APPLIED CATALYSIS B-ENVIRONMENTAL
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2018
·
IF 11.698
Xue Bai,Yanyan Du,Xiaoyun Hu,Yudong He,Chunliang He,Enzhou Liu,Jun Fan
A novel RP-MoS 2 /rGO nanocomposite as low-cost, environmental sustanable, stability and high-performance photocatalyst was successfully fabricated for the first time through a facile two-step hydrothermal method. Even without a noble-metal cocatalyst, the introduction of MoS 2 /rGO hybrid made RP exhibit excellent photocatalytic performance, including photoreduction of Cr (VI) and photooxidation of different organic pollutants, owing to the increased number of excited electrons/holes and enhanced separation efficiency of charge carriers. Importantly, the synergy of photocatalytic reduction and oxidation, as well as photocatalysis and adsorption played an important role in enhancing photocatalytic activity and reaching a high efficiency. Besides, the chemical structure of the RP-MoS 2 /rGO with P–S and P O bands ensure the stability of the nanocomposite materials. Overall, the photocatalytic elimination of the Cr (VI)-Organic molecule coexistence system in this work shows promising application to treatment the reality wastewater.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 39
·22169-22176
·
IF 2.936
Shiyang Wei,Qiaoxi Yu,Zhenguo Fan,Siwei Liu,Zhenguo Chi,Xudong Chen,Yi Zhang,Jiarui Xu
The preparation of polymeric composite materials with low filler content as well as high thermal conductivity has been an important subject for the field of polymer material research. During our recent investigation on polyimide (PI), it was found that poly(amic acid) (PAA) solution (in dimethylacetamide, DMAc) could crystallize at low temperature. When adding reduced graphene oxide (rGO) as the thermal conductive fillers in the PAA solution, it was also found that the crystallization process of PAA would impel the rGO to rearrange in order and form an aligned thermal conductive network. To retain the rGO network structure, the freeze-drying technique was used to remove the solvent. Subsequently, through a thermal imidization process the final rGO/PI films containing a 3D rGO network could be obtained. The PI composite films retain good flexibility, excellent thermal stability, and exhibit excellent thermal conductivity. When the content of rGO added is 8 wt%, the thermal conductivity of the rGO/PI film can reach a high value of 2.78 W m−1 K−1, which is about 15.4 times that of neat PI and 5.5 times that of the rGO/PI composite film prepared by the conventional two-step routine with the same content of rGO.
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DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 42
·16091-16098
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IF 4.052
Lixia Sun,Jianhua Sun,Xiaojun Yang,Shouli Bai,Yongjun Feng,Ruixian Luo,Dianqing Li,Aifan Chen
The low carrier mobility of BiVO4 is a bottleneck that limits its charge transfer in bulk or on the surface. Herein, reduced graphene oxide (rGO) nanosheets as an effective electron mediator were successfully loaded on BiVO4 and NiFe-layered double hydroxides (NiFe-LDHs) were decorated on BiVO4/rGO heterojunctions by two facile electrodeposition methods to construct a triadic photoanode of BiVO4/rGO/NiFe-LDH for improvement of photoelectrochemical (PEC) water splitting efficiency of BiVO4. This photoanode significantly extends the absorption region of visible light, increases the photocurrent density, exhibits an onset potential with a significant cathodic shift, and enhances photon-to-electron conversion efficiency (IPCE) compared with the pristine BiVO4 photoanode. The enhancement of PEC properties benefits from the formation of p–n heterojunctions between rGO and BiVO4 and the use of NiFe-LDH as a cocatalyst for accelerating the kinetics of oxygen evolution from water.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2016
·Vol. 27
·期 9
·9278-9285
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IF 1.798
Liu Ziyu,Xu Guangliang,Zhang Ming,Xiong Kun,Meng Pingyuan
Cobalt ferrite/reduced graphene oxide (CoFe 2 O 4 /RGO) nanocomposites were initially prepared by the interaction of alkyne-functionalized CoFe 2 O 4 NPs and azide-functionalized graphene oxide (GO–N 3 ) via the Cu (I)-catalyzed click reaction. The morphology and structure of CoFe 2 O 4 /RGO were investigated by means of XRD, FTIR, TGA, TEM, SEM and the electromagnetic parameters were measured by vector network analyzer. For CoFe 2 O 4 /RGO composites with click reaction, the minimum reflection loss could reach −40 dB at 6.8 GHz with a matching thickness of 4.0 mm, and also it had a bandwidth below −10 dB ranging from 5.8 to 8.5 GHz. The CoFe 2 O 4 /RGO composites with click reaction exhibited better microwave absorbing performance than the physical mixture. Furthermore, the covalent ligation between CoFe 2 O 4 NPs and graphene oxide could make the composites have a promising future in electromagnetic wave absorption materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Bingrong Wang,Jiacheng He,Fangqing Liu,Lei Ding
In this study, Cu 2 O/CuO/reduced graphene oxide (rGO) was synthesized through a rapid and convenient microwave-assisted hydrothermal method . The crystal structure and morphology of the as-prepared product were characterized using X-ray diffraction (XRD), field-emission-scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Raman spectroscopy , and X-ray photoelectron spectroscopy (XPS). The electrochemical performance of the novel Cu 2 O/CuO/rGO biosensor was investigated via cyclic voltammetry . The biosensor was evaluated for ascorbic acid (AA) detection and exhibited a wide linear range of 100 μM–1000 μM, a low detection limit of 0.301 μM, and a sensitivity of 1375.486 μA mM −1 cm −2 .
