INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2012
·
IF 2.237
Weishuang Ni,Songping Wu,Qun Ren
Surface modification of TiO2 nanoparticles with 3-methacrylic acyloxy propyl trimethoxysilane (KH570) was carried out in the liquid phase. The modified TiO2 nanoparticles, as charge control agents (CCAs), were added to toner. Infrared and X-ray photoelectron spectroscopies provided strong indications of the formation of organic links between the TiO2 and the KH570. The thick coating layer of KH570 deposited on the surface of TiO2 nanoparticles was determined to be about 2–5 nm by transmission electron microscopy. The hydrophobicity of the modified toner decreased when the amount of coated KH570 reached 5.28 wt % and then increased with further increasing amount of coated KH570. The charge-to-mass ratio (Q/M) of the modified toner shifted in the negative direction with increasing amount of coated KH570; however, with increasing amount of modified TiO2, the value of Q/M shifted in the positive direction. The reason for this difference is that the OH groups existing on the surface of TiO2 transferred from the toner to the carrier after friction.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF PHOTOENERGY
·
2023
·Vol. 2023
·期 1
·8676430
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IF 3.2
Longli Lin,Lihua Shi,Simei Liu,Jieyi He
TiO 2 has potential application prospects in the fields of environmental pollution control and energy conversion, while its characteristics including proneness to agglomeration and low activity affect practical applications. In view of this, P25 TiO 2 and graphene were taken as raw materials to prepare the modified TiO 2 catalyst. The modification mechanism of TiO 2 was explained by characterizing the phase composition, microscopic morphology, and functional groups and analyzing the specific surface area and particle size. Then, the photocatalytic performance of the material was explored by taking methyl orange as the target to be degraded. Results show that TiO 2 is well grafted to the laminated structure of graphene using physicochemical interactions among the introduced functional groups after modifying P25 TiO 2 and graphene. This way, the 10.00 mg·L -1 methyl orange solution is almost completely degraded within 12 min at a reaction rate that is 1.81 times higher than that of P25 TiO 2 . Even after being used for 10 times, the performance still remains stable. The modification process is simple, and the method is reliable. Results can promote the practical application of TiO 2 photocatalytic technology.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 4
·2733-2742
·
IF 2.019
Hou Huilin,Wang Lin,Yang Weiyou,Gao Fengmei
Fe-doped TiO 2 nanofibers with a thoroughly mesoporous structure were prepared via a facile foaming-assisted electrospinning method. The foaming agents and FeAcAc were introduced in the raw materials to create the mesopores and incorporate the Fe dopants into the conventional solid TiO 2 nanofibers, respectively, which could be accomplished simultaneously over a one-step calcination process. The photocatalytic experimental results demonstrate that the mesoporous Fe-doped TiO 2 nanofibers exhibit significantly enhanced activity toward the RhB degradation and splitting water for hydrogen generation under visible-light illumination, as compared to those of Fe-doped solid and intrinsic thoroughly mesoporous counterparts. The photocatalytic mechanism is proposed that the one-dimensional mesoporous nanostructure can enhance the transportation of the reactant and products, and the Fe-doping induces the shift of the absorption edge into the visible-light range and restrains the recombination of photo-generated electrons and holes, which can synergistically improve their activity.
研究领域:
材料科学
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纳米科技
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光催化
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环境功能材料
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能源材料
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Xinlu Li,Xinlin Zhang,Ronghua Wang,Zelong Su,Junwei Sha,Pengfu Liu
A three-dimensional (3D) interconnected graphene nanoribbons (GNRs) framework wrapping double nanoshells of SnO 2 @TiO 2 was synthesized by a simple but effective method. The nanoshell of TiO 2 anchored on the surface of SnO 2 nanoshell with hollow core to restrict large volume expansion, then GNRs wrapped and interlaced double nanoshells of SnO 2 @TiO 2 to construct a continuous 3D conducting network. The double protection strategy of active electrode materials can make full use of the function of the three components. The enhanced electrochemical performance can be attributed to the structural stability, excellent electronic conductivity and high electrochemical reaction activity.
