JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xing Kang,Qinghua Liu,Zhihao Lu,Haonan Chen,Yingying Cai,Kun Gao,Yaning Liu,Gang Lu
Electrocatalytic hydrogen evolution reaction (HER) is a promising way to produce clean hydrogen energy. Although a variety of strategies have been developed to improve the performance of HER, it is still necessary to further develop cost-effective and efficient method for further improvement of HER performance. In this work, we proposed a novel method to further improve the HER performance of platinum (Pt) by adsorbing carefully chosen molecules on the composite of Pt and reduced graphene oxide (rGO). Typically, the molecules of methyl blue (MB) were selectively adsorbed on the surface of rGO sheets. The adsorption of MB molecules could promote interfacial charge transfer, leading to an improvement in electrocatalytic HER. After the adsorption of MB, the output current density at −0.6 V vs. RHE increased for 1.5 folds to −195 mA·cm −2 , and the overpotential at 10 mA·cm −2 decreased from −0.109 to −0.084 V vs. RHE. The improved charge transfer at interface was verified with many electrochemical measurements and theoretical calculations. Overall, this work proposes a simple and effective method to improve the electrocatalytic performance of HER, and this method could be easily and conveniently applied to many other catalytic systems.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Renxin Xu,Hongyi Luo,Zhengyi Li,Yahan Gao,Wei Zhao,Xiao Li,Wei Jin,Dan Liu
Poor microwave-absorbing performance of a carbonaceous–magnetic hybrid at low frequency is one of the great challenges that needs to be solved urgently. Constructing a three-dimensional structure of a graphene-based absorber with high-loading ferrite nanoparticles onto graphene surfaces is an effective strategy to boost the low-frequency absorbability. Therefore, we constructed substrates of crumpled monolayer graphene oxide spheres by first spray-drying and synthesized high-loading iron hydroxide nanograins onto the substrates by a simple oil-bath heating. Followed by an annealing treatment under Ar gas, an ultrahigh Fe3O4 magnetic crystals loading onto crumpled spherical reduced graphene oxide hybrid (Fe3O4@crGO) was obtained. The wrinkled architecture provides a large number of interface angles for ultrahigh Fe3O4 nanocrystals to avoid the massive agglomeration, which lowers the complex permittivity and improves the complex permeability to perfect absorber’s impedance matching at low frequency. Meanwhile, the impressive conducting loss of rGO, magnetic loss of Fe3O4 nanograins, polarization loss of heterogeneous interfaces, and multiple reflection and scattering of microwaves within the three-dimensional architecture boost the attenuation capability of the absorber. As a result, the as-prepared Fe3O4@crGO-30 hybrid exhibits a superb reflection loss of −52.3 dB at 5.4 GHz. In addition, by tailoring the thickness ranging from 2.5 to 5.0 mm, full coverage absorption in C and X bands can be achieved. This work provides a simple, efficient, and promising way to prepare a graphene-based absorber with perfect low- and middle-frequency absorption capacity.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yaqing Zhang,Zhimin Yang,Liang Zhao,Teng Fei,Sen Liu,Tong Zhang
As promising sensing materials, reduced graphene oxide (RGO)-based nanomaterials have drawn considerable attention in the fields of gas monitoring owing to their low operating temperature. However, constructing RGO-based room-temperature gas sensors possessing ppb-level limit of detection with high sensitivity remains challenging. In this work, a series of highly sensitive NO 2 sensors were fabricated using α-Fe 2 O 3 and SnO 2 co-decorated RGO hybrids (designated as α-Fe 2 O 3 /SnO 2 -RGO) as sensing materials. They were rationally synthesized by a one-pot hydrothermal method. Compared to SnO 2 modified RGO hybrids (SnO 2 -RGO with bandgap of 3.88 eV), the bandgap energy of α-Fe 2 O 3 /SnO 2 -RGO hybrids (3.53 eV) was reduced by adding α-Fe 2 O 3; the narrower bandgap facilitated the sensing materials to release more electrons and form more oxygen ions at room temperature. Besides, the high carrier migration of RGO, which served as continuous phase, identical structure with ultrasmall particle size of α-Fe 2 O 3 and SnO 2 (about 3–6 nm), and abundant chemisorbed oxygen species on the surface (20.8%) of the sensing materials, as well as their suitable bandgap (3.53 eV) in the sensing materials, significantly improved NO 2 response at room temperature. Among the sensors fabricated, α-Fe 2 O 3 /SnO 2 -RGO-15-based NO 2 sensor had the highest response of 7.4 with a short response time of 59 s towards 1 ppm NO 2 ; it could even reach a response of 2.6 towards 100 ppb NO 2 . Notably, α-Fe 2 O 3 /SnO 2 -RGO-15 sample has excellent capability to recognize NO 2 , where the response value (7.4) towards 1 ppm NO 2 is about 7 times higher than that of 100 ppm ammonia and common volatile organic compounds (formaldehyde, toluene, ethanol and acetone). Such NO 2 sensor has superior repeatability with negligible response deviation towards 1 ppm NO 2 for four reversible cycles. This makes it to have a great potential application in the field of NO 2 detection.
