Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Yin Jinpeng,Wang Guanqin,Kong Dongqing,Li Chuang,Zhang Qiang,Xie Dongbai,Yan Yangyang,Li Ning,Li Qiang
To enhance the volumetric energy density and initial coulombic efficiency (ICE) of titanium oxide (TiO 2 ) as anode electrode material for lithium-ion batteries (LIB), this study employed a surface-confined in-situ inter-growth mechanism to prepare a TiO 2 embedded carbon microsphere composite. The results revealed that the composite exhibited a highly integrated structure of TiO 2 with oxygen vacancies and carbon, along with an exceptionally small specific surface area of 11.52 m 2 /g. Due to its unique microstructure, the composite demonstrated remarkable lithium storage properties, including a high ICE of 75%, a notable capacity of 426.8 mAh/g after 200 cycles at 0.2 A/g, superior rate performance of 210.1 mAh/g at 5 A/g, and an outstanding cycle life, with a capacity decay rate of only 0.003% per cycle over 2000 cycles. Furthermore, electrochemical kinetic studies further validated the advantages of this microstructure.
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高影响因子
TEXTILE RESEARCH JOURNAL
·
2025
·
IF 1.9
Ruobing Yao,Yuting Xue,Cheng Zhang,Guangxian Zhang,Fang Xu,Yunxuan Weng
In order to protect the environment, it is very important to develop facile and repeatable methods to degrade organic pollutants in water. The reduced graphene oxide and (RGO) and titanium dioxide (TiO2)-functionalized polyethylene terephthalate (PET) fabrics (RGO-TiO2-PET) were facilely prepared using a one-step hydrothermal method. The RGO-TiO2-PET exhibited remarkable photodegradation efficiency and excellent recyclability. From the results, RGO enhanced the catalytic degradation of rhodamine B by RGO-TiO2-PET under visible light irradiation. The degradation of RhB catalyzed by TiO2-PET was 63.57% after 180 min of degradation under visible light irradiation, while it increased to 93.28% catalyzed by 5% RGO-TiO2-PET. Moreover, RGO-TiO2-functionalized PET fabric exhibited wonderful reusability, since its photocatalytic activity did not significantly decrease after five photocatalysis cycles. The significant enhancement of photocatalytic activity can be ascribed to the enhanced absorption of dyes and light, and charge transfer from the conduction band of TiO2 to the empty electronic states of RGO.
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CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Huapeng Li,Bin Sun,Tingting Gao,Huan Li,Yongqiang Ren,Guowei Zhou
ABSTRACT Photocatalytic degradation and hydrogen production using solar energy through semiconductor photocatalysts are deemed to be a powerful approach for solving environmental and energy crisis. However, the biggest challenge in photocatalysis is the efficient separation of photo-induced carriers. To this end, we report that the mesoporous TiO 2 nanoparticles are anchored on highly conductive Ti 3 C 2 MXene co-catalyst by electrostatic self-assembly strategy. The constructed mesoporous TiO 2 /Ti 3 C 2 composites display that the mesoporous TiO 2 nanoparticles are uniformly distributed on the surface of layer structured Ti 3 C 2 nanosheets . More importantly, the as-obtained mesoporous TiO 2 /Ti 3 C 2 composites reveal the significantly enhanced light absorption performance, photo-induced carriers separation and transfer ability, thus boosting the photocatalytic activity . The photocatalytic methyl orange degradation efficiency of mesoporous TiO 2 /Ti 3 C 2 composite with an optimized Ti 3 C 2 content (3 wt%) can reach 99.6% within 40 min. The capture experiments of active species confirm that the •O 2 − and •OH play major role in photocatalytic degradation process. Furthermore, the optimized mesoporous TiO 2 /Ti 3 C 2 composite also shows an excellent photocatalytic H 2 production rate of 218.85 μmol g –1 h –1 , resulting in a 5.6 times activity as compared with the pristine mesoporous TiO 2 nanoparticles . This study demonstrates that the MXene family materials can be applied as highly efficient noble-metal-free co-catalysts in the field of photocatalysis .
