CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Hongqiang Shen,Jixiang Wang,Jinhui Jiang,Bifu Luo,Baodong Mao,Weidong Shi
A series of RGO-Cu 2 O/Bi 2 O 3 composite photocatalysts was developed by depositing Cu 2 O and Bi 2 O 3 nanocrystals on the surface of RGO via an in situ precipitation method. The Cu 2 O and Bi 2 O 3 nanocrystals distributed uniformly and separately on RGO, which favored the transfer of photogenerated electrons and holes towards an effective path. Compared with RGO-Cu 2 O and RGO-Bi 2 O 3 , the three-component RGO-Cu 2 O/Bi 2 O 3 composites presented a further improvement on the photodegradation of tetracycline (TC) under visible light irradiation, which can be attributed to the construction of a Z-scheme photocatalytic system where the RGO served as a solid-state medium for the transfer of the photogenerated electrons from the conduction band of Bi 2 O 3 to the valence band of Cu 2 O.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 12
·9081-9090
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IF 2.019
Wang Zhen,Ru Qiang,Mo Yudi,Guo Lingyun,Chen Xiaoqiu,Hou Xianhua,Hu Shejun
In this work, we develop an effective strategy to synthesize porous peanut-like ZnCo 2 O 4 (ZCO) decorated with graphene/Carbon nanotubes (CNTs) as an effective anode material for long cycling life lithium storage via a facile solvothermal process and rapid cold-quenching method. SEM and TEM characterizations show that graphene and CNTs serving as the elastic support and superior conductive network wrap the porous peanut-like ZCO, which can enhance electrochemical performance. The as-prepared ZnCo 2 O 4 /reduce graphene oxide/carbon nanotubes (ZCO/rGO/CNTs) delivers an initial discharge capacity of 1214.1 mAh g −1 at a current density of 500 mA g −1 and exhibits a high discharge capacity (1026.6 mAh g −1 after 200 cycles) when evaluated as anode materials of LIBs. More interestingly, the reversible capacity of the ZCO/rGO/CNTs even retains 728.6 mAh g −1 after 300 cycles even at a high current density of 1000 mA g −1 . The good cycling capability, high rate performance and reliable electrode adaptability suggest that the ZCO/rGO/CNTs will be an attractive material for lithium ion batteries.
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SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Xike Tian,Xiang Wang,Chu Dai,Yong Li,Chao Yang,Zhaoxin Zhou,Yanxin Wang
Glucose concentration in human body is a significant indicative for diabetes screening, so it is very significant to develop rapid and sensitive methods for glucose detection. Herein, CoSe 2 /reduced graphene oxide (CoSe 2 /rGO) nanohybrids were synthesized via a simple and convenient hydrothermal method, and also their morphologies and compositions were systematically characterized. The CoSe 2 /rGO nanohybrids were found to possess an intrinsic peroxidase-like activity and can effectively catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) accompanied with a blue color change. The catalytic activity of CoSe 2 /rGO nanohybrids is matched with the typical Michaelis–Menten kinetics and highly dependent on reaction time, pH, incubation temperature, and H 2 O 2 concentration. The peroxidase-like CoSe 2 /rGO nanohybrids were successfully applied for the detection of H 2 O 2 and glucose with the detection limit as low as 0.23 μM and 0.553 μM, respectively. Furthermore, some other carbohydrates, such as lactose, sucrose, galactose and fructose have no interferences with the detection of glucose. The detection platforms for glucose developed in the present work not only confirmed that the CoSe 2 /rGO nanohybrids possess intrinsic peroxidase-like activity but also showed great potential applications in varieties of simple, robust, and easy-to-make analytical approaches in the future.
