Journal of Materials Chemistry A
·
2026
·
IF 9.2
Rujie Yang,Pengxu Wang,Liuyuan Zhu,Yingjie Di,Yingying Huang,Binjie Zhou,Shujin Wu,Haiping Fang,Shanshan Liang
Graphene oxide (GO) membranes are limited by inherent structural instability and relatively low permeability in aqueous environments, which hinder their practical application in waste water treatment. To address these challenges, we engineered reduced graphene oxide (rGO)/MXene heterogeneous membranes by constructing these two kinds of two-dimensional membranes. The resulting rGO/MXene heterogeneous membranes achieved an exceptional separation performance, with the highest water permeance of up to 401.2 L m⁻² h⁻¹ bar⁻¹ while maintaining 99.7% rejection of dye molecules. The water permeance was 2.4 times greater than that of pristine rGO membranes and competitively surpasses most advanced nanofiltration (NF) membranes reported for dye wastewater treatment. More importantly, the rGO/MXene heterogeneous membranes exhibited outstanding mechanical robustness under demanding filtration environments. Notably, the membrane maintained structural integrity after 50 deformation cycles (stretching/bending) in hydrated conditions. Additionally, rGO/MXene heterogeneous membranes showed good antifouling performance. Overall, these findings indicate the strong potential of such new materials as durable and high-efficiency separation material membranes for industrial water-treatment applications.
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COMPOSITES PART B-ENGINEERING
·
2026
·
IF 14
Wenqiang Wan,Wenbo Duan,Kaiming Liang,Yifei Li,Xingyu Hu,Pengyu Zhu,Shuye Zhang
Efficient solar photothermal conversion requires broadband light absorption and rapid nonradiative energy dissipation. Here, we report a microwave-assisted strategy to simultaneously deoxygenate graphene oxide, reconstruct defect states, and induce in situ formation of AlCoCrFeNi high-entropy alloy nanoparticles on reduced graphene oxide, forming strongly coupled HEA–rGO heterointerfaces. Time-resolved structural analysis identifies a narrow kinetic window of 15–20 s at 900 W, where oxygen removal, sp 2 -network restoration, HEA nucleation, and interfacial anchoring occur concurrently. Spectroscopic analyses show that microwave treatment reconstructs rather than simply removes defects, transforming oxygen-associated localized states into partially delocalized electronic states coupled with the π-conjugated carbon network and HEA–rGO interfaces. This electronic rearrangement lowers the apparent optical transition energy from 1.58 eV for pristine GO to 0.86–0.92 eV for the microwave-treated HEA–rGO samples while retaining substantial defect-related states. Consequently, the optimized HEA–rGO composite shows enhanced and flattened absorption across 300–800 nm, suppressed radiative recombination, faster heating rates, and higher steady-state temperatures under 1–3 sun irradiation. Machine-learning-assisted descriptor analysis and first-principles calculations further reveal coupled defect-tail-state regulation, interfacial charge redistribution, near-Fermi-level state enrichment, and d–p orbital coupling. This work establishes a processing–structure–electronic-state–performance relationship for microwave-engineered HEA–rGO photothermal composites.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Shiyu Jia,Lei Zha,Xiangbo Zhao,Shouli Bai,Ke Tian,Yongjun Feng
Based on the advantages of low cost, photoelectrochemical stability and non-toxicity of BiVO 4 , we prepared BiVO 4 photoanode by the classical electrodeposition method and grew Bi 2 S 3 in situ relying on its own bismuth source to construct a type-II heterojunction. The BiVO 4 /Bi 2 S 3 /rGO ternary photoanode exhibits excellent PEC performance under the synergistic effect of rGO modification and heterojunction. The results show that the photocurrent density of the BiVO 4 /Bi 2 S 3 /rGO photoanode at 1.23 V vs RHE reaches 2.40 mA·cm -2 , which is 3.4 times higher than BiVO 4 (0.70 mA·cm -2 ), the onset potential is negatively shifted by 140 mV compared with BiVO 4 , and the highest IPCE and ABPE efficiencies reach 39.68% and 0.24%, respectively, while the charge transfer resistance R ct was reduced to 163 Ω. The enhancement is attributed to the construction of the heterojunction and its synergistic effect with rGO, which is from extending the visible light absorption of the photoanode, promoting the effective separation of carriers, and accelerating of interface charge transfer as well as providing more active sites for water oxidation.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ji Yu,Li Li,Zishuang Yue,Zhenyu Yang,Jianxin Cai
