CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Dinh-Trinh Tran,Thi-Phuong-Thao Vu,Santi Kongmany
In this study, ZnFe 2 O 4 , BiVO 4 , and ZnFe 2 O 4 /BiVO 4 /rGO materials were synthesized using the hydrothermal method in mild conditions to study the oxytetracycline (OTC) degradation process. The results on surface morphology, functional group, structure, and optical and electrochemical characteristics revealed that ZnFe 2 O 4 /BiVO 4 /rGO were successfully prepared with high purity and good distribution of chemical elements. The impact of different parameters like pH, catalyst load, reaction time, initial OTC concentration, and the presence of ozone-nanobubbles on the OTC degradation efficiency was systematically examined to obtain optimal treatment conditions. Synergic effects between ozone-nanobubbles and ZnFe 2 O 4 /BiVO 4 /rGO heterojunction led to an enhancement of over 20 % of OTC degradation yield. The OTC degradation reached 96.3 % within 100 min at optimal conditions (pH 7.0, [Cat.] = 0.5 g/L, and [OTC] = 20 mg/L). The combination of ZnFe 2 O 4 and BiVO 4 allowed to benefit from the generation of both effective electrons and holes, which enhanced the generation rate of both superoxide and hydroxyl radicals responsible for degrading the pollutant in water while rGO sheets contributed to slowing down the recombination rate between electrons and holes and improving the photocatalytic activities of the ZnFe 2 O 4 /BiVO 4 /rGO. Liquid chromatography-mass spectrometry (LC-MS) analyses were deployed to figure out intermediate substances and possible degradation pathways of the OTC degradation process. The ZnFe 2 O 4 /BiVO 4 /rGO heterojunction exhibited a pretty good durability and stability, and was easily recovered with the aid of a magnet. The toxicity of the by-products was significantly declined compared to the OTC antibiotic.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
He Wang,Hongling Guo,Zihao Huang,Weiliang Liu,Mei Li,Jinshui Yao,Jiaxi Cui,Yuanhao Wang,Manman Ren
The high activity barriers of Li 2 S nucleation and deposition limit the redox reaction kinetics of lithium polysulfides (LiPSs), meanwhile, the significant shuttle effect of LiPSs hampers the advancement of Li-S batteries (LSBs). In this work, a NiSe 2 /CoSe 2 -rGO (NiSe 2 /CoSe 2 -G) sulfur host with bifunctional catalytic activity was prepared through a hard template method. Electrochemical experiment results confirm that the combination of NiSe 2 and CoSe 2 not only facilitates the bidirectional catalytic function during charge and discharge processes, but also increases the active sites toward LiPSs adsorption. Simultaneously, the highly conductive rGO network enhances the electronic conductivity of NiSe 2 /CoSe 2 -G/S and provides convenience for loading NiSe 2 /CoSe 2 catalysts. Benefitting from the exceptional catalytic-adsorption capability of NiSe 2 /CoSe 2 and the presence of rGO, the NiSe 2 /CoSe 2 -G/S electrode exhibits excellent electrochemical properties . At 1C, it demonstrates a low capacity attenuation of 0.087 % per cycle during 500 cycles. The electrode can maintain a discharge capacity of 927 mAh/g at a sulfur loading of 3.3 mg cm −2 . The bidirectional catalytic activity of NiSe 2 /CoSe 2 -G offers a prospective approach to expedite the redox reactions of active S, meanwhile, this work also offers an ideal approach for designing efficient S hosts for LSBs.
