Surfaces and Interfaces
·
2024
·
IF 5.7
Xu Yuan,Wei Wang,Cuiting Du,Qianqian Kang,Zhipeng Mao,Shougang Chen
The present study reports on a composite coating exhibiting noise reduction and anti-corrosion properties. We successfully synthesized a Ti 3 C 2 T x @TiO 2 -PDA composite filler that involves growing porous TiO 2 onto lamellar MXene (Ti 3 C 2 T x) material and further coating both surfaces with a layer of polydopamine (PDA) material, providing the coating material with a micro-cavity structure to enhance its ability to dissipate acoustic energy and resist corrosion. And we incorporated it into the prepared disulfide bond-modified polyurethane coating matrix. Experimental tests and finite element analysis demonstrate that the coating can reduce environmental noise by approximately 33% while maintaining a maximum impedance modulus |Z| of 5.51 × 10 7 Ω·cm 2 after immersion in a 3.5 wt% NaCl solution for 25 days. The porous structure of the composite filler provides micro-cavities within the coating, while its lamellar structure acts as a physical barrier against corrosive media. Furthermore, introducing disulfide bonds enhances acoustic energy dissipation within the coating. Consequently, this coating exhibits exceptional corrosion resistance and noise reduction performance, presenting significant potential for applications in marine equipment's noise reduction and corrosion prevention.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Huihui Wang,Qian Zhao,Daiqiang Li,Zhilin Zhang,Yuan Liu,Xueli Guo,Xiaotong Li,Zhi Liu,Lian Wang,Jinzhu Ma,Hong He
Photothermal catalysis is extremely promising for the removal of various indoor pollutants owing to its photothermal synergistic effect, while the low light utilization efficiency and unclear catalytic synergistic mechanism hinder its practical applications. Here, nitrogen atoms are introduced, and Pt nanoparticles are loaded on TiO2 to construct Pt/N-TiO2-H2, which exhibits 3.5-fold higher toluene conversion rate than the pure TiO2. Compared to both photocatalytic and thermocatalytic processes, Pt/N-TiO2-H2 exhibited remarkable performance and stability in the photothermocatalytic oxidation of toluene, achieving 98.4% conversion and 98.3% CO2 yield under a light intensity of 260 mW cm–2. Furthermore, Pt/N-TiO2-H2 demonstrated potential practical applicability in the photothermocatalytic elimination of various indoor volatile organic compounds. The synergistic effect occurs as thermocatalysis accelerates the accumulation of carboxylate species and the degradation of aldehyde species, while photocatalysis promotes the generation of aldehyde species and the consumption of carboxylate species. This ultimately enhances the photothermocatalytic process. The photothermal synergistic effect involves the specific conversion of intermediates through the interplay of light and heat, providing novel insights for the design of photothermocatalytic materials and the understanding of photothermal mechanisms.
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PubMed
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ting Zhang,Weitao Wang,Meng He,Huan Wang,Zhen-Hong He,Yang Yang,Kuan Wang,Zhao-Tie Liu
Imines as valuable chemical intermediates can be synthesized by aerobic photocatalytic oxidation of amines, which is recognized as a promising and green route for imines synthesis. It is attractive to develop solvent-free photocatalytic oxidation of amines with high efficiency, especially with high activity and selectivity, but it is challenging. In the present work, flower-like BiOX/TiO 2 (X = Cl, Br, I) heterojunction was designed for solvent-free photocatalytic oxidation of benzylamine to N-benzylidenebenzylamine. Type II heterojunction of BiOCl/TiO 2 with 67.3 wt% of BiOCl achieved the high formation rate of 6316 µmol∙g −1 ∙h −1 and selectivity of 99 % on BiOCl/TiO 2 . To the best of our knowledge, the activity and selectivity are the highest for solvent-free photocatalytic system. The reason for the varied photocatalytic performances were investigated. The solvent-free photocatalytic mechanism was revealed and proposed. Moreover, the BiOCl/TiO 2 photocatalyst can be used for photocatalytic oxidation of varied benzylamines to imines.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Yalong Liu,Binjie Xin,Md All Amin Newton,Lifeng Li,Dan Huang
Oil pollution poses severe threats to both ecosystems and human health. This study utilized electrospinning and carbonization processes to fabricate a SiO2-TiO2-C nanofiber membrane (STCNFM) exhibiting photocatalytic self-cleaning properties designed explicitly for oil-water separation. These membranes possess nanoscale rough structures, endowing them with superoleophilicity (0°) and hydrophobicity (138°). Addressing the limitations associated with traditional ceramic membranes, particularly in terms of stability and reproducibility, cyclic experiments confirm the significant stability and reproducibility of this composite membrane, ensuring reliable long-term applications for continuous oil-water separation. Leveraging the synergistic effect of TiO2 and the carbon fiber substrate, STCNFMs-5 demonstrate exceptional separation performance and notable self-cleaning capabilities. Following a 2-h exposure to ultraviolet light, the membrane's flux is restored to its original level. STCNFMs offer a promising solution for efficiently separating oil-water mixtures and emulsions, holding potential importance in water treatment and resource recovery endeavors.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 16