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2016
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IF 2.463
Dong Yang,Jingjing Zhao,Xueyan Wang,Jiafu Shi,Shaohua Zhang,Zhongyi Jiang
In this study, we present a green and facile method of utilizing biomimetic silicification to trigger enzyme immobilization on the surface of the rGO/FeOOH hydrogel for constructing stable monolithic biocatalytic systems. In brief, the rGO/FeOOH hydrogel is firstly prepared through metal ion-induced reduction/assembly of graphene oxide (GO) nanosheets, which is then utilized to adsorb cationic polyethyleneimine (PEI). This cationic PEI, as the mineralization-inducing agent, catalyzes the condensation of silicate to form silica (biomimetic silicification) on the rGO surface, where enzyme is simultaneously entrapped. The resultant rGO/FeOOH/silica hydrogel shows an extraordinary three-dimensional (3D) porous structure. The silica content on the rGO surface can be facilely tailored through changing the silica precursor concentration. Combined with monolithic macroscale of the rGO/FeOOH/silica hydrogel, the acquired monolithic biocatalytic systems display easy recyclability and elevated pH/thermal/recycling/storage stabilities during the catalytic production of 6-aminopenicillanic acid (6-APA) in comparison to enzyme in free form and enzyme adsorbed on rGO/FeOOH hydrogel. Notably, the activity can be retained up to 93.3% of its initial activity after 11 reaction cycles for our biocatalytic systems.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Huaiyu Dong,Shuailong Gao,Chen Yu,Zhichen Wang,Haofeng Zhang,Yixing Huang,Tian Zhao,Ying Li
Traditional microwave absorbing materials struggle to balance wideband absorption with mechanical properties, particularly in multifunctional applications. This study explores the effects of short carbon fibers (CF), cerium dioxide (CeO 2 ), and reduced graphene oxide (rGO) on the electromagnetic and mechanical properties of 3D-printed composites. The ABS@CF/CeO 2 /rGO composite with a thickness of 2.2 mm exhibited exceptional microwave absorption, achieving an effective absorption bandwidth (EAB) of 6.6 GHz and a minimum reflection loss (RL min ) of −40.9 dB. The Whale Optimization Algorithm (WOA) was employed to design a load-bearing, microwave-absorbing superstructure, which significantly improved wideband absorption. Experimental results confirmed the superstructure’s isotropy and wide-angle absorption capabilities. The calculated electromagnetic parameters were applied to evaluate the radar cross-section (RCS) of large targets, demonstrating enhanced stealth performance for unmanned aerial vehicles (UAVs). Mechanical tests revealed that rGO improved interlayer bonding strength, while CF negatively impacted bending performance. The superstructure also showed excellent mechanical stability in load-bearing tests, underscoring its potential for practical engineering applications. This study offers insights into designing advanced composite materials with balanced electromagnetic and mechanical properties, guiding future multifunctional material development.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yifan Tong,Minghao Fang,Chaoqi Liu,Xin Min
As technology continues to advance, multifunctional flexible electronic devices for monitoring human health and managing thermal conditions have garnered considerable attention. Nevertheless, achieving a balance between a wide strain sensing range and high sensitivity remains a considerable challenge. Herein, PDA/PEBA/MWCNTs/rGO (PPMr) sensors were fabricated by vacuum-assisted filtration of ultrasonically mixed multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) loaded on polydopamine-modified PEBA nanofiber membranes. This sensor has a broad range of strain detection capabilities (0–127 % strain), high sensitivity (GF = 42), response/recovery times of 600/500 ms, and over 8000 cycles of stability. At the same time, this sensor also exhibits outstanding photothermal conversion capability (reaching 75.6 °C at 100 mW/cm 2 ), electrothermal conversion capability (up to 82.2 °C at 8 V), and excellent photothermal/electrothermal synergistic conversion capability (reaching 78.9 °C at 100 mW/cm 2 and 4 V). This strain sensor is noteworthy for its outstanding performance, as it can detect body movements across a wide range of strain, such as elbow joint movements, as well as subtle physiological signals like pulse waves. This capability highlights its significant potential for applications in human health monitoring and thermal management.