研究领域:
材料科学
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纳米技术
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电化学
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能源存储
·
功能材料
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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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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 13
·9505-9513
·
IF 2.019
Zhang Weiguo,Liu Jing,Guo Zhenyu,Yao Suwei,Wang Hongzhi
CdTe nanoparticle-sensitized TiO 2 nanotube arrays (CdTe/TiO 2 NTAs) were prepared by combining the sol–gel method with the electrodeposition method by the aid of anodic aluminum oxide template. The morphology, structure and composition of the materials were characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction (XRD). The photo response and photocatalytic activity of the materials were investigated by UV–Vis absorption spectroscopy. The results show that the pore diameter of the TiO 2 nanotubes is about 120 nm and the wall thickness is approximately 30 nm. CdTe nanoparticles are deposited both inside and in the tube-to-tube voids of the TiO 2 nanotubes. XRD analyses identify the anatase structure of TiO 2 nanotubes and cubic sphalerite structure of CdTe. Compared with pure TiO 2 nanotube film, the CdTe/TiO 2 NTAs display a significant increase in absorption coefficient in the visible light and a higher activity for photodegrading Rhodamine B under Xe lamp irradiation with an increase from 34 to 88%. The results also show that CdTe/TiO 2 NTAs exhibit better photoelectrochemical performance than TiO 2 NTAs.
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DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2018
·Vol. 13
·期 1
·59-69
·
IF 2.643
Yang Dongjie,Wang Shengyu,Zhong Ruisheng,Liu Weifeng,Qiu Xueqing
A simple method using a water soluble lignin quaternary ammonium salt (LQAS) and TiO 2 has been developed for the preparation of lignin/TiO 2 nanocomposites in an aqueous medium under mild conditions. The LQAS/TiO 2 nanocomposites contain well-dispersed small particles with excellent ultraviolet (UV) shielding abilities and good compatibilities with waterborne polyurethane (WPU). When the LQAS/TiO 2 nanocomposites were blended with WPU, the UV absorbance and the tensile ductility of the WPU increased significantly. The composite WPU hybrid film containing 6 wt-% LQAS/TiO 2 nanocomposite had the highest visible light transmittance and had excellent ultraviolet aging properties. After 192 h of UV light irradiation, the tensile strength of the composite film was above 8 MPa and the elongation at break was 800%. This work highlights new possibilities for the utilization of alkali lignin.
研究领域:
高分子材料
·
纳米复合材料
·
表面涂层技术
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紫外线防护
·
绿色化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Shuqing Ren,Yuehua Wen,Huiling Chen,Pan He,Chunze Ma,Chenyang Zhang,Meng Li,Dongmei Han
Improving the cycling performance without sacrificing its capacity is challenging for high-voltage LiNi 0.5 Mn 1.5 O 4 cathode due to the trade-off nature among the key properties. A self-polymerization process of dopamine was utilized to grow polydopamine (PDA)-nano titanium dioxide assembly. PDA@TiO 2 composite was demonstrated to be integrated with the particles of high-voltage spinel LiNi 0.5 Mn 1.5 O 4 cathodes via wet chemical method . PDA@TiO 2 decorated LNMO improved the long-term cycling performance and rate capability by suppressing detrimental side reactions in balancing the interfacial stability and Li + diffusion kinetics of LNMO and consequently providing efficient conductive pathways. As a result, 2% PDA@TiO 2 modified LNMO cathode exhibited the high reversible capacity of 117 mAh g −1 after 1000 cycles with good capacity retention of 90.7% at 1 C, and superior rate capability (78.5 mAh g −1 at 5 C) at room temperature. Remarkably, a significant improvement in cycling stability at an elevated temperature (50 °C) was obtained for the PDA@TiO 2 -LNMO composite, giving a capacity retention of 93% after 100 cycles at 1 C. The mechanism of performance improvement could be attributed to the maintenance of the structural stability of LNMO cathode materials and the enhanced kinetics of the remarkable lithium-ion diffusion through the protective effect of PDA@TiO 2 decorating.