研究领域:
材料科学
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环境监测
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·907
·
IF 4.034
Jing Sun,Chunxiao Wang,Tingting Shen,Hongchen Song,Danqi Li,Rusong Zhao,Xikui Wang
Graphene as a two-dimensional (2D) nanoplatform is beneficial for assembling a 2D heterojunction photocatalytic system to promote electron transfer in semiconductor composites. Here a BiVO4nanosheets/reduced graphene oxide (RGO) based 2D-2D heterojunction photocatalytic system as well as 0D-2D BiVO4nanoparticles/RGO and 1D-2D BiVO4nanotubes/RGO nanocomposites are fabricated by a feasible solvothermal process. During the synthesis; the growth of BiVO4and the intimate interfacial contact between BiVO4and RGO occur simultaneously. Compared to 0D-2D and 1D-2D heterojunctions, the resulting 2D-2D BiVO4nanosheets/RGO composites yield superior chemical coupling; leading to exhibit higher photocatalytic activity toward the degradation of acetaminophen under visible light irradiation. Photoluminescence (PL) and photocurrent experiments revealed that the apparent electron transfer rate in 2D-2D BiVO4nanosheets/RGO composites is faster than that in 0D-2D BiVO4nanoparticles/RGO composites. The experimental findings presented here clearly demonstrate that the 2D-2D heterojunction interface can highlight the optoelectronic coupling between nanomaterials and promote the electron–hole separation. This study will motivate new developments in dimensionality factors on designing the heterojunction photocatalysts and promote their photodegradation photocatalytic application in environmental issues.Keywords:BiVO4;RGO;visible light;two-dimensional interface;photocatalysis
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 6
·2123-2134
·
IF 6.641
Zhen Xiang,Juan Xiong,Baiwen Deng,Erbiao Cui,Lunzhou Yu,Qingwen Zeng,Ke Pei,Renchao Che,Wei Lu
Developing electromagnetic absorption materials with a strong absorption ability and wide absorption bandwidth has attracted widespread attention in the field of electromagnetic shielding, but it still remains a great challenge. Herein, we successfully developed 2D hierarchically laminated Fe3O4@nanoporous carbon (NPC)@rGO magnetic/dielectric nanocomposites as high-performance microwave absorbers through a facile microwave-assisted approach. The rational design of the composition (Fe3O4, NPC and rGO) and the hierarchical microstructure provided the nanocomposite with a micro-scale 3D magnetic coupling network, a hierarchical dielectric carbon network and good impedance matching, which were identified by the off-axis electronic holography and electromagnetic characterization. As expected, the Fe3O4@NPC@rGO composites achieved a strong reflection loss of −72.6 dB, a matching thickness of 2.0 mm and a broad bandwidth of 5.5 GHz. Such excellent achievements encourage the development of hierarchical magnetic EMA absorbers and provide remarkable inspiration for designing high-performance microwave absorbers.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Shanshan Wu,Yefeng Feng,Kaidan Wu,Wenqin Jiang,Zhifeng Xue,Deping Xiong,Li Chen,Zuyong Feng,Kunhua Wen,Zhaoying Li,Miao He
Ti 3 C 2 /TiO 2 /rGO nanosheets were synthesized as anode materials for potassium ion batteries (KIBs) using modified Hummers, freeze drying, and thermal reduction in this paper. Layered Ti 3 C 2 /TiO 2 /rGO nanosheets were synthesized by in-situ formation of rGO and TiO 2 nanoparticles between Ti 3 C 2 layers. As one of the most important members of MXenes family, Ti 3 C 2 exhibits unique electronic characteristics, high specific surface area, strong electrical conductivity and chemically active surface, which can enhance electrode capacity. There are three ways to increase electrode conductivity and capacity: Firstly, rGO is applied as the substrate for the inlaying of TiO 2 and Ti 3 C 2 nanoparticles and nanosheets. Secondly, rGO may also buffer electrode volume changes during charging and discharging processes. In addition, the enormous surface area of rGO makes Ti 3 C 2 and TiO 2 nanoparticles dispersion well, and Ti 3 C 2 and TiO 2 nanoparticles can well separate rGO nanoparticles and prevent them from stacking up again. The synergistic effect of the three can efficiently