·期 12
·3747-3752
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IF 2.131
Xu Chun-Xuan,Huang Ke-Jing,Chen Xue-Min,Xiong Xiao-Qin
A novel electrochemical platform based on nickel oxide (NiO) nanoparticles and TiO 2 –graphene (TiO 2 –Gr) was developed for the direct electrochemistry of glucose oxidase (GOD). The electrochemical behavior of the sensor was studied using cyclic voltammetry and chronoamperometry. The experimental results demonstrated that the nanocomposite well retained the activity of GOD and the modified electrode GOD/NiO/TiO 2 –Gr/GCE exhibited excellent electrocatalytic activity toward the redox of GOD as evidenced by the significant enhancement of redox peak currents in comparison with bare GCE. The biosensor responded linearly to glucose in the range of 1.0–12.0 mM, with a sensitivity of 4.129 μA mM −1 and a detection limit of 1.2 × 10 −6 M under optimized conditions. The response time of the biosensor was 3 s. In addition, the developed biosensor possessed good reproducibility and stability, and there was negligible interference from other electroactive components.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2012
·Vol. 127
·期 1
·733-739
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IF 1.289
Weidong Zhou,Tao Xu,Xiaowei Wang,Erjuan Zhi,Jun Liu,Wei Zhang,Junhui Ji
In this study, the nanocomposites of poly(butylene succinate) (PBS) and TiO 2 nanofibers were first synthesized via in situ polymerization. Molecular weight, morphology, and thermal properties of the nanocomposites were characterized. As the weight percentage of TiO 2 nanofibers increased from 0 to 2%, the molecular weight of PBS in the nanocomposites decreased gradually compared with that of pure PBS. In morphology, the nanocomposites were constituted by free PBS and PBS-grafted TiO 2 nanofibers (PBS- g -TiO 2 ), which were proved by the Fourier transform infrared, scanning electron microscopy (SEM), and transmission electron microscopy. In addition, the SEM demonstrated the strong interfacial interaction and homogeneous distribution between TiO 2 nanofibers and PBS matrix. The thermal properties determined by differential scanning calorimetry and thermogravimetric analysis included the increasing of cold crystallization temperatures, the melting temperatures, and the thermal stability. Besides, the crystallinity and the rate of crystallization of the nanocomposites were enhanced, which were also observed by the X-ray diffraction. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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Lubricants
·
2024
·Vol. 12
·期 8
·269
·
IF 3.1
Jiaqi Shao,Guoyan Yu,Yixing He,Jun Li,Mingxing Hou,Xianmin Wang,Ping Zhang,Xianzhang Wang
In the past decade, triboelectric nanogenerators (TENGs) have attracted significant attention across various fields due to their compact size, light weight, high output voltage, versatile shapes, and strong compatibility. However, substantial wear at solid–solid contact interfaces presents a major obstacle to the electrical output stability of TENGs. The objective of this study is to investigate the output performances of TENGs lubricated with TiO2-doped oleic acid. The results suggest that the triboelectrical performances of the polyimide (PI) film sliding against a steel ball under 0.1 wt% TiO2-doped oleic acid are significantly improved compared to those under dry conditions; the growth rates are 35.2%, 103.6, and 85.6%, respectively. Moreover, the coefficient of friction dropped from 0.31 to 0.066. The wear and performance enhancement mechanism are also analyzed. This study provides an effective approach to improve both the electrical performances and tribological behaviors.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Min Yuan,Ke Huang,Dongqing Dai,Hongfei Yin,Wei Zhao,Yixin Jiang,Yahui Feng
The integration of heterogeneous photocatalysts has emerged as a promising approach to boost the effectiveness of photocatalytic reactions for hydrogen evolution. In this study, we explore the synergistic effects of Ti 3+ -TiO 2 /P-doped g-C 3 N 4 heterojunctions on the enhancement of visible light-induced hydrogen generation efficiency. The photocatalytic hydrogen evolution performance of the as-prepared TPCN100 (280.38 μmol g −1 h −1 ) surpasses that of pristine P-doped g-C 3 N 4 (34.89 μmol g −1 h −1 ) and Ti 3+ -TiO 2 (39.71 μmol g −1 h −1 ) by factors of 8.0 and 7.1 respectively. Through a comprehensive investigation of the structural, electronic, and photocatalytic properties, the underlying mechanisms accountable for the observed enhancement in efficiency within the heterojunction system were elucidated. Based on the in-situ X-ray photoelectron spectrometer (XPS) examination, measurement of band edge, and electron paramagnetic resonance (EPR) analysis, the S-scheme photocatalytic mechanism was proposed. The integration of Ti 3+ -TiO 2 and P-doped g-C 3 N 4 offers new insights into the design of advanced photocatalytic materials for sustainable energy applications.