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SENSORS AND ACTUATORS B-CHEMICAL
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2016
·
IF 4.758
Xiaogan Li,Yangyang Zhao,Xueyan Wang,Jing Wang,Alexander M. Gaskov,S.A. Akbar
Reduced graphene oxide (rGO) decorated TiO 2 microspheres are prepared by using the hydrothermal method . The as-synthesized sample shows that TiO 2 particles are connected by the rGO nanosheets while some TiO 2 particles are found to be partly covered by rGO sheets. The rGO-decorated TiO 2 based chemoresistive-type sensor shows good sensitivity and excellent selectivity to different concentrations of ammonia from 5 ppm to 50 ppm at room temperature . However, the response and recovery speeds of the sensor to ammonia are sluggish and need further optimization.
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APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Hui Zhang,Xingyou Tian,Cuiping Wang,Hailong Luo,Jie Hu,Yuhua Shen,Anjian Xie
Reduced graphene oxide/NiO composite (RGO/NiO) was synthesized by a facile pyrolyzation process. The NiO nanoparticles with a small size of about 10–50 nm are uniformly dispersed onto the thin graphene nanosheets . The as-prepared RGO/NiO composite shows excellent microwave absorbability. The obtained composite with a coating layer thickness of 3.5 mm exhibits a maximum absorption of −55.5 dB at 10.6 GHz. And in particular, the product with a coating layer thickness of only 3.0 mm possesses a bandwidth of 6.7 GHz (from frequency of 10.2 to 16.9 GHz) corresponding to reflection loss at −10 dB (90% absorption). Thus, the as-prepared RGO/NiO composite is a very promising EM wave absorbing material as lightweight and high-performance.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2014
·Vol. 17
·期 33
·21158-21163
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IF 4.198
Meng Jiang,Zhijiang Qian,Xufeng Zhou,Xing Xin,Jinghua Wu,Chao Chen,Gongjun Zhang,Gaojie Xu,Yuchuan Cheng
A structure of hexadecyl trimethyl ammonium bromide (CTAB) micelle-assisted reduced graphene oxide–Ag nanoparticle (rGO–AgNP) hybrids is designed and fabricated for SERS detection of nonpolar polycyclic aromatic hydrocarbons (PAHs), in which CTAB micelles act as the host material to capture PAH molecules. This method provides stable aqueous suspensions of functionalized graphene with an alkyl chain, since the rGO–AgNP hybrids do not need to be pre-modified by CTAB. The result shows that the CTAB-assisted rGO–AgNP substrate has excellent SERS performance toward PAHs and ideal stability under continuous laser radiation. With further optimization, the detection limits of pyrene and perylene were 10−6 M and 10−7 M, respectively. Two different PAH molecules could be detected simultaneously by their characteristic peaks.