relieve the stress and provide a rapid transport pathway between electrons and ions. The flake structure of Ti 3 C 2 /TiO 2 /rGO is advantageous to the stability of SEI film, which makes the material maintain good activity during charge and discharge process, and significantly increases its electrochemical performance. Therefore, Ti 3 C 2 /TiO 2 /rGO electrode has a high reversible capacity of 349.2 mAhg −1 after 200 cycles of 100 mAg −1 current, and a high stable capacity of 229.3 mAhg −1 after 500 cycles of 500 mAg −1 current, and has exceptional rate performance. The structure of Ti 3 C 2 /TiO 2 /rGO composite remains stable after 500 cycles, and no agglomeration occurs. The detailed reaction mechanism of Ti 3 C 2 /TiO 2 /rGO electrode as KIBs anode was analyzed by SEM, XRD , Raman, TGA , FT-IR, BET, TEM, XPS , EDS , CV, EX-situ XRD, ex-situ TEM, and so on. Therefore, it can be concluded that the Ti 3 C 2 /TiO 2 /rGO composite is an appropriate anode material for KIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 3
·1-16
·
IF 4.357
Zhao Shuangyang,Chen Chengxin,Ding Jie,Yang Shanshan,Zang Yani,Ren Nanqi
Fabrication of easily recyclable photocatalyst with excellent photocatalytic activity for degradation of organic pollutants in wastewater is highly desirable for practical application. In this study, a novel ternary magnetic photocatalyst BiVO 4 /Fe 3 O 4 /reduced graphene oxide (BiVO 4 /Fe 3 O 4 /rGO) was synthesized via a facile hydrothermal strategy. The BiVO 4 /Fe 3 O 4 with 0.5 wt% of rGO (BiVO 4 /Fe 3 O 4 /0.5% rGO) exhibited superior activity, degrading greater than 99% Rhodamine B (RhB) after 120 min solar light radiation. The surface morphology and chemical composition of BiVO 4 /Fe 3 O 4 /rGO were studied by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. The free radicals scavenging experiments demonstrated that hole (h + ) and superoxide radical (O 2 •− ) were the dominant species for RhB degradation over BiVO 4 /Fe 3 O 4 /rGO under solar light. The reusability of this composite catalyst was also investigated after five successive runs under an external magnetic field. The BiVO 4 /Fe 3 O 4 /rGO composite was easily separated, and the recycled catalyst retained high photocatalytic activity. This study demonstrates that catalyst BiVO 4 /Fe 3 O 4 /rGO possessed high dye removal efficiency in water treatment with excellent recyclability from water after use. The current study provides a possibility for more practical and sustainable photocatalytic process.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Weirong Zhou,Guoxuan Gu,Chao Liao,Yuan Gao,Jiayin Han,Dehao Kong,Yubing Gao,Zhangjun Wang,Ning Yu,Geyu Lu
Detecting trace levels of hazardous gas nitrogen dioxide (NO 2 ) at low temperatures still remains a persistent challenge. In this work, CeO 2 nanooctahedrons, nanorods and nanocubes with different exposed facets were synthesized and subsequently decorated with rGO. The NO 2 sensing properties of three CeO 2 nanocrystals-rGO nanocomposites at 65 ℃ were systematically investigated. CeO 2 nanocubes-rGO with (100) exposed plane showed superior sensing performance with eminent selectivity, long-term stability and low limit of detection (75 ppb). The results of characterizations and DFT calculations indicated the presence of abundant oxygen vacancies on (100) plane, due to the low formation energy of oxygen vacancy. Besides, the nature of polar plane and low adsorption energy on defective (100) plane promoted the adsorption of NO 2 on CeO 2 nanocubes-rGO nanocomposites. The decoration of rGO improved the electrical conductivity of CeO 2 , established the heterojunction and generated additional oxygen vacancies on the heterointerfaces. Therefore, the outstanding NO 2 sensing characters of CeO 2 nanocubes-rGO could be attributed to the polar exposed planes, abundant oxygen vacancies and plentiful interfacial heterojunctions. The present approach sheds light on the rational design of sensing materials via facet- and defect-engineering, and developed a CeO 2 -based NO 2 sensors with a low working temperature for environmental monitoring and safety assurance.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mohammed Karama Alsebaeai,Abdul Latif Ahmad,Boon Seng Ooi
