CARBON
·
2019
·
IF 7.466
Rui Zou,Feng Liu,Ning Hu,Huiming Ning,Shu Wang,Kaiyan Huang,Xiaoping Jiang,Chaohe Xu,Shaoyun Fu,Yuanqing Li,Cheng Yan
Nacre like graphene based composite films (GCFs) have been developed over the last decade. Although the progress in ultrastrong GCFs is remarkable, fabricating GCFs with excellent integrated properties of strength, flexibility, and toughness still remains a challenge. Here, a ternary GCF of reduced graphene oxide (rGO), polydopamine (PDA) and multi-walled carbon nanotubes (MWCNTs) was developed. The MWCNTs were modified by PDA to form PDA@MWCNTs which were then compounded with GO to fabricate the rGO-PDA@MWCNT films by evaporation-induced assembly and chemical reduction. The preparation was simple, cheap and environmentally-friendly. The PDA increased the dispersion of MWCNTs in the rGO-PDA@MWCNT films, crosslinked the rGO sheets, and enhanced the entanglement of MWCNTs and the interactions between MWCNTs and rGO sheets. Benefiting from the synergistic effect of PDA and MWCNTs, the rGO-PDA@MWCNT films exhibited excellent integrated properties by increasing strength, tensile fracture strain and toughness to 579 ± 35 MPa, 12.03 ± 0.56%, and 34.03 ± 1.60 MJ/m 3 , which were 2.26, 2.02 and 4.94 times that of pure rGO films, respectively. The rGO-PDA@MWCNT films also exhibited a high conductivity of 612 ± 68 S/cm and excellent structural stability under extreme environments. These excellent integrated properties of the rGO-PDA@MWCNT films will promote their applications in aerospace engineering, flexible electrical devices and artificial muscle.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 15
·3032
·
IF 4.967
Zaiming Lin,Yihan Chen,Zhuang Ma,Lihong Gao,Wenhua Chen,Guohua Chen,Chen Ma
Localized heat sources, such as flame guns and high-energy lasers, can cause severe damage to conventional materials. In this study, a novel localized heat-resistant coating with a high in-plane thermal conductivity was designed and prepared. Reduced graphene oxide (rGO) effectively improved the in-plane thermal conductivity of the polyvinyl alcohol (PVA) film, while maintaining the thermal insulation of the resin matrix in the through-plane direction. This characteristic of the rGO/PVA film was combined with the thermal insulation of boron-modified phenolic resin (BPF), and the prepared composite coating with two layers of rGO/PVA films effectively lowered the back-surface temperature in the flame ablation test from 151 to 107 °C. In addition, the area of the ablation-affected region of coating was increased to 103.6 cm2from 31.9 cm2, indicating an excellent heat transfer performance. The layer-by-layer structure could realize the compatibility of high in-plane thermal conductivity and good through-plane thermal insulation. The synergy of these two different characteristics is demonstrated to be the key to improving the localized heat-resistant performance of the composite coating. This study effectively expands the application range of high-conductive film, and the obtained coating could act as a shield against butane flame, high energy lasers, and other localized heat.Keywords:composite coatings;localized heat;reduced graphene oxide;high thermal conductivity
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·1261
·
IF 3.4
Qian Wang,Yuzhe Wang,Guiyong Xiao,Xinde Zhu
In this work, the facile fabrication of Co3O4particles/reduced graphene oxide (Co3O4/rGO) composites on Indium tin oxide (ITO) slide was achieved by an electrophoretic deposition and annealing process. The deposition time and ratio of the precursors were optimized. Structural characterization and chemical composition investigation indicated successful loading of Co3O4particles on graphene sheets. When applied as a non-enzymatic H2O2sensor, Co3O4/rGO showed significant electrocatalytic activity, with a wide linear range (0.1–19.5 mM) and high sensitivity (0.2247 mA mM−1cm−2). The good anti-interference ability, reproducibility, and long-term stability of the constructed sensor were also presented. The application of Co3O4/rGO in real sample analysis was evaluated in human urine sample with satisfactory results, indicating the feasibility of the sensor in physiological and medical applications.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry A
·
2023
·Vol. 97
·期 4
·714-721
·
IF 0.7
Han Jingliang,Chen Lian,Xu Zhengkai,Zhu Chengfei
Abstract Carbon steel was the most widely used grounding metal material. Polyaniline(PANI)/reduced graphene oxide (rGO) composite coating was prepared on carbon steel to optimize its performance by cyclic voltammetry for the first time in mixed solution of oxalic acid, aniline and rGO in this article. The structure and morphology of polyaniline were characterized by FTIR, XRD, and SEM. The effects of rGO doping on the conductivity and corrosion resistance of polyaniline were studied by polarization curve method and four probe method. The results showed that the PANI/rGO coating was successfully prepared on the surface of carbon steel. The PANI was continuously and densely covered on the surface of rGO as villous to reduce the porosity of the coating and improve the conductivity and corrosion resistance of the coating. The conductivity of the PANI coating increased from 3.33 to 23.05 S/cm after doping 10% rGO. The self-corrosion current density of PANI/rGO composite coated carbon steel in the soil decreased from 1.21 × 10 –3 to 5.19 × 10 –4 A/cm 2 and the corrosion inhibition efficiency was 57.1%.
