POLYMERS & POLYMER COMPOSITES
·
2021
·
IF 2
Hailiang Hu,Minmin Chen,Mengye Cao
The eco-friendly functionalized TiO2/polymer antifouling (AF) coating was successfully synthesized by dispersing TiO2 nanoparticles in waterborne epoxy-modified tung oil resin. The AF effectiveness of coating was evaluated toward Staphylococcus aureus (S. aureus, ATCC6538), Escherichia coli (E. coli, ATCC8739) and diatom (Cyclotella sp., FACHB-1635). The nanoTiO2/polymer AF coating showed good antimicrobial activity both under the light and dark conditions by comparison with the pristine TiO2 nanoparticles and bulk polymer. Under light irradiation for 50 min, the AF coating showed only 8.4% and 8% survival rate for S. aureus and E. coli. In addition, The AF coatings exhibited favorable inhibition efficacy toward the growth and adhesion of Cyclotella sp., and the efficacy was enhanced with the increase of TiO2 content. It can be concluded that TiO2 nanoparticles endow the AF coatings with promoted fouling resistance properties.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Zifan Li,Zhibin Zhang,Zhimin Dong,Yongchuan Wu,Xiang Zhu,Zhongping Cheng,Yuhui Liu,Yingcai Wang,Zhijian Zheng,Xiaohong Cao,Youqun Wang,Yunhai Liu
The separation of uranium U(VI) through photoreduction approach has attracted substantial attention. Sulfide-based materials have revealed excellent performance for reducing U(VI) and there is no record of CuS based materials. Herein, we synthesized CuS/TNTAs heterostructured nanocomposites (CUTN) with varied CuS contents via successive ionic layer adsorption and reaction (SILAR) method. After SILAR deposition for 10 times, CUTN-10 showed the best photocatalytic performance, and 92.6 % of U(VI) can be removed within 180 min. The CuS could provide sufficient photoelectrons and TNTAs can transport these photoelectrons to the adsorbed U(VI) on its surface, the reduced uranium sediment was proved to be (UO 2 ) O 2 ·2H 2 O. More important, the combination of TNTAs could effective inhibit photocorrosion of CuS and the leaching of Cu 2+ was relatively low. We also unconsciously found that CUTN-10 can photoreduce U(VI) without any sacrificial agent which caused by the oxidation of S 2− . This work expands the application of sulfide-based materials and provides basic data for bracing the expansion of sulfide-based materials in the field of U(VI) photoreduction.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Ming Li,Jianhao Qiu,Lvye Yang,Yi Feng,Jianfeng Yao
Various TiO 2 /ZnIn 2 S 4 composites with an embedded structure have been developed by a facile one-pot synthesis. The activities of all samples were estimated by photocatalytic reduction of Cr(VI) under visible light (λ>420 nm). Results showed that the electrostatic interaction and self-assembly effect make TiO 2 nanoparticles inserting into ZnIn 2 S 4 nanosheets. The resulting TiO 2 /ZnIn 2 S 4 composites show much better photocatalytic performance for Cr(VI) reduction than that of pristine TiO 2 and ZnIn 2 S 4 . Especially, the photocatalytic efficiency of T/ZIS-0.3 (TiO 2 loading of 30 wt%) is approximate 3 times as high as that of pristine ZnIn 2 S 4 (TiO 2 exhibited almost no activity). The embedded structure of TiO 2 /ZnIn 2 S 4 offers apparent increase of specific surface area, visible-light absorption and electrons transfer efficiency, which are responsible for the boosted photocatalytic activity. This work would inspire researchers to construct high-efficiency semiconductor composites for photocatalytic environmental governance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2018
·
IF 4.9
Lin Li,Rong Chen,Xun Zhu,Qiang Liao,Dingding Ye,Biao Zhang,Xuefeng He,Long Jiao,Hao Feng,Wei Zhang