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高影响因子
FUEL
·
2024
·
IF 6.7
Nimra Muzaffar,Imad Barsoum,Amir Muhammad Afzal,Muhammad Waqas Iqbal,Zubair Ahmad,Areej S. Alqarni,Shams A.M. Issa,H.M.H. Zakaly
Monosodium glutamate (MSG), a sodium salt that comes from a non-essential amino acid, is generally employed as a flavor accompaniment in numerous diet recipes. Metal oxides containing oxygen vacancies present a potential opportunity for utilization as charge storage materials in supercapattery applications. This work illustrates the fabrication of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite via a combination of hydrothermal and modified Hummer methods. The structure of the fabricated MoLa 2 O 4 @Co-MOF@rGO nanocomposite was assessed by utilizing scanning electron microscopy (SEM), whereas the structural analysis was conducted via X-ray diffraction (XRD). The superior electrochemical parameters of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite over pure MoLa 2 O 4 and MoLa 2 O 4 @Co-MOF were ascribed to the combined effect of MoLa 2 O 4 , Co-MOF, and rGO. The specific capacitance (Cs) of 310.1 Fg −1 was achieved for MoLa 2 O 4 and 626.8 Fg −1 for MoLa 2 O 4 @Co-MOF. Among all samples, the MoLa 2 O 4 @Co-MOF@rGO electrode demonstrates an extraordinary Cs of 1716 Fg −1 at 3 mVs −1 . The energy storage mechanism is explained using the using Randles–Ševčík and Dunn’s models. The MoLa 2 O 4 @Co-MOF@rGO//activated carbon (AC) asymmetric supercapacitor configuration demonstrates the Cs of 1470 Fg −1 at 3 mVs −1 along with a particular energy of 58 Whkg −1 and a power density (P d ) of 2500 Wkg −1 . A MoLa 2 O 4 @Co-MOF@rGO nanocomposite-based amperometric immunosensor was designed to detect monosodium glutamate (MSG). A linear relationship was consistently detected between MSG concentration and the associated current change across the complete detection range of 0.05–200 μM. The multifunctional MoLa 2 O 4 @Co-MOF@rGO ternary nanocomposite electrode material opens up new prospects for designing hybrid devices in energy harvesting and food-related applications.
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ELECTROCHIMICA ACTA
·
2024
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IF 5.5
Xiaona Li,Weiyang Zhang,Zhengyan Gu,Qingbin Cai,Hongwei Kang,Baocheng Yang,Zhikun Li
Transition metal sulfides (TMSs) are a class of advanced electrode materials for new energy storage devices with superior performance due to their many advantages, such as high specific capacity, good conductivity, low electronegativity, high redox activity, rich variety and low price. Herein, we developed N-doped reduced graphene oxide (N-RGO) decorated CoS 2 nanoparticles nanohybrids (N-RGO/CoS 2 , denoted as NGCS) by a facile hydrothermal method. The doped-N process enriches the specific surface area and porosity of RGO nanosheets, which not only forms rich network nanostructures conducive to rapid charge/ion transport, but also promotes more dispersed anchoring of CoS 2 , resulting in the formation of smaller-sized CoS 2 nanoparticles that can provide rich and exposed electroactive sites. Therefore, such unique hierarchical porous nanostructures help all components in the nanohybrids to “complement each other's strengths”, so that the fabricated NGCS electrode exhibits a high specific capacitance of 797.1 F g −1 at 0.6 A g −1 and an excellent rate capability with 77.5 % retention (20 A g −1 ). Furthermore, the assembled NGCS//AC hybrid supercapacitor (HSC) delivers excellent energy density of 41.4 Wh kg −1 (at 719.7 W kg −1 ) and long-term cyclability with 86.02 % capacitance retention after 13,000 cycles, presenting a promising application potential in new high-performance energy storage and conversion devices.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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2024
·
IF 6.1
Tao Liu,Chang Jiang,Zekai Liu,Xuehui Zhang,Wenmin Zhao,Longfei Zeng,Lina Zhang
Reduced graphene oxide (rGO) with surface-loaded Cu particles (scCu-rGO) was prepared by supercritical CO 2 deposition, and Cu matrix composites with scCu-rGO as a reinforcement (scCu-rGO/Cu composites) were successfully prepared by ball milling for different times and spark plasma sintering (SPS). The scCu-rGO/Cu composites prepared with a ball milling time of 20 h exhibited high electrical conductivity (96.3 % IACS), tensile strength (240 MPa), and elongation (37 %). The outstanding properties are mainly ascribed to the uniform distribution of rGO by the ball milling process and rGO promoted by loading Cu particles onto its surface through supercritical deposition, which led to an interfacial reaction between rGO and Cu, resulting in the formation of a Cu 2 O transition layer with a load-transferring effect that enhanced the mechanical properties of the composites. Based on the experimental results, the strength of scCu-rGO/Cu composites is mainly enhanced by synergistic strengthening through grain refinement, Orowan looping and load transfer strengthening. This study demonstrates that the use of supercritical deposition to construct Cu 2 O transition layers can result in a strength-plasticity and high electrical conductivity match in scCu-rGO/Cu composites. The findings presented here offer new insights for innovative design of Cu matrix composites for advanced engineering applications by using supercritical deposition.