In this research, the construction of a highly wetting-resistance membrane surface was achieved through an integrated dip-coating phase inversion process to accelerate water mass transfer of membrane distillation (MD). The synergistic effect of incorporating reduced graphene oxide (rGO) embedded Poly (vinylidene fluoride- co -hexafluoropropylene) (PVDF-HFP) on the surface of a PVDF hollow fiber support membrane using a dilute coating solution was studied. Various loadings of rGO nanosheets were incorporated into the dilute PVDF-HFP coating to systematically investigate its physicochemical characteristics, including surface morphology, hydrophobicity and wetting resistance which could be analyzed using scanning electron microscopy (SEM), atomic force microscopes (AFM), water contact angle (WCA), porosity measurement, pore size, x-ray diffraction (XRD), and liquid entry pressure (LEP) tests. The membrane separation performance for desalination was evaluated using direct contact membrane distillation (DCMD) process. Compared to the PVDF hollow fiber support membrane, the rGO-embedded PVDF-HFP coating layer demonstrates outstanding enhancements. The membrane surface exhibits enhanced hydrophobicity, as evidenced by an increased WCA from 105.37° (for the PVDF support membrane) to 148.37° (for the rGO/PVDF-HFP composite membrane). Additionally, the water permeability significantly improved, achieving a water flux of 25.9 kg m -2 h -1 (compared to 11.55 kg m -2 h -1 for the PVDF support membrane). These enhancements occur without compromising NaCl rejection, which remains consistently above 99.99 % (3.5 wt% NaCl aqueous solution at a feed temperature of 70 °C and a permeate temperature of 18 °C). These findings underscore the potential of rGO/PVDF-HFP in enhancing MD performance. The composite HF membrane demonstrates remarkable stability during continuous MD operation over a 48 h period. Pore wetting is effectively avoided, indicating that the composite membrane has superior resistance to wetting and excellent stability.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2024
·
IF 6.1
Xibo Lu,Qi Yu,Seyed Ali Johari,Zhuang Wang
Even though microplastics (MPs) and graphene nanomaterials (GNMs) have demonstrated individual toxicity towards aquatic organisms , the knowledge gap lies in the lack of understanding regarding their combined toxicity. The difference between the combined toxicity of MPs and GNMs, in contrast to their individual toxicities, and furthermore, the elucidation of the mechanism of this combined toxicity are scientific questions that remain to be addressed. In this study, we examined the individual and combined toxicity of three polystyrene microplastics (MPs) with different functional groups—unmodified, carboxyl-modified (COOH-), and amino-modified (NH 2 -) MPs—in combination with reduced graphene oxide (RGO) on the freshwater microalga Scenedesmus obliquus . More importantly, we explored the cellular and molecular mechanisms responsible for the observed toxicity. The results indicated that the growth inhibition toxicity of RGO, either alone or in combination with the three MPs, against S. obliquus increased gradually with higher particle concentrations. The mitigating effect of MPs-NH 2 on RGO-induced toxicity was most significant at a higher concentration, surpassing the effect of unmodified MPs. However, the MPs-COOH did not exhibit a substantial impact on the toxicity of RGO. Unmodified MPs and MPs-COOH aggravated the inhibition effects of RGO on the cell membrane integrity and oxidative stress-related biomarkers. Additionally, MPs-COOH exhibited a stronger inhibition effect on RGO-induced biomarkers compared to unmodified MPs. In contrast, the MPs-NH 2 alleviated the inhibition effect of RGO on the biomarkers. Furthermore, the presence of differently functionalized MPs did not significantly affect RGO-induced oxidative stress and photosynthesis-related gene expression in S. obliquus , indicating a limited ability to modulate RGO genotoxicity at the molecular level. These findings can offer a more accurate understanding of the combined risks posed by these micro- and nano-materials and assist in designing more effective mitigation strategies.
