JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 25
·1-15
·
IF 2.8
Yan Yuefeng,Cheng Ziyan,Ma Guansheng,Chen Tao,Gao Boshi,Liu Yuhao,Huang Xiaoxiao
Reduced Graphene Oxide (RGO) has been proved to be a promising electromagnetic wave absorption (EMWA) material candidate owing to its superior electrical and dielectric properties, along with rich potential for structural design. However, the complicated synthesis process and the contradiction between impedance matching and attenuation capacity have hindered the further development and application of graphene-based absorbing materials. Herein, a Fe nanoparticle/RGO composites was synthesized through a facile in-situ chemical reduction process. The configuration of Fe nanoparticles regulates the permittivity and permeability of RGO and balances the impedance matching. The dipole polarization caused by the residual oxygen-containing functional groups in RGO, coupled with the interfacial polarization loss caused by the Fe/RGO interface, enhance the dielectric loss capacity, contributing to microwave loss in the high-frequency range. The natural resonance and exchange resonance caused by the nano Fe particles enhance the microwave loss capacity in the low-frequency range. Benefitting from the synergistic enhancement from dielectric loss and magnetic loss, Fe/RGO composites exhibit the characteristic of daul-band absorption. Notably, the sample FG-0.25 achieved an effective absorption bandwidth ( EAB ) of 5.33 GHz and a minimum reflection loss ( RL min ) of −48.9 dB. The absorption peaks in the low-frequency band can encompass a significant portion of the C-band. This research provides unique insights for the advancement of environmentally friendly and energy-efficient RGO based EMWA materials.
研究领域:
材料科学
·
电磁波吸收
·
纳米复合材料
·
微波吸收材料
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 9
·1720
·
IF 2.467
Qiuyan Hao,Guoliang Cui,Yuan Tian,Taizhe Tan,Yongguang Zhang
In this paper, the synthesis of the three-dimensional (3D) composite of spherical reduced graphene oxide (RGO) with uniformly distributed CeO2particles is reported. This synthesis is done via a facile and large-scalable spray-drying process, and the CeO2/RGO materials are hydrothermally compounded with sulfur. The morphology, composition, structure, and electrochemical properties of the 3D S/CeO2/RGO composite are studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), Raman spectra and X-ray photoelectron spectroscopy (XPS), etc. The electrochemical performance of the composites as electrodes for lithium–sulfur batteries is evaluated. The S/CeO2/RGO composites deliver a high initial capacity of 1054 mAh g−1, and retain a reversible capacity of 792 mAh g−1after 200 cycles at 0.1 C. Profiting from the combined effect of CeO2and RGO, the CeO2/RGO materials effectively inhibit the dissolution of polysulfides, and the coating of spherical RGO improves the structural stability as well as conductivity.Keywords:Lithium–sulfur battery;CeO2/RGO composite;electrochemical performance
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 35
·13957-13973
·
IF 4.5
Xu Kaizheng,Ma Yingyi,Yao Shun,Liu Xiaoting
The fabrication and functionalization of three-dimensional (3D) MXene are vital for diverse high-performance applications. Herein, the construction of 3D porous MXene architecture and its functionalization with graphene are synchronously implemented by breath figure method. 3D porous rGO/MXene with multi-scale pores is prepared by simply casting the mixture of GO/surfactant and MXene/surfactant solution under humid environment and the subsequent reduction process. The aggregation inhibition of GO and MXene nanosheets at multi-scale caused by surfactant intercalation and the formation of 3D porous structure, as well as the increase in surface area induced by the introduction of GO, enlarged lamellar spacing and multi-scale porous structure endow porous rGO/MXene with excellent electrochemical performance. The synergy of rGO and MXene leads to further improvement in electrochemical property and its stability. Low detection limit, good anti-interference, repeatability, reproducibility, long-range stability and accuracy of actual sample testing are exhibited when porous rGO/MXene is used for electrochemical detection of DA. Furthermore, the electrochemical performance could be controlled via tuning the porous structure and ratio of GO and MXene. This study not only demonstrates the superiority of porous rGO/MXene toward electrochemical sensing, but also proposes a simple and universal method for controllable construction and functionalization of 3D MXene architecture. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 26
·15033-15041
·
IF 3.049
Ya Gao,Yongjie Zheng,Jixing Chai,Jingzhi Tian,Tao Jing,Deqing Zhang,Junye Cheng,Huiqing Peng,Bin Liu,Guangping Zheng