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22844-22855
·
IF 2.22
Zhou Xiaojun,Ni Jian,Guan Jiayi,Liu Yue,Yin Junyang,Wang Jinlin,Zhang Yaofang,Li Juan,Cai Hongkun,Zhang Jianjun
Mesoporous TiO 2 (m-TiO 2 ) layer has been widely used as a photoelectrode of solar cells. Compared with conventional planar TiO 2 layer, appropriate pore size dramatically improves infiltration of perovskite (PVK) into the mesoporous layer because of the larger voids formed within the TiO 2 mesoporous layer and further enhances the light absorption efficiency of PVK for the better light-scattering ability of 20 nm TiO 2 nanoparticles. In our study, 75–95 nm pore size of TiO 2 scaffold layer was successfully prepared by adding different contents of ethyl cellulose (EC) as a template and terpineol as a leveling agent into conventional TiO 2 paste composed of 20 nm-sized TiO 2 nanoparticles and then applied to PVK solar cells (PSCs).The novel mesoporous layer was conducive to increase light-harvesting capacity and photovoltaic performance of PSCs. The influence of different contents of EC was discussed systematically for TiO 2 scaffold layer, the charge carrier dynamic, and the hysteresis behavior for our devices. Finally, by optimizing the parameters of the electron transport layer, the power conversion efficiency of the champion device with a 16.5% mass fraction of EC reached as high as 18%.
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PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2016
·Vol. 92
·期 4
·515-522
·
IF 2.008
Yanmei Luo,Yiru Jia,Dexian Zhang,Xinjian Cheng
TiO 2 /PVA composite nanofiber mat was prepared via an electrospinning technology. SH-TiO 2 -SiO 2 hybrid particles and PVA solution were injected through a coaxial syringe, yielding a composite nanofiber mat. The as-prepared SH-TiO 2 -SiO 2 /PVA composite nanofiber mat was immersed in Cd 2+ cation solution and S 2− anion solution in turn. Thus, yellow TiO 2 @CdS/PVA composite nanofiber mats were prepared. By adjusting the number of times a mat was immersed in the Cd 2+ and S 2− solutions, different amounts of CdS particles attaching to the mats were obtained. Both SH-TiO 2 -SiO 2 /PVA and TiO 2 @CdS/PVA composite nanofiber mats were employed to catalyze the photodegradation of a model dye, methylene blue. The photodegradation performance could be greatly enhanced by the introduction of CdS particles anchoring onto TiO 2 particles. The photodegradation efficiency reached 99.2% within 180 min. Also, the nanofiber mat could be recycled and reused at least 10 times. The photodegradation efficiency of TiO 2 @CdS/PVA composite nanofiber mats remained 68.8% for 10 cycles.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yan Cao,Zipeng Xing,Zhenzi Li,Xiaoyan Wu,Mengqiao Hu,Xu Yan,Qi Zhu,Shilin Yang,Wei Zhou
3D mesoporous black TiO 2-x /Ag nanosphere coupled with 2D g-C 3 N 4 sheet ternary heterojunctions are successfully fabricated through a facile evaporation-induced self-assembly (EISA) process and photodeposition method, followed by a mild calcination (350 °C) under an argon atmosphere after an in situ solid-state chemical reduction strategy. The resultant mesoporous black TiO 2-x /Ag/g-C 3 N 4 ternary heterojunctions with narrow band gap of ∼ 2.27 eV possess a relative high specific surface area of ∼ 100 m 2 g −1 , main pore size of 6.2 nm and the highest visible-light-driven photocatalytic property for degradation of methyl orange (97%) and methylene blue (99%). The apparent reaction rate constants (k) of mesoporous black TiO 2-x /Ag/g-C 3 N 4 for methyl orange and methylene blue are ∼ 9 and 11 times higher than that of pristine TiO 2 . The possible mechanism is proposed, and the excellent photocatalytic property can be ascribed to the introduction of Ti 3+ self-doping and g-C 3 N 4 , which favor the visible light absorption and the separation of electron-hole pairs, the surface plasma resonance effect of Ag nanoparticle, and the mesoporous networks offer more surface active sites.
