FUEL
·
2026
·
IF 7.8
Bohan Zhang,Chang Wen,Zhaoxi Ye,Haozhuo Huang,Qingsong Hua,Ke Liu,Tianyu Liu,Zijian Zhou,Zhengkai Tu
Developing highly efficient and durable bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic environments is vital for advancing proton exchange membrane water electrolysis (PEMWE) technology. Herein, we report the design and synthesis of a three-dimensional Pt-RuO 2 -based catalyst supported on reduced graphene oxide (rGO), denoted as 3D Pt-RuO 2 /rGO, which exhibits outstanding bifunctional electrocatalytic activity by tuning its electronic structure and the binding strength of reaction intermediates. The 3D porous architecture not only facilitates fast charge transfer and mass transport of the catalysts but also increases the exposure of active sites. Remarkably, 3D Pt-RuO 2 /rGO delivers low overpotentials of only 200 mV for OER and 14 mV for HER at 10 mA cm −2 in 0.5 M H 2 SO 4 . It also enables overall water splitting (OWS) at a cell voltage as low as 1.48 V at 10 mA cm −2 , outperforming conventional noble metal-based materials (NMBs). Furthermore, a 3D Pt-RuO 2 /rGO||3D Pt-RuO 2 /rGO MEA delivered a low cell voltage of 1.549 V at 1 A cm −2 and maintained stable operation for 300 h in a PEM single-cell electrolyzer. Operando differential electrochemical mass spectrometry (DEMS) shows that the OER of 3D Pt-RuO 2 /rGO under acidic conditions follows the adsorption evolution mechanism (AEM). Density functional theory (DFT) calculations further reveal the synergistic interaction between oxygen vacancies and the metal/oxide heterointerface. This interface-vacancy synergy not only facilitates the exposure of abundant active sites, but also promotes electron transfer from Pt to RuO 2 , thereby optimizing the kinetics of water dissociation. This work provides valuable insight into the rational design of bifunctional electrocatalysts for high-efficiency acidic water electrolysis and highlights the potential of 3D heterostructured materials for future PEMWE systems.
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高影响因子
International Journal of Electrochemical Science
·
2026
·
IF 3.9
Hao Li,Minru Su,Chen Shi,Jie Hu,Meixia Shi
Three-dimensional (3D) electrochemical systems effectively improve electron transfer rates by increasing electrode surface area and active site density using particle microelectrodes. To investigate the potential utility of a transition metal–carbon particle electrode, a 3D electrochemical activation system for peroxydisulfate (PDS) using a silver nanoparticle (AgNP)–incorporated reduced graphene oxide (rGO) hydrogel particle electrode (3D-PDS/AgNP/rGO) was constructed for achieving enhanced acid orange 74 (AO 74) degradation. The AgNP/rGO hydrogel was prepared via a low-temperature hydrothermal reduction method in which AgNPs were uniformly dispersed within the porous rGO matrix. Optimization of the 3D-PDS/AgNP/rGO process parameters demonstrated that AO 74 degradation efficiency was strongly dependent on AgNP/rGO concentration, PDS concentration, applied current, and solution pH. The degradation efficiency reached 96.31% within 3 h, and the degradation rate constant exhibited a 2.35-fold higher than that of a 2D-PDS system that lacked a particle electrode. Water matrix analysis revealed that Cl − enhanced AO 74 degradation, whereas CO 3 2− and PO 4 3− inhibited it. The use of radical scavengers identified hydroxyl radicals and sulfate radicals as the generated dominant reactive species. 3D-PDS/AgNP/rGO exhibited remarkable stability, maintaining 84.44% degradation efficiency after five cycles and outperforming the conventional 2D-PDS system. This study demonstrated that 3D-PDS/AgNP/rGO met the technical requirements for efficient degradation of organic pollutants and exhibited application potential in azo dye wastewater treatment.