In this work, a porous core–shell composite composed of reduced graphene oxide (rGO)-wrapped SnO 2 fibers (SnO 2 fibers/rGO composite) was fabricated through electrospinning assisted by pyrolysis. The special core–shell structure showed that porous SnO 2 fibers as the “core” were completely protected by multilayer rGO as the “shell.” Lithiation of SnO 2 occurred through Li diffusion through the rGO wrapped into the SnO 2 fibers, and natural void space facilitated SnO 2 expansion upon lithiation. This unique structure effectively prevented the aggregation and pulverization of SnO 2 fibers during lithiation and delithiation. The SnO 2 fibers/rGO composite electrode presented a super-high discharge capacity of 2,141 mAh g -1 at a current density of 0.4 A g -1 , 1,858 mAh g -1 at 0.8 A g -1 , 1,520 mAh g -1 at 1.6 A g -1 , and 874 mAh g -1 at 2.0 A g -1 after 10 cycles. The electrode showed a discharge capacity of 658 mAh g -1 at a current density of 4 A g -1 after 1,000 cycles.
研究领域:
材料科学
·
能源存储
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Journal of Cleaner Production
·
2022
·
IF 11.072
Hualin Jiang,Qi Wang,Pinghua Chen,Huitao Zheng,Jinwen Shi,Hongying Shu,Yanbiao Liu
The development of advanced and robust photocatalysts is vital for efficient photocatalytic degradation of the antibiotic tetracycline . Herein, a hierarchical heterojunction (Bi)BiOBr/rGO was facilely synthesized by employing an in-situ reduction strategy. An obvious synergistic effect between adsorption and photocatalysis was observed. A >98% tetracycline degradation efficiency was obtained within 20 min, and high performance could be maintained for over 50 h in a continuous operation without any post-treatment. The experimental and DFT calculation results suggested that there existed a built-in electric field between the interfaces, leading to the fast electron migration. Furthermore, rGO could significantly enhance the tetracycline adsorption, and Bi largely suppressed the charge carrier recombination owing to the surface plasmon resonance (SPR) effect. A possible tetracycline degradation pathway was proposed based on the HPLC-MS analysis. This study provides pathways for the rational design of advanced and robust photocatalysts to effectively degrade emerging contaminants in practical continuous-flow configurations.
研究领域:
环境科学
·
材料科学
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 24
·1707
·
IF 2.8
Van Ngo Hoanh,Nguyen Hung Tran,Le Hieu Trung,Le Thanh Huu,Vu Thien Tri,Pham Kien Trung,Phung Thinh Xuan
A study area in supercapacitor research is the design and manufacturing of composite electrode materials that combine the advantages of various materials. The rGO/CoFe 2 O 4 composite material is produced by growing cobalt ferrite particles on the surface of rGO using a simple and highly efficient thermal reduction technique. The results show that the electrochemical properties of rGO are significantly improved by the incorporation of cobalt ferrite. rGO sheets are used as supporting frameworks for the CoFe 2 O 4 nanoparticles, while the CoFe 2 O 4 particles provide more active sites for redox reactions. The prepared rGO/CoFe 2 O 4 show excellent electrochemical properties, with a high specific capacitance of 283 F/g at a current density of 0.1 A/g and a specific capacitance retention of 90.5% after 1000 cycles. The attractive performances exhibited by rGO/CoFe 2 O 4 composites make them potential electrode materials for supercapacitors in future.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
·
功能材料
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WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-17
·
IF 2.9
Gao Wei,Li Yufeng,Zhao Jitao,Zhang Zhe,Tang Weiwei,Wang Jun,Wu Zhenyu
Methylene blue (MB), as a typical pollutant in industrial dyestuff wastewater, has caused serious water pollution. Therefore, reduced graphene oxide (rGO)/TiO 2 nanocomposites were synthetized by a simple hydrothermal technique and used as photocatalyst to degrade MB. It was illustrated when TiO 2 nanoparticles were loaded 5wt.% rGO framework, nanocomposite had a huge specific surface area of 176.45 m 2 g −1 and the average pore size of 4.25 nm. Effects of the rGO fraction in rGO/TiO 2 photocatalyst, the rGO/TiO 2 photocatalyst content, the initial pH, and the initial MB concentration on MB degradation efficiency were studied. The degradation efficiency about 98.18% was acquired at 5rGO/TiO 2 content of 0.4 g L −1 , pH = 6, MB concentration of 60 mg L −1 . The degradation efficiency of 5rGO/TiO 2 for MB was still as high as 86.24% after the tenth cycles, demonstrating rGO/TiO 2 nanocomposites were useful for the practical application. The potential photocatalytic mechanism of rGO/TiO 2 for MB degradation was immediate oxidative degradation procedure, and the combined action of \({O}_{2}^{\bullet -}\) , \({OH}^{\bullet }\) and h + can contribute to the photocatalytic degradation of MB. Furthermore, the photocatalytic degradation kinetic of rGO/TiO 2 for MB under UV irradiation was first-order model.
