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.
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JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 6
·3233-3243
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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.
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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.
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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.
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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.
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MATERIALS RESEARCH BULLETIN
·
2024
·
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.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 7
·072501
·
IF 3.1
Hui-Ting Hu,Jiang-Tao Xu,Bing-Lun Li,Guo-Cheng Han,Xiao-Zhen Feng,Heinz-Bernhard Kraatz
Naringenin (NRG), a flavanone compound present in citrus fruits, has a variety of beneficial physiological active functions such as antioxidant, anti-inflammatory, and hypoglycaemic. In this study, an sensor was constructed by electrodeposition and used for the electrochemical study of NRG. Reduced graphene oxide (rGO) and glutathione (GSH) showed the ability to synergistically amplify NRG signals and possessed good linearity in the concentration range of 10.00–1200.00 μmol l−1. The linear equation is Ip = 0.0776logc + 0.9353 (R2 = 0.9901), and the limit of detection is 3.33 μmol l−1. The sensor performed well in terms of reproducibility, stability, and selectivity, which in turn enabled the detection of NRG in tomatoes. The average recovery of the sensor is 95.68% to 111.92%, with RSD less than 11.89%. The results were also verified by Ultraviolet–visible spectroscopy(UV-vis). Furthermore, density-functional theory was employed to analyse the front track of the NRG, speculating that the NRG underwent a transfer of two electrons and two protons.
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Desalination and Water Treatment
·
2024
·
IF 1
Shuohua Zhou,Weiming Xiang,Qiang Zhong,Shaogui Yang,Gancheng Zuo,Zhe Xu,Qiuyi Ji,Jijie Kong,Chenmin Xu,Bing Yang,Dunyu Sun,Yinhao Dai,Yazi Liu,Huan He,Shiyin Li
Sulphate radical (SO 4 · - ) -based advanced oxidation process (SR-AOP) is a promising sewage treatment technology. Reduced graphene oxide (rGO) supported Co 3 O 4 composites were synthesized by a hydrothermal method for the degradation of iohexol (IOH) in the rGO/Co 3 O 4 /peroxymonosulfate (PMS) system. Experimental results show that rGO/Co 3 O 4 possessed much better PMS activated ability than pure GO or Co 3 O 4 , which is ascribed to the summation of rGO and Co 3 O 4 . The efficiency of rGO/Co 3 O 4 composite, single GO and Co 3 O 4 nanocrystals for the degradation of IOH were 98.7%, 15.8% and 79.8% at 15 min, and their corresponding reaction rate constants ( k app ) were 0.21 min −1 , 0.0077 min −1 and 0.080 min −1 , respectively. The results of active species capture experiment and electron paramagnetic resonance (EPR) experiment, showed that singlet oxygen is the main active species, which is non-radical degradation. rGO is conducive to the electron conduction of Co 3 O 4 , thus improving the efficiency of PMS activation. The system is simple and efficient, which is an effective technology to remove IOH.
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Materials
·
2024
·Vol. 17
·期 9
·2144
·
IF 3.1
Haiwei Hu,Yanyan Guo,Jiang Zhao
Flexible electronic products, with their characteristics of flexibility and wearability, have attracted significant attention and have become an important direction in the research and development of the electronics industry. Planar micro-supercapacitors (MSCs) with flexible composite electrodes can provide reliable energy support for these products, propelling their further development. The research employed a quick, effective, and environmentally friendly method of laser scribing to create shape-controllable flexible composite electrodes on composite films of Poly(3,4-ethylenedioxythiophene) and graphene oxide (PEDOT/GO), which were subsequently assembled into MSCs. An analysis of the composite electrode morphology, structure, and elemental distribution was conducted through the utilization of SEM, TEM, and XPS techniques. Following this, a comprehensive evaluation of the electrochemical performance of the flexible MSCs was carried out, which included cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and assessment of cyclic stability. The analysis of the CV results indicated that the MSCs achieved the areal capacitance of 5.78 mF/cm2at 5 mV/s. After 5000 cycles at a current density of 0.05 mA/cm2, the capacitance retention rate was 85.4%. The high areal capacitance and strong cycle stability of MSCs highlight the potential of PEDOT/reduced graphene oxide (PEDOT/rGO) electrodes in electrode applications.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xiao-Zhen Feng,Kun-Zhi Wang,Ke-Hang Song,Guo-Cheng Han,Bing-Lun Li,Heinz-Bernhard Kraatz
Moxifloxacin (MOX) and gatifloxacin (GAT) are structurally similar and possess close oxidation peak potentials, making it difficult for simultaneous detection by electrochemical methods. To address this, an electrochemical sensor was constructed with reduced graphene oxide (rGO) and copper porphyrin complex (Cu-TCPP), achieving signal amplification and simultaneous detection of MOX and GAT. The linear relation range from 5.00 to 600.00 μmol·L −1 for MOX (LOD is 1.34 μmol·L −1 ) and 10 to 300 μmol·L −1 for GAT (LOD is 0.59 μmol·L −1 ). When applied to water samples, it achieved recoveries of 100.09–112.02 % with a relative standard deviation (RSD) of less than 6 % for MOX, and 97.27–110.72 % with an RSD of less than 4 % for GAT. Further calculations indicated that the electro-oxidation of GAT involved two protons and two electrons.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhengyan Hao,Zhiwei Zhang,Xijia Yang,Xuesong Li,Yang Gao,Liying Wang,Yuxin Huang,Wei Lü
Zinc-ion hybrid supercapacitors (ZIHSCs) have garnered widespread attention due to their integration of the excellent characteristics of both batteries and capacitors. This study employs a synergistic strategy combining hydrothermal and high-temperature calcination methods to construct a nanosphere-structured T-Nb 2 O 5 composite anode material coated with reduced graphene oxide (rGO) on a flexible carbon cloth (CC) substrate (T-Nb 2 O 5 /rGO@CC), in conjunction with a hierarchical super-mesoporous activated carbon cathode (ACcp@CC) derived from discarded citrus peel. The rGO coating structure suppresses the volume expansion of the internal nanostructure caused by charging and discharging, effectively enhancing mechanical stability. At the same time, the three-dimensional conductive network of rGO effectively compensates for the poor intrinsic conductivity of Nb 2 O 5 . The constructed ZIHSC delivers a capacitance of 718.56 mF cm −2 at 1 mA cm −2 , and achieves a maximum energy density of 399.20 μWh cm −2 at 1 mW cm −2 . Furthermore, after 50,000 ultralong-cycle, the capacity retention rate is 104.17 %. The assembled flexible device not only possesses excellent mechanical properties but also delivers a specific capacitance of 389.89 mF cm −2 at 1 mA cm −2 , providing long-term power for various electronic devices. This study provides a solid theoretical reference for the design of stable composite structures and the investigation of ultra-long cycling performance in niobium-based electrode materials.
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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.
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