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RSC Advances
·
2012
·Vol. 2
·期 9
·3753-3758
·
IF 0
Jing Ma,Jia Chu,Liangsheng Qiang,Juanqin Xue
Bi-doped TiO2/SBA-15 (Bi–TiO2/SBA-15) was synthesized by a wet impregnation method. It was found that SBA-15 retained its ordered hexagonal mesostructure after incorporation of TiO2 and Bi. TiO2 nanoparticles and Bi species dispersed well and anchored both in the channel and the wall of SBA-15. The photocatalytic activity was evaluated on photodegradation of Rhodamine B (RhB) under visible light irradiation (λ ≥ 420 nm). Experimental results indicated that Bi–TiO2/SBA-15 exhibited higher photocatalytic activities than pure TiO2 and TiO2/SBA-15 owing to the synergetic effects of Bi species and TiO2. The degradation of RhB by these catalysts follows the pseudo-first-order kinetic model and Bi–TiO2/SBA-15 (2.0%) was found to be the best. The effect of Bi doping on the photocatalytic activity was investigated by the density functional theory (DFT) method. The calculated results indicated that Bi doping could improve the photocatalytic activity by extending the spectral response from UV to the visible region, making the Bi–TiO2/SBA-15 active under visible light irradiation.
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CATALYSIS COMMUNICATIONS
·
2011
·
IF 2.827
Jing Yang,Kunqi Wang,Liang Liang,Ligang Feng,Yuwei Zhang,Bo Sun,Wei Xing
A hybrid photoelectrochemical biofuel cell is composed of a TiO 2 film conductive glass electrode sensitized by a copper chlorophyll trisodium salt in combination with the platinized cathode and the electrolyte which contains redox mediator and enzyme as catalyst. The photovoltaic measurements indicate the optimal dye-adsorption time is 4 h and the incident photon-to-collected electron conversion efficiency is 16% at 400 nm. From the current–voltage curve the open-circuit voltage, short-circuit current density, maximum power density and overall energy conversion efficiency are 468 mV, 482 μA/cm 2 , 97 μW/cm 2 and 9.7%, respectively.
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ENERGY
·
2017
·
IF 4.52
Haoran Li,Yurong He,Ziyu Liu,Baocheng Jiang,Yimin Huang
Harvesting solar energy for steam generation has been widely applied in processes, such as sterilization, water purification , sea water desalination , and electricity generation . It has been found that a nanoparticle-modified membrane (NPM) can directly convert incoming solar energy into thermal energy in a short time period. In this work, broadband core–shell Ag@TiO 2 nanoparticles (NPs) having significant larger absorbance were synthesized. Flexible membranes using the deposition of the synthesized NPs were fabricated and floated on the surface of water to enhance the water evaporation. The effects of the density of deposited NPs and the solar irradiance on the evaporation performance were systematically investigated. Results showed that under 5 sun (1 sun = 1 kW/m 2 ) irradiation, the NPM obtained the highest evaporation capacity together with a considerable evaporation efficiency (52.7%) for NPs deposition of 1.0 g/m 2 . In addition, an evaporative efficiency of up to 68.6% was attained under the solar irradiance of 1 sun. On the other hand, most of the heat lost was transferred into the bulk water and gave rise to the enhancement of sensible heat energy, which can be further used in a volumetric absorption type solar collector.
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BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Hui-Fang Cui,Wen-Wen Wu,Meng-Meng Li,Xiaojie Song,Yuanxu Lv,Ting-Ting Zhang
A highly stable electrochemical acetylcholinesterase (AChE) biosensor for detection of organophosphorus pesticides (OPs) was developed simply by adsorption of AChE on chitosan (CS), TiO 2 sol-gel, and reduced graphene oxide (rGO) based multi-layered immobilization matrix (denoted as CS @ TiO 2 -CS/rGO). The biosensor fabrication conditions were optimized, and the fabrication process was probed and confirmed by scanning electron microscopy and electrochemical techniques . The matrix has a mesoporous nanostructure . Incorporation of CS and electrodeposition of a CS layer into/on the TiO 2 sol-gel makes the gel become mechanically strong. The catalytic activity of the AChE immobilized CS @ TiO 2 -CS/rGO/glassy carbon electrode to acetylthiocholine is significantly higher than those missing any one of the component in the matrix. The detection linear range of the biosensor to dichlorvos , a model OP compound, is from 0.036 μM (7.9 ppb) to 22.6 μM, with a limit of detection of 29 nM (6.4 ppb) and a total detection time of about 25 min. The biosensor is very reproducibly and stable both in detection and in storage, and can accurately detect the dichlorvos levels in cabbage juice samples, providing an efficient platform for immobilization of AChE, and a promisingly applicable OPs biosensor with high reliability, simplicity, and rapidness.
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