Effective separation and rapid transfer of photogenerated electron–hole pairs are key features of photocatalytic materials with high catalytic activity, which could be achieved in co-catalysts. It is reported that the two-dimensional (2D) MoS2 is a promising co-catalyst due to its unique semi-conductive properties and graphene-like layered structure. However, the application of MoS2 as a co-catalyst is limited by its poor electrical conductivity. On the other hand, it is worth noting that TiO2 possesses reactive crystal facets, which is one of the dominant mechanisms for the separation of photogenerated electron–hole pairs. In this work, we prepared MoS2/RGO hybrids as co-catalysts which were doped to TiO2 with highly reactive {001} planes via the hydrothermal method. It was found that the {001}-TiO2/MoS2/RGO photocatalysts with 7 wt% MoS2/RGO co-catalyst show the highest photodegradation activity for the degradation of Rh B under visible light irradiation (λ > 400 nm), which could result from the synergy of the effective separation of electron–hole pairs by the {001} facets in TiO2 and the rapid transfer of electron–hole pairs in MoS2/RGO. The results show that the {001}-TiO2/MoS2/RGO hybrid is a low-cost and stable photocatalyst for the effective degradation of Rh B under visible light.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ronghao Wu,Qu Zhang,Chao Xue,Zuliang Chen
17beta-estradiol (E2) is classified as an endocrine disruptor and it poses a significant threat to the environment. Despite our previous work on the preparation of green-reduced graphene immobilized Ochrobactrum sp. FJ1(FJ1@rGO) to achieve high efficiency in removing E2, the functions of strain FJ1 and rGO, as well as their removal mechanism of E2, remain not well understood. In this study, FJ1@rGO was used to remove E2 to comprehend the removal mechanism where efficiency was found to be 93.74% after 10 days of removal compared to only rGO (43.82%). This indicated that E2 degradation was based on the integration of adsorption using rGO and biodegradation through strain FJ1, as evidenced by HPLC-UV. Additionally, results confirmed that the E2 removal process by FJ1@rGO conforms to first-order degradation kinetics and pseudo-second-order kinetics, further demonstrating the synergistic effect of physical adsorption and biodegradation. LC-Q/TOF-MS analysis identified the primary degradation products as estrone (E1), 4-OH-E1, and catechol. Combining characterization analysis, rGO facilitates the transfer of electrons between cells and E2, improving the strain's tolerance of environmental changes. Finally, the assessment of various wastewaters showed that the removal efficiency was 99.76%, 96.89%, and 78.09%, respectively. Overall, the mechanism by FJ1@rGO to remove E2 was proposed here, providing new insights into green and sustainable technology for treating E2 in wastewater.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Lin Yu,Jingyuan Liu,Wenyan Yin,Jing Yu,Rongrong Chen,Dalei Song,Qi Liu,Rumin Li,Jun Wang
Ionic liquids are promising electrolytes for electrochemical gas sensors that have unique physicochemical properties such as negligible vapor pressure and high thermal stability. The modification of ionic liquid (IL) by combining metal oxide with reduced graphene oxide (rGO) is an effective method to improve its gas-sensing properties. In this study, the mesoporous structure of NiCo 2 O 4 /rGO is synthesized by simple one-step method, and the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) is mixed with it to form the composite material NiCo 2 O 4 /rGO/[BMIM][PF 6 ]. Electrochemical test results indicate that the three electrolytes exhibit response current and long-term stability in the oxygen environment. The oxygen sensor based on NiCo 2 O 4 /rGO/[BMIM][PF 6 ] significantly improves the response current and working stability of pure ionic liquid. The sensitivity of the sensor is 0.1087 μA/[%O 2 ], and the linear regression coefficient of the reduction peak current calibration curve is 0.9995. After continuous cyclic voltammetry , the reduction peak current remains at 90% of the initial current value. The interaction of IL and NiCo 2 O 4 /rGO significantly enhances electrochemical oxygen sensing performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2023
·
IF 4.4
Song-Lan Zhang,Cheng Qing,Rui Zhang,Si-Qi Wu,Zi-Heng Xu,Yi-Han Wang,Kai Du,Qin-Jian Yin
Graphene oxide/ carbon nanotubes (GO/CNTs) aerogels were prepared by adjusting the proportion of GO and CNTs, the corresponding reduced graphene oxide/CNTs (rGO/CNTs) aerogels were obtained by thermal reduction. Then, poly (3,4-ethylenedioxythiophene): polystyrene sulfonic acid (PEDOT: PSS) was compounded with rGO/CNTs aerogels at a mass ratio of 1:1 to prepare rGO/CNTs/PEDOT: PSS (GCP) composites. Structural analyses revealed the strong π-π interaction between rGO/CNTs and PEDOT: PSS, which leads to the formation of ordered regions. Porous structures of rGO/CNTs aerogels act as conductive network skeleton to promote carrier transport in GCP composites, and the electrical conductivity of GCP composites improves effectively. The optimal electrical conductivity and Seebeck coefficient of GCP5 were 1788.11 S cm −1 and 15.87 μV K −1 respectively. The maximum power factor and ZT merit of GCP5 achieved to 45.03 μW m −1 K −2 and 2.65 × 10 −2 at room temperature, which was almost 43 and 17 times than that of PEDOT: PSS.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Teng Zhou,Xiao Zhan,Kunlan Diao,Jiajia Du,Yuhuan Xu,Jingyu Du,Renyuan Yang,Shuhao Qin,Daohai Zhang