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PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 2
·1-15
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IF 23.2
Bi Xiaoyu,Shi Yang,Ge Shengbo,Xu Ben Bin,Li Xia,He Ximin,Huang Runzhou
Reduced graphene oxide (rGO) and MXene have garnered significant attention due to their exceptional pseudocapacitance and electrical conductivity that are viable in energy storage applications. Nevertheless, the challenge of self-restacking between the 2D material surfaces and the tendency of MXene to oxidise has posed obstacles to their further utilisation. This prompted researchers to use cellulose nanofibre (CNF) as a prospective “bridge” to connect the two materials. This approach has been shown to prevent MXene from oxidising while facilitating GO conversion into rGO via reduction. Consequently, 3D macroporous Ti 3 C 2 T x MXene/cellulose nanofibres/reduced graphene oxide (MCG) aerogels have been successfully prepared. A breakthrough in solving the self-stacking problem and creating a sensibly designed 3D macroporous electrode structure has yielded excellent electrochemical capabilities for MCG aerogel electrodes. Specifically at 1.0 mW cm −2 power density, these electrodes have demonstrated an outstanding performance in 5000 cycles with 79.4% retention rate, favourable areal specific capacitance of 671 mF cm −2 and unparalleled energy density of 60.9 mWh cm −2 . Overall, this study offers significant perspectives on the possible uses of 2D materials, especially in terms of adjusting their structure and functionality.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 43
·18558-18568
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IF 2.7
Ali Baqaei,Ali Asghar Sabbagh Alvani,Hassan Sameie,Federico Rosei
We designed and fabricated a photocatalyst made of reduced titanium dioxide nanorods (TiO2−x NRs) that incorporates silver nanoparticles (Ag NPs) and reduced graphene oxide (rGO) sheets, to narrow the band gap and improve the photoinduced degradation of methylene blue (MB). The morphological characterization showed that Ag NPs and rGO sheets were well-deposited on both the top surface and the outer walls of vertically oriented 1D TiO2−x NRs. Energy dispersive spectroscopy and specific surface area analyses confirmed the presence of both Ag NPs and rGO sheets and the as-obtained TiO2−x/Ag/rGO sample exhibited a large specific surface area (153.7 m2 g−1). Moreover, X-ray diffraction patterns contained peaks characteristic of tetragonal rutile TiO2 and confirmed that there is no phase change after reduction treatment. The optical investigation revealed that the formation of Ti3+ ions, surface defects and oxygen vacancies were considered as major reasons for the red shift of the absorption edge towards the visible region (546 nm) compared with pristine TiO2 NRs. The incorporation of Ag NPs and rGO with TiO2−x NRs improved the light absorbance and the narrowing of the TiO2−x bandgap energy (from 2.95 to 1.97 eV) as a result of the SPR effect of Ag NPs and the reduced light reflection in the presence of rGO. Therefore, among the various as-prepared photocatalysts, the TiO2−x/Ag/rGO (2% wt) photocatalyst showed the best performance, degrading almost 100% of MB under 120 min visible light irradiation. Kinetic studies confirmed that degradation reactions over all photocatalysts followed first order kinetics. The photodegradation rate toward MB over TiO2−x/Ag/rGO (2% wt) is 6.45, 1.85, and 1.6 times higher compared to that of pristine TiO2 NRs, TiO2−x and TiO2−x/Ag, respectively. The TiO2−x/Ag/rGO composite proves to be an exceptionally efficient photocatalyst for water treatment.
