CATALYSIS LETTERS
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2024
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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
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材料科学
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化学工程
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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
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摩擦学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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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
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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 Research and Technology-JMR&T
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2025
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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
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电化学
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产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 23
·5838
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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
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机械工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL PHYSICS
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2024
·Vol. 161
·期 7
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IF 3.1
Wang Zhenjiang,Yang Xinli,Wang Gang,Yang Xiping,Qiao Longhao,Lu Mingxia
Three-dimensional (3D) reduced graphene oxide (rGO)/Ti 2 CT x MXene hybrid aerogels were effectively prepared by a two-step method involving hydrothermal reaction and freeze-drying. The intimately coupled rGO/Ti 2 CT x hybrid aerogel combined high electrical conductivity, large interlayer spacing, and excellent mechanical stability of Ti 2 CT x , which not only effectively prevents the self-restacking of Ti 2 CT x nanosheets, exposes more active sites exposed, and improves the volume change during the charge/discharge process but also increases the accessibility of ions and promotes the rapid transfer of ions/electrons. As a result, rGO/Ti 2 CT x 17.5–2.5 as the working electrode of electric double layer capacitors delivers a large specific capacity (107.05 F g −1 at 0.5 A g −1 in a 1M Na 2 SO 4 electrolyte), a high rate capability (maintains 30% of its initial capacitance at 10 A g −1 , which is much better than rGO and Ti 2 CT x ), and excellent long-term large-current cycle stability (the initial capacitance remains above 71.1% after 10 000 cycles at 1 A g −1 ). In addition to providing a high-performance electrode for supercapacitors, this study proposes an efficient and time-saving strategy for constructing 3D structures from 2D materials.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Jing Li,Zhengguang Shi,Markas Law,Zhaoyu Chen,Qianru Lin,Yaohui Zhang,Mingxue Huo,You Wang,Cheng-Te Lin,Palani Balaya,Hsu-Sheng Tsai
VS 2 is a potential anode material for lithium-ion batteries (LIBs) due to its advantageous properties. Herein, a novel three-dimensional (3D) VS 2 /reduced graphene oxide (rGO) heterostructure (VS 2 -rGO) was fabricated by in-situ assembly of caterpillar-like VS 2 nanosheets on rGO. This 3D VS 2 -rGO with a well-defined heterojunction interface is engineered to mitigate the volumetric expansion of VS 2 during Li + intercalation/deintercalation cycles. This optimized design promotes enhanced conductivity across the heterojunction, facilitating efficient electron and ion transport. The VS 2 -rGO electrode shows higher reversible capacity and better rate performance (644.02 mA h g −1 at 0.1 A g −1 after 140 cycles, 526.66 mA h g −1 at 2 A g −1 ) as compared to the pure VS 2 electrode (433.69 mA h g −1 at 0.1 A g −1 after 140 cycles, 63.91 mA h g −1 at 2 A g −1 ). Ex-situ XRD analysis suggests that the Li + storage mechanism in the VS 2 -rGO electrode involves the initial intercalation, followed by intercalation and conversion. The lower Li + diffusion barrier within the VS 2 -rGO heterojunction (0.183 eV) compared to the VS 2 layers (0.225 eV), as predicted by first-principles calculations, resulting the enhanced Li + transport kinetics and improved cycling performance of the VS 2 -rGO electrode material. This work offers novel perspectives for the influence of heterojunctions on LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Mianke Chen,Chenghong Zhang,Ruikai Liu,Kang Qiu,Youlin Gao,Yikang Qiang,Yiqing Yang,Wuyi Chai,Mahmoud A. Khalifa,Jialiang Luo,Wei Ding,Ganhong Zheng,Zhigao Sheng
Multi-layer 2D material assemblies introduce numerous interfaces that would improve microwave absorbing. Here, a 3D porous rGO/Ti 3 C 2 T x /TiO 2 heterostructure was prepared using a one-step hydrothermal synthesis. Due to the presence of the 2D/2D van der Waals heterojunction in rGO/Ti 3 C 2 T x featuring face-to-face contacts, and the 2D/0D heterojunctions in Ti 3 C 2 T x /TiO 2 , the interfacial polarization is optimized. The minimum reflection loss (RL min ) achieves −37.31 dB, and the effective absorption bandwidth (EAB) extends to 6.45 GHz (with<−10 dB). These results not only shed light on understanding and enhancement of interfacial effects, but also provides an appealing mode for the implementation of heterogeneous interfacial engineering using tailored 2D hierarchical structures.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 9
·5478-5486
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IF 3.119
Xiawei Yun,Zhiyuan Xiong,Yaning He,Xiaogong Wang
In this work, reduced graphene oxide (RGO) was used as a material to fabricate superhydrophobic lotus-leaf-like surfaces through soft-lithographic duplication. In the process, a polydimethylsiloxane (PDMS) stamp was prepared by replica molding against the surfaces of fresh lotus leaves that functioned as masters. A dispersion of octadecylamine-modified reduced graphene oxide (ODA-RGO) in tetrahydrofuran (THF) was used as “ink”. The lotus-leaf-like surfaces were fabricated by microcontact printing on the solid substrates. The results showed that due to the good processibility of the ODA-RGO dispersion, the printed layers display papillary micro/nano-structures with high fidelity to the surfaces of lotus leaves. The RGO-based lotus-leaf-like surfaces possess superhydrophobic characteristics with a water contact angle larger than 160° and the contact angle hysteresis less than 5°. Due to the excellent chemical stability of the RGO sheets, as-prepared surfaces show remarkable superhydrophobic stability. The lotus-leaf-like surfaces maintain the superhydrophobicity after heating treatment at 150 °C for 24 h or being exposed to corrosive solutions with different pH values for 12 h. The present findings prove that the RGO-based material is an ideal candidate for fabrication of environment-durable lotus-leaf-like surfaces, which can be expected to have applications in different areas.
