COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yuanlu Xu,Xin Dong,Yinan Chen,Na Liu,Xinmin Zhang,Chengwen Song,Xinfei Fan
The application of persulfate-based advanced oxidation processes (AOPs) for the removal of emerging pollutants has garnered increasing interest in the field of water pollution control. However, the synthesis of catalysts that simultaneously exhibit stability and exceptional performance is currently facing enormous challenges. In this study, the in-situ growth of nitrogen-doped carbon nanotubes on stratified Fe@RGO substrate was employed to fabricate a novel three-dimensional (3D) composite material for efficient persulfate activation. The innovative design effectively integrated the superior porosity and high conductivity properties of carbon materials, resulting in a unique synergistic effect that facilitated rapid diffusion of reactants and efficient electron transfer. Meanwhile, the incorporation of nitrogen doping can effectively regulate the binding between metal particles and the substrate, thereby enhancing the stability of active sites. This catalyst not only removed SMX ultra-fast in 10 minutes through PMS activation, but also maintained 93% degradation after 5 cycles. A series of radical testing and trapping experiments revealed that the degradation mechanism is primarily dominated by a non-radical pathway. Additionally, electrochemical experiments confirmed that the Fe@RGO/NCNTs with its 3D interconnected layered structure facilitated direct electron transfer. This work demonstrates the broad application prospects of 3D interconnected iron-nitrogen co-doped carbon materials in organic pollution removal.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jia Miao,Meifen Huang,Wenlong Sun,Zhehui Weng,Qiong Wu,Tongtong Gui,Qiong Xu,Xiangying Li,Haijun Pang
Sodium-ion batteries (SIBs) have gained increasing attention as a promising alternative to lithium-ion batteries, owing to the abundance and low cost of sodium. However, despite these advantages, the performance of SIBs is hindered by the larger ionic radius of sodium, which not only reduces ion migration rates but also significantly lowers the specific capacity. To address this challenge, the present study explores the synthesis of Na 5 PV 2 Mo 10 O 40 (PV 2 Mo 10 )-modified reduced graphene oxide (rGO) composites by employing imidazole ionic liquid (IL) as electrostatic attraction agent, this approach not only prevents the aggregation of polyoxometalates (POMs) but also increases the interlayer distance of rGO, improving the battery’s specific capacity and enhancing the diffusion rate of Na + ions. Experimental results indicate that the PV 2 Mo 10 -rGO-IL hybrid material exhibits exceptional electrochemical properties, characterized by significantly improved conductivity and an impressive specific capacity of 290mAh g −1 while achieving nearly 100 % Coulombic efficiency over 900 cycles. Furthermore, theoretical calculations reveal that the incorporation of POMs effectively reduces the electrode impedance of rGO and enhances the structural stability of POMs during cycling. This study opens up new avenues for the design of high-performance sodium ion batteries based on POMs.
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PubMed
高影响因子
Nano Research
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2024
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IF 9.5
Guo Chan,Shao Shiping,Zhang Xin,Tang Yunxiang,Wang Luxue,Liu Jiurong,Wu Lili,Bi Ke,Wang Fenglong
Aerogel-based composites hold promising application prospects as potential electromagnetic wave (EMW) absorption materials, yet the construction of such materials with ingenious microstructures, appropriate magnetic/dielectric multi-components, and integrated multifunctionality remains considerably challenging. Herein, a multicomponent Co/MnO/Ti 3 C 2 T x MXene/rGO (CMMG) hybrid aerogel featured with three-dimensional (3D) vertical directional channel architecture is reported. Benefiting from the synergistic effect arising from the 3D conductive networking structure, diverse heterogeneous interfaces, magnetic/dielectric multicomponent, and multiple loss pathways, the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities, characterized by a minimal reflection loss (RL min ) of −77.41 dB and an effective absorption bandwidth (EAB) of 6.56 GHz. Additionally, the remarkable hydrophobicity, exceptional thermal insulation capabilities, and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding environments. Interestingly, the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human motion. Thus, this research provides a viable design strategy for the development of lightweight, efficient, and multifunctional aerogel-based EMW absorption materials for various application scenarios.