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ChemElectroChem
·
2026
·Vol. 13
·期 9
·e70192
·
IF 5.2
Behroz Khan,Muhammad Alim,Ayesha Tariq,Tilahun Yai Fayesa,Mathar Hamza,Amjd M. H. N. Al-Muraisy,Bin Wang,Rashid Iqbal
The electrochemical transformation of carbon dioxide into valuable fuels represents a critical pathway for sustainable energy cycles. A principal obstacle in this field is the creation of affordable and effective electrocatalysts that combine high conversion rates with precise control over reaction products. To overcome these limitations, we have developed a composite in which copper sulfide nanoflowers are grown directly on a reduced graphene oxide (rGO) matrix via a one-pot synthesis. Detailed material analysis indicates that the presence of rGO promotes a crystallographic shift from the covellite (CuS) structure to a metastable digenite (Cu 7.2 S 4 ) phase. Spectroscopic investigations verify substantial electron transfer at the Cu 7.2 S 4 /rGO interface, leading to a modified electronic configuration around the copper sites. In electrochemical tests, the hybrid materials display markedly improved CO 2 reduction performance. The optimized Cu 7.2 S 4 /rGO-10 catalyst delivers a Faradaic efficiency (FE) of 82% for formate at −0.5 V versus reversible hydrogen electrode, a significant improvement over the pure CuS benchmark (64%). Furthermore, tuning the rGO loading redirects the catalytic selectivity, with the Cu 7.2 S 4 /rGO-40 variant yielding a 75% combined FE for liquid products, predominantly ethanol. These composites also demonstrate minimal hydrogen evolution and superior long-term stability. This work underscores the multifunctional contribution of rGO in stabilizing unconventional material phases, enhancing electrical conductivity, and directing reaction mechanisms, thereby establishing a generalizable approach for fabricating high-performance electrocatalysts for carbon-neutral technologies. Graphical Copper sulfide nanoflowers grown on reduced graphene oxide undergo a phase transition to metastable digenite (Cu 7.2 S 4 ), enabling efficient CO 2 electroreduction. The optimized catalyst achieves 82% Faradaic efficiency for formate, while tuning rGO content shifts selectivity toward ethanol. This work presents a versatile strategy for designing advanced electrocatalysts through phase and interface engineering.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rongjie Zhe,Haoyun Dou,Xuanpan Xu,Ziwei Zhao,Long Chen,Qingye Zhao,Xinjun Bao,Guozhong Cao,Hong-En Wang
The shuttling and sluggish conversion kinetics of lithium polysulfides (LiPSs) lead to poor cycling performance and low energy efficiency in lithium-sulfur batteries (LSBs). In this work, a hierarchically structured nanocomposite, synthesized through a surfactant-directed hydrothermal growth following dopamine-protected pyrolysis, serves as a bidirectional catalyst for LSBs. This nanocomposite comprises N -doped reduced graphene oxide (rGO) nanosheets anchored with uniformly distributed TiO 2- x nanoparticles via interfacial N -Ti and C-Ti bonding, resulting in the formation of abundant 2D/0D Schottky heterojunctions (rGO/TiO 2- x ). Density functional theory (DFT) calculations and in situ Raman characterizations demonstrate that rGO/TiO 2- x effectively inhibits the shuttling of LiPSs with enhanced redox kinetics, achieving high utilization of the sulfur cathode and improving the overall reversibility. A high areal capacity is attained at a high sulfur loading and a low electrolyte/sulfur ratio. The initial specific capacity reaches 1010 mA h g −1 at a current density of 0.2C (1C = 1675 mA g −1 ), and a retention of 86.4 % is attained over 100 cycles. A light-emitting diode (LED) screen using two LSBs with rGO/TiO 2- x demonstrates their high potential for practical applications.
