JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 24
·1-14
·
IF 2.8
Ni Xiaoqi,Fu Wenwen,Wang Hui-Ya,Xu Xiangyang,Zhu Yaofeng
The growing demand for intelligent wearable devices has put forward new challenges for flexible and high-performance microwave-absorbing materials. Traditional powder-based electromagnetic wave absorbing materials are restricted by their rigidity and bulkiness, making them unsuitable for intelligent, flexible wearable devices. Herein, flexible ZnO/rGO@PET composite fabrics were successfully fabricated by choosing polyester knitted fabric as an elastic scaffold and then adhering ZnO/rGO through impregnation and hydrothermal treatment process. The morphology of ZnO presents needle, flake, and coralline-clustered structures, which are regulated by controlling the growth rate of ZnO seeds along the c-axis in a strong polar ion environment. Among them, the flake-like ZnO synthesized in a 0.050 mol/L growth solution exhibits a looser porous structure, which would significantly enhance impedance matching and multiple internal reflections. Furthermore, flake-like ZnO has a higher electric dipole moment, which can provide stronger dipole polarization and interface polarization. Notably, the ZnO/rGO@PET composite fabric with flake-like ZnO achieves the optimal minimum reflection loss ( RL min ) of -70.76 dB and an effective absorption bandwidth (EAB) of 4.20 GHz (8.2–12.4 GHz). Furthermore, adjusting the stacking sequence of functional fabric layers could effectively control the electromagnetic parameters and corresponding microwave absorption performance, which is well maintained after repeated washings. This work provides a novel strategy for designing next-generation tunable electromagnetic textiles.
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Chemosensors
·
2024
·Vol. 12
·期 5
·82
·
IF 3.7
Minghui Yu,Chongyang Qin,Zhi Yu,Biao Sun,Dejiang Ni,De Zhang,Pei Liang
Surface-enhanced Raman scattering (SERS) provides an alternative rapid detection method for pesticide residues in food, but fenvalerate possesses poor affinity to the novel metal substrate, thus restricting its analysis. To break this bottleneck, a SERS-active platform with an Ag/rGO composite structure was engineered using a facile method for fenvalerate detection. Ag nanoparticles with a 60 nm diameter can grow evenly on the top and bottom of rGO layers under intense ultrasonic oscillation, and rGO in hybrid material acts as an ideal hotspot holder between the gaps of Ag nanoparticles, not only allowing the interaction area to be enhanced both electromagnetically and chemically but also enabling the capture and enrichment of fenvalerate pesticide molecules into the “hotspot” area to improve detection sensitivity. Ag/rGO composite substrate possesses superior SERS performance with an ultralow detectable concentration of 4-aminothiophenol (10−10M) and good reproducibility, endowing the material with a better enhancement effect than pure Ag nanoparticles. When used as the SERS substrate for fenvalerate detection, Ag/rGO composite material showed excellent performance in both experiments and theoretical calculation, with the limit of detection (LOD) of fenvalerate being as low as 1.69 × 10−5mg/kg and a detection model with an R2of 99.2%, demonstrating its exciting potential as a SERS substrate for pesticides detection.
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Advanced Energy Materials
·
2019
·Vol. 9
·期 36
·1901896
·
IF 24.884
Wenzhi Tian,Baojuan Xi,Zhenyu Feng,Haibo Li,Jinkui Feng,Shenglin Xiong
Lithium-sulfur batteries (LSBs) have been regarded as a competitive candidate for next-generation electrochemical energy-storage technologies due to their merits in energy density. The sluggish redox kinetics of the electrochemistry and the high solubility of polysulfides during cycling result in insufficient sulfur utilization, severe polarization, and poor cyclic stability. Herein, sulfiphilic few-layered MoSe 2 nanoflakes decorated rGO (MoSe 2 @rGO) hybrid has been synthesized through a facile hydrothermal method and for the first time, is used as a conceptually new-style sulfur host for LSBs. Specifically, MoSe 2 @rGO not only strongly interacts with polysulfides but also dynamically strengthens polysulfide redox reactions. The polarization problem is effectively alleviated by relying on the sulfiphilic MoSe 2 . Moreover, MoSe 2 @rGO is demonstrated to be beneficial for the fast nucleation and uniform deposition of Li 2 S, contributing to the high discharge capacity and good cyclic stability. A high initial capacity of 1608 mAh g −1 at 0.1 C, a slow decay rate of 0.042% per loop at 0.25 C, and a high reversible capacity of 870 mAh g −1 with areal sulfur loading of 4.2 mg cm −2 at 0.3 C are obtained. The concept of introducing sulfiphilic transition-metal selenides into the LSBs system can stimulate engineering of novel architectures with enhanced properties for various energy-storage devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Guangfa Zhang,Yuekang Zhang,Jingxian Jiang