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SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Ying Zhou,Fengyang Kong,Jiaqing Zhou,Jidan Hu,Guoying Zhu
Waterborne epoxy (WEP) resins have gained considerable attention for their environmentally friendly characteristics. Nevertheless, they are susceptible to substantial failures due to electrochemical corrosion, particularly when the coating is compromised or exposed to harsh corrosion environments. Furthermore, its long-term anticorrosive performance is affected by certain inherent defects. In this study, inspired by the adhesive properties of mussels, polydopamine (PDA) was used as a green binder to integrate graphene oxide (GO), h-M O O 3 , and WEP matrix, creating a uniform three-dimensional (3D) network structure. PDA-modified two-dimensional GO nanosheets can also create a porous carrier capable of loading anticorrosive Mo derivatives, imparting self-healing properties that enhance anti-corrosion performance. The resulting composites exhibited remarkable self-healing ability due to the unique design of the PDA-rGO porous structure infused with anticorrosive MoO 3 . Subsequently, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible spectroscopy were used to confirm the PDA-rGO/MoO 3 nanostructure. The results confirmed the successful self-polymerization of PDA on the GO surface, converting it into reduced GO (rGO). Then PDA-rGO/MoO 3 composite WEP coatings were systematically evaluated by electrochemical impedance spectroscopy (EIS), microscopy and acceleration corrosion experiment. In addition, electrochemical impedance spectroscopy (EIS) and microscopy were used to assess the PDA-rGO/MoO 3 composite coatings. The EIS results revealed that the composite coating with 0.5 wt% PDA-rGO/MoO 3 substantially enhanced the anti-corrosion performance compared with the control samples. After prolonged immersion for 60 days in a 3.5 wt% NaCl solution, the composite coating exhibited outstanding anti-corrosion performance, surpassing that of the GO/WEP coating by three orders of magnitude. This composite nanocoating provides valuable insights into the design of well-dispersed, 3D network-structured coatings with self-healing properties for corrosion protection, which opens up new possibilities for the practical application of composite nanohybrids in the field of anti-corrosive coatings.
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COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Qianhe Ji,Lu Yang,Hui-Ya Wang,Naharullah Jamaluddin,Juan Matmin,Yaofeng Zhu
Multifunctional, responsive electromagnetic wave-absorbing materials (EMAs) with comprehensive performance are crucial for adapting to the ever-changing and extreme electromagnetic environment. To meet the demands of various application scenarios, we developed a compressible and thermally stable polyimide/reduced graphene oxide composite aerogel (PGA) via unidirectional freeze-drying and thermal annealing process. Polyimide endows the composite aerogel with outstanding thermal resistance and superior mechanical strength, with a weight loss of only 5 % at 440 °C and a compressive stress of up to 100 kPa at 60 % strain. Benefiting from the synergistic effect of porous structure and reasonable components, PGA exhibits an excellent minimum reflection loss of −58.32 dB and a broadened effective absorption bandwidth of 7.98 GHz (10.02–18.00 GHz) at a thickness of 3.9 mm. More importantly, compressing aerogels can alter their pore structure and conductive network to achieve high dynamic tunability of electromagnetic parameters, thereby enabling responsive microwave absorption performance. Notably, the PGA-18 successfully realizes complete coverage of the X and Ku bands through strain-induced regulation, confirming its applicability in ultra-broadband electromagnetic wave absorption. Additionally, the axially aligned lamellar structure and high porosity of the aerogel effectively suppress convective heat transfer and reduce thermal radiation, thereby imparting excellent thermal insulation and infrared stealth capabilities under high-temperature conditions. This work provides new insights into the design of multifunctional ultrawider EMAs with tunable electromagnetic characteristics, helping enable the next-generation electronic devices and stealth equipment.
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Minghang Gong,Yihang Cai,Dongwei Wang,Lei Wu,Yong Wang,Gongwang Cao,Yuwei Liu,Quanzhong Guo,Chuan Wang,Yang Li
During marine navigation, ships inevitably encounter corrosion and biofouling from seawater, necessitating anodes with superior performance for impressed current cathodic protection of hulls. In this study, a hybrid material comprising reduced graphene oxide (RGO) and carboxylated multi-walled carbon nanotubes (CNTs), along with a TiO 2 nanotube arrays (TNTs) interlayer, was introduced into a metal oxide-coated electrode. The RGO-CNTs/RuO 2 –IrO 2 –SnO 2 /TNTs electrode was fabricated via thermal decomposition, and its surface morphology, electrocatalytic activity, practical chlorine evolution and antibacterial performance, as well as accelerated life, were systematically evaluated. The underlying mechanisms by which the hybrid material and interlayer enhance anode performance were analyzed. The results indicate that the electrode achieves a difference of 0.430 V between chlorine evolution potential (CEP) and oxygen evolution potential (OEP), with an accelerated life of 232 h. It effectively exerts a stimulatory effect on microorganisms, thereby achieving superior biofouling resistance. This enhancement is likely attributable to the synergistic effects of RGO-CNTs and TNTs, including barrier effects, labyrinth effect, mechanical reinforcement, and optimized electron transport, which collectively improve the electrocatalytic activity and stability of the anode. This study provides valuable theoretical insights for enhancing the activity and stability of coated electrodes, holding significant promise for applications in marine corrosion protection.