研究领域:
环境科学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Yan Wang,Zhiyu Zhou,Xiaofan Zhang,Zheng Liu,Huifang Lv,Xianghu Huo,Chunming Gao,Bing-Ni Gu,Yang Zhao,Zexiang Chen,Ruxiang Xu,Yu-Lun Chueh
Multicomponent transition metal heterostructures is constructed through a heteroatomic doping method sandwiched by the dual carbon layers. The promising strategy combines iron and manganese ions into a novel Fe 2.57 Mn 0.43 O 4 heterostructure on the surface of the rGO nanosheets, followed by sulfur-doping and calcination processes to achieve S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C heterostructure. Note that S 2− -doped Fe 2.57 Mn 0.43 O 4 nanorods encapsulated by the carbon coating layers on the rGO nanosheets as the backbone are expected to restrict nanorods from collapsing during the charge–discharge processes. The S 2− -doping in heterostructures can build stabilized solid electrolyte interphase on or near the surface of the Fe 2.57 Mn 0.43 O 4 nanorods. Moreover, Mn heteroatomic doping can optimize the crystalline structure of the Fe 2.57 Mn 0.43 O 4 . The exposed active sites and kinetics of S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C heterostructure are significantly improved. As a result, the as-assembled batteries can achieve a high capacitance of 1410 F g −1 at 1 A g −1 with a high capacitance retention of 75% at 16 A g −1 . Furthermore, the batteries are guaranteed a prolonged cycle life of 1000 cycles with 92.3% capacitance retention. The as-assembled NiAl-LDH (Ni-Al layered double hydroxide)//S 2− -doped-rGO@Fe 2.57 Mn 0.43 O 4 @C battery leads to excellent electrochemical properties (65.4 Wh kg −1 at 763.2 W kg −1 , 9925.8 W kg −1 at a 43.9 Wh kg −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin-ya Bu,Yan-li Zhu,Yu Xia,Bin-chao Shi,Shu Zhang,Xiao-yu Wei,Jing Luo,Yi Zhang,Ting Quan
Thermal batteries are a type of thermally activated reserve batteries, where the cathode material significantly influences the operating voltage and specific capacity of the battery. In this work, VS 4 -VO 2 has been synthesized through the hydrothermal method and used as the cathode material for thermal batteries. Firstly, the material with the VS 4 crystallinity is obtained at 170 °C and the mass percentages of VS 4 /VO 2 are 63.1 % and 36.9 %, respectively. The formation mechanism of VS 4 -VO 2 has been proposed based on in-situ ultraviolet (UV) spectrum, which shows that the hydrolysis product S 2- under alkaline conditions promotes the formation of VS 4 . To further improve the conductivity of the material, the reduced graphene oxide (rGO) has been introduced into VS 4 -VO 2 nanomaterials. When applied in thermal batteries, the rGO-VS 4 -VO 2 composite exhibits a voltage plateau of approximately 2.4 V and a discharging specific capacity of 327 mAh/g with the cut-off voltage of 1.5 V at 50 mA and 350°C, which are higher than those of VS 4 -VO 2 . Furthermore, the discharge mechanisms of rGO-VS 4 -VO 2 in thermal batteries have been analyzed, which indicates that VS 4 -VO 2 involves two processes of phase transformation, including the intercalation process and conversion process. The results confirm rGO-VS 4 -VO 2 as a promising cathode material for thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）