INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Kewei Wang,Jinshan Tan,Zejia Lu,Shuai Chen,Xilin She,Huawei Zhang,Dongjiang Yang
The preparation of hydrogen evolution reaction (HER) electrocatalyst with high catalytic performance is a huge challenge. In this work, we develop a MoP/Fe 2 P/RGO composite as a electrocatalyst for HER. The MoP/Fe 2 P/RGO exhibits excellent electrocatalytic performance with a Tafel slope and an onset overpotential of 51 mV/dec and 105 mV, respectively. To drive 10 mA/cm 2 , it only requires a small over-potential of 156 mV. The high electrocatalytic HER activity is mainly due to the synergistic effect of MoP and Fe 2 P. In addition, the introduction of RGO not only prevents particle aggregation and coalescence during high temperature phosphating, but also improves the conductivity of the catalyst.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Bin Xiao,Bao Zhang,Lin-bo Tang,Chang-sheng An,Zhen-jiang He,Hui Tong,Wan-jing Yu,Jun-chao Zheng
V 2 O 3 is a promising anode material and has attracted the interests of researchers because of its high theoretical capacity of 1070 mAh g −1 , low discharge potential, inexpensiveness, abundant sources, and environmental friendliness. However, the development and application of V 2 O 3 have been hindered by the low conductivity and drastic volume change of V 2 O 3 composites. In this work, V 2 O 3 /reduced graphene oxide (rGO) nanocomposites are successfully prepared through a facile solvothermal method and annealing process. In this synthesis protocol, V 2 O 3 nanoparticles (NPs) are encapsulated by rGO. This unique structure enables rGO to inhibit volume changes and improve the ion and electronic conductivity of V 2 O 3 . In addition, V 2 O 3 NPs, which exhibit sizes of 5–40 nm, are uniformly dispersed on rGO sheets without aggregation. The Li + storage behavior of V 2 O 3 /rGO is systematically investigated in the potential range 0.01–3.0 V. The V 2 O 3 /rGO nanocomposite can achieve a high reversible specific capacity of 823.4 mAh g −1 under the current density of 0.1 A g −1 , and 407.3 mAh g −1 under the high current density of 4.0 A g −1 . The results of this study provide insight into the fabrication of rGO-based functional materials with extensive applications.
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2017
·
IF 1.025
Meiling Peng,Tao Wang,Zhenzhen Jiang,Sheng Wang
In this work, a synthesis method of residue-free PdPt nanodendrites on reduced graphene oxide (rGO) is reported. Using UV light as an energy trigger and methanol as the reducing agent, PdPt nanodendrites are synthesized with clean, residue-free surfaces (e.g., surfactant and polymer). In comparison with commercial Pd/C and Pt/C catalysts, the as-prepared PdPt nanodendrites on rGO have a large electrochemically active surface area, enhanced catalytic activity, high stability, and tolerance toward the ethanol oxidation reaction in alkaline media. Among the nanodendrite composites prepared, those containing a Pd:Pt ratio of 1:2 on rGO exhibit the best stability and durability, and their mass activity is 2.0 and 2.4 times greater than those of commercial Pt/C and Pd/C catalysts, respectively. This strategy presents an environmentally friendly way to fabricate other noble metal catalysts with improved catalytic activity and stability for use in direct alcohol fuel cells.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2017
·Vol. 12
·期 1
·1-7
·
IF 2.833
Bo Tang,Zhengwei Wang,Huang Weiqiu,Sen Li,Tingting Ma,Haogang Yu,Xufei Li
With the development of microelectronic devices, the insufficient heat dissipation ability becomes one of the major bottlenecks for further miniaturization. Although graphene-assisted epoxy resin (ER) display promising potential to enhance the thermal performances, some limitations of the reduced graphene oxide (RGO) nanosheets and three-dimensional graphene networks (3DGNs) hinder the further improvement of the resulting thermal interface materials (TIMs). In this study, both the RGO nanosheets and 3DGNs are adopted as co-modifiers to improve the thermal conductivity of the ER. The 3DGNs provide a fast transport network for phonon, while the presence of RGO nanosheets enhances the heat transport at the interface between the graphene basal plane and the ER. The synergy of these two modifiers is achieved by selecting a proper proportion and an optimized reduction degree of the RGO nanosheets. Moreover, both the high stability of the thermal conductivity and well mechanical properties of the resulting TIM indicate the potential application prospect in the practical field.