研究领域:
材料科学
·
电化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zichuan Lu,Shuai Li,Changhao Zhao,Jiaguang Zheng,Danhong Shang,Fuying Wu,Liuting Zhang
Herein, a novel approach by designing Schottky-structured CoNi nano-alloys were introduced. After compositing with MgH 2 , its initial hydrogen absorption started at a low temperature of 40 °C. At a temperature of 300 °C, 6.5 wt% of H 2 was released in only 10 min. Furthermore, the kinetic analysis revealed a pivotal transformation in the control model for dehydrogenation of MgH 2 , shifted from surface penetration to diffusion at a moderate temperature of 250 °C with the introduction of CoNi-CoO@rGO. After modification, the activation energy for hydrogen de/absorption decreased from 116 kJ/mol and 79.39 kJ/mol, to 66 kJ/mol and 54.39 kJ/mol, respectively. It is noteworthy that the CoNi-CoO@rGO-modified MgH 2 exhibited excellent cycling performance, retained an impressive hydrogen storage capacity of 97% after 20 cycles at 300 °C. The innovation of this work lies in the following three aspects: 1) the uniform distribution of CoNi-CoO@rGO nanoparticles on the surface of MgH 2 significantly enhanced the contact area and promoted the catalytic activity , 2) the synergistic effect between Mg 2 Co-Mg 2 CoH 5 and Mg 2 Ni-Mg 2 NiH 4 attenuate the intensity of the Mg-H bond and quickened the post-discharge of MgH 2 , 3) the incorporation of a CoO-induced Schottky structure accelerated the H transfer in MgH 2 and improved the hydrogen absorption and release efficiency.
研究领域:
材料科学
·
氢能
·
纳米技术
·
催化
·
能量存储
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FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 2
·771-778
·
IF 2.5
Li Mengmeng,Xu Qiuyu,Jiang Wei,Farooq Amjad,Qi Yirui,Liu Lifang
Herein, Fe 3 O 4 nanoparticles and graphene oxide (GO) are compounded first, followed by the addition of cellulose nanofiber (CNF) and l -ascorbic acid, to obtain Fe 3 O 4 @reduced graphene oxide (rGO)/CNF foams via the freeze-drying method. The electrical conductivity and magnetism of as-prepared foams were improved due to the presence of rGO and Fe 3 O 4 , which is suitable for electromagnetic interference (EMI) shielding material. The results exhibit that Fe 3 O 4 @rGO/CNF foams all possess a porous structure, and the optimized foam shows an EMI shielding effectiveness value of ~ 23 dB in the X-band. The good EMI shielding performance of the Fe 3 O 4 @rGO/CNF foam originates from the synergy of its composition and structure. This work could provide a reference for the design and fabrication of novel EMI shielding materials.
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TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Qiulong Gao,Shuwen Liu,Kaiming Hou,Xiaonan Miao,Zhangpeng Li,Jinqing Wang
Environment-friendly and sustainable deep eutectic solvents (DESs) are considered as a new type of lubricant. Here, MoS x /rGO nanohybrids were prepared as lubricant additive to improve the tribological performance of DES. The nanohybrids exhibited excellent dispersibility in DES. Tribological tests indicated that the DES with 1.5 wt% of MoS x /rGO additive exhibited the best lubrication performance for steel tribopair by reducing friction (∼31.2%) and wear (∼88.2%) due to the synergistic effect between the MoS x /rGO nanohybrid and DES. The superior lubricating properties of DES containing nanohybrids are primarily due to the attachment of nanohybrids to the friction interface , which triggers the formation of a robust tribofilm. These findings provide new insights into enhancing the tribological performance of DES by incorporating effective additives.
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