研究领域:
材料科学
·
电化学
·
防腐蚀工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Chunyu Yuan,Huijun Lv,Yujin Zhang,Qian Fei,Dongdong Xiao,Hongfei Yin,Zhen Lu,Yongzheng Zhang
Properly engineered heterojunction photocatalysts warrant a more effective way to facilitate the separation of photoexcited electron-hole pairs and consequently bolster the photocatalytic hydrogen evolution performance. Herein, 3D bicontinuous nanoporous reduced graphene oxide (np-rGO) is served as a free-standing supporting matrix for the anchorage of CdS nanoparticles to obtain the highly efficient photocatalysis system for hydrogen production . The bicontinuous internal ligament and open nanopores in 3D nanoporous heterojunction are conducive to multiple reflecting and scattering of the incident light, leading to improved light absorption and utilization capacity. Moreover, the construction of p-n heterojunction with staggered band alignment is achieved in CdS/np-rGO to accelerate the transport of photo-excited carriers. The constructed CdS/np-rGO p-n heterojunction achieves a corresponding hydrogen generation rate of 2171.23 μmol g −1 h −1 , which is 3.6 times in comparison with bare CdS. DFT calculations also indicate the preferable photocatalytic performance of CdS/np-rGO could be assigned to the ideal interfacial charge rearrangement on the heterointerface, which optimizes the H* adsorption kinetic energies and leads to a remarkable enhancement in the charge separation efficiency. It is anticipated this work could provide new sight for making the best usage of sunlight to produce solar fuel.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Cao Yang,Qing Liming,Yao Junru,Wang Yan,Gu Ning,Fu Qiang,Sun Youyi
A new integrated electrode-separator-electrolyte hydrogel is designed and prepared, which is composed of organic liquid crystal, polyvinyl alcohol (PVA), polyaniline (PANI), and reduced graphene oxide (rGO). The organic liquid crystal is introduced into PVA hydrogel, effectively improving compatibility between active materials and hydrogel matrix. The PANI active material is in situ polymerized in hydrogel to prepare PANI-double-network hydrogel. It simultaneously acts as electrode, separator, and electrolyte for assembling flexible solid-state supercapacitor. It obtains an area-specific capacitance of 160.2 mF/cm 2 and a power density of 101.5 μW/cm 2 with an energy density of 21.0 μWh/cm 2 . This work provides a new method to reduce interfacial resistance of electrode, separator, and electrolyte of flexible solid-state supercapacitor, further improving its electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 23
·5838
·
IF 3.1
Xiaonan Wang,Dianzhen Wang,Kaixuan Rong,Qiang Tao,Pinwen Zhu
Introducing a second phase has been an effective way to solve the brittleness of boron carbide (B4C) for its application. Though reduced graphene oxide (rGO) is an ideal candidate for reinforcing the B4C duo’s two-dimensional structure and excellent mechanical properties, the toughness is less than 6 MPa·m1/2, or the hardness is lower than 30 GPa in B4C–graphene composites. A barrier to enhancing toughness is the weak interface strength between rGO and B4C, which limits the bridging and pull-out toughening effects of rGO. In this work, internal stress was introduced using a high-pressure and high-temperature (HPHT) method with B4C–rGO composites. The optimal hardness and toughness values for the B4C-2vol%rGO composite reached 30.1 GPa and 8.6 MPa·m1/2, respectively. The improvement in toughness was 4 times higher than that of pure B4C. The internal stress in the composite increased gradually from 2.3 GPa to 3.3 GPa with an increase in rGO content from 1vol%to 3vol%. Crack deflection, bridging, and rGO pull-out are responsible for the improvement in toughness. Moreover, the high internal stress contributed to the formation of good interface strength by embedding rGO into the B4C matrix particles, which further enhanced the dissipation of the crack energy during the pull-out process and led to high toughness. This work provides new insights into synthesizing high-toughness B4C matrix composites.
