JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Ma Junjie,Li Wei,Yang Deyi,Liu Zheng,Cao Yuyuan,Wang Shaocong,Han Guo-Cheng,Chen Qizhi
N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were prepared by sol–gel method combined with high-temperature calcination at 625 °C. Electrochemical tests show that the initial discharge specific capacity of N-RGO/Na 3 V 2 (PO 4 ) 3 -modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites is 149.27 mAh·g −1 at a current density of 0.05 C, and the discharge specific capacity can be maintained at approximately 101.89 mAh·g −1 after 100 cycles. This accounts for 68.26% of its initial discharge specific capacity. Rate performance tests showed that after cycling the current density back to 0.2 C, it was still able to recover to a discharge specific capacity close to 119 mAh·g −1 . At the same time, the interfacial properties of the N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites were studied, and it was found that the capacity attenuation was due to irreversible structural changes such as agglomerated block cracking and structural collapse during multiple cycles, as well as the gradual thickening of the SEI film with the increase in cycle times. This study aims to apply N-RGO/Na 3 V 2 (PO 4 ) 3 dual-modified Na 2 Fe 0.6 Mn 0.4 PO 4 F composites to cathode materials for sodium-ion batteries, providing a theoretical basis for the development of fluorinated poly-anion compounds.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dongju Liu,Kunlan Diao,Daohai Zhang,Yupeng Hu,Zhi Lei,Teng Zhou,Kaixiang Zou,Shuhao Qin
With the popularity of wireless communication technology, the problem of electromagnetic radiation and interference is highlighted, and the development of efficient electromagnetic shielding materials has become a research priority. In this study, firstly, polyvinyl alcohol/sodium alginate (PVA/SA) hydrogels were prepared by physical cross-linking method, and further, iron-based metal-organic frameworks (Fe-MOFs) were prepared by solvothermal synthesis method, and with reduced graphene oxide (RGO) as a conductive filler, and γ-aminopropyltriethoxysilane (KH550) as a cross-linking agent, were prepared by chemical cross-linking method. Modified polyvinyl alcohol/sodium alginate/iron based metal organic framework/reduced graphene oxide (PVA/SA/Fe-MOF/RGO-KH550) composite hydrogel. The results show that the composite hydrogel has a compressive stress of 20.13 MPa, a compressive strain of 83.28 %, and an electromagnetic shielding efficiency of 39.98 dB at a thickness of 3 mm, which reaches the mid-range and high-end level, and it can be applied to industrial control, small and medium-sized data centres, automotive electronics, and general medical devices with medium-high requirements. The excellent performance of the hydrogel comes from the conductive properties and interfacial polarisation effect of RGO, the dielectric loss of Fe-MOF, which work in synergy, and KH550 optimises the interfacial bonding between the filler and the substrate to form a denser crosslinked structure, which strengthens the mechanical properties and electromagnetic shielding effect. The hydrogel preparation process is simple and low-cost, which provides a reference for the design of high-performance electromagnetic shieldingmaterials and an effective solution to the problem of electromagnetic interference.