Given the ever-growing global water resource crisis, exploiting multifunctional materials featuring with high interfacial solar steam generation efficiency and good purification capability to achieving seawater desalination and wastewater treatment simultaneously are highly desired, yet it still remains a huge challenge to date. Herein, robust and multifunctional MXene/rGO (MRGA) and polydopamine & chitosan @ MRGA (CS&PDA@MRGA, CPM) three-dimensional composite aerogels with distinct interconnected cellular architecture were developed via a facile ice template-assisted chemical reduction self-assembly technology and subsequent sequential deposition modification. Due to the favorable graphene oxide-assisted assembly behavior, the resultant aerogels displayed a desirable mechanical robustness along with an excellent lightweight property. Benefiting from the strong electrostatic interaction deriving from aerogel surface moieties and dye molecules, MRGA-12 exhibited a prominent adsorption capability towards various dyes and achieved a superb adsorption capacity of up to 396.05 mg/g for malachite green (MG). Moreover, by virtue of the synergistic effect between the intentionally regulated low reduction degree of rGO and the integration of PDA and CS, CPM-12 achieved a dramatically reduced evaporation enthalpy of water from 2256 to 1617.18 J/g. Accordingly, this distinct feature resulted in an extraordinary solar-driven interfacial evaporation performance with a remarkable evaporation rate of 1.86 kg/m 2 /h and a high evaporation efficiency of 83.28 % under 1 sun illumination. Therefore, together with the terrific oil/water separation capability, these novel MXene-based aerogels hold a great potential for high-performance solar-driven interfacial evaporation and wastewater treatment.
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Xiaoting Liu,Yingyi Ma,Yu Si,Xinzheng Li,Xinran Li,Jingfang Li
Conducting polymers hold great prospects in energy storage, especially in the field of flexible energy storage, however, their broad applications are limited due to the poor processability, difficulty in structural design diversity and unsatisfactory performance when used alone. Herein, the processability of PEDOT in organic phase is significantly enhanced by surfactant modification via a self-assembly process, contributing to the convenient and low-cost construction of 3D PEDOT architecture. Importantly, the PEDOT and rGO can be introduced into the same porous structure synchronously and conveniently. Superior capacitive performance is shown for the porous PEDOT/rGO film benefits from the combination of PEDOT with excellent electrochemical stability, rGO with high conductivity and porous structure with abundant active sites and chambers for electrolyte storage. The porous PEDOT/rGO film can be used as a scaffold for the deposition of conductive polymers. For example, once PPy is deposited, a high specific capacitance of 407.8 F g -1 at a current density of 0.5 A g -1 , accompanied by a prominent capacitance retention of 90% after 5000 cycles are achieved. When it is used to construct the symmetric supercapacitor (SSC), a high energy density of 52.9 Wh kg -1 at the power density of 200.2 W kg -1 is delivered, with a high capacitance retention of 85%. Moreover, it shows excellent mechanical flexibility upon multiple bending cycles, rendering great potential in portable or wearable energy storage devices.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Wenwen Liu,Zhibin Mao,Qiancun Zhu,Peikai Luo,Jie Chen,Zongyi Ye,Yu Cao
Utilizing selective laser texturing technology, calcium titanate integrated with reduced graphene oxide (CTO/rGO) films is prepared with patterned surface which was endowed for the first time with dual functions of hydrophilicity and anti-reflection, aiming to improve the reusability of photocatalyst and to enhance the practicability of photocatalytic degradation technology. The patterned film was verified to possess excellent photocatalytic activity and recyclability, the pseudo-first-order rate constant k of which was improved up to 45 % compared with the primitive film and even much better than of the CTO/rGO photocatalyst powder. In addition, the degradation rate of the used film can be significantly recovered to 89.06 % after combined treatment with ultrasound and UV, maintaining its long-term stable degradation ability. On the one hand, the improved hydrophilicity was beneficial to increase the contact area between the contaminants and the photocatalytic film surface, which will provide more reaction sites and make it much easier to remove the residual dye absorbed on the surface; on the other hand, the enhance of anti-reflection performance will improve the utilization rate of the incident light, thus increasing the photocatalytic activity of the patterned film. This study provides new ideas and methods for the preparation of efficient and stable photocatalytic film.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Yujie Zhang,Zexin Cui,Rongfang Yuan,Huilun Chen,Beihai Zhou