研究领域:
材料科学
·
机械工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Ren Zongli,Zhao Zhongwei,Ma Xin,Zhang Weiwei
Construction of multi-interface contact step-scheme (S-scheme) photocatalyst is a promising pathway to achieve high-electron transfer efficiency for photodegradation estrone and congo red. In this paper, g-C 3 N 4 is chosen as the main photocatalyst, CeO 2 nanosheet with the unique Ce 4+ → Ce 3+ conversion performance and Fe 3 O 4 -Reduced graphene oxide are loaded onto the g-C 3 N 4 surface to bulid 2D-2D magnetic photocatalyst. The 2D–2D magnetic photocatalyst structure imparts reusability by magnetic retrieval and at the same time Fe 3 O 4 -Reduced graphene oxide acts as an efficient host for g-C 3 N 4 /CeO 2 composite photocatalyst. The photocatalytic performance is examined using etsrone and congo red. Photodegradation studies show the CeO 2 /g-C 3 N 4 / Fe 3 O 4 - Reduced graphene oxide a composite catalyst can degrade 71% of estrone, 92% of congo red and 89% phenanthrene, Free radical scavenger test shows superoxide and hydroxyl radical species play a major role in the degradation. Furthermore, it is demonstrated that the magnetic CeO 2 /g-C 3 N 4 / Fe 3 O 4 -Reduced graphene oxide possesses strong antibacterial properties against Proteus mirabilis and Escherichia coli. A three-factor-three-level Box–Behnken design (BBD) was selected to optimize three greatly influential parameters: light irradiation time (min), The quality of photocatalyst(mg) and pollution concentration(ppm) by response surface methodology. It is expected that CeO 2 /g-C 3 N 4 / Fe 3 O 4 - Reduced graphene oxide can be used as a 2D–2D magnetic photocatalyst for to achieve its valorization, which have very broad development prospects in the field of environmental remediation or catalysis. Graphical Abstract
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Le Li,Yawen Zhang,Chengyi Si,Cong Cai,Hongyu Liu,Xiaoqiang Fan,Minhao Zhu
Two-dimensional materials, such as Ti 3 C 2 T x and graphene oxide (GO), are considered candidates for a new generation of lubricating materials due to their unique physical and chemical properties. However, the dispersion stability of Ti 3 C 2 T x and GO in non-polar oils is insufficient, hindering their potential as lubricating additives. Herein, 1,12-Dodecanediamine (DDM) was used as a bridge to connect Ti3C2Tx and GO, and to reduce graphene oxide (rGO) for forming the stacked two-dimensional multilayer Ti3C2Tx/rGO heterostructures . The multilayer Ti 3 C 2 T x /rGO heterostructure exhibits excellent dispersion stability in PAO 20, ensuring its continuous integration into the tribo-interfaces throughout the friction process. The addition of 0.06 wt% multilayer Ti 3 C 2 T x /rGO to the base oil reduced the average friction coefficient and wear volume by 35.3% and 41.6%. The enhanced lubrication performance is mainly due to the unique multilayer heterostructure of Ti 3 C 2 T x /rGO. During friction, the disintegration of Ti 3 C 2 T x into small fragments effectively safeguards the structural integrity of rGO, thereby facilitating the formation of a robust and smooth multilayer lubrication film. Additionally, Ti3C2Tx is adhered to the wear surface in smaller sizes or evolved into the form of Ti oxides. The emergence of this new composite material is not only expected to solve the problem of insufficient performance of traditional lubricating materials under extreme conditions, but also laid the foundation for expanding the application of two-dimensional materials in the field of lubrication.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xinmiao Nie,Xue Zhong,Fan Yang,Rongguo Wang,Xiaodong He,Wenbo Liu