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DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Yueyi Li,Yuehui Liu,Xuguang Liu,Xia Li
In this study, rGO/Bi 2 O 2 CO 3 /BiOCl composite photocatalysts were prepared using a one-step solvothermal method . The formation and morphology of these photocatalysts were characterized through XRD , Raman, XPS , SEM , TEM, and other techniques. The efficiency of the composite photocatalysts was assessed by decreasing RhB under visible light . Among them, the photocatalytic activity of 4 wt% rGO/Bi 2 O 2 CO 3 /BiOCl was discovered to be the best, with a degradation rate as high as 96 % within 60 min. This is because the inclusion of rGO not only increased the specific surface area of the ternary materials, but also acted as a carrier for electrons transfer . Besides, the heterojunction structure constituted between Bi 2 O 2 CO 3 and BiOCl also opens up a new pathway for carrier separation. Finally, we explored the degradation mechanism of rGO/Bi 2 O 2 CO 3 /BiOCl ternary materials in detail. This study holds an important reference for the synthesis of bismuth-based composite photocatalysts and has potential applications in wastewater treatment .
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高影响因子
RSC Advances
·
2025
·Vol. 15
·期 23
·18444
·
IF 4.6
Sanoober Bhagat,Sana-ul-Nisa,Tania Ghumro,Jamil A Buledi,Amber R Solangi,S Tufail H Sherazi
The current study uses the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate, also known as BMIM-PF 6 , as a stabilizing agent to synthesize a bismuth oxide/ionic liquid/reduced graphene oxide (Bi 2 O 3 /IL/rGO) hybrid nanomaterial. A range of techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), and UV-visible spectroscopy, were used to characterize the synthesized Bi 2 O 3 /IL/rGO nanocomposite. XRD confirmed that the composite was crystalline, and FTIR analysis suggested the presence of certain functional groups. The main elements oxygen, carbon, and bismuth were confirmed by EDX analysis, and SEM imaging showed an exfoliated and detached morphology. The synthesized nanocomposite was used to modify a glassy carbon electrode to develop a sensor for the detection of lead (Pb 2+ ). The fabricated sensor was characterized using electrochemical impendence spectroscopy (EIS) and cyclic voltammetry (CV). The results indicated that the Bi 2 O 3 /IL/rGO/GCE was more conductive, having a charge transfer resistance ( R ct ) of 428.5 Ω compared to 1870 Ω for the bare electrode. The sensor has a low detection limit of 0.001 μM and a quantification limit of 0.003 μM. When tested on water and soil samples, the sensor was confirmed to have acceptable recovery rates, ranging from 95% to 102%. In conclusion, our fabricated sensor has excellent performance in terms of ease, affordability, energy usage, and quick efficiency. The ionic liquid BMIM-PF 6 was used as stabilizing agent to synthesize Bi 2 O 3 /IL/rGO hybrid nanocomposite. A sensor was developed by modifying the surface of GCE by using hybrid nanocomposite for the detection of Pb 2+ in environmental samples.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Dongju Liu,Kunlan Diao,Daohai Zhang,Yupeng Hu,Zhi Lei,Teng Zhou,Kaixiang Zou,Shuhao Qin
