ACS Applied Nano Materials
·
2025
·
IF 5.5
Wenting Wang,Zile Wang,Zhaoshuang Li,Chaoqi Chen,Yuanfeng Wei,Xu Xu,He Liu,Chuntao Kuang,Guoen Yang,Xingong Li,Yan Qing,Yiqiang Wu
Oily wastewater discharge in daily life and industry poses a major threat to the environment and human health. Recently, superhydrophobic materials for the treatment of oily wastewater have attracted much attention. Herein, bioinspired from blueberry and mussel, a superhydrophobic coating (RA-S@TiO2 coating) based on sulfhydryl-modified rosin acid (RA-S) and titanium dioxide nanoparticles (TiO2) was successfully prepared. To increase the micro/nano roughened structure on the material surface, TiO2 nanoparticles with better self-cleaning properties were used as one of the coating components. The prepared RA-S@TiO2 coating exhibited excellent superhydrophobicity (water contact angle greater than 153°) and superoleophilicity. What is more, the separation efficiency and flux of the RA-S@TiO2 coating for various oil–water mixtures were greater than 95% and 6759 L·m–2·h–1, respectively. It was clearly found that the separation efficiency and flux remained above 95% and 6451 L·m–2·h–1 even after 10 separations. Moreover, the RA-S@TiO2 coating exhibited desirable durability and stability as well as emulsion separation performance after the treatments. Droplets on the RA-S@TiO2 coating demonstrated desirable anti-icing performance with freeze delays up to 1200 s at −18 °C. Furthermore, life cycle assessment revealed that the environmental impact of the RA-S@TiO2 coating was significantly lower than that of the other two commercially available superhydrophobic materials. In conclusion, due to the environmental advantages of the RA-S@TiO2 coating, it provided a sustainable solution for the preparation of a superhydrophobic material, which had a promising future in the fields of oil–water separation and anti-icing.
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BIOELECTROCHEMISTRY
·
2011
·
IF 3.52
Jun-Yong Sun,Ke-Jing Huang,Su-Fang Zhao,Yang Fan,Zhi-Wei Wu
TiO 2 -graphene nanocomposite was prepared by hydrolysis of titanium isopropoxide in colloidal suspension of graphene oxide and in situ hydrothermal treatment . The direct electrochemistry and electrocatalysis of hemoglobin in room temperature ionic liquid 1-Butyl-3-methylimidazolium hexafluorophosphate, chitosan and TiO 2 -graphene nanocomposite modified glassy carbon electrode were investigated. The biosensor was examined by using UV-vis spectroscopy, scanning electron microscopy and electrochemical methods. The results indicated that hemoglobin remained its bioactivity on the modified electrode , showing a couple of well-defined and quasi-reversible redox peaks, corresponding to hemoglobin Fe III /Fe II couple. The kinetic parameters for the electrode reaction , such as the formal potential ( E o' ), the electron transfer rate constant ( k s ), the apparent coverage ( Γ ), and Michaelis–Menten constant ( K m ) were evaluated. The biosensor showed good electrochemical responses to the reduction of H 2 O 2 in the ranges of 1–1170 μM. The detection limit was 0.3 μM (S/N = 3). The properties of this composite film, together with the bioelectrochemical catalytic activity , could make them useful in the development of bioelectronic devices, and investigation of electrochemistry of other heme proteins at functional interface.
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PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Penghai Li,Fengzhou Li,Kun Wang
The brain serves as the central hub for both our physiological and psychological activities, and current research on the human brain mostly relies on electroencephalography (EEG) method. Hence, we have developed a flexible nanozymes/iridium-titanium dioxide (SAN/Ir-TiO
2
) dry electrode for collecting EEG signals. Due to the hygroscopic nature of SAN nanozymes, they facilitate the maintenance of skin moisture balance. Additionally, the combination of iridium nanoparticles with a titanium dioxide nanotube array enables rapid electron transfer, resulting in an average impedance of 14.2 kΩ in the no-hair region and 19.9 kΩ in the hair region for the electrode. Moreover, in experiments involving blinking, clenching teeth, and alpha wave blocking, signal collection correlation between SAN (single atom nanozymes)/Ir-TiO
2
and traditional Ag/AgCl electrodes is 97.1% to 99.5%, and the signal collection correlation between electrodes from the market and traditional Ag/AgCl electrodes is 95.5% to 99.2%. In Steady-State Visual Evoked Potential (SSVEP) experiments with a 9-channel cap, stimulation frequencies ranging from 7.5Hz to 14Hz were recorded and subjected to frequency domain analysis. Within the range of 7.5Hz to 14Hz, the signal-to-noise ratio ranged from 7.5 to 14.1db, surpassing the performance in other regions. In an 8-command SSVEP classification experiment, the train accuracy and online accuracy were as high as 92.8% and 92.8% respectively, demonstrating the feasibility of using SAN/Ir-TiO
2
dry electrodes for Brain-Computer Interface (BCI) technology.