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高影响因子
Small
·
2023
·Vol. 20
·期 4
·2306071
·
IF 13.3
Guoqing Zhao,Xiaorong Yan,Yujie Dai,Jiakui Xiong,Qian Zhao,Xinyu Wang,Haiping Yu,Jiefeng Gao,Naibo Zhang,Mingjun Hu,Jun Yang
The lack of acid-proof high-potential cathode largely limits the development and competitiveness of proton batteries. Herein, the authors systematically investigated six dihydroxynaphthalenes (DHNs) and found that 2,6-DHN delivered the best cathode performance in proton battery with the highest redox potential (0.84 V, vs SHE) and a specific capacity of 91.6 mAh g −1 at 1 A g −1 . In situ solid-state electropolymerization of DHNs is responsible for the voltage and capacity fading of DHNs, and 2,6-DHN's excellent electrochemical performance is derived from its high polymerization energy barrier. By compounding with rGO, the 2,6-DHN/rGO electrode can maintain a specific capacity of 89 mAh g −1 even after 12 000 cycles at 5 A g −1 . When it is paired with the 2,6-dihydroxyanthraquinone (DHAQ) anode, the assembled rocking-chair all-organic proton battery exhibited a high cell voltage of 0.85 V, and excellent energy/power densities (70.8 Wh kg −1 /850 W kg −1 ). This study showcases a new-type high-potential proton-containing organic cathode and paves the way for constructing a high-voltage rocking-chair proton battery. Also, in situ solid-state electropolymerization will inspire the further study of phenol-based small-molecule electrodes.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Ni,Xiaolin Chen,Jie Yan,Jin Zhang,Zhou Yang,Dalong Yang,Renguo Guan
Graphene, due to its unique mechanical properties, thermal conductivity and electrical conductivity, is considered as a reinforcement for metal materials. However, there are still issues with graphene aggregation and weak bonding at the graphene/metal interface. In this study, in-situ reduction techniques by nascent hydrogen was used to reduce graphene oxide (GO), and reduced graphene oxide (rGO) coated the Al powder to prepare composite powder. The composite powder was pre-shaped into blocks by hot-press sintering and the interface bonding issue of rGO/Al was improved by multi-pass rolling processes. Raman spectroscopy and XPS were used to analyze the reduction of GO. SEM, HRTEM and EBSD were used to analyze the composition, structure, and morphology of composites. The mechanical properties of the composite materials were studied. The results showed that GO was reduced to that almost all oxygen-containing groups were removed and uniformly dispersed in the Al matrix. The microstructure of the composites was dense, with good metallurgical bonding, and no apparent defects or porosity. When the loading amount is below 0.20 wt%, the ultimate tensile strength ( UTS ), yield strength ( YS ), and Young's modulus ( E ) were increasing along with the increased rGO content. When the addition amount was 0.20 wt%, UTS (147.67 MPa), YS (126.83 MPa), and E (36506.37 MPa), of the rGO/Al composites increased by 51.89 %, 37.87 %, and 94.48 %, compared to pure Al produced using the same process.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Hao Lu,Shengtao Zhang,Zhiheng Zhao,Yang Zhou,Weihua Li
In this paper, VB 2 had been added to modify the simple oligoanilines integrated with rGO for further improving the corrosion protection properties. Trimer aniline (TA) had been synthesized to fabricate a novel composite with rGO after functionalized with VB 2 . Through the combination of VTA and rGO, enhanced electrical properties were discovered, which were attributed to the graphitic structure and the π-π* interactions between rGO and VTA. As a result, VTA-rGO composite provided excellent barrier performance against corrosive electrolyte diffusion and owned better corrosion protection properties than TA and VTA individually, with the combination of VTA and rGO.
研究领域:
材料科学
·
腐蚀与防护
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2016
·
IF 4.425
Zhensheng Hong,Kaiqiang Zhou,Junwen Zhang,Zhigao Huang,Mingdeng Wei
With the aim of enhancing the electrochemical kinetics and capacity of the TiO2 electrode for Na ion batteries (NIBs), we have designed a hybrid material of carbon-coated TiO2 mesocrystals anchored on reduced graphene oxide (TiO2@C-rGO). Such hybrid nanostructures are fabricated through a facile one-step route including in situ growth of oriented self-assembly of TiO2 mesocrystals on GO. TiO2@C-rGO possesses a very large surface area (279 m2 g–1), mesoporous nature, and single-crystal-like structure. It is also found that the capacity of TiO2 electrode for NIBs could be improved by carbon coating at a low current rate, but pure TiO2 shows better rate performance than that of TiO2@C. Remarkably, the enhanced electrochemical kinetics and large capacity can be simultaneously achieved by designing hybrid material. The hybrid nanostructures exhibit a highly reversible capacity of 300 mAh g–1 at 100 mA g–1, superior rate capability, and long-term cycling stability (a stable capacity of 159 mAh g–1 can be maintained after 1000 cycles at 1 A g–1). The superior Na ion storage of TiO2@C-rGO is largely ascribed to the robust architecture of well-dispersed carbon-coated mesoporous TiO2 mesocrystals anchored on conductive graphene network, leading to enhanced electrochemical kinetics and offering enough active sites for the Na ion to locate.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
电化学
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DOI
高影响因子
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
·
2021
·
IF 4.32
Xiao Zhou,Min Zhou,Shengjun Ye,Yanbin Xu,Shaoqi Zhou,Qiujie Cai,Guangyan Xie,Lu Huang,Li Zheng,Yuxin Li
The antibacterial activity and mechanism of reduced graphene oxide (rGO)-modified TiO 2 were assessed against Enterobacter hormaechei in this study. The rGO-modified TiO 2 exhibited an enhanced antibacterial activity against E. hormaechei under UV–Visible light irradiation compared with individual TiO 2 or rGO alone. Its effectiveness owed to the synergistic effect of the improved adsorption and the lower recombination of photo-induced electron–hole pairs. The hybrid photocatalyst improved charge separation and chemical binding activity that contributed to accelerated antibacterial process. The flow cytometry results showed that the hybrid photocatalyst reduced the survival ratio of E. hormaechei to about 10% with 90 min under visible light illumination. The XPS spectra and SEM micrographs indicated a direct physical contact and disruptive interaction between the bacteria and the rGO-TiO 2 catalyst, mostly on rGO, resulting in oxidizing a vital cellular structure. EPR measurement revealed that hydroxyl radicals were the dominant active species that can cause the peroxidation of lipids in the outer cell wall and the damage of cell organelles and components inside the bacteria, which is the key mechanism for this antibacterial process. Overall, this study indicated that rGO-modified TiO 2 nanocomposite has great potential as an economical, environmentally friendly and easily available antibacterial material for antibacterial.