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高影响因子
ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Danfeng Jiang,Zhenyu Chu,Jingmeng Peng,Jingyi Luo,Yangyang Mao,Pengqi Yang,Wanqin Jin
Currently, most metal oxides- or hydroxides-based and non-enzymatic sensors require a high alkali concentration in the working environment. Here, we designed a novel non-enzymatic sensor based on a 3D nanostructured Co(OH) 2 /rGO film to address this issue. The architecture of the hybrid film was in-situ constructed by the dense assembly of 200 nm flower-like Co(OH) 2 crystals bridged by rGO nanosheets . This structure possessed an extremely large specific surface area and an excellent conductivity which were beneficial for adsorbing OH to produce oxidative CoOOH or CoO 2 , even in a low alkaline condition. This material was able to mimic the functionality of glucose oxidase to oxidize glucose to gluconolactone and exhibited a good sensitivity at a wide alkaline range from 5 × 10 −3 to 1 mol L −1 NaOH solution. Moreover, this sensor showed a wide linear range, excellent selectivity, reproducibility and stability for real blood analysis.
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高影响因子
APPLIED SURFACE SCIENCE
·
2017
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IF 3.387
Xuejun Xu,Zhichun Si,Liping Liu,Zehao Wang,Ze Chen,Rui Ran,Yonghong He,Duan Weng
Noble metal free MoS 2 /g-C 3 N 4 catalyst has attracted intense attentions for visible light photocatalytic hydrogen evolution as a result of its earth abundance, low cost and unique heterojunctions stacked with two dimensional sheets. However, the low charge separation efficiency resulted from the poor conductivity of g-C 3 N 4 and MoS 2 , and lack of abundant active sites from coordinative unsaturated atoms in MoS 2 , restricts the photocatalytic hydrogen evolution activity and stability enhancement of MoS 2 /C 3 N 4 composite catalysts. Herein, CoMoS 2 /rGO/g-C 3 N 4 catalysts with ternary heterojunctions are prepared by facile solvothermal method, which exhibit high visible light photocatalytic activity and stability for hydrogen evolution. The optimal hydrogen evolution rate of CoMoS 2 /rGO/g-C 3 N 4 catalysts is 684 μmol g −1 h −1 when the content of CoMoS 2 is 2% and the content of rGO is 0.5%. The stability of CoMoS 2 /rGO/C 3 N 4 catalysts just decrease about 3% after 4 cycling runs for 16 h. The good catalytic performances of catalysts are attributed to the synergistic effect among the g-C 3 N 4 nanosheets, rGO nanosheets and CoMoS 2 nanosheets. The high conductivity of rGO nanosheets enhances the electron-hole separation and charge transfer, and Co doping increases the active sites for hydrogen evolution due to the increase of unsaturated atoms in CoMoS 2 nanosheets.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 23
·34607-34621
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IF 0
He Haixia,Cheng Yanhui,Qiu Siwei,Sun Lei,Jin Bohua,Yuan Xiangjuan
A series of ZnO decorated reduced graphene oxide (rGO) (ZnrGO x ) with different doping ratios were synthesized by the alkaline hydrothermal method using graphene oxide (GO) and Zn(NO 3 ) 2 ·6H 2 O as precursors, and subsequently used for the adsorption study of Cr(VI) in water. The morphology, crystalline phase structure, and surface elemental properties of ZnrGO x composites were revealed by XRD, SEM, BET, FT-IR, and XPS characterizations. The results showed that ZnO nanoparticles can be clearly seen on the surface of layered rGO. Meanwhile, as the doping rate increased, the C = C double bonds were broken and more carboxylic acid groups formed in ZnrGO x . In addition, the ZnrGO 0.1 composite had the most excellent adsorption performance and good stability, and reusability. The adsorption removal rate of Cr(VI) can reach 99%, and the maximum adsorption