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DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 46
·18688-18697
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IF 3.5
Xiaolong Lu,Yan Zhou,Cancan Li,Qi Wang,Bijun Fang,Yi Shi,Ningyi Yuan,Jianning Ding
Two-dimensional (2D) transition-metal carbide Ti3C2TX (MXene) possesses good electrical conductivity, high specific surface areas and metal oxide-like surfaces, which make it ideal for application in supercapacitors with both high energy density and power density. However, similar to other 2D materials, the issue of self-stacking leads to narrower ion-transport channels, along with a drastic reduction in active sites, thus severely limiting the performance of MXene-based electrodes. To address this problem, this work proposes to introduce one-dimensional (1D) reduced graphene oxide (rGO) nanoribbons as spacers between MXene nanosheets to construct a composite structure for inhibiting self-stacking. As expected, owing to the steric effect and high aspect ratio of rGO nanoribbons, the fabricated MXene/rGO hybrid electrode, with the addition of 5 wt% graphene oxide (GO), exhibits a greatly improved specific capacitance (397.4 F g−1 at 5 mV s−1) and an unparalleled rate capability (with a capacitance retention of 52.9% at 2000 mV s−1). This work sheds significant light on the development of MXene-based materials for advanced energy storage devices.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiangyu Wang,Yubing Sun,Qiang Wang,Lijun Tang,Hui Wang,Tiansheng Mu,Yongchao Zhang,Xiaodong Zhu,Jian Gao
Three-dimensional (3D) carbon materials are often used as carriers for anchoring iodine in zinc-iodine batteries (ZIBs). However, the physical stacking of carbon materials during the electrode assembly process, the weaker physical interactions between non-polar carbon materials and iodine species, and the scarcity of catalytic sites for iodine conversion led to a reduced catalytic activity for the iodine redox reaction, which fails to completely inhibit the shuttling of iodine species. Here, 3D ultrafine Cu-anchored CNT-rGO carriers (3D Cu@CNT-rGO) with interconnected structures are prepared using a simple laser-induced reduction strategy. The 3D microporous structure and excellent electrical conductivity of 3D Cu@CNT-rGO make it an ideal host for iodine. Ultrafine Cu nanoparticles introduce as catalysts accelerate the redox kinetics, efficiently catalyze iodine/polyiodide conversion, inhibit polyiodide shuttling, and enhance the electrochemical performance of ZIBs. The fabricated zinc-iodide micro-batteries (ZIMBs) delivers a high specific area capacity of 1.29 mAh cm −2 , a high area energy density (1.55 mWh cm −2 ) and a high area power density (33.58 mW cm −2 ) as well as excellent cyclin stability (80% capacity retention after 4000 cycles). Meanwhile, ZIMBs have excellent mechanical flexibility and have great potential for application in the field of integrated, miniaturized and flexible electronic devices.
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Advanced Materials Interfaces
·
2024
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IF 4.3
Xiaoju Yue,Lin Han,Shifeng Wang,Linan Dun,Jinnong Wang,Yuanhao Wang,Chun Du
Degradation of organic pollutants in wastewater is crucial for global environmental health. Semiconductor-based photocatalytic technologies have received widespread attention due to their ability to directly utilize solar energy, produce no secondary pollution, and offer long-lasting functionality. However, current photocatalyst preparation technologies face issues such as complex manufacturing processes, low efficiency, and the need for various additives. Therefore, this work proposes a simple and eco-friendly method to in-situ growth of reduced graphene oxide (rGO) onto magnesium oxide (MgO), forming a MgO@rGO core-shell structured photocatalyst through CO 2 thermal reaction process. After systematic study, the incorporation of rGO onto MgO core greatly extends the light absorption range from ultraviolet (UV) to visible wavelength, enabling substantially enhanced light capture and photoexcited carriers. Additionally, the core-shell heterojunction with a built-in electric field at the interface between MgO and rGO facilitates distinctly the separation and migration of the photogenerated charges. This structure-induced synergistic effect boosts the photocatalytic performance of MgO@rGO by a factor of 1.7, 4.1, 41.8, and 6.4, compared with MgO (stripped), MgO (pure), rGO, and commercially used TiO 2 , respectively. This work provides a simple and effective strategy for designing advanced functional nanocomposites to address environmental problems.
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