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RSC Advances
·
2015
·Vol. 5
·期 80
·64976-64982
·
IF 3.84
Shuaishuai Ma,Jinjuan Xue,Yuming Zhou,Zewu Zhang,Zhilan Cai,Daibao Zhu,Shuang Liang
A facile hard template approach has been developed to prepare mpg-C3N4/TiO2 composites using SiO2 nanoparticles as a hard template and cyanamide as a precursor. The samples have been well characterized using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). The results demonstrate that TiO2 nanoparticles sized 5–10 nm were distributed on the surface of mpg-C3N4 to form the mpg-C3N4/TiO2 heterojunction photocatalyst. In this way, the mpg-C3N4/TiO2 heterojunction catalyst has a porous structure and large surface area, which increases the contact area for pollutants. Rhodamine B (RhB) was used as a representative organic pollutant to evaluate the photocatalytic activity of the samples under visible light irradiation. The results show that the as-prepared mpg-C3N4/TiO2 heterojunction catalyst has a significantly enhanced visible light photocatalytic activity compared to pure mpg-C3N4 and that the degradation rate was 1.6 times higher than that of pure mpg-C3N4. The increased photocatalytic activity of the mpg-C3N4/TiO2 heterojunction catalyst can be attributed to the formation of the heterojunction between mpg-C3N4 and TiO2, which suppresses the recombination of photoinduced electron–hole pairs. Furthermore, based on systematic characterization and discussion, a possible photocatalytic mechanism for the excellent photocatalytic performance was proposed.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Yu Shao,Changsheng Cao,Shiliang Chen,Miao He,Jialin Fang,Jing Chen,Xiaofang Li,Danzhen Li
Nitrogen-doped and carbon species decorated TiO 2 composites (Cts/TiO 2 ) are prepared by using chitosan as a natural nitrogen and carbon source to combine with TiO 2 by a facile and low-cost method for the first time. Their structures and properties are characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N 2 adsorption–desorption isotherms (BET), and electron spin resonance spectroscopy (ESR). The results show that the visible light absorption range of the composites even can be extended to 650 nm. Photocatalytic degradation of Rhodamine B (RhB) under visible light (420 nm < λ < 800 nm) irradiation is used as a model reaction to evaluate the photocatalytic activity of the composites. When the additive amount of chitosan is 0.25 g, the sample Cts/TiO 2 -25 possesses the highest activity, which is over 4.8 times of N-TiO 2 . The detection of active species during the photocatalytic process shows that superoxide radicals (O 2 − ) play the most important role, then the probable degradation mechanism of the photocatalysts is proposed simultaneously. It is hoped that our work will open a new doorway to use a simple and green method to get high-efficiency TiO 2 -based photocatalysts.