amount of Cr(VI) was 68.9655 mg/g in 3 h. The isothermal and kinetic model simulations showed that Cr(VI) adsorption on ZnrGO 0.1 composite is a chemical adsorption process, spontaneous and endothermic. Based on the concentrations of different valence states of Cr in the solid and liquid phases, 40% of Cr(VI) was reduced to Cr(III) on the surface of ZnrGO 0.1 composite. Moreover, the adsorption-reduction mechanisms of Cr(VI) on ZnrGO 0.1 composite were further elucidated. The ZnrGO 0.1 composite manifested great potential as an efficient adsorbent for Cr(VI) removal. Graphical Abstract
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Journal of Energy Storage
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2025
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IF 9.8
Wenjing Chen,Lan Jiang,Xiaowu Hu
Phase change material (PCM) is a promising energy material for applications, but their inherent drawbacks, such as poor thermal conductivity and vulnerability to leakage, strongly limit their use in efficient energy storage and thermal management. To overcome these drawbacks, this paper innovatively uses a high-temperature one-step reduction method to simultaneously prepare Ag particles and reduced graphene oxide (rGO) and carbonize melamine foam (CMF) to improve thermal conductivity as well as photo-thermal conversion, and ultimately a series of shape-stable thermally conductive reinforced composite phase change material (CPCM) are prepared using vacuum impregnation. The high-density three-dimensional thermal conductivity network of Ag@rGO-CMF was able to significantly increase the thermal conductivity of CPCM (up to 104.2 % enhancement). The prepared CPCM have high loading ratios (96.9 % ~ 97.8 %), high enthalpies (154–157.7 J/g), high photo-thermal conversion efficiencies (81.3 % ~ 90.5 %), and excellent thermal management capabilities of electronic devices. This study provides a simple and feasible method for the preparation for high performance CPCM.
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MATERIALS CHEMISTRY AND PHYSICS
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2024
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IF 4.3
Hao Tian,Jie Ma,Bai Yang,Ran Li,Ronghai Yu
It is necessary to broaden absorption bandwidth, regulate applied frequency, reduce the weight and maintain strong absorption for magnetic microwave absorbing materials by constructing suitable material structures to satisfy the requirements for wide applications in various electromagnetic devices. In this work, well-structured amorphous-Co@Nd(BO 2 ) 3 /rGO nanocomposites have been fabricated using a selective chemical reduction in a mixed aqueous solution containing Co 2+ and Nd 3+ ions along with GO sheets reduced by NaBH 4 as the reductant, in which only Co 2+ and GO but no Nd 3+ ions were reduced. Very low coercivity of 0.4 Oe is achieved in amorphous-Co@Nd(BO 2 ) 3 /rGO nanocomposites due to amorphous Co@Nd(BO 2 ) 3 core-shell nanoparticles uniformly anchored on rGO sheets. These soft magnetic rGO-based nanocomposites exhibit high-frequency microwave absorption performance including a minimum reflection loss ( RL min ) value of −84.09 dB at 15.38 GHz for a 2.1 mm thickness at an applied frequency range (12.31–18 GHz) covering almost the entire Ku band. Moreover, a much wider absorption band of 7.24 GHz (10.67–17.89 GHz, RL ≤ −10 dB) with a 2.3 mm thickness along with a RL min value of −35.92 dB is also achieved. These rGO-based magnetic composites also show good structural stability , low density and easily controlled material compositions along with facile chemical fabrication suitable for mass production, which promises their latent use in high-performance microwave absorbing devices. Crystallization behavior of a new amorphous Nd(BO 2 ) 3 phase was also investigated.