In this study, a novel ternary hybrid CdS/SiO 2 /TiO 2 film was proposed as the phonoanode for the photocatalytic fuel cell. The samples were characterized by X-ray diffraction, scanning electron microscopy and UV–vis absorption. The photoelectrochemical activity of the ternary hybrid electrode was characterized by the photocurrent-time transient response, linear sweep voltammetry and electrochemical impedance spectroscopy. It was shown that CdS/SiO 2 /TiO 2 yielded much higher photoelectrochemical activity than CdS/TiO 2 and bare TiO 2 did. The photoanode with CdS/SiO 2 /TiO 2 showed the highest photocurrent density of 4.6 mA cm −2 , exhibiting a 40% improvement over the conventional CdS/TiO 2 photoanode. The roles of SiO 2 and CdS in such a ternary configuration were elaborated. It was demonstrated that CdS could act as an excellent visible light captaturer to generate photo-induced charge carriers, and SiO 2 as a passivation layer to suppress the interfacial recombination of electrons and holes. Moreover, SiO 2 could allow for more CdS to be deposited at the photoanode owing to its high adsorption capacity . In addition, the effects of the SiO 2 content and the SILAR cycle time on the performance of the CdS/SiO 2 /TiO 2 photoanode were investigated. An optimal SiO 2 content of 10% could yield the best performance. Increasing the SILAR cycle time could improve the photoelectrochemical activity.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2018
·
IF 2.207
Hui Liu,Zhi-Guang Zhang,Xiao-Xiong Wang,Guang-Di Nie,Jun Zhang,Shan-Xiang Zhang,Ning Cao,Shi-Ying Yan,Yun-Ze Long
Highly flexible Fe 2 O 3 /TiO 2 composite nanofibers were successfully synthesized via electrospinning followed by high-temperature calcination . The morphologies and structures of Fe 2 O 3 /TiO 2 nanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and ultraviolet-visible (UV-Vis) spectroscopy, and their optical properties , photocatalysis and photodetection properties were also measured. The flexible nanofibers possess large specific surface area, and can be recycled by a magnet. Moreover, the absorption region has been extended from the UV region to the visible region, improving the performance of photocatalyst under visible light radiation . In addition, the formation of Fe 2 O 3 /TiO 2 heterostructures suppresses the recombination of photogenerated electron-hole pairs, which also improves the photocatalyst behavior. Particularly, these nanofibers can also work as a sensitive UV detector, which offers in situ monitor method of such photocatalysis materials.
研究领域:
材料科学
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环境科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 13
·9176-9185
·
IF 4.449
Xin Li,Huiming Lin,Xiang Chen,Hao Niu,Jiuyu Liu,Ting Zhang,Fengyu Qu
The design and synthesis of unique novel heterostructures for high-performance photocatalytic activity has exerted a tremendous fascination and has recently attracted intensive attention. In this work, a branch-like α-Fe2O3/TiO2 heterostructure has been synthesized controllably through an electrospinning method combined with a hydrothermal approach. The backbone of the heterostructure is composed of a 3D porous TiO2 nanofiber (∼70 nm in diameter) network with plenty of α-Fe2O3 nanorods (100–200 nm in length) deposited on them. The novel branch-like nanocomposites have an abundantly porous structure as well as large surface areas (up to 42.8 m2 g−1). In addition, their visible light photodegradation behaviour towards organic dyes, including Congo red (CR), methylene blue (MB), eosin red (ER) and methyl orange (MO), was investigated. Their excellent photocatalytic performances are attributed to their large surfaces, improved visible light absorption and high separation efficiency of the photogenerated electrons/holes. Furthermore, the degradation process was further studied by varying the amount of α-Fe2O3 deposited. The sample α-Fe2O3/TiO2-3 possessed the best performance to efficiently decolor CR solution even at a high concentration of 50 mg L−1 (160 min, 94 mg g−1), ascribed to the high adsorption capacity derived from the large surface, strong electrostatic interaction and structural match between α-Fe2O3/TiO2-3 and CR. These α-Fe2O3/TiO2 heterostructures exhibit great potential for decontamination of organic pollutants in waste water under visible light.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Case Studies in Construction Materials