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Jiachen Zhao,Huilin Hu,Chao Wang,Yingting Li,Xueyu Jiang,Ming Zhang,Fangkai Han,Ning Yang,Xiaodan Liu,Jiahua Wang,Yingli Wang,Shuo Duan,Huang Dai,Fuwei Pi
Capsaicin, the primary bioactive compound responsible for the pungency in chilli peppers, poses potential health risks at excessive levels. This study introduced a novel approach for capsaicin detection in food products using a reduced graphene oxide and multi-walled carbon nanotubes (rGO/MWCNTs)-based conductive ink integrated electrodes (IDE) produced via inkjet printing. A hybrid ink was synthesized by dispersing rGO and MWCNTs in polyethylene glycol 400, with the mass ratio of 1:2 to facilitate electron transfer. The rGO/MWCNTs-printed IDE sensor provided a dynamic range of 0.1 μM to 100 μM and a detection limit as low as 0.035 μM. The sensor exhibited good repeatability and selectivity, and maintained 97.5% of its initial response over 28 days. Practical applicability was validated in red, green, millet chilli pepper extracts and hotpot seasoning, yielding recoveries of 92.71–108.48%. The printed rGO/MWCNTs IDE platform enables sensitive capsaicin analysis and is suitable for food quality control
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高影响因子
ECS Journal of Solid State Science and Technology
·
2026
·Vol. 15
·期 5
·053006
·
IF 2.4
Hui Liu,Anqi Li,Qingnan Chen
The improvement in energy storage performance of graphene/polymer composites has long been restricted by insufficient breakdown strength (Eb) and high dielectric loss, both of which result from conductive losses caused by the aggregation of graphene nanosheets. In this paper, aminopropylisobutyl polyhedral oligomeric silsesquioxane (POSS-NH2) encapsulated graphene oxide (GO) (GO-g-POSS) hybrids were prepared to inhibit the restacking of graphene and block the formation of conductive paths. Furthermore, the design of sandwich-structured films is also an efficient approach to improving the breakdown performance of composite materials. Novel sandwich-structured composite films containing outer layers of BNNS/PVDF films and a middle rGO-g-POSS/PVDF layer were successfully prepared by the layer-by-layer assembly process. The B-0.50-B sandwich-structured composites achieved an optimal discharge energy storage density (Ue) of 9.08 J cm−3 and Eb of 432 MV m−1.
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高影响因子
BMC Chemistry
·
2025
·Vol. 19
·期 1
·1-15
·
IF 4.6
Lei Ying,Bao Qijing,Lin Feng,Zhang Jian,Zhang Yanji,Wu Yuechao,Lv Liang,Ding Liyong
Graphite carbon nitride (g-C 3 N 4 ) has emerged as a promising photocatalyst for visible-light-driven applications due to its suitable band structure. However, the rapid recombination of photogenerated electron-hole pairs in bulk g-C 3 N 4 significantly hinders its photocatalytic efficiency. In this study, we report the fabrication of a ternary g-C 3 N 4 /MoS 2 /rGO (CMG) nanocomposite via in situ photoreduction-induced exfoliation. The introduction of MoS 2 and rGO not only facilitates the exfoliation of g-C 3 N 4 into ultrathin nanosheet, thereby exposing more active sites, but also enables the formation of tightly coupled heterojunctions that promote charge separation and transfer. Photoluminescence (PL) analyses confirm the suppressed recombination of charge carriers, indicative of enhanced charge dynamics within the heterojunction between MoS 2 , rGO and g-C 3 N 4 . Among the synthesized materials, the optimized CMG-175 composite exhibits remarkable photocatalytic activity, achieving a 95.7% degradation rate of Rhodamine B (RhB) within 30 min under visible light irradiation, which is 23.6-fold enhancement compared to pristine g-C 3 N 4 . Mechanistic studies reveal that photogenerated holes and superoxide radicals are the predominant reactive species driving the degradation process. This work highlights a rational design strategy for constructing high-performance g-C 3 N 4 -based heterojunction photocatalysts and provides valuable insight into the synergistic interactions among MoS 2 , rGO, and g-C 3 N 4 for efficient organic pollutant removal.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yuanyuan Zhang,Dong Zhang
All-solid-state structural supercapacitors (ASSCs), as a kind of multifunctional energy storage devices, show great application potential in the field of building. However, the inability to achieve high energy density is a major bottleneck in the application of ASSCs. Herein, a novel 3D nanosheet material is designed by a facile method, aiming to boost areal-energy-density for ASSCs. By doping of S (Na 2 S·9 H 2 O) on the rGO/N 1 C 1 M nanosheet (rGO/N 1 C 1 M-S 3 ’), we achieved an extremely areal capacitance of 9407.62 mF/cm 2 at 5 mA/cm 2 , which is much higher than 4421.33 mF/cm 2 (rGO/N 1 C 1 M). Definitely, this is the best performance reported so far for rGO/NCM electrode. An asymmetric ASSCs (1 cm × 1 cm×0.2 cm) prototype device exhibits excellent performance, with a high areal capacitance of 242.82 mF/cm 2 , a high areal-energy-density of 0.076 mWh/cm 2 at 3 mA/cm 2 . As a proof-concept-application. the ASSCs was enlarged to 4.5 cm × 4.5 cm × 0.2 cm, three ASSCs connected in series can light up a green light emitting diode indicator about ～1066 s, and can still work normally under the pressure of 500 g. The demonstration of employing rGO/N 1 C 1 M-S 3 ’ electrode opens up new opportunities to fabricate high performance ASSCs for structure energy storage in building.