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高影响因子
CARBON
·
2024
·
IF 10.5
Runze Feng,Mingnv Guo,Zhongqing Yang,Jiaqi Qiu,Ziqi Wang,Yongliang Zhao
The photothermal-catalyzed CO 2 reduction is severely limited by the low carrier transport capacity. In this paper, the in-situ construction of 0D/2D Bi 2 MoO 6 (BMO)/reduced Graphene Oxide (rGO) heterojunction was synthesized. The excellent photothermal conversion ability of rGO promotes the high dispersion of BMO quantum dots (QDs). The size of synthesized BMO QDs is about 4.26 nm and the temperature of the catalysts can quickly rise to 68.0 °C. XPS results show that the C–O–Bi interfacial electronic bridge between surface oxygen-containing groups and BMO QDs was successfully induced by modulating the degree of GO reduction. Electrons generated by BMO QDs migrate to the rGO surface rapidly, inducing rGO as a new electron-rich surface for rapid activation of CO 2 . The 1:5 BMO/rGO (NaBH 4 ) CO yield reaches 186.87 μmol/g, which is 4.64 times as much as BMO QDs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Siyu Liu,Xingmin Liu,Xiaoyu Cui,Mingwei Zhu,Shaowei Lu
3D direct ink writing technology based on two-dimensional (2D) MXene nanomaterial inks receives attention in the field of pressure sensing for simplicity of fabrication, programmable geometry with controllable function and performance. However, it is still a huge challenge to print excellent macro-structure with ultralow-concentration MXene inks, attributed to its weak gelation ability. Herein, we construct a MXene/reduced graphene oxide (MX/rGO) architecture (0.012 g cm −3 ) with macroscopic (hierarchical lattice) and microscopic (porous) structure by using ultralow-concentration emulsion-based inks of MXene (5.882 mg mL −1 ). The introduction of octadecylamine enhances the bonding between the MXene and GO, significantly improving the gelation ability of the ink with low-concentration 2D nanomaterials. More importantly, the MX/rGO pressure sensor achieves a high sensitivity (166.957 kPa −1 ), wide sensing range (0.028∼100 kPa), and excellent cyclic stability (10500 cycles) due to its 3D hierarchical lattice porous structure. These sensing capabilities enable the sensor to detect various human motions, such as pulse beating, vocal cord vibration, facial expressions, different joint movements and pressure distribution. Undoubtedly, this work provides a broad development prospect for the customized flexible pressure sensors based on MXene ink 3D printing technology.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Liying Sheng,Zhenjiang Li,Alan Meng,Qinhai Xu
The novel nanocomposite of Ni(OH) 2 nanoparticles over reduced graphene oxide and poly (3,4-ethylenedioxythiophene) hybrid film (Ni(OH) 2 @PEDOT-rGO) have been successfully fabricated via a facile, scalable and easy-to-control electrodeposition method. The characterization results of scanning electron microscope (SEM) and electrochemical techniques show that Ni(OH) 2 nanoparticles with an average particle size about 10 nm are uniformly deposited on PEDOT-rGO hybrid film with rough surface and reveal outstanding performance for detecting glucose. The enzyme-free glucose sensor exhibits an ultrafast response time (< 1 s), a wide linear range (0.002–7.1 mM), a low detection limit (0.6 μM) and a high sensitivity (346 μA mM −1 cm −2 ). Moreover, the sensor also displays superb selectivity, excellent reproducibility and good stability. The outstanding properties of the sensor may be attributed to the synergistic effect of Ni(OH) 2 nanoparticles possessing high electro-catalysis activity and PEDOT-rGO having well conductivity. More importantly, the sensor was successfully used to determine glucose in the real samples. In addition, the mechanism of electrodeposited PEDOT-rGO and glucose oxidase was investigated.
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高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Junhua Lu,Hedong Jiang,Pingchun Guo,Jiake Li,Hua Zhu,Xueyun Fan,Liqun Huang,Jian Sun,Yanxiang Wang
In recent years, significant progress has been made in the development of supercapacitors (SCs) for high-power applications, including electric vehicles, consumer electronics, military, and industrial uses. One crucial research area focuses on enhancing the electrochemical properties of SCs through the development of superior electrode materials. A composite electrode material (CuS/Cu 2 S/rGO) that combines Cu-sulfur compounds and graphene has been synthesized using the continuous ion layer adsorption (SILAR) method on reduced graphene thin films (rGO). The CuS/Cu 2 S/rGO film SC demonstrates exceptional electrochemical properties, attributed to the synergistic effect of CuS, Cu 2 S, and rGO. At a current density of 0.5 A g −1 , the mass-specific capacitance reaches 355.70 F g −1 , with a high energy density of 49.40 Wh kg −1 and a peak power density of 8511.49 W kg −1 . Even at an increased current density of 5 A g −1 , the mass-specific capacitance remains impressive at 239.62 F g −1 , indicating excellent rate performance. Furthermore, after 1000 constant current charge and discharge cycles, the material maintains a capacity retention rate of 87.13 %, underscoring its robust cycling stability.
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高影响因子
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