As the persistent contamination of water sources with antibiotics poses a growing environmental challenge, effective strategies for the degradation of such pollutants are urgently needed. Herein, a novel organic-inorganic Z-scheme heterojunction material, reduced Graphene Oxide (rGO)@PANI/SnO 2 , was prepared for the photocatalytic degradation of sulfadiazine (SD). When the PANI/SnO 2 with PANI doping amount of 1% was loaded on 1% rGO, the catalyst showed the best photocatalytic activity, with a reaction rate constant of 0.184 h -1 , which was 32.8 and 7.19 times higher than that of PANI and SnO 2 , respectively. The improved photocatalytic activity was mainly due to the high electrical conductivity of rGO and the formation of a Z-scheme heterojunction between PANI and SnO 2 , which effectively facilitated the transfer of photogenerated carriers. Quenching experiments showed that ·OH is the main active species. Besides, Density Functional Theory (DFT) calculations found that the sulfonamide bond and pyrimidine heterocyclic were vulnerable site in the SD. Then, four possible degradation pathways were proposed, primarily involving the breaking of the sulfonamide bond and the ring-opening of the pyrimidine heterocycle. The response surface method (RSM) was used to confirm that the removal of SD was affected by the single factor of initial SD concentration, pH value and catalyst dosage, and the magnitude of the effect of different parameters was in the order of pH > catalyst dosage > SD concentration. It was found that Cl - and SO 4 2- inhibited the photocatalytic process, whereas HCO 3 - facilitated the process through its ability to produce ·OH by hydrolysis and provide a weakly alkaline environment. This work provides novel ideas for the preparation of organic-inorganic heterojunction photocatalysts and enhances the application of organic materials in the photocatalytic degradation of antibiotics in water.
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Biomaterials Science
·
2017
·Vol. 5
·期 5
·990-1000
·
IF 4.21
Ying Yang,Yunlong Wang,Manzhou Zhu,Yan Chen,Yazhong Xiao,Yuhua Shen,Anjian Xie
A reduced graphene oxide (RGO)/gold nanorod (AuNR)/hydroxyapatite (HA) nanocomposite was designed and successfully synthesized for the first time. An anticancer drug, 5-fluorouracil (5FU), was chosen as a model drug to be loaded in RGO/AuNR/HA. The fabricated RGO/AuNR/HA-5FU showed robust, selective targeting and penetrating efficiency against HeLa cells due to the good compatibility and nontoxicity of HA, and showed excellent synergetic antitumor effects through combined chemotherapy (CT) by 5FU and photothermal therapy (PTT) by both RGO and AuNRs under near-infrared (NIR) laser irradiation. More importantly, this synergistic dual therapy based on RGO/AuNR/HA can also minimize side effects in normal cells and exhibits greater antitumor activity because of a multi-stage drug release ability triggered by the pH sensitivity of HA in the first stage and the combined photothermal conversion capabilities of RGO and AuNRs by means of the NIR laser irradiation in the second stage. This study suggests that the novel RGO/AuNR/HA multi-stage drug delivery system may represent a promising potential application of multifunctional composite materials in the biomedical field.
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ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Guiyin Li,Min Chen,Bo Wang,Chaoxian Wang,Guanxiong Wu,Jintao Liang,Zhide Zhou
Golgi protein 73 (GP73) is a new type of marker that can specifically detect hepatocellular carcinoma (HCC). Herein, a dual-signal sandwich-type electrochemical aptasensor for GP73 determination was constructed on the basis of hemin-reduced graphene oxide-manganese oxide (H-rGO-Mn 3 O 4 ) nanozymes. [email protected] ( o -phenylenediamine) ( [email protected] ) nanohybrids with a large specific surface area and conductance were co-electro-deposited onto a screen-printed electrode (SPE) surface to immobilize GP73 capture aptamer 2 (Apt2). H-rGO-Mn 3 O 4 nanozymes were used not only to immobilize amino functionalised GP73 aptamer 1 (Apt1) as the detection probe, but also to serve as an in-situ redox signal indicator because of the redox reaction of Hemin (Fe(Ш)/Hemin(Fe(II)). In addition, given their excellent peroxidase-like activity, H-rGO-Mn 3 O 4 nanozymes can catalyse the decomposition of H 2 O 2 and oxidation of substrate (3,3′,5,5′-tetramethylbenzidine, TMB) to oxTMB, which is used as another redox signal. In the presence of the target GP73, the two aptamers specifically bind to the target, thereby affecting two electrochemical signals. Under optimal conditions, the dual-signal sandwich-type electrochemical aptasensor had a salient analytical performance. The two electrochemical redox signals linearly increase with the logarithm of the GP73 concentration in the range of 0.01–100.0 ng/mL with the limit of detection (LOD) of 0.0071 ng/mL and sensitivity of 2.441 μA/μM/cm 2 . Moreover, the recovery of human serum samples ranged from 98.66% to 121.11%. Furthermore, the two redox signals can simultaneously corroborate each other, thereby preventing missed diagnosis and misdiagnosis. All the results can provide new insights into the clinically effective determination of HCC.