Real-time detection of harmful gases at room temperature has become a serious problem in public health and environmental monitoring. Two-dimensional materials with semiconductor properties BiOCl is a promising gas-sensitive material due to its large specific surface area and adjustable band gap as well as outstanding safety characteristics. However, limited by the weak gas adsorption sites and sluggish charge-transfer ability, the performance of BiOCl could not be fully exploited. Oxygen vacancy (Vo) engineering can introduce lattice defects, thereby significantly increasing the local charge density and enhancing the adsorption of gases, which is an effective strategy to enhance the gas-sensing performance. In this work, we composite BiOCl with a vacancy (Vo-BiOCl) and reduced graphene oxide (rGO) to construct a Vo-BiOCl/rGO heterostructure with enhanced gas adsorption sites. Experimental and theoretical calculations show that Vo can enhance the adsorption of gases and the introduction of rGO forms a high-quality heterostructure with BiOCl, which can effectively reduce the band gap of BiOCl and promote electron transfer, thereby improving the sensitivity of the sensor. Benefiting from above, Vo-BiOCl/rGO achieves the ability to detect low concentrations of NO2/NH3 at room temperature, with high sensitivity (55% at 1 ppm of NO2 and −28% at 1 ppm of NH3), fast response time (40 s at 1 ppm of NO2 and 2 s at 1 ppm of NH3), good stability (over 150 days), and fully recoverable gas sensitivity.
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
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Xihao Guan,Mingkun Zhao,Zhanyong Zhao
There are some challenges in using aluminum as a cathode material for lithium batteries in acidic corrosive environments. Graphene oxide (GO) and reduced graphene oxide (rGO) possess a potential in enhancing the protection role at Al surfaces. To further improve the corrosion resistance, a mixed solution of B-rGO and GO was obtained a protective film on the surface of Al substrates. The microstructure and corrosion properties of the B-rGO/Al composites were investigated. The corrosion resistance mechanism of the composite was analysed. The results showed B were doped in the protective film and play a significant role in determining the corrosion resistance for the B-rGO/Al composite. Compared with the pure Al and rGO/Al composite, the B-rGO/Al composite possessed the superior corrosion resistance, and the fitted current density values of the B-rGO/Al composite, GO/Al composite and pure Al were 83.5 μA/cm -2 , 317 μA/cm -2 and 507 μA/cm -2 , respectively. This was associated with the structural defects and reduction in diffusion path of irons. The aim of this work is to offer insights into efficient protective coating for Al cathodes in acidic environments.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
·
2016
·Vol. 230
·期 12
·1711-1718
·
IF 1.183
Ning Xiang,Jiguo Huang,Honggang Zhao,Chengjia Liu,Xingjuan Liu
A green and simple chemistry approach was demonstrated to prepare reduced graphene oxide (rGO) using sodium humate (SH) as the reducing agent. Without using toxic and harmful chemicals, this method is environmentally friendly and suitable for the large-scale production of graphene. At first, the improved Hummers method to oxidize graphite for the synthesis of graphene oxide (GO) was applied, and then the as-prepared GO was reduced by SH to form rGO. Characterization was performed using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectrometry (XPS) and Raman spectra. The intensity ratio of the D and G band (I D /I G ) of GO after reduction with SH increases from 0.96 (GO) to 1.11 (rGO), the results obtained from the Raman spectra proved high purity of the final products.
研究领域:
材料科学
·
环境化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）