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DOI
高影响因子
TALANTA
·
2016
·
IF 4.035
Na Bin,Weili Li,Xuehua Yin,Xiaohua Huang,Qingyun Cai
A novel electrochemiluminescence (ECL) aptasensor was proposed for ultrasensitive detection of cytochrome c (cyt c) using CdS:Mn quantum dot-modified TiO 2 nanowires (NWs) as electrode. The Mn-doped CdS was deposited on the TiO 2 NWs by successive ion layer adsorption and reaction (SILAR) as ECL emitter, on which thiol-modified aptamer of cyt c was attached via Cd–S bond. Due to the high photo-electrical transfer efficiency, the as-prepared aptasensor shows high selectivity and sensitivity towards cyt c with a detection limit of 9.5 fM and a linear range from 50 fM to 125 pM.
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Huiming Zeng,Liang Lv,Rui Fan,Yulin Wang,Xiaoli Shen,Jianjun Chen,Jianguang Li
Photocatalytic degradation by ultraviolet (UV)/TiO 2 combined with Fenton reagent was employed in treating high concentration n-propanol solution. The influence of the TiO 2 dosage, the concentration of ferrous ion, the integral H 2 O 2 dosage and the optimizing H 2 O 2 adding program were investigated by a series of batch experiments. The increasing injection of the hydrogen peroxide during the reaction will make the reaction rate constant (k 1 ) 6.9% higher than the average injection when the integral H 2 O 2 dosage is fixed. The optimized parameters of the combined process can be listed as follow: [Fe 2+ ] was 0.30 g/L, [TiO 2 ] was 0.08 g/L, and average [H 2 O 2 ]b was 3.85 g/L (which was divided into six different parts, and the increasing gradient was 5%). After 6 h degradation under the ultraviolet (UV) photocatalytic irradiation, more than 88% removal of n-propanol was observed. When the wastewater is treated with the combined process, the degradation of n-propanol can be taken as the pseudo-first order reaction. Based on the experimental data, a semi-empirical model for estimating the reaction rate constant k 1 in cylindrical reactor was built, which will help to investigate the effect of system parameters and support further engineering design.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
M. Wang,X. Zhang,R. Rao,N.X. Qian,Y.Q. Ma
Intimately contacted TiO 2 (nanoflake)/graphene composites were synthesized and doped with sulfur (S) at varying S/Ti molar ratios ( R S/Ti ) via a vapor-thermal method. S-doping led to a change in TiO 2 morphology from nanoflakes to nanoparticles. The dopant S in TiO 2 exhibits the multiple valence states of S 2− (replacing O 2− ), namely S 0 , S 4+ , and S 6+ (replacing Ti 4+ ), and introduces electronic states above the valence band of TiO 2 , simultaneously distorting the crystal lattice of TiO 2 . S-doping increases the degradation rate to methylene blue pollutant from 7.7 × 10 −2 min −1 to 10.7 × 10 −2 min −1 due to the increase in OH/ O 2 − free radicals, which play an important role in methylene blue degradation.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 39
·期 28
·15387-15393
·
IF 2.93
Zhengmin Yu,Jianling Meng,Jingran Xiao,Yang Li,Yongdan Li
Cobalt sulfide quantum dots (CoSx QDs) modified TiO 2 nanoparticles are prepared with a precipitation-deposition method using TiO 2 , cobalt acetate and sodium sulfide as the precursors. CoSx QD acts as an effective cocatalyst , which accelerates the transfer of the photo-generated electrons and serves as the active site for the reaction between electrons and H 2 O, thus enhancing the separation of the e − /h + pairs and the photocatalytic H 2 production activity of TiO 2 . The amount of CoSx exhibits an optimum value at about 5% (mole ratio to TiO 2 ), at which the H 2 production rate achieves 838 μmol h −1 g −1 using ethanol as the sacrificial reagent. This exceeds that of the pure TiO 2 by more than 35 times.
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高影响因子
危险品化学品经营许可证（带存储）