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 3
·1685-1696
·
IF 1.134
Wang Weijing,Han Na,Yang Chao,Zhang Wenxin,Miao Jinlei,Li Wei,Zhang Xingxiang
The process in which the nanofiber membrane is used to remove heavy metal ions and separation of oil-water solution is analyzed. Herein, smooth structures are induced by rGO-g-PAO sheets, which could be attributed to the strong interaction between P(AN-MA) and rGO-g-PAO. It is rewarding
to note that the P(AN-MA)/rGO-g-PAO nanofiber membrane would exhibit superhydrophilic traits in the air and ultra-low oil-adhesive traits underwater when the concentration of P(AN-MA) and PAO is 13 wt.% and 0.3 wt.%, respectively. The amidoxime (–C(NH2) NOH) groups on the
membrane surface can efficiently adsorb copper (Cu(II)) (1.65 mmol/g) and chromium (Cr(VI)) (4.70 mmol/g) ions in the waste water. Meanwhile, the P(AN-MA)/rGO-g-PAO nanofiber membrane exhibits ultrahigh flux (~6150 LMH), satisfying rejection rate (~97%) and outstanding flux recovery ratio
(~99%) in separating oil water emulsion.
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ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Lingna Sun,Qingwei Deng,Yongliang Li,Libo Deng,Yanyi Wang,Xiangzhong Ren,Peixin Zhang
Ternary copper oxides/reduced graphene oxide (Cu 2 O-CuO-RGO) composites were successfully synthesized in situ by a self-assembly solvothermal method in a water-ethanol mixture and used directly as the anode material for lithium ion batteries . The Cu 2 O-CuO-RGO composites delivered a reversible capacity of 842.5 mAh g −1 after 80 cycles at a current density of 100 mA g −1 , and after every 10 cycles at current densities of 100, 200, 500, 1000, 2000, 5000 and 100 mA g −1 , respectively, the specific capacities of the composites were approximately 840, 723, 511, 402, 336, 224, and 703 mAh g −1 , respectively. The improved electrochemical performance of the composites is closely related to its sandwich structure, with multicomponent Cu 2 O-CuO nanospheres adhering tightly to both sides of RGO nanosheets . This structure could shorten the transport pathways for both electrons and lithium ions , prevent the RGO nanosheets from stacking, enhance the electrical conductivity and accommodate the volume expansion that occurs during prolonged cycling.
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Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 6
·2702-2714
·
IF 6.482
Arnauld Robert Tapa,Wanchun Xiang,Abdelaal. S. A. Ahmed,Senwei Wu,Bin Li,Qiufen Liu,Chawuch Machar Jacob Chuti,Xiujian Zhao
In this work, we employ a simple hydrothermal method to synthesize a metal–organic framework (MOF) derived selenide from a reduced graphene oxide (rGO)/structured zeolitic imidazolate framework (ZIF). The resulting MOF-derived selenide (rGO/ZnSe/CoSe2) consists of porous nanowires encapsulated in a carbon matrix and having a high surface area (169.30 m2 g−1). This porous rGO/ZnSe/CoSe2 is combined with polystyrene sulfonate-doped poly(3,4-ethylenedioxythiophene) (PEDOT:PSS) for use as a CE for DSSCs. CEs based on different weight percentages (1, 3, and 5 wt%) of rGO/ZnSe/CoSe2 powder in PEDOT:PSS solution are compared with the commonly used platinum (Pt) based CE. The rGO/ZnSe/CoSe2–PEDOT:PSS composite benefits from the synergistic effects between porous rGO/ZnSe/CoSe2 having a high surface area and PEDOT:PSS which holds superior conductivity and strong binding capability with a fluorine-doped tin oxide (FTO) glass substrate. Therefore, the 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite based CE achieved a good stability and superior electrocatalytic activity compared to Pt CE. Furthermore, DSSCs based on a 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE achieved a higher power conversion efficiency (PCE) of 8.60%, compared to the PCE of the Pt CE based DSSC (7.14%) prepared under similar conditions. This work has revealed a new approach to prepare MOF-derived selenide based CEs with high electrocatalytic activity without any calcination. In addition, we demonstrated that the low-cost 3 wt% rGO/ZnSe/CoSe2–PEDOT:PSS composite CE is an excellent candidate to replace Pt CE in DSSCs.
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