The antibacterial experiment shows Fe 3 O 4 /Ag/RGO ternary nanocomposites present a wide range of antibacterial activities against Gram-positive bacteria ( S. aureus and B. cereus ) and Gram-negative bacteria ( E. coli and P. aeruginosa ). The minimal inhibitory concentrations (MIC) for Fe 3 O 4 /Ag/RGO nanocomposites against four bacterial species are determined. Additionally, Fe 3 O 4 /Ag/RGO nanocomposites also present high reusability as catalyst and antibacterial agent. The results illustrated in this paper imply that the multifunctional performances such as efficient reduction of 4-NP followed by superior anti-reproduction of pathogenic bacteria make the Fe 3 O 4 /Ag/RGO ternary nanocomposites a promising catalyst for dye-polluted water and disinfectant agent for wastewater treatment and purification.
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APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Yue Yu,Lian Wu,Shuxi Gao,Kangle Jia,Wei Zeng,Bing Liao,Hao Pang
Through inserting SiO 2 @Au into the reduced graphene oxide (rGO) layers, the rGO-SiO 2 @Au composites were prepared via the vacuum-assisted electrostatic self-assembly method. The obtained composites exhibit excellent electromagnetic interference (EMI) shielding effectiveness due to the successful construction of multi-nanocavities (spherical SiO 2 cavities and layered air cavities between rGO), multi-reflection interfaces (rGO and Au shell) and continuous conductive network (rGO-Au-rGO). Among them, the total shielding effectiveness (SET) of the composites with 75.78 wt% SiO 2 and 19.38 wt% rGO can reach 38.4 dB at 18 GHz. Thereinto, the shielding effectiveness absorption (SEA) is 36.4 dB, 1.3 and 13.5 times higher than that of rGO and SiO 2 @Au. And the shielding effectiveness reflection (SER) is always below 5 dB from 1 to 18 GHz, much lower than that of rGO (about 15 dB). Further studies found that the SEA values were enhanced at 12.6 GHz and 6.2 GHz due to the construction of cavities and location of Au nanoparticles between the rGO layers. This study provides a simple and mild method to prepare high-performance thin-layered materials with applications in the field of EMI absorption shielding.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Yanyan Zhao,Xuhua Liang,Xiaoyun Hu,Jun Fan
Fabrication of binary composite has proved to be an efficient approach to improve the photocatalytic activity of monomer photocatalyst . In this contribution, an effective Reduced Graphene Oxide/Bismuth Tungsten Oxide (rGO/Bi 2 WO 6 ) composite with outstanding photocatalytic activity was designed by employing Bi 2 WO 6 as a primary photocatalyst and rGO as an electron acceptor and transporter for norfloxacin degradation in aquatic environment. The rGO/Bi 2 WO 6 composite displayed higher photocatalytic activity compare with pure Bi 2 WO 6 , which could degrade about 87.49% of norfloxacin with 180 min under visible light irradiation. The results of the UV–vis diffuse reflection spectrum, photoluminescence spectra and transient photocurrent response implied that the enhanced photocatalytic activity of the rGO/Bi 2 WO 6 composite could be attributed to the improved visible light-harvesting ability and the efficient charge separation ability. Additionally, the reactive-species-trapping experiments indicated that ⋅OH and e − played dominant roles during the photocatalytic degradation process. Four possible intermediates and two possible transformation pathways of norfloxacin degradation were detected by LC-MS. This present work provided a low-cost and facile green method to design of Bi-based composite.
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PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2020
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IF 1.701
Huili Zhang,Hailin Yu,Wen Yuan,Bo Yu,Ying Chen,Jinjun Deng,Danfeng He,Ye Zhang
Co2+ and F– are doped into lattice of TiO2 powders, and the effects on charge trapping, recombination, and interface transfer are systematically researched. Double doped TiO2 photocatalyst was introduced on Graphene oxide, to construct heterojunction for photocatalytic denitrification of fuel containing pyridine (PY), indole (IND), and quinoline (QUI). A significant improvement in the photocatalytic activity was detected with the double doped modified heterojunction photocatalyst as compared to the pure TiO2. The reason for the improvement of the photocatalytic denitrification performance of oil may be derived from that the doped metal ions and nonmetal ions capture charge carriers to provide an alternative pathway for interface charge transfer, decreased the band gap width and the energy required for the transition, and caused the red shift in the light response range. On the other hand, catalyst supported on RGO, not only accelerated the transfer of photogenic carriers, improved the life of catalytic active component, but also enhanced the dispersibility of catalyst in oil. The experimental results showed that the activity and reusability of the photocatalyst denitrification performance was found satisfactory. On this basis, it is indicated that Co2+/F–/TiO2-RGO can be prospective materials for catalytic denitrification of oil.