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高影响因子
Catalysis Science & Technology
·
2017
·Vol. 7
·期 23
·5687-5693
·
IF 5.773
Weijia Lv,Zhihang Liu,Jinjing Lan,Ziyu Liu,Wenxin Mi,Juying Lei,Lingzhi Wang,Yongdi Liu,Jinlong Zhang
Spurred by the threat of hexavalent chromium (Cr(VI)), the idea of reducing Cr(VI) into less toxic Cr(III) has been commonly studied. Here, we used a facile photodeposition method to modify inverse opal TiO2 (i.o.TiO2) with cobalt phosphate (Co-Pi), and the resulting composite was applied for photocatalytic reduction of Cr(VI). This is the first time that an inverse opal structure as well as a Co-Pi catalyst is applied in the photocatalytic reduction of Cr(VI). In addition, the combination of i.o.TiO2 and Co-Pi achieves high visible-light-driven photocatalytic activity, which is better than that of the pure Co-Pi catalyst and unmodified i.o.TiO2. Experimental results demonstrated that the Co-Pi in the composite could absorb a large amount of visible light and then inject electrons into the conduction band of i.o.TiO2 which subsequently participate in the reduction reaction of Cr(VI). Moreover, the inverse opal structure of the catalyst possesses the advantages of having a large surface area and efficient light harvesting ability, leading to the better catalytic activity of Co-Pi/i.o.TiO2 than Co-Pi/bulk TiO2 and Co-Pi/P25. It's also proved that this Co-Pi/i.o.TiO2 photocatalyst can efficiently remove organic pollutants together with Cr(VI). This study provides new insights into the design and fabrication of efficient photocatalysts for the removal of environmental pollutants under visible light.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Haizhou Fan,Jingmao Zhao,Jingfan Zhang,Hongfei Li,Sheng Zhang,Jun Sun,Fei Xin,Fang Liu,Zuodong Qin,Wufei Tang
A multi-functional kaolinite-based compound (AST@Kaol) was prepared by successive loading of TiO 2 and SiO 2 to the surface of metakaolinite (Kaol), followed by reaction with γ-aminopropyl triethoxysilane (APTES). The hybrid was then introduced to epoxy resin (EP) to enhance flame retardancy, smoke suppression and anti-aging properties. The results demonstrated the presence of only 3 wt% AST@Kaol can increase the value of limit oxygen index (LOI) of EP composite to 27.3% from 25.3% of neat EP, as well as decrease the value of heat release rate , total smoke release and the smoke density by 36.9, 14.3 and 19.9%, respectively, compared to neat EP. Besides, the thermal stability and thermal oxidative resistance of EP composites was enhanced. The mechanism of fire retardancy, anti-ageing and mechanical of the EP composite containing AST@Kaol was also speculated.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Ziwei Kan,Ye Chen,Qianyun Zhang,Luyi Pan,Aiying Chen,Ding Wang,Yi Wang,Guangming Wan,Bin He
The catheters coating can be effective in reducing bloodstream infection and thrombosis, which are the major complications in blood contact catheters. However, the surface functional coating is difficult to be implemented due to the high surface stretching force from the minor-caliber. In this work, we propose a covalent bonding coating of polydopamine/titanium dioxide quantum dots (PDA/TiO 2 QDs) on polyurethane (PU) catheters, which can fulfill a dual-function of antibacterial and antithrombosis. The PDA/TiO 2 QDs layer was prepared by dip-coating, where the intermediate transition layer of PDA was reacted with the internal hydroxyls of PU surface by pre-oxidation and bonds with the external TiO 2 QDs coating. The surface microstructures are analyzed by SEM, TEM and XPS methods, and the antimicrobial and anticoagulant performances are investigated by bacterial plate count and platelet adhesion tests. The oxidizing and hydrophilic effect of the top layer of TiO 2 QDs were enhanced by the QD-sized particles. The antibacterial activities of the PDA/TiO 2 QDs coating on PU catheters against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), especially to S. aureus , are evidenced by bacterial plate count test, reaching good bactericidal rates of 49.9 % against E. coli and 83.7 % against S. aureus , respectively. Platelet adhesion test and whole blood dynamic circulation modeling demonstrate that the PDA/TiO 2 QDs coating effectively inhibits platelet adhesion due to an excellent hydrophilicity of TiO 2 QDs surface, and thereafter reduce thrombus formation.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 3
