PLASMA SCIENCE & TECHNOLOGY
·
2021
·Vol. 23
·期 11
·115503
·
IF 1.567
Xinghao LIU,Cheng CHENG,Zimu XU,Shuheng HU,Jie SHEN,Yan LAN,Paul K CHU
Tetracycline (TC) is an antibiotic mainly used in livestock production and respiratory infection. Traditional methods are not effective in removing TC from solution. In this study, TC was degraded by gas–liquid plasma in the presence of rGO-TiO2 in solution. The rGO-TiO2 was prepared by modified hummers and hydrothermal method. The electrical and optical properties of the gas–liquid discharge plasma were studied and the produced long-lived reactive species were analyzed by spectrophotometer. The degradation efficiency of TC was improved by 41.4% after plasma treatment for 12 min in presence of 30 mg l−1 rGO-TiO2 compared to that with plasma alone. The degradation efficiency increased with increasing discharge power, but as the initial concentration was increased from 20 to 80 mg l−1, the degradation efficiency of TC decreased. The initial pH had no significant effect on the degradation of TC. The intermediate products were determined by UV–vis spectrophotometry and ESI (+)–MS, and the degradation mechanism was analyzed. The reactive species, including O3, ·OH, and H2O2, etc., produced in the plasma/catalyst system attracted electron-rich functional groups (amino group, aromatic ring, and double bond). Therefore, the gas–liquid plasma/catalyst system could be an effective and promising method for pharmaceutical wastewater treatment in future.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2017
·Vol. 19
·期 5
·1-11
·
IF 2.02
Feng Jiantao,Wang Yechen,Hou Yanhui,Li Liangchao
Hierarchical structured ZnFe 2 O 4 @reduced graphite oxide@TiO 2 (ZnFe 2 O 4 @RGO@TiO 2 ) nanocomposite was prepared by an electrostatic layer-by-layer route, which played a synthetic effect of Fenton oxidation of ZnFe 2 O 4 and photocatalytic oxidation of TiO 2 to degrade fulvic acid (FA) solution under visible-light irradiation. In this method, RGO, as the middle layer, can effectively promote the photo-induced electron flow between the ZnFe 2 O 4 and TiO 2 and further improve the efficiency of the photo-Fenton oxidation. The influencing factors on photo-Fenton oxidation, including solution pH, catalyst, and H 2 O 2 dosage, have also been investigated. The results illustrated that the ternary composite presented the enhanced catalytic performance. Under visible light irradiation, the degradation efficiency of the sample on the FA solution can reach 95.4% within 3 h. In addition, the catalyst exhibited superior stability and reusability, and its degradation efficiency was still up to 90% after 5 cycles. Therefore, the composite will be a kind of efficient photocatalyst and had a promising application for visible-light driven destruction of organic pollutants.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Shuguo Yu,Hongyan Zhang,Jun Zhang,Ziyan Hu
Respiratory monitoring is an effective method to assess human health and provides valuable information for early warning and diagnosis of respiratory diseases. However, respiratory monitoring equipment relies on traditional power supply model, which limits real-time monitoring of breathing in fields of outdoor adventure, nomadism and long-distance running. As a solution, a triboelectric nanogenerator (TENG)-driven self-powered humidity sensor for human breath monitoring was prepared. A flexible TENG composed of Ti 3 C 2 T x : PDMS composite film and Ni/Cu polyurethane foam sponge was used as self-powered part of the device, RGO-TiO 2 humidity sensor was used as the respiratory sensing part of the device. Compared with the traditional humidity sensor, TENG-driven self-powered RGO-TiO 2 (TENG-RGTO) shows high response (359.2), fast response/recovery time (1/5.2 s), good reversibility, small humidity hysteresis (0.54%) in the range from 0% RH to 95% RH. Furthermore, TENG-RGTO humidity sensor can realize recognition of breathing states at different frequencies and intensities in real time. Meanwhile, a breathing alarm device driven by humans is designed. This research not only broadens the application range of TENG but also provides a new design idea for self-powered breathing monitoring sensor.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Zhiwei Zhou,Junyan Chen,Haikuan Yu,Yuantian Zhao,Xing Li,Jiawei Ren