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ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Yajun Zhang,Guohua Zhao,Huijie Shi,Ya-nan Zhang,Wenna Huang,Xiaofeng Huang,Zhongyi Wu
The development of highly efficient and low-cost approaches for catalytic hydrogen production from renewable energy is of tremendous importance for a truly sustainable hydrogen-based energy carrier in future life. Herein, the probability of utilizing solar light to product hydrogen from biomass derivative, glucose, was systematically demonstrated by using the periodically ordered TiO 2 nanotube arrays (TNTAs) assembled of Palladium quantum dots (Pd QDs), i.e. Pd QDs@ TNTAs as photoanode. The results showed that remarkably increased photocurrent density was obtained in the glucose solution compared to the pure KOH electrolyte over as-prepared photoelectrode, which indicated that the glucose could be faster oxidized than water oxidation, and thus could promote the hydrogen production on Pt cathode. The yield of hydrogen production from glucose oxidation reached as high as 164.8 μmol cm −1 over Pd QDs@TNTAs photoanode and Pt cathode system (denoted as Pd QDs@TNTAs/Pt) under the solar light irradiation for 6 h, which was about 15 times higher than that from pure water splitting. The superior hydrogen production performance could be attributed to the less endergonic process of the glucose oxidation than water, as well as the efficient synergistic photoelectrocatalytic (PEC) glucose oxidation over Pd QDs@TNTAs photoanode which possesses excellent photoelectrochemical performance and structure characteristics. Moreover, a probable mechanism for the PEC hydrogen production from biomass derivatives oxidation was proposed and discussed.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 21
·期 12
·3683-3691
·
IF 2.316
Gan Tian,Zhao Aixia,Wang Zhikai,Liu Pan,Sun Junyong,Liu Yanming
The present work is focused on a typical core-shell-structured SiO 2 @TiO 2 -based imprinted polymer composite, employed as a molecular recognition and sensing interface in the construction of an innovative electrochemical sensor. Herein, the methacrylic acid and a bronchodilator drug, theophylline, were used as functional monomer and template, respectively. The SiO 2 @TiO 2 served as a potential signal transducer to shuttle electrons between the binding sites and the electrode. Such modification induced an electrocatalytic effect and thereby greatly improved the electrode kinetics. The analytical features of the developed theophylline sensor have been accessed, and the results have indicated that an increase of differential pulse voltammetric current as compared to the corresponding traditional imprinted polymer modified electrode. Moreover, the sensor has showed high sensitivity, wider linear range (0.01–40 μM), lower detection limit (1.2 nM), and satisfactory long-term stability, which was validated with the complex matrices of tea, human blood serum, and urine, without any matrix effect and cross-reactivity.
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高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Zhaojie Wang,Ming Liu,Guijuan Wei,Peng Han,Xixia Zhao,Junxue Liu,Yan Zhou,Jun Zhang
The requirements of high power density, excellent cycling ability, flexibility and low cost, are of paramount importance and critical to develop flexible lithium ion batteries (LIBs) for wearable instruments. Here we reported the rational design and fabrication of a flexible self-supported lithium ion anode material, which consists of thin MoS 2 nanosheets grown on the surfaces of carbon@TiO 2 core-shell nanofibers. The resulting hierarchical ternary nanocomposites exhibited high reversible specific capacity (∼1460 mA h g −1 at 100 mA g −1 ), excellent cyclability (little capacity loss even after 1000 cycles) and rate performance (928 mA h g −1 at 2 A g −1 ) as anode in LIB. Furthermore, the binder-free anode material demonstrated new opportunities for flexible lithium ion batteries. The superior lithium storage performance is derived from the present well-designed hierarchical nanofiber structure and the synergic effect of different components and numerous interfaces.
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CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Lei Wang,Changbo Zhang,Feng Gao,Gilles Mailhot,Gang Pan
Algae as an abundant natural biomass, more attention has been paid to explore its potential application in environmental pollutants treatment. This work prepared the algae-TiO 2 /Ag bionano hybrid material by loading algae cells on the ultrafine TiO 2 /Ag chitosan hybrid nanofiber mat. For the first time, the synergistic photocatalytic effect of fresh algae and TiO 2 /Ag nanomaterial was investigated by removal of Cr(VI). The addition of algae significantly improved the photo-removal of Cr(VI) in the system with TiO 2 /Ag hybrid nanomaterial under visible light irradiation. Meanwhile, the photocatalytic mechanism was studied. The photogenerated reactive oxygen species were quantified and the addition of algae apparently decreased the yields of OH to 31.0 μM, while improved the yields of 1 O 2 and O 2 − in the reaction system with TiO 2 /Ag hybrid nanofiber mats. The change of superoxide dismutase activity and malondialdehyde content in algae indicated that TiO 2 /Ag could impose oxidative stress and cause lipid peroxidation in algae cells. During the course of irradiation, algae released substances could act as scavenger for holes, thus inhibited the recombination of hole/electron and enhanced the photocatalytic reduction of Cr(VI) by electrons on TiO 2 surface. Algae was simultaneously photodegraded in the system and the resulting O 2 − , organic free radicals could promote the reduction of Cr(VI). This functional hybrid nanofiber mat was easily recovered and maintained a great photocatalytic activity on the five successive cycles. This algae-photocatalyst hybrid material has promising applications potential in heavy metal removal and organic pollutants treatment.