研究领域:
材料科学
·
纳米技术
·
环境科学
·
微生物学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Yuhui Li,Enze Zhu,Juan Yu,Jie Yu,Jirong Yang,Weiping Liu,Xiaoyin Cui,Xikun Yang,Yingjie Zhang,Mingli Xu
A novel carbon fiber paper loaded with reduced graphene oxide (rGO) was used as the substrate, on which Pt–Ni nanoparticles were electro-deposited as to prepare an integrated electrode by two electrochemical methods (cyclic voltammetry and square wave pulse). The electrochemical tests indicated two integrated electrodes had excellent performance towards methanol oxidation . Especially, Pt-Ni-CV(A)-rGO/CFP electrode showed the highest electrocatalytic activity , and mass activity reached 5.33 A·mg −1 Pt , which was about 5.6 times that of the commercial Pt/C catalyst (JM). Further, after annealing under a reducing atmosphere, two electrodes exhibited completely different changes in the aspects of morphology and electrocatalytic performance. It can be attributed to the changes of element distribution and morphology of nanoparticles after annealing. The as-prepared Pt–Ni-rGO/CFPs composite electrode is promising for integrated electrode of proton exchange membrane fuel cells. This work opens an avenue for the preparation of high-performance integrated electrode.
研究领域:
材料科学
·
电化学
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高影响因子
Nanoscale
·
2019
·Vol. 11
·期 12
·5571-5579
·
IF 6.97
Shuangshuang Kai,Baojuan Xi,Denghu Wei,Shenglin Xiong
It is well known that efficient charge separation is a crucial factor for the enhancement of photocatalytic activity for hydrogen evolution, and the internal electric field is commonly designed to improve charge separation. The microstructure of a catalyst has a significant effect on the photocatalytic and photoelectrochemical (PEC) performance. Herein, two samples are engineered with similar morphology but different crystal structures. Small wurtzite (WZ)/zinc blende (ZB) -Cd0.6Zn0.4S nanorods are featured with dense type-II homojunctions. By utilizing the excellent thermal conductivity of graphene to eliminate thermal fluctuations, WZ-Cd0.6Zn0.4S/RGO is obtained by anchoring Cd0.6Zn0.4S nanorods on the graphene sheets. The elongated WZ/ZB-Cd0.6Zn0.4S nanorods with an internal electric field formed by the heterophase homojunction greatly improve the photocatalytic hydrogen production rate to 36.33 mmol h−1 g−1, much higher than that of WZ-Cd0.6Zn0.4S-RGO. On the contrary, WZ-Cd0.6Zn0.4S/RGO shows superior photoelectrochemical performance under an external electric field, benefiting from the excellent electric conduction and the 2D network of RGO as electron transportation channels. The study strategy and synthetic route for the Cd0.6Zn0.4S nanorods with a homojunction and a homogenous structure in our work may open up new avenues for the fabrication of other semiconductor materials with distinctive photocatalytic and PEC applications.