·
2022
·
IF 4.934
Linsong Wu,Mengjun Mei,Zhen Li,Shuhua Liu,Xingzhi Wang
Photocatalytic pervious concrete pavement is a potential and sustainable new method for treating urban air and water pollution, and there is now an increasing amount of research on TiO 2 pervious concrete due to its excellent photocatalytic properties. In this study, pervious concrete with varying nano-TiO 2 contents (0 %, 1 %, 2 %, 5 %, 8 %) was prepared and evaluated for its performance in purifying methyl orange (MO). The results show that as the TiO 2 content increased from 0 % to 8 %, the photocatalytic degradation efficiency increased and then decreased, with the highest MO degradation rate of pervious concrete with 5 % TiO 2 content was 42.8 % at 120 min. However, as the TiO 2 content increases, the compressive strength and TiO 2 utilization rate of pervious concrete gradually decrease, and the 28-day compressive strength decreases from 26.0 MPa to 13.5 MPa. Therefore, 2 % TiO 2 content was determined to be optimal for pervious concrete.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 18
·7571-7582
·
IF 4.5
Yang Yang,Lu Jie,Ma Zhichun,Zhao Yi,Wang Shuang,Ge Kai,Yang Yongfang
Two dimensional (2D) CuTCPP/B–TiO 2 composites were successfully synthesized by addition of B–TiO 2 NPs into the system for preparation of 2D CuTCPP nanosheets under hydrothermal condition. 2D CuTCPP nanosheets with large specific surface area can not only act as supportor to decrease the aggregation of B–TiO 2 and improve the adsorption capacity of methylene blue (MB) but also provide more transfer pathway to effectively facilitate interfacial charge transfer and separation of photogenerated electrons and holes, thus leading to a superior efficiency for photodegradation of MB. The photocatalytic degradation rate constant of 2D CuTCPP/B–TiO 2 composites is 0.0486 min −1 , which is about 15.2, 5.92 and 4.23 times that of P25 (k = 0.0032 min −1 ), 2D CuTCPP nanosheets ((k = 0.0082 min −1 ) and B–TiO 2 NPs (k = 0.0115 min −1 ). This study demonstrates that the combination of B–TiO 2 NPs and 2D CuTCPP is a viable strategy to improve the photocatalytic efficiency for degradation of MB.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Zhu Wenjun,Zhang Bofeng,Kuang Jiaming,Zhang He,Cui Yang,Liu Pinle,Xie Mengzhen,Xiao Yuchen
Herein, TiO 2 -coated carbon cloth (CC) substrates were successfully synthesized. The relationship between heat treatment temperature and the structure and electrochemical performance of the CC/TiO 2 composites was examined, and a feasible model was proposed based on the structural evolution process under different heat treatment temperatures. As the temperature was increased from 450°C to 900°C, the morphology of the TiO 2 coating was transformed from nanocube particles to nanorods, and a mixed structure of particles and nanorods was obtained for CC/TiO 2 -800°C. As the anode electrode for lithium-ion batteries (LIBs), the CC/TiO 2 -800°C composite material presents superior structural stability and electrochemical performance; the initial discharge/charge specific capacities are 2372 and 1989 mAh/g (coulombic efficiency of 83.9%), and a satisfactory specific capacity of 994 mAh/g can be achieved under the condition of 0.5 A/g and 130 cycles. The excellent electrochemical properties can be explained by the unique structure. The CC substrate has high electrical conductivity, significantly enhancing the electron transfer performance of the composite materials. In addition, electron transport in three dimensions can be realized as a result of the synergistic effect of the CC substrate and TiO 2 coating composed of nanoparticles and nanorods. Moreover, the mixed structure of the TiO 2 coating reduces the diffusion distance of Li + ions and suppresses the volume variation during the electrochemical reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xiao-lei Wang,Wei Qin,Li-xin Wang,Kong-yin Zhao,Hui-cai Wang,Hong-yu Liu,Jun-fu Wei