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FIBERS AND POLYMERS
·
2016
·Vol. 17
·期 11
·1849-1857
·
IF 1.022
Zhang Bin,Han Jian
The poly(vinyl acetate) (PVAc)/zinc oxide (ZnO) microcapsule and PVAc/titanium dioxide (TiO 2 ) microcapsule were synthesized via in-situ emulsion polymerization method. The PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis(TG), transmission electron microscopy (TEM), and UV-visible spectroscopy (UV-vis). Effect of PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule on properties of poly(lactic acid) (PLA) was evaluated by UV-vis, SEM and mechanical properties test. The results showed that the addition of PVAc/ZnO and PVAc/TiO 2 microcapsules as a UV-blocking additive could significantly enhance UV-blocking property of PLA/PVAc/ZnO microcapsule composites and PLA/PVAc/TiO 2 microcapsule composites compared with pure PLA, PLA/ZnO composites and PLA/TiO 2 composites. The mechanical properties of PLA/PVAc/ZnO microcapsule composites were better than those of PLA/ZnO composites due to good dispersability and compatibility of PVAc/ZnO microcapsule in PLA matrix. Also, the mechanical properties of PLA/PVAc/TiO 2 microcapsule composites were better than those of pure PLA and PLA/TiO 2 composites. This study demonstrates the great potentials of the intrinsically UV shield additive PVAc/ZnO and PVAc/TiO 2 microcapsules in the application of high performance matrix resin and composite material.
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Scientific Reports
·
2016
·Vol. 6
·期 1
·1-15
·
IF 5.228
Zhang Qingzhe,Bao Nan,Wang Xinqiang,Hu Xinde,Miao Xinhan,Chaker Mohamed,Ma Dongling
In this article, a novel route for the synthesis of graphene/TiO 2 continuous fibers (GTF) using force-spinning combined with water vapor annealing method is reported for the first time. The morphology, structure and optical properties of the composite were fully characterized. With a single step of heat treatment process using steam at ambient conditions, we were able to initiate a series of chemical reactions, such as reduction of graphene oxide (GO), crystallization of TiO 2 , formation of C-Ti bond, and introduction of oxygen vacancies into TiO 2 . The incorporation of graphene in TiO 2 fibers facilitated bandgap narrowing and improved photo-induced charge separation in the photocatalyst. As a result of synergistic effects, TiO 2 fibers-2 wt% graphene (2%GTF) showed the highest photocatalytic activities in the degradation of X-3B under UV irradiation, superior to the benchmark photocatalyst P25. Under visible light irradiation, the same catalyst was about 4 times more efficient compared to pure TiO 2 fibers (PTF). A detailed study of involved active species (in particular, · , h + and ·OH) unraveled the mechanism regarding photocatalysis.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 31
·
IF 1.866
Wu Kuang,Zhongnan Liu,Guodong Kang,Dandan Liu,Meiqing Zhou,Yiming Cao
The poly(2-hydroxyethyl methacrylate) grafted titanium dioxide nanoparticles were synthesized and added to the substrate of flat-sheet thin film composite forward osmosis (TFC-FO) membranes. The hydrophilicity of substrate was improved, which was advantageous to enhance the water flux of TFC-FO membranes. The membranes containing a 3 wt % TiO 2 -PHEMA in the substrate exhibited a finger-like structure combined with sponge-like structure, while those with lower or without TiO 2 -PHEMA content showed fully finger-like structures. As for FO performance, the TFC-FO membranes with 3 wt % TiO 2 -PHEMA content achieved the highest water flux of 42.8 LMH and 24.2 LMH against the DI water using 2 M NaCl as the draw solution tested under the active layer against draw solution (AL-DS) mode and active layer against feed solution (AL-FS) mode, respectively. It was proven that the hydrophilic property of membrane substrates was a strong factor influencing the water flux in FO tests. Furthermore, the structural parameter was remarkably decreased with an increase of TiO 2 -PHEMA content in membrane substrate, indicating the reducing of internal concentration polarization. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43719.
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