·715-724
·
IF 2.327
Zhang Kaiyue,Chen Si,Feng Yaqing,Shan Zhongqiang,Meng Shuxian
A novel polymer gel electrolyte was used to improve the performance and long-term stability in dye-sensitized solar cells (DSSCs). The polymer gel electrolyte (PGE) was prepared by mixing 5 wt% poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and 2 % TiO 2 nanoparticles. The conductivity of PGE with P25 reached 9.98 × 10 −3 S/cm, which increased by 34.9 % compared with 7.40 × 10 −3 S/cm of PGE without P25, and the diffusion coefficient was also increased by 19.0 %. Different photoelectrodes were obtained by using three kinds of surfactants (cetylamine, octadecylamine, and P123) as pore-forming materials, and their morphologies were contrasted through scanning electron microscopy (SEM). The results showed that gel electrolyte can increase the short-circuit current density ( J
sc ) from 11.01 to 12.99 mA/cm 2 in DSSCs. Moreover, unlike the liquid electrolyte, the gel electrolyte is more conducive to the TiO 2 photoelectrodes with larger pores. In conclusion, the efficiency of DSSC with gel electrolyte and P123 as pore-forming material was 6.73 %, which was 12 % higher than the liquid electrolyte in the same test condition. In addition, the sealed gel electrolyte DSSCs showed better stability than did liquid electrolyte DSSCs during nearly 600 h.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Guangyang Wang,Shaobai Sang,Qinghu Wang,Yawei Li,Heng Wang,Tianbin Zhu
MgCr 2 O 4 is a potential infrared radiation material for high-temperature furnaces energy-saving. However, poisonous Cr 6+ is easily formed in MgCr 2 O 4 -based materials during the preparation process, which is harmful to the environment. In this study, TiO 2 -doped MgCr 2 O 4 materials were prepared at 1600 ℃ by solid-phase sintering method. The effects of TiO 2 as a dopant on the infrared radiation properties of MgCr 2 O 4 and the leaching concentration of Cr 6+ were investigated, and the mechanism was discussed. Results show that the emissivity of MgCr 2 O 4 in both near-infrared and mid-infrared bands is enhanced with the increase of TiO 2 content, and the specimen MgCr 1.6 Ti 0.4 O 4.2 has the highest average emissivity in the 0.8–2.5 μm and 2.5–10.0 μm bands, which are 0.82 and 0.87, respectively. Moreover, the addition of TiO 2 significantly reduces the Cr 6+ content of MgCr 2 O 4 , with the Cr 6+ removal rate of MgCr 1.6 Ti 0.4 O 4.2 up to 84.2 %.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Guangyuan Xie,Lei Wang,Qiuyu Zhu,Liang Xu,Kaili Song,Zhicheng Yu
To improve inkjet printing performance, surface single encapsulation of nano-TiO2 particles has widely been reported. However, surface single encapsulation has a limited effect on improving the inkjet printing performance of nano-TiO2 particles. In this study, SiO2 nanoparticle-decorated TiO2 (SiO2/TiO2) nanocomposites modified with silane coupling agents were obtained by a two-step method to improve the inkjet printing performance. The effects of different Na2SiO3 concentrations on the morphology, particle size, and opacity performance of SiO2/TiO2 nanocomposites were studied. The results showed that when the molar ratio of Na2SiO3 to TiO2 was 0.06:1, SiO2/TiO2 nanocomposites showed the best dispersibility and the best opacity performance. Then, the effect of different silane coupling agents on the properties of curing films was investigated. The results showed that the properties (opacity performance, tensile properties, thermal stability, and color fastness) of the KH570-SiO2/TiO2 nanocomposite curing film were greatly improved. The characteristic peaks in the Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed that SiO2 nanoparticles were anchored at the nano-TiO2 particle surface via Si–O–Ti bonds, and silane coupling agents were successfully grafted onto the SiO2/TiO2 nanocomposite surface via Si–O–Si/Si–O–Ti bonds. In addition, it was verified that the double bonds of KH570-SiO2/TiO2 nanocomposites participated in the photopolymerization of oligomers/monomers by FTIR.
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高影响因子
危险品化学品经营许可证（带存储）