研究领域:
材料科学
·
能源存储
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121293
·
IF 7.2
Yang Liu,Tingting Fan,Changhao Liu,Yun-Ze Long
Managing oily wastewater under harsh conditions poses a significant challenge in environmental protection. Conventional membranes are often ineffective in treating oily wastewater under complex environmental conditions and typically fail to achieve complete oil–water separation. This work reports the preparation of a reduced graphene oxide (rGO)/zeolitic imidazolate framework (ZIF-8) @ polyphenylene sulfide (PPS) fiber membrane by in-situ growth of ZIF-8 on the rGO-coated PPS fiber membrane. The incorporation of the rGO increases the roughness of the fibrous membrane and enhances the bond between the polymer membrane and the ZIF-8 layer, as the oxygen-containing groups of rGO can interact with the Zn 2+ of the ZIF-8 precursor, facilitating the preferential growth of ZIF-8 crystals on the rGO surface. The resulting rGO/ZIF-8@PPS membrane exhibits underwater superoleophobic and under-oil superhydrophilic properties, endowing it with switchable oil-water separation capabilities (oil-passing water-blocking or water-passing oil-blocking). During the oil (chloroform)/water separation process, it achieves high efficiency (99.96 %) and flux (27,176 L m −2 h −1 ). After 10 separation cycles using either water or oil as the permeating phase, the membrane maintains a high filtration flux (20,500 L m⁻² h⁻¹) and separation efficiency (99.97 %). Additionally, it can efficiently separate a range of oil/water mixtures under different acidic and alkaline conditions, retaining excellent separation efficiency and flux even after 10 cycles. This composite fibrous membrane provides a novel approach for treating large-scale oily wastewater in harsh environments.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 8.2
Yechen Wang,Hao Yu,Sufang Guo,Qi An
In this work, PVDF-HFP-based piezoelectric composite films incorporating MgO and rGO nanofillers were fabricated via a facile phase-separation method. The influences of filler composition and loading amount on their piezocatalytic and antibacterial performances were systematically investigated. MgO@rGO/PVDF-HFP film (4 wt % of MgO and 4 wt % of rGO) exhibited the best piezocatalytic activity, achieving rapid degradation on RhB, MO, and MB dyes with high efficiencies of 95.88%, 91.42%, and 98.15%, respectively. The dyes were not only decolorized but also further mineralized into inorganic carbon. The composite film also demonstrated excellent antibacterial performance, reaching 100% inhibition against E. coli and S. aureus upon ultrasonication. The superior catalytic behavior is attributed to the formation of the MgO@rGO heterojunction, which optimizes the energy band for the redox reaction, thereby promoting the generation of reactive oxygen species (ROS). Under ultrasonic excitation, the MgO@rGO/PVDF-HFP film produced substantially higher ·O2–, ·OH, and H2O2 levels than the other films, and ROS-trapping experiments confirmed ·OH and electrons as the primary active species. These enhancements arise from efficient charge transfer across the MgO@rGO interface and chemically induced polarization within the PVDF-HFP matrix, which together strengthen the piezoelectric response. This study demonstrates that constructing heterojunction nanofillers in flexible polymers is an effective strategy to enhance piezocatalysis for environmental purification and antimicrobial applications.