研究领域:
材料科学
·
能源科学
·
纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Haopeng Cai,Chaochao Feng,Hongbo Xiao,Bo Cheng
Due to the pressing need for electromagnetic interference and radar stealth, microwave absorbers have garnered considerable attention. Through chemical co-precipitation and in-situ polymerization, we synthesize a ternary composite containing reduced graphene oxide , Fe 3 O 4 with flower-like nanostructures , and polyaniline (PANI). To fine-tune the impedance matching and corrosion resistance of composite materials, the conductive PANI was densely coated on the surface of reduced graphene oxide (rGO)/flower-like Fe 3 O 4 (f-Fe 3 O 4 ). The ternary composite exhibits excellent microwave absorption performance. In comparison to rGO/f-Fe 3 O 4 (1:10), which has a minimum reflection loss (RL min ) of −32.81 dB at 10.61 GHz and a 5.15 GHz effective absorption bandwidth (EAB) (7.34–12.49 GHz), rGO/f-Fe 3 O 4 (1:10)@PANI has an RL min of −46.49 dB at 9.93 GHz with a 2.5 mm thickness and an EAB of 4.25 (8.90–13.15 GHz). The results indicate that the addition of the PANI anticorrosion coating layer has no discernible effect on the final microwave absorption performance. This article also examines the effect of rGO weight ratio on microwave absorbing properties. When the rGO content is too high, the impedance will be mismatched, while the too low rGO content will affect the absorbing performance. This research work has contributed to our present understanding of the structure design and composition control of microwave absorbers.
研究领域:
材料科学
·
电磁学
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 6
·期 3
·963-971
·
IF 8.867
Yuchao Wang,Canzhu Wang,Xiangju Song,Suresh Kumar Megarajan,Heqing Jiang
Solar-driven water evaporation assisted by photothermal membranes is considered as one of the sustainable and cost-effective strategies for pure water generation and wastewater treatment. Herein, we report a facile but effective approach to improve the photothermal performance by combining 2D reduced graphene oxide (rGO) and 1D multi-walled carbon nanotubes (MWCNTs), which have different nanomorphologies. The photothermal layer can be easily deposited on different substrate materials via simple vacuum assistance. Such a composite photothermal layer shows a rough surface with a controllable nano-structure, which can thus optimize solar light harvesting. On the other hand, the formation of a loose internal porous structure and suitable wettability ensure water transport inside the photothermal layer during evaporation. The surface temperature reaches as high as 78 °C even under one sun irradiation (1 kW m−2), which is 10 °C higher than the result of pure rGO membranes. When loaded on a PVDF substrate, the rGO–MWCNT based membrane is flexible and shows an obvious improvement in the evaporation rate, about 79.0% and 8.9% higher than those of pure rGO and MWCNT membranes, respectively. The solar thermal conversion efficiency can reach up to 80.4% without any extra accessory for thermal management. Based on our results, the nanocomposite strategy is facile and effective for the development of novel photothermal membranes for high-efficiency evaporation, and contributes to the widespread application in the fields of desalination and wastewater treatment.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Peikai Luo,Zhibin Mao,Guangqi Xu,Ke Sun,Yu Cao,Pei Li,Wenwen Liu
In this study, a PWF/rGO@PVA photocatalytic membrane with high stability and reusability was successfully prepared by employing a blending-coating method. Through the innovative introduction of high thermal conductivity rGO, the membrane achieved enhanced photothermal conversion, which facilitates molecular diffusion and reduces reaction energy barriers. Simultaneously, rGO acts as an electron bridge to promote charge separation and suppress carrier recombination. With an optimal photocatalyst content of 5 wt%, the PWF/rGO@PVA membrane exhibited excellent degradation rates of 0.0112 min⁻¹ and 0.0101 min⁻¹ under UV and visible light respectively, and maintained over 70% removal efficiency after five cycles. Selective laser texturing was then applied to the membrane surface, achieving degradation rates of 96.7% and 93.6% under UV and visible light respectively, and maintained over 90% removal efficiency after five cycles. On one hand, the created periodic microstructures increased specific surface area which provided additional adsorption sites and reaction interfaces and significantly enhanced the anti-reflective properties of the membrane surface. On the other hand, the laser texturing process disrupts the hydrogen bonding network of PVA, thereby suppressing warpage deformation during photocatalytic cycling and improving structural stability. Finally, the dynamic water experiments verified that at a flow rate of 1.0 mL/min, the photocatalytic membrane retained over 80% degradation efficiency and maintained high photocatalytic stability in dynamic water environments with varying pH and the presence of inorganic anions.
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