研究领域:
材料科学
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表面工程学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2014
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IF 5.9
Jianjun Ding,Wenhao Yan,Song Sun,Jun Bao,Chen Gao
A series of CaIn2S4-reduced graphene oxide (RGO) nanocomposites with different RGO contents were fabricated using a facile hydrothermal approach. During the hydrothermal process, the reduction of graphene oxide to RGO, in situ deposition of synthesized CaIn2S4 nanoparticles on RGO nanosheets and formation of chemical-bonding CaIn2S4-RGO nanocomposites were performed simultaneously. Under visible light irradiation, the as-prepared CaIn2S4-RGO nanocomposites showed enhanced photocatalytic performance for rhodamine B degradation and phenol oxidation. The sample with 5 wt % RGO hybridized CaIn2S4 exhibited the highest photocatalytic activity. The enhancement of photocatalytic performance may be related to the increased adsorption/reaction sites, positive shift of the valence band potential, and high separation efficiency of photogenerated charge carriers due to the electronic interaction between CaIn2S4 and RGO. We hope that this work can not only provide an in-depth study on the photocatalytic mechanism of RGO-enhanced activity, but also provide some insights for fabricating efficient and stable RGO-based photocatalysts in the potential applications of purifying polluted water resources.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Xianhong Zheng,Jinhao Tang,Peng Wang,Zongqian Wang,Lihua Zou,Changlong Li
Flexible, lightweight, and durable electromagnetic interference (EMI) shielding materials are urgently required to solve the increasingly serious electromagnetic radiation pollution. Transition metal carbides/nitrides (MXenes) are promising candidates for EMI shielding materials because of their excellent metallic electrical conductivity . However, MXenes are highly susceptible to oxidization when exposed to wet environments, leading to the loss of their functional properties and degradation of reliability and stability. Herein, an interfused core–shell heterogeneous reduced graphene oxide (rGO)/MXene aerogel (GMA) is designed for the first time via coaxial wet spinning and freeze-drying. The fabricated GMAs exhibit excellent EMI shielding performance, and the EMI shielding effectiveness (SE) and specific EMI SE can be up to 83.3 dB and 3119 dB·cm 3 /g, respectively, which is higher than most carbon-based and MXene-based aerogels and foams. More importantly, GMAs have only a 17.4 % degradation in EMI shielding performance after 120 days due to the protection of hydrophobic graphene sheath, exhibiting superior EMI shielding durability to its MXene film counterpart. Moreover, the hydrophobic GMAs exhibit good oil/water separation and thermal insulation performance. The interfused core–shell GMAs are highly promising for applications in durable EMI shielding, thermal insulation, oil/water separation and sensors, etc.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Xuheng Li,Feng Liu,Weifang Zhang,Hongbo Lu,Jing Zhang
Preoxidation of As(III) to As(V) is required for the efficient removal of total arsenic in the treatment of wastewater. In this work, the electro-Fenton oxidation of As(III) with a high efficiency was successfully achieved by using the system of the stainless steel net (SSN) coating with reduced graphene oxide (RGO@SSN) as the cathode and stainless steel net (SSN) as the sacrificial anode. The RGO@SSN was synthesized by electrophoretic deposition-annealing method. The carbon disorder and defects of RGO resulted from the remained oxygen-containing functional groups facilitated the electrocatalytically active sites for two-electron oxygen reduction reaction (ORR). A high concentration (up to 1000 μmol/L) of H 2 O 2 was in-situ produced through two-electron oxygen reduction reaction of electro-catalysis, and then served as the electro-Fenton reagent for the oxidation of As(III). HO generated by H 2 O 2 participating the electro-Fenton reaction or decomposed at the surface of RGO@SSN cathode at acid condition endowed the strong oxidizing ability for As(III). The electro-Fenton equipped with RGO@SSN cathode has a promising application in the oxidation and removal of organic or inorganic pollutants in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）