Secondary effluent organic matter (EfOM) significantly contributes to membrane fouling in ultrafiltration (UF) systems, which limits their broader use in municipal wastewater recycle. A modified ceramic ultrafiltration membrane (MCUM) was synthesized via vacuum filtration and thermal treatment and then activated under ultraviolet (UV) irradiation. The results indicated that the MCUM-2.88 exhibited the most excellent removal of EfOM, effectively retained high molecular weight (MW) proteinaceous substances, and converted medium MW humic-like compounds into lower MW derivatives. Through parallel factor analysis in conjunction with the self-organizing map algorithm, it was observed that the MCUM primarily degraded aromatic, high MW fluorescent components, while tryptophan-like substances remained as dominant residues due to their resistance to photodegradation. Additionally, the improved surface roughness and hydrophilicity of the MCUM facilitated fouling mitigation by strengthening interfacial repulsion, which diminished foulant adhesion. The fouling mechanism transitioned from complete and intermediate blocking to predominantly intermediate blocking, accompanied by a reduction in gel layer fouling. Consequently, the reversible fouling resistance of the MCUM was reduced by 76.8 %, and the irreversible resistance by 34.3 %, markedly enhancing antifouling performance. The results underscore the effectiveness of MCUM in advanced municipal wastewater treatment, showcasing enhanced antifouling performance and strong potential for sustainable water reuse applications.
研究领域:
环境工程
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膜科学
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水处理
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催化
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材料科学
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产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Yunfei Yan,Chenghua Zhang,Tao Jia,Haojie Li,Kaiming Shen
Aimed at achieving high efficiency of photocatalytic hydrogen production from ammonia borane (NH3BH3, AB), a reduced graphene oxide (rGO)-modified TiO2 photocatalyst was proposed for hydrogen production. In this study, rGO/TiO2 photocatalysts with different rGO contents were prepared and characterized by XRD, UV–vis DRS, FTIR, Raman, and SEM. The experimental results showed that addition of rGO can reduce the band gap energy of TiO2, and the band gap energy of rGO/TiO2 varies with the content of rGO, and 1% rGO/TiO2 has the lowest band gap energy of 2.96 eV. This indicates that the modification of TiO2 by rGO not only increases the probability of electron transition but also promotes the separation of photoelectron and hole pairs due to the good conductivity of rGO so as to improve the quantum efficiency of photocatalysis. In addition, compared with pure TiO2, rGO/TiO2 shows a certain photocatalytic activity under the condition of light irradiation. Among the rGO/TiO2 photocatalysts with different contents of rGO, 1% rGO/TiO2 shows the best photocatalytic performance of ammonia borane hydrolysis, and the value of turnover frequency is 1088.93 μmol·min–1·g–1. Furthermore, the catalyst 1% rGO/TiO2 shows perfect reusability, and its catalytic activity did not decrease significantly even after five reaction cycles.
研究领域:
材料科学
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化学工程
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光催化
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氢能
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产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 4
·2345-2355
·
IF 2.4
Zhang Yi,Liu Yanmeng,Xu Wanzhen,Huang Weihong,Chen Ting,Ding Hua,Wang Baozhi,Yang Wenming
In recent years, the detection and monitoring of cadmium (Cd(II)) have gained considerable attention due to its widespread applications in various industries, such as electronics, batteries, and coatings, and its classification as a highly hazardous pollutant. This study presents the development of a novel electrochemical sensor based on ion-imprinted polymers (IIPs) and reduced graphene oxide-titanium oxide (rGO@TiO 2 ) for the selective and sensitive detection of Cd(II). Under optimized experimental conditions, the electrochemical sensor displayed a satisfactory linear relationship in the concentration range of 10 −8 to 10 −5 mol L −1 , with a lowest detection limit of 1.2 × 10 −8 mol L −1 . The sensor exhibited excellent repeatability, stability, high sensitivity, and strong selectivity. Finally, the electrochemical sensor was successfully applied to determine trace Cd(II) in practical samples. This novel electrochemical sensor based on IIPs and rGO@TiO 2 holds great potential for practical applications in environmental monitoring and pollution control, providing a promising tool for the accurate and efficient detection of hazardous pollutants like Cd(II).