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Materials
·
2020
·Vol. 13
·期 20
·4527
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IF 3.057
Hui Liu,Ling Li,Xinxin Wang,Guangzhen Cui,Xuliang Lv
A novel CoS@Fe3O4@rGO aerogel with a unique 3D porous heterostructure was prepared via the solvothermal method, in which cobalt sulfide (CoS) microspheres embedded with Fe3O4nanoparticles were randomly scattered on reduced graphene oxide (rGO) flakes. The introduction of magnetic Fe3O4nanoparticles and rGO regulated the impedance matching, and the excellent electromagnetic wave (EMW) absorption capability of the CoS@Fe3O4@rGO aerogel could be attributed to optimal dielectric loss and abundant conductive networks. The results demonstrated that the minimum reflection loss (RL) value of CoS@Fe3O4@rGO aerogel was −60.65 dB at a 2.5 mm coating thickness with an ultra-wide bandwidth of 6.36 GHz (10.24–16.6 GHz), as the filler loading was only 6 wt%. Such a lightweight CoS@Fe3O4@rGO aerogel with an outstanding absorbing intensity and an ultra-wide effective absorption bandwidth could become a potential EMW absorber.Keywords:microwave absorption;rGO aerogel;CoS;porous structure
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高影响因子
ANALYTICAL BIOCHEMISTRY
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2020
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IF 2.877
Lijun Wang,Tianyu Liao,Hong Zhou,Yukun Huang,Pengfei Chen,Xiao Yang,Xianggui Chen
Development of a rapid and sensitive method for Salmonella spp. detection is of great importance for ensuring food product safety due to its low infective dose. In this study, a colorimetric method based on the peroxidase-like activity of Cu(II)-modified reduced graphene oxide nanoparticles (Cu 2+ -rGO NPs) and PCR was successfully developed to detect Salmonella spp. in milk. Under optimal conditions, the developed colorimetric method exhibited high sensitivity and strong specificity for Salmonella spp . detection. The limit of detection was 0.51 CFU/mL with a linear range from 1.93 × 10 1 to 1.93 × 10 5 CFU/mL. A specificity study demonstrated that this method can specifically distinguish Salmonella typhimurium and Salmonella enteritidis from other foodborne pathogens. The application of the proposed method for milk sample detection was also validated, and the recovery rates of S . typhimurium in spiked milk sample ranged from 102.84% to 112.25%. This colorimetric sensor exhibits enormous potential for highly sensitive detection of bacteria in milk sample.
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高影响因子
COMPOSITES COMMUNICATIONS
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2021
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IF 6.617
Lu Wu,Yunping Hu,Ping Tang,Hai Wang,Yuezhen Bin
Graphene and its derivatives are considered as one of the most promising functional materials due to their excellent mechanical and electrical properties. Here, we successfully prepared uniform and long-term stable reduced graphene oxide (rGO) dispersion using sodium carboxymethylcellulose (CMCNa) as a stabilizer creatively, and fabricated rGO/CMCNa/polyacrylic acid (PAA) conductive composite hydrogel. The optimal elongation at break of the cylindrical composite hydrogel (1 cm in diameter and 4 cm in length) could reach 1200% at a tensile rate of 50 mm/min. The swelling rate of the composite hydrogel in alkaline environment was much higher than that in acidic environment, indicating excellent pH sensitivity. More importantly, the conductivity of the composite hydrogel could be increased by about 2500% and reached 0.56 S/m due to the construction of the rGO conductive network. The strain sensor based on the rGO/CMCNa/PAA hydrogel showed a wide region of linear response to deformation, up to a strain of 300%. It also exhibited good performance in other aspects, including low hysteresis, a GF value of 1.0, a short response time of 187 ms, and satisfactory stability and repeatability of 2000 cycles at 50% strain. In particularly, the strain sensor could be well adhered to skin without any other adhesives as soft human-motion sensor for real-time and accurate detection of both large-scale and subtle human activities, indicating a great application potential in electronic skin and human health detection.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2020
·Vol. 413
·期 3
·813-820
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IF 3.637
Dou Nannan,Qu Jianying
In this work, a hybrid of multiwalled carbon nanotubes, nanogold, and reduced graphene (rGO/AuNPs/MWCNTs) was synthesized rapidly with an easy method, and then combined with chitosan (CS), which was fixed on a glassy carbon electrode (GCE) to construct a new kind of electrochemical sensor to simultaneously determine 4-aminophenol (4-AP) and acetaminophen (AC). When detecting 4-AP and AC simultaneously, the linear range is 0.12~12 μM for acetaminophen and 0.05~25 μM for 4-aminophenol; the detection limit is 42 nM for acetaminophen and 2.95 nM for 4-aminophenol. Compared with previously related reports, the proposed sensor has an excellent electrocatalytic performance for the redox of 4-AP and AC, which can effectively determine 4-AP and AC simultaneously in actual samples and has potential application prospect.
Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）