In order to recover dyes from textile wastewater, a self-supported carboxylated titanium dioxide/calcium alginate (TiO 2 -COOH/CaAlg) hydrogel nanofiltration membrane was prepared using TiO 2 -COOH as the reinforcing agent. The Scanning electron microscopy (SEM) and Energy dispersive X-ray (EDX) mapping scanning spectra were employed to characterize the distribution of TiO 2 -COOH nanoparticles on the membrane surface. The pore size distribution, zeta potential and mechanical performance of the membrane were evaluated. The rejections for single dye solutions, salt solutions and dye/salt mixture solutions were also examined. The results indicate that the TiO 2 -COOH nanoparticles are dispersed uniformly on the membrane surface. Compared to CaAlg membrane, the tensile strength of 20 wt% TiO 2 -COOH/CaAlg membrane is enhanced by 328%. At the operating pressure of 0.1 MPa, the rejection ratios of 20 wt% TiO 2 -COOH/CaAlg membrane for 100 mg/L Brilliant blue G250, Direct black 38 and Congo red are 98.4%, 96.8% and 95.9% respectively, and the permeate flux is about 14.1 L·m −2 ·h −1 . Meanwhile, this membrane possesses the low rejection ratios for inorganic salts (16.1%, 15.6%, 12.3% and 9.0% for MgSO 4 , Na 2 SO 4 , MgCl 2 and NaCl, respectively), excellent dye anti-fouling property and good stability in the long-term filtration for dye/salt mixture solution.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Xingxu Gao,Lei Sheng,Menglin Li,Xin Xie,Ling Yang,Yun Gong,Min Cao,Yaozong Bai,Haoyu Dong,Gaojun Liu,Tao Wang,Xianli Huang,Jianping He
Commercial polyolefin separators often cause explosions and thermal runaways in lithium-ion batteries due to their poor thermal stability. Therefore, various polymer separators with high thermal stability have attracted the attention of researchers. In this paper, a kind of special nano-TiO2/Polyimide (TiO2@PI) composite separator was prepared by adding nano-TiO2 particles with certain content to the PAA solution before electrospinning. It is found that the added TiO2 ceramic particles greatly improve the flame retardant performance of the separator, and at the same time, they inhibit lithium dendrites and prevent the internal short circuit of the battery. As a result, the TiO2@PI nanofiber separator (5.0-TiO2@PI) prepared by a spinning solution with a TiO2 concentration of 5.0 wt % is formed by connecting spherical beads with a diameter of about 500 nm, which greatly inhibits lithium dendrites. It has better properties, such as electrolyte uptake (721%) and ionic conductivity (2.52 mS cm–1). The LiCoO2/Li battery based on 5.0-TiO2@PI nanofiber separator has a higher discharge capacity even at a current density of 4 C, which is better than that of PE separator. The use of this 5.0-TiO2@PI nanofiber separator has enlightening significance for the safety of high energy density batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 12
·1-12
·
IF 2.253
Pan Meng,Teng Xuegang,Li Mengxia,Pan Xianfeng,Liao Qiyong,Cheng Wenxiang,Yang Renchun
TiO 2 nanosheets have a great potential in photocatalytic H 2 evolution, but they suffer from low catalytic activity at present. Although the surface modification has been extensively used to improve the catalytic performance, regulating the surface functional groups of TiO 2 nanosheets to enhance the photocatalytic activity has been largely overlooked. In this study, we attempt to tailor the surface properties of TiO 2 nanosheets by adjusting the surface functional groups so as to improve their photocatalytic H 2 production activity. With adding a small amount of alcohols in the synthesis system, the surface hydroxyl groups of TiO 2 nanosheets were regulated successfully. Interestingly, the TiO 2 nanosheets prepared with adding ethylene glycol possess the significantly more surface hydroxyl groups and exhibit a narrower bandgap, a higher hydrophilicity, and a slower recombination rate of photo-induced carriers than the conventional nanosheets. Benefit from these special properties, the ability of the hydroxyl-rich TiO 2 nanosheets to photocatalyze H 2 evolution is obviously improved.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）