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MOLECULES
·
2025
·Vol. 30
·期 6
·1205
·
IF 4.6
Wenjun Zhu,Bofeng Zhang,Yao Yang,Minghai Zhao,Yuwen Fang,Yang Cui,Jian Tian
This study is based on the strategies of composite and element doping. Herein, P-MoS 2 /rGO materials were synthesized using a solvent-assisted hydrothermal method. The MoS 2 nanosheets were uniformly and vertically grown on rGO; meanwhile, the optimized structure of MoS 2 was achieved by P doping, resulting in improved catalytic performance and structural stability. Under alkaline conditions, the P-MoS 2 /rGO catalyst exhibits good electrocatalytic activity, demonstrating a Tafel slope of 70.7 mV dec −1 and an overpotential of 172.8 mV at 10 mA/cm 2 . Notably, even after 3000 consecutive LSV tests, the curves still show a high degree of overlap, indicating exceptional stability.
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International Journal of Electrochemical Science
·
2024
·
IF 1.3
Ganwen Zhang,Junjie You,Qi Chen,Zhijin Xiong,Yourong Wang,Siqing Cheng
It is of unprecedented significance to surmount the daunting challenges of lithium-sulfur battery due to its low cost and exceptionally high energy density. Herein, the mesoporous NiCo 2 S 4 @rGO nanocomposites were fabricated solvothermally with mesoporous NiCo 2 S 4 nanoparticles dispersed on rGO and investigated as highly-efficient carriers for sulfur cathode in lithium-sulfur battery. The as-obtained NiCo 2 S 4 @rGO nanocomposites are featured with abundant mesopore, good electronic and ionic conductivity, excellent catalytic effect on the redox of lithium polysulfides conversion and strong adsorption, thus observably accelerating the redox kinetics of lithium polysulfides and suppressing the shuttle effect. Therefore, the NiCo 2 S 4 @rGO@S electrode delivers a high reversible specific discharge density of 785 mAh g −1 at 0.1 C after 100 cycles and exhibits good rate capability and cycling stability, verifying its great promising for the commercial application of lithium-sulfur battery.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Kuikun Gu,Xinyue Du,Xueying Song,Yu Wang,Zhongbao Luo,Xiaodong Yang,Mingzhe Zhang
The ternary metal oxides that combine two different metal cations is an interesting candidate as sensing material based on their interesting properties. Hence, ordered dendrite InWO 4 was successfully synthesized via a hydrothermal method, followed by the construction of an InWO 4 -rGO heterojunction to enhance detection capability for triethylamine (TEA) gas. The synthesized product underwent morphology and elemental composition analysis using various techniques. Gas sensing experiments revealed that the InWO 4 -rGO gas sensor, operating at the optimal temperature of 220 ℃, displayed a significantly improved response to 100 ppm TEA, with a high value of 59.5, in comparison to the pure InWO 4 gas sensor (11.5 at 250 ℃). Additionally, the recovery time was reduced from 184 s to 122 s. Based on experimental data and gas sensing reaction theory, this study attributes the improved gas sensing performance to the formation of p-n heterojunction, a larger specific surface area and rGO's catalytic effect. This study not only introduces a novel addition to the gas sensing material family but also promotes the development of advanced gas sensors.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qi Li,Huiqing Liao,Donghua Wang,Shang Yang,Yi Zeng,Fazheng Qiu,Lijie Jiang
The breach of dielectric-magnetic properties severely impairs the impedance matching and microwave attenuation. Graphene, which possesses superior dielectric and conductive characteristics, has been recognized as a potential electromagnetic (EM) functional material. However, the lack of magnetic response undermines the dielectric-magnetic balance of graphene, eventuating the impedance mismatch and weak microwave attenuation. Modulating the EM parameters to stimulate microwave propagation and attenuation is an ingenious strategy for premium microwave attenuation materials. Herein, the controlled titration chemical reduction and annealing were engaged to facilitate the in-situ growth of Ni nanoparticles on reduced graphene oxide (rGO). The self-assembly Ni/rGO nanocomposites harbor the rich heterointerfaces and reticulum-like microporous to bridge the dielectric-magnetic gap and manipulate well-matched impedance matching. Correspondingly, the maximum reflection loss of −37.5 dB was performed at 2.0 mm, and the effective absorption bandwidth of 5 GHz was achieved within 1.6 mm. Theoretical simulation of radar cross-sectional (RCS) has been developed, and the prominent RCS reduction value of 25.68 dB·m 2 was obtained with the detection theta of 0°. This work is an exciting step forward in the potential for tailoring superior microwave absorption materials through the manipulation of the dielectric-magnetic balances.
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