✓ 已验证
产品关联
DOI
PubMed
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.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 38
·32414-32421
·
IF 3.289
Shancheng Yan,Keyu Li,Zixia Lin,Haizeng Song,Tian Jiang,Jiansheng Wu,Yi Shi
SnS2/graphene (SnS2/G) composites have been explored extensively as a promising candidate for Lithium Ion Battery (LIB) anodes in recent years. Previously, the SnS2 conversion/reduction step of the reaction mechanism is generally believed to be irreversible or only partially reversible, which severely underestimates the theoretical capacity of SnS2. In this work, SnS2 nanoparticles have been successfully stacked on reduced graphene oxide (RGO) via a facile and effective solvothermal method using ethylene glycol as a chelant. The SnS2/graphene nanocomposite retained many of the original 2D characteristics of the graphene nanosheets. As a result, Li+ storage properties were significantly improved. The SnS2/RGO nanocomposites show a higher storage capacity of 939.0 mA h g−1 after 30 cycles at a current density of 0.1 A g−1, and a long-term cycle capacity of 615.5 mA h g−1 even after 200 cycles at 1 A g−1. The superior cycling stability of the SnS2/RGO electrode is attributed to greater reversibility in the initial conversion reaction, ascribed to the presence of the Sn nanoparticles.
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 14
·3438-3446
·
IF 5.317
Shouzhi Wang,Jiayan Zhu,Yongliang Shao,Weiran Li,Yongzhong Wu,Lei Zhang,Xiaopeng Hao
Graphical Will it bend? A novel 3D porous network MoS 2 @CNT/RGO membrane was designed, fabricated, and assembled into a symmetric flexible supercapacitor. The supercapacitor exhibits a high rate capability, stable cycling life at high rates, and high power density. The study may provide opportunities for expanding the potential of self-supporting electrode materials in portable/wearable electronics. Two-dimensional atomically thick materials, reduced graphene oxide (RGO), and layered molybdenum disulfide (MoS 2 ) have been investigated as potential novel energy storage materials because of their distinct physicochemical properties. These materials suffer, however, from rapid capacity decay and low rate capability. This study describes a facile, binder-free approach to fabricate large-scale, 3D network structured MoS 2 @carbon nanotube (CNT)/RGO composites for application in flexible supercapacitor devices. The as-obtained composites possess a hierarchical porosity, and an interconnected framework. The electrochemical supercapacitive measurements of the MoS 2 @CNT/RGO electrode show a high specific capacitance of 129 mF cm −2 at 0.1 mA cm −2 . The symmetric supercapacitor devices based on the as-obtained composites exhibit a long lifetime (94.7 % capacitance retention after 10 000 cycles), and a high electrochemical performance (29.7 mF cm −2 ). The present experimental findings will lead to scalable, binder-free synthesis of MoS 2 @CNT/RGO hybrid electrodes, with enhanced, flexible, supercapacitive performance, in portable and wearable energy storage devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 72
·67488-67494
·
IF 3.289
Maoyong Zhi,Wanxia Huang,Qiwu Shi,Mingzhe Wang,Qibin Wang
Tungsten trioxide/reduced graphene oxide (WO3/RGO) nanocomposite film was fabricated by the sol–gel spin-coating technique, using a mixed colloidal dispersion of WO3 precursor and GO. The structure, surface morphology and optical properties of WO3 and WO3/RGO films were investigated by means of X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy and UV-visible spectrophotometry. The electrochemical and electrochromic performances of the WO3 and WO3/RGO films were studied by chronoamperometry, in situ optical transmittance and cyclic voltammogram analysis. In the WO3/RGO nanocomposite film, monoclinic WO3 nanoparticles were grafted onto the surface of RGO sheets via C–W and C–O–W chemical bonds. The results showed that the WO3/RGO nanocomposite film exhibited shorter coloration–bleaching times (tc = 9.5 s and tb = 7.6 s), higher coloration efficiency (75.3 cm2 C−1 at 633 nm), larger optical modulatory range (59.6% at 633 nm) and better cyclic stability compared with WO3 films, which are attributed to faster Li+ ion diffusion and electron transfer rate. The methodology provides a facile and industrially scalable approach to obtain fast switching electrochromic materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 6
·3233-3243
·
IF 2.302
Jiao Yuzhi,Zhang Haitao,Dong Tao,Shen Peng,Cai Yingjun,Zhang Hailang,Zhang Suojiang