With the continuous development of electronic products, polymers with EM shielding have received widespread attention. In this study, Fe 3 O 4 @RGO was prepared by the hydrothermal synthesis method, which solved the problems of Fe 3 O 4 precipitation and RGO stacking. Using it as a precursor, Fe 3 O 4 @RGO/PAM conductive hydrogel was prepared. The research shows that the conductivity of this hydrogel reaches 16.2 S/m at a thickness of 0.3 cm, and the maximum EMI SE is 27.1 dB. Among them, RGO can form a conductive framework, and Fe 3 O 4 can optimize the impedance matching and provide additional magnetic loss. The combined effect of the two makes the hydrogel have excellent EMI SE. In addition, PAM-based hydrogels have good thermal stability, crystallinity, water content, and mechanical properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 14
·2692-2701
·
IF 5.958
Shuangshuang Kai,Baojuan Xi,Haibo Li,Shenglin Xiong
Z-scheme photocatalytic systems, consisting of semiconductor/semiconductor heterostructures, mimic the natural photosynthesis and enhance the photocatalytic activity dramatically. Herein, we have for the first time synthesized unique all-solid-state Z-scheme ternary heterostructures by growing CdS nano-hemispheres radially assembled with nanorods as the core and CoS hexagonal nanoflakes as the shell on graphene sheets (CdS/Co9S8-RGO) through a facile one-pot hydrothermal method and subsequent annealing treatment. Furthermore, the growth mechanism is explored and analyzed by monitoring the intermediates in terms of structure and composition. The heterostructures form three paths available for charge carrier transfer and separation, wherein a redox-mediator-free Z-scheme constitutes CdS and Co9S8 and upgrades to an all-solid-state Z-scheme system by combination with RGO. Moreover, due to the excellent photon capture capability and electric conductivity, RGO also made great contribution to the effective separation and transfer of photogenerated carriers. Benefiting from efficient charge transfer and separation, CdS/Co9S8-RGO exhibits a H2 evolution rate up to 4.82 mmol h−1 g−1 and remarkable activity stability even after 20 h of photocatalytic reaction. We believe that the design philosophy via the plain synthesis merges multiple structural interfaces and transfer paths in a system reported here, shedding an insight into the design of other photocatalysts.
研究领域:
材料科学
·
能源化学
·
光催化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Xiaodong Cai,Qun Song,Danhua Jiao,Huatong Yu,Xia Tan,Rongrong Wang,Shengyun Luo
Bifunctional non-precious electrocatalysts with high performance are highly desired for renewable energy but remain challenging. Herein, a CoFeP/rGO heterostructure was rational developed based on the synergistic effect , including superior conductivity, increased catalytic active sites of rGO support and the regulated electron distribution of bimetallic phosphide. At a current of 10 mA cm −2 , the CoFeP/rGO-2 composite exhibits excellent HER activity with low overpotentials of 101 mV and 76 mV in 1.0 M KOH and 0.5 M H 2 SO 4 electrolyte, respectively. And highly active alkaline OER performance was provided with an overpotential of only 275 mV to reach a current density of 10 mA cm −2 . By the way, the CoFeP/rGO-2 electrode showed a pleasured working voltage of 1.58 V for overall water splitting in alkaline environment . More importantly, the long term durability and higher stability of the catalysts demonstrated their feasibility of bimetallic phosphide/rGO system as bifunctional electrocatalysts.
研究领域:
材料科学
·
可再生能源
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Ruijie Yang,Kelin Song,Jiansheng He,Yingying Fan,Rongshu Zhu
In this work, the study of photocatalytic hydrogen production by RGO/ZnIn2S4 with simultaneous degradation of organic amines was carried out in the presence of organic amines in wastewater as the sacrificial agents. The effects of several factors, such as organic amine types, pH value, catalyst concentration, organic amine concentration, and sunlight source, on the photocatalytic activity of RGO/ZnIn2S4 for H2 production were investigated. At the same time, its performance of degrading organic amines during H2 production was also examined. The results showed that the order of H2 production activity of RGO/ZnIn2S4 in six organic amine solutions was N(CH2CH3)3 > N(HOCH2CH2)3 > N(CH3)3 > HO(CH2)2NH2 > C6H5–N2> CO(NH2)2, and the highest H2 production was in N(CH2CH3)3 (triethylamine) solution, being 1597 μmol·g–1·h–1, which is 2.6 times as high as that using the aqueous solution mixture of Na2S and Na2SO3 as the sacrificial agent. In addition, when the pH was 13, the catalyst concentration was 1.0 g·L–1, and the triethylamine concentration was 1.0 mol·L–1, the photocatalytic activity was the highest. Furthermore, the relationship between triethylamine concentration and H2 production was analyzed according to the theory of dynamics.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 6
·833
·
IF 4.034
Zhi Zhang,Qi Lv,Yiwang Chen,Haitao Yu,Hui Liu,Guangzhen Cui,Xiaodong Sun,Ling Li
To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.Keywords:graphene;polypyrrole;sandwich-like structure;electromagnetic absorption
研究领域:
材料科学
·
电磁学
✓ 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）