研究领域:
环境科学
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分析化学
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材料科学
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电化学
✓ 已验证
DOI
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2019
·
IF 2.263
Xiaoya Li,Shun Wang,Jingang Xie,Jianfeng Hu,Heqing Fu
Polyurethane acrylate (PUA)-supported rGO/TiO2 electrical conductive and antibacterial nanocomposites were synthesized via in-situ polymerization. The well-dispersed rGO/TiO2 can serve as photoinitiator and give PUA material antibacterial property at the same time. The excellent UV-curing and antibacterial activity could be explained that the synergistic effect of rGO and TiO2, which could promote the effective electron/hole separation and thus generate various reactive species. After dopped the rGO/TiO2 into the PUA matrix, the PUA film became electric conductive. The obtained nanocomposites will have promising applications in high performance antibacterial coatings.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Zhuang Wang,Xiaofeng Xie,Xiao Wang,Asad Mahmood,Hanxun Qiu,Jing Sun
In realistic Volatile organic compounds (VOC)-containing polluted air, VOCs often do not exist alone, but different VOCs coexist. The interaction between different VOCs affects their photodegradation. However, few studies have focused on the photodegradation of mixed VOCs. Herein, rGO-TiO 2 photocatalysts were synthesized by a modified refluxing-solvothermal method, and applied to photocatalytic degradation of single VOC (p-xylene and ethylene) and VOC mixture (containing benzene, toluene, p-xylene). It was found that rGO-TiO 2 possessed higher photocatalytic degradation activity for single VOC and VOC mixture than pure TiO 2 . The increased single VOC adsorption capacity, more efficient light harvesting ability, and enhanced separation efficiency of electron-hole were responsible for improved degradation performance of rGO-TiO 2 . In addition, superoxide radicals played a more important role than hydroxyl radicals for removing both p-xylene and ethylene. Interestingly, commercial TiO 2 (P25) underwent decreased efficiency (80.0% to 63.8%) in photodegrading from single p-xylene to p-xylene in VOC mixture, while it was remained unchanged (93.5%–93.0%) for T0.2G (0.2% mass ratio of reduced graphene oxide to TiO 2 ). This could be mainly attributed to sufficient adsorption sites provided by rGO sheets to mitigate competitive adsorption. Simultaneously, its photocatalytic activity showed no obvious decrease after five photodegradation cycles of mixed VOCs. These results suggested great potential of efficient photodegradation of VOC mixture by rGO-TiO 2 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 7
·1-17
·
IF 2.9
Gao Wei,Li Yufeng,Zhao Jitao,Zhang Zhe,Tang Weiwei,Wang Jun,Wu Zhenyu
Methylene blue (MB), as a typical pollutant in industrial dyestuff wastewater, has caused serious water pollution. Therefore, reduced graphene oxide (rGO)/TiO 2 nanocomposites were synthetized by a simple hydrothermal technique and used as photocatalyst to degrade MB. It was illustrated when TiO 2 nanoparticles were loaded 5wt.% rGO framework, nanocomposite had a huge specific surface area of 176.45 m 2 g −1 and the average pore size of 4.25 nm. Effects of the rGO fraction in rGO/TiO 2 photocatalyst, the rGO/TiO 2 photocatalyst content, the initial pH, and the initial MB concentration on MB degradation efficiency were studied. The degradation efficiency about 98.18% was acquired at 5rGO/TiO 2 content of 0.4 g L −1 , pH = 6, MB concentration of 60 mg L −1 . The degradation efficiency of 5rGO/TiO 2 for MB was still as high as 86.24% after the tenth cycles, demonstrating rGO/TiO 2 nanocomposites were useful for the practical application. The potential photocatalytic mechanism of rGO/TiO 2 for MB degradation was immediate oxidative degradation procedure, and the combined action of \({O}_{2}^{\bullet -}\) , \({OH}^{\bullet }\) and h + can contribute to the photocatalytic degradation of MB. Furthermore, the photocatalytic degradation kinetic of rGO/TiO 2 for MB under UV irradiation was first-order model.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rongjie Zhe,Haoyun Dou,Xuanpan Xu,Ziwei Zhao,Long Chen,Qingye Zhao,Xinjun Bao,Guozhong Cao,Hong-En Wang