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PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2026
·
IF 3.5
Ren Qiuxuan,Xu Jiaojiao,Liu Yuqi,Ma Aijie,Zhang Gai
The development of ORR catalysts that combine high activity with low cost is essential for advancing the practical implementation of related technologies. In this work, an ORR catalyst Co 2 Pc 2 (EP) 4 /RGO was successfully synthesized via a facile π-π self-assembly approach, where spherical binuclear metallophthalocyanine (Co 2 Pc 2 (EP) 4 ) was loaded onto the surface of reduced graphene oxide (RGO). The structural and morphological characteristics of Co 2 Pc 2 (EP) 4 /RGO were systematically investigated using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Electrochemical performance tests showed that the onset potential ( E 0 ) of Co 2 Pc 2 (EP) 4 /RGO was comparable to that of commercial Pt/C, while the half-wave potential (E 1/2 ) of Co 2 Pc 2 (EP) 4 /RGO exhibited a positive shift of 130 mV compared to that of pure Co 2 Pc 2 (EP) 4 . The electrocatalytic activity of Co 2 Pc 2 (EP) 4 / RGO dramatically enhanced because of π-π interactions between Co 2 Pc 2 (EP) 4 and RGO, which promoted the oxygen molecules concentration around the active sites. The high oxygen molecules concentration is conducive to form an intermediate O 2 ads - Co 2 Pc 2 (EP) 4 @RGO to decrease the activation energy of the *OOH dissociation step in a four-electron ORR process and the oxygen molecules could be reduced more easily. This study offers a new direction for the design of oxygen reduction reaction catalysts.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Fan Zhao,Huiling Du,Zhuo Li,Qianqian Li,Jie Lu,Na Cao,Yupu Shi
Ga 2 O 3 has been used as an anode for lithium batteries due to its high theoretical capacity. However, limited electronic conductivity and severe volume expansion limit its application. Herein, to circumvent these issues, we proposed to design multiscale interface of Ga 2 O 3 @rGO. It was synthesized to achieve superior multiplicative performance (218 mAh g −1 at 5.0 A g −1 ) and cycling performance (428.7 mAh g −1 after 100 cycles at 100 mAh g −1 ). These findings suggest that the nanoscale morphology of Ga 2 O 3 and nanographene work together to promote electron transfer, ultimately enhancing the cycling stability of the composites.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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高影响因子
MOLECULES
·
2022
·Vol. 27
·期 19
·6518
·
IF 4.927
Xinjiang Zhang,Meng He,Yongzhong Zhan,Wenchao Yang,Kaifeng Wu
Copper matrix composites have a wide application as magnetic conductive materials, electromagnetic materials, electrical discharge machining materials, etc. Such materials are expected to have a good combination of excellent electrical conductivity and good mechanical strength. In this work, micro/nano hybrid reinforcements with Fe microspheres and reduced graphene oxide (rGO) nanosheets were developed for copper matrix composites. The rGO/Fe/Cu powders were firstly wet-mixed and then densified by the vacuum hot-pressing sintering to obtain the bulk compacts. Microstructure, electrical conductivity and mechanical properties of such compacts were investigated. Microstructural result of as-sintered compacts shows that the Fe microspheres could distribute in the matrix uniformly, and rGO nanosheets exhibit both agglomerated and dispersed states. The grain size of Cu matrix decreased with the increase of the rGO content. Hardness, compression and tensile 0.2% yield strength of the as-sintered compacts were improved evidently by the addition of the hybrid Fe/rGO, comparing with pure Cu and single Fe-added composites. However, a lower electrical conductivity appeared in the more rGO-added composites, but still reached more than 33.0% international annealing copper standard (IACS). These performance change could be sought in the spatially geometrical distribution and characteristics of such micro/nano Fe/rGO hybrid addition, and the relevant mechanisms were discussed.
研究领域:
材料科学
·
复合材料
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机械工程
·
电气工程
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Lu Peng,Peng Nian,Jingwei Feng,Xiangxiang Han,Binhua Cui,Songsheng Lu,Jie Zhang,Chenming Li,Aiyong Zhang
The present study evaluated fabrication of bioactivated carbon (BAC) from waste activated sludge (WAS) for methyl tert-butyl ether (MTBE) removal from aqueous solution. BACs were prepared using KOH, H 3 PO 4 , and ZnCl 2 as chemical activation reagents, followed by thermal activation. Batch experiments with different BAC types and dosages, solution pH, initial MTBE concentrations, and contact times were conducted to investigate the BAC effectiveness. The obtained data were analyzed using the kinetics and isotherm model and also with artificial neural network (ANN). The result of Fourier transform infrared (FTIR) spectra of WAS and BAC was depicted that the C–H and C–C were major surface functional groups. The ZnCl 2 activated carbon had the highest adsorption capacity for MTBE adsorption, followed by H 3 PO 4 and KOH activated carbons. The results showed that the highest MTBE removal was observed at solution pH equal to 4 and approximately 30% of MTBE could be adsorbed with 30 min contact time. It was also found that MTBE adsorption followed the R–P isotherm and pseudo-second order (type 1) kinetic models. During ANN modeling, the optimum neurons number for Levenberg–Marquardt training algorithm was determined equal to 5 with highest R 2 value and lowest mean square error were found to be 0.99 and 5.7 × 10 –4 , respectively.
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
·
物理化学
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高影响因子
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