Pomegranate-shaped Fe 3 O 4 /RGO nanohybrids were prepared via an ethylene glycol-mediated solvothermal method. Their morphology and structure were investigated by different characterization techniques. The red shift in FTIR and Raman spectra of nanohybrids demonstrated the existence of interfacial interactions between Fe 3 O 4 and RGO. As anode material for lithium-ion battery, these nanohybrids exhibited elongated cycling stability and enhanced reversible capacity compared with bare Fe 3 O 4 nanoparticles and mixture (Fe 3 O 4 + RGO). The initial capacity of the nanohybrids could reach to 1266 mAh g −1 and remained 992 mAh g −1 after 100 cycles at 150 mAh g −1 . Their cells manifested an outstanding rate capability of 384 mAh g −1 at 5.0 °C. The relationships between microstructure and performance were carefully exploited to obtain key factors that are helpful for design and construction of hybridized materials with improved electrochemical performance.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Jinwei Lou,Yang Liu,Zhongyong Wang,Dengwu Zhao,Chengyi Song,Jianbo Wu,Neil Dasgupta,Wang Zhang,Di Zhang,Peng Tao,Wen Shang,Tao Deng
Reusing polluted water through various decontamination techniques has appeared as one of the most practical approaches to address the global shortage of clean water. Rather than relying on single decontamination mechanism, herein we report the preparation and utilization of paper-based composites for multifunctional solar-driven clean water generation that is inspired by the multiple water purification approaches in biological systems. The reduced graphene oxide (rGO) sheets within such composites can efficiently remove organic contaminants through physical adsorption mechanism. Under solar irradiation, the floating rGO composites can instantly generate localized heating, which not only can directly generate clean water through distillation mechanism but also significantly enhance adsorption removal performance with the assistance of upward vapor flow. Such porous-structured paper-based composites allow for facile incorporation of photocatalysts to regenerate clean water out of contaminated water with combined adsorption, photodegradation, and interfacial heat-assisted distillation mechanisms. Within a homemade all-in-one water treatment device, the practical applicability of the composites for multifunctional clean water generation has been demonstrated.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2016
·
IF 0.951
Dewang Kong,Min Zhao,Shikuo Li,Fangzhi Huang,Jiming Song,Yupeng Yuan,Yuhua Shen,Anjian Xie
In this paper, a facile and efficient method combined sol–gel method with hydrothermal process was employed for preparing titanium dioxide (TiO 2 ) /reduced graphene oxide (rGO) nanocomposites without using any reductants or surfactants. This approach leads to the reduction of graphene oxide (GO) and the growth of TiO 2 nanorods simultaneously. The results reveal that the TiO 2 short nanorods with average size of 15 nm in length and 10 nm in diameter were uniformly grown on the rGO sheets with high dispersion. Compared with the pure TiO 2 nanoparticles, the TiO 2 /rGO composites exhibit strong absorption in the visible light range. The photocurrent density of nanocomposites reached 0.826 mA/cm 2 under the simulated sunlight illumination, which is 3.5 times than that of pure TiO 2 . An enhancement of photocatalytic hydrogen formation rate for the water splitting was observed over the TiO 2 /rGO composite photocatalysts, the fastest formation rate can reach 889.28 μ mol ⋅ g − 1 ⋅ h − 1 when TiO 2 coupling with 1wt.% rGO. Also the hydrogen production rate is about 3.27 times larger than pure TiO 2 and 2.23 times than P25 due to the excellent electron trapping and transportation properties of rGO and the synergistic effect between TiO 2 and rGO.
✓ 已验证
产品关联
DOI
高影响因子
SOFT MATERIALS
·
2024
·
IF 1.6
Jing Wang,Shaopeng Lv,Xinchen Gui,Yadong Yu
Developing innovative packaging films is of great significance for extending the shelf-life of perishable fruit. In this study, we successfully synthesized antibacterial composites by incorporating Fe into reduced graphene oxides (rGO) and MoS2. The resulting rGO-MoS2-Fe2O3 composites demonstrated effective inhibition against E. coli and S. aureus. After investigating the antibacterial mechanism of rGO-MoS2-Fe2O3 composites, we utilized carboxymethyl cellulose (CMC) as a film substrate to create CMC films infused with rGO-MoS2-Fe2O3 composites. The incorporation of rGO-MoS2-Fe2O3 composites decreased the light transmittance and hygroscopicity of CMC films, while greatly enhancing the mechanical properties of CMC films. To evaluate the practical applications of these rGO-MoS2-Fe2O3-based CMC films, we conducted a strawberry preservation experiment, which revealed that CMC films supplemented with 5 wt% rGO-MoS2-Fe2O3 exhibited exceptional performance in preventing weight loss and maintaining total titratable acidity levels in strawberries. These findings highlighted the promising potential of rGO-MoS2-Fe2O3-based CMC films for fruit preservation applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）