The shuttling and sluggish conversion kinetics of lithium polysulfides (LiPSs) lead to poor cycling performance and low energy efficiency in lithium-sulfur batteries (LSBs). In this work, a hierarchically structured nanocomposite, synthesized through a surfactant-directed hydrothermal growth following dopamine-protected pyrolysis, serves as a bidirectional catalyst for LSBs. This nanocomposite comprises N -doped reduced graphene oxide (rGO) nanosheets anchored with uniformly distributed TiO 2- x nanoparticles via interfacial N -Ti and C-Ti bonding, resulting in the formation of abundant 2D/0D Schottky heterojunctions (rGO/TiO 2- x ). Density functional theory (DFT) calculations and in situ Raman characterizations demonstrate that rGO/TiO 2- x effectively inhibits the shuttling of LiPSs with enhanced redox kinetics, achieving high utilization of the sulfur cathode and improving the overall reversibility. A high areal capacity is attained at a high sulfur loading and a low electrolyte/sulfur ratio. The initial specific capacity reaches 1010 mA h g −1 at a current density of 0.2C (1C = 1675 mA g −1 ), and a retention of 86.4 % is attained over 100 cycles. A light-emitting diode (LED) screen using two LSBs with rGO/TiO 2- x demonstrates their high potential for practical applications.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 15
·e55221
·
IF 2.7
You Zhang,Wenzhong Ma,Jing Zhong,Ruiqiao Jiang,Zhou Zhou,Sirui Lu,Shuo Wang
As an efficient method to realize photoinduced shape memory, photothermal filler has the characteristics of economy and convenience. However, the aggregation of the photothermal filler in the matrix material will reduce the material's shape memory and mechanical properties. In this work, the photothermal filler of reduced graphene oxide (rGO)-titanium dioxide (TiO 2 ) was prepared by the solvothermal method and then introduced into the polycaprolactone (PCL) matrices to construct a photoresponsive actuator. Because of TiO 2 is uniformly loaded on the rGO surface, rGO-TiO 2 disperses well in the composites. When the GO:TiO 2 ratio of photothermal filler is 1:1, the mechanical properties of PCL-GT-3 are the best, and the tensile strength and elongation at break are 31.8 MPa and 239.5%, respectively, and the crosslinking material under near-infrared light has a good photothermal effect. Due to the induced difference between the in-plane stress of the surface and the volume layer, the shape transformation can be controlled by very low energy (808 nm, 700 mW near-infrared laser). The scheme of controlling the properties of the photoinduced shape memory material by changing only the filler type is conducive to commercial application.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Alif Daffa Setyoputra,Heydar Ruffa,Heri Sutanto,Agus Subagio
Increasing energy demands are triggering the development of high performance, low-cost supercapacitor electrode material, particularly in countries that are shifting to renewable energy as their current energy supply cannot meet their significant energy demands. These countries require high-voltage, safe and long-lasting electrical energy storage devices. Multi-walled carbon nanotubes (MWCNTs), reduced graphene oxide (rGO) and Titanium Dioxide (TiO 2 ) were tested during an in-situ hydrothermal process. The structure test of X-ray diffraction (XRD) and scanning electron microscope (SEM) characterisation was used to determine the relation between the morphology of the electrode and its electrochemical value. The morphology of the composite electrode indicated that the nanocomposite electrode had better values than the single material electrode. Additionally, cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS) tested in a two-electrode system indicated that the specific capacitance of MWCNT-rGO-TiO 2 30% was 168 F g −1 and showed the energy and power density to be 15 Wh kg −1 and 337.5 W kg −1 , respectively. This result was higher with the other electrode due to the faradaic and non-faradaic processes in the electrode.
研究领域:
材料科学
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能源技术
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电化学
✓ 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）