With the popularity of wireless communication technology, the problem of electromagnetic radiation and interference is highlighted, and the development of efficient electromagnetic shielding materials has become a research priority. In this study, firstly, polyvinyl alcohol/sodium alginate (PVA/SA) hydrogels were prepared by physical cross-linking method, and further, iron-based metal-organic frameworks (Fe-MOFs) were prepared by solvothermal synthesis method, and with reduced graphene oxide (RGO) as a conductive filler, and γ-aminopropyltriethoxysilane (KH550) as a cross-linking agent, were prepared by chemical cross-linking method. Modified polyvinyl alcohol/sodium alginate/iron based metal organic framework/reduced graphene oxide (PVA/SA/Fe-MOF/RGO-KH550) composite hydrogel. The results show that the composite hydrogel has a compressive stress of 20.13 MPa, a compressive strain of 83.28 %, and an electromagnetic shielding efficiency of 39.98 dB at a thickness of 3 mm, which reaches the mid-range and high-end level, and it can be applied to industrial control, small and medium-sized data centres, automotive electronics, and general medical devices with medium-high requirements. The excellent performance of the hydrogel comes from the conductive properties and interfacial polarisation effect of RGO, the dielectric loss of Fe-MOF, which work in synergy, and KH550 optimises the interfacial bonding between the filler and the substrate to form a denser crosslinked structure, which strengthens the mechanical properties and electromagnetic shielding effect. The hydrogel preparation process is simple and low-cost, which provides a reference for the design of high-performance electromagnetic shieldingmaterials and an effective solution to the problem of electromagnetic interference.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Jie Hu,Wangwang Guan,Xueqing Xiong,Yong Chen,Haizhu Long
A carbon nanomaterials-modified MOF-derived Co 3 O 4 p–p heterojunction was successfully constructed using a solution-combination-calcination method. The morphological and structural characteristics and their gas sensing performances were comprehensively investigated. Particularly, the synergistic effect between different carbon nanomaterials and Co 3 O 4 mesoporous structures was carefully studied. The gas sensing results revealed that the sensor based on the CNT-rGO-Co 3 O 4 nanocomposites exhibited better gas sensing properties toward the ethanol gas, including higher response, admirable antihumidity, and shorter response–recovery time than the other Co 3 O 4 samples. The gas sensitivity of CNT-rGO-Co 3 O 4 nanocomposites reached to be as high as 127.1, which was 5.8 times higher than that of a pure Co 3 O 4 gas sensor when exposed to 100 ppm ethanol. The enhanced gas sensing performance of the sensor fabricated by the CNT-rGO-Co 3 O 4 nanocomposites could be attributed to the promising synergistic effect between carbon nanomaterials and Co 3 O 4 nanobox, implying that the heterojunction structure and coupling effect would dramatically optimize the gas sensing reaction process, resulting in improved gas sensing performance.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Hailong Wang,Quanqin Hu,Yuan Meng,Zier Jin,Zilin Fang,Qinrui Fu,Wenhua Gao,Liang Xu,Yibing Song,Fushen Lu
Reduced graphite oxide (rGO) was incorporated into a metal organic framework (MOF) MIL-101(Cr) for the modification of carbon paste electrode. Taking advantages of the large surface area of MOF and the electrical conductivity of rGO, the resulted electrodes exhibited high sensitivity and reliability in the simultaneous electrochemical identification and quantification of catechol (CC) and hydroquinone (HQ). Specifically, in the mixture solution of catechol and hydroquinone (constant concentration of an analyte), the linear response ranges for catechol and hydroquinone were 10–1400 μM and 4–1000 μM, and detection limits were 4 μM and 0.66 μM (S/N = 3) for individual catechol and hydroquinone, respectively. Therefore, the relatively easy fabrication of modified CPE and its fascinating reliability towards HQ and CC detection may simulate more research interest in the applications of MIL-101(Cr)-rGO composites for electrochemical sensors.
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高影响因子
危险品化学品经营许可证（带存储）