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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高影响因子
Biomimetics
·
2025
·Vol. 10
·期 3
·144
·
IF 3.9
Zebang Yu,Hang Ping
Titanium dioxide demonstrates promising potential in the energy storage field due to its high theoretical specific capacity and economic viability. However, its practical application is hindered by intrinsic limitations including low electronic conductivity and slow lithium-ion transport. In general, nature inspires the biotemplating synthesis of artificially functional materials with hierarchical structures. Learning from the bioinspired synthesis process, we adopt a facile biomimetic approach to synthesize graphene-based anatase TiO2nanoparticle/nanorod hierarchical structure. The rod-shaped anatase is assembled nanoparticles with a diameter of 20 to 50 nm, and the surface of graphene is deposited by nanoparticles of 5 to 10 nm. The composite also possesses a high surface area and a mesoporous structure. This unique structure not only reduces the transportation pathway of lithium ions and electrons but also enhances the electric conductivity and tolerates the volume change. As an anode electrode, the bioinspired hierarchical structure exhibits a high reversible capacity of 160 mA h g−1after 180 cycles at a current rate of 1C, highlighting the effectiveness of bioinspired design.
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PubMed
高影响因子
Cancer Nanotechnology
·
2024
·Vol. 15
·期 1
·1-19
·
IF 4.5
Xu Liu,Wu Ruoyu,Ni Jiajing,Jin Lufei,Xu Kaiwei,Zhu Yuchao,Hong Lu,Chen Chunqu,Wang Linwei,Zhu Lubin,Zhou Weijian,Shen Wenqi,Wang Jianhua
Background The tumor-specific immune responses, essential for removing residual lesions and preventing tumor metastases, can be stimulated by tumor-associated antigens (TAAs) released following photothermal therapy (PTT). However, due to the immunosuppressed microenvironment of pancreatic ductal adenocarcinoma (PDAC), the TAAs released by PTT are difficult to induce an effective immune response. In this work, we prepared the mesoporous silica (mSiO 2 ) coated black titanium dioxide (bTiO 2 ) photothermal nanoparticles (NPs) for enhanced photothermal-immunotherapy toward PDAC, in which resiquimod (R848) was loaded and DOTA-Gd was conjugated. The NPs are specified as bTiO 2 @mSiO 2 @Gd/R848 and abbreviated to NPs/R848. R848 as a kind of Toll-like receptor 7/8 agonist can remodel the tumor microenvironment (TME) in PDAC and induce a strong immune response. Furthermore, DOTA-Gd serves as a magnetic resonance imaging (MRI) contrast agent to improve the T 1 -weighted MRI performance of the NPs. Results In vitro results of this study show that NPs/R848 could thermally ablate tumor cells and efficiently trigger dendritic cell (DC) maturation. The results of in vivo investigations demonstrate that the combined use of photothermal-immunotherapy exhibits a significant inhibitory effect on tumor growth. Besides, it promoted maturation of DCs and enhanced infiltration of CD8 + , CD4 + T cells to improve the TME in PDAC. Conclusions Our study anticipates that by encouraging the maturation of DCs, this strategy will improve the TME and enable the successful photothermal-immunotherapy of PDAC.
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高影响因子
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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高影响因子
Processes
·
2024
·Vol. 12
·期 9
·1879
·
IF 2.8
Huiying Yang,Xiangchao Meng
The conversion of nitrogen (N2) and water (H2O) into NH3by photocatalysis under ambient conditions has been considered an environmentally friendly strategy. However, developing effective catalysts for N2fixation is still challenging. Herein, we report a bimetallic JH Fe, Co/TiO2derived from NH2-MIL-125(Ti) by the fast Joule heating (FJH) method for visible–light–driven catalytic N2fixation. It was found that the photocatalytic N2reduction efficiency of bimetallic FC@TiO2-JH was improved, enabling an NH3yield rate of 110.14 µmol g−1h−1without any sacrificial agents. Furthermore, the rate was higher than those of Fe@TiO2-JH and Co@TiO2-JH, suggesting that the synergistic effect between Fe and Co broke the electronic equilibrium and increased the center of its d-band, enhancing electronic feedback to the antibonding π* orbitals of N2while weakening the bonding energy of N≡N. Meanwhile, the rate was about 2.75 times higher than that of FC@TiO2-TF, which was calcined in a tube furnace. It is assumed that FJH might lead to the formation of lattice defects, leading to localized charge deficiency, enhanced carrier separation, and transport. Thus, doping of Fe and Co synergistically interacted with the defects produced from FJH, facilitating the photocatalytic reduction process. As detected, it had a greater ability to separate hole–electron pairs and transferred electrons to adsorbed N2at faster rates. Our work demonstrates a prospective strategy for designing bimetallic catalysts derived from NH2-MIL-125(Ti) for N2fixation.
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高影响因子
Journal of Physical Chemistry C
·
2010
·
IF 4.224
Wenlan Wang,Qingkun Shang,Wei Zheng,Hui Yu,Xuejiao Feng,Zhidan Wang,Yabin Zhang,Guoqiang Li
A novel near-infrared antibacterial material, Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder, was synthesized and applied to kill Aeromonas hydrophia with a maximal bactericidal rate of 65% in 90 min under 980 nm laser irradiation. However, Fe3+-TiO2 or Er3+-Yb3+-TiO2 nanopowders obtained under the same conditions barely could kill Aeromonas hydrophia. The initial energy applied in the photocatalysis antibacterial process is supplied by the upconversion emission of Er3+ and Yb3+ and the codoping of Fe3+, which has intensified the light absorption intensity and enlarged the absorption range. The analyses of phase structure and the optical properties including XRD, UV−vis diffuse reflectance spectra, and upconversion photoluminescence spectra of Er3+-Yb3+-Fe3+ tridoped TiO2 nanopowder have been performed in detail to reveal the complex energy transfer and change mechanism. According to our experimental results, the mechanism has been demonstrated involving the upconversion emission, multistep excitation by means of intermediate energy level, capture and transfer electrons of Fe3+, and so on. The photocatalystic antibacterial function of Er3+-Yb3+-Fe3+-TiO2 under near-infrared instead of ultraviolet light is also reported. Because of the strong penetrability of near-infrared, this kind of material may be used in photodynamic therapy (PDT) to kill bacteria or tumors directly.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Ling Tan,Yufei Huang,Wei Mao,Xiayi Hu,Yangqiang Huang,Hao Chen,Xiao Luo
Diphenyl carbonate (DPC) is a crucial organic chemical intermediate that is widely applied for the synthesis of polycarbonate. The process of transesterification of dimethyl carbonate (DMC) and phenol to produce DPC is promising and is in line with the requirements of green transitions and raw material sustainability. In this work, anatase-layered titanium dioxide (A-TiO2) was prepared and applied for the efficient transesterification of DMC and phenol to synthesize DPC with 10.5% phenol conversion and 87.9% DPC selectivity. The high activity and selectivity of transesterification over A-TiO2 were ascribed via characterizations to the tetracoordinate Ti species and Lewis acid–base sites on the catalyst surface. We further studied the deactivation mechanism of this kind of A-TiO2, and it was found that Ti leaching and the deposition of organic compounds onto the catalyst surface were the major reasons for deactivation during transesterification. This study provides some insights into the design of highly active and selective catalysts for transesterification reactions.
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高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Dong Yanping,Xiqiang Tian,Hongji Zhao,Jintao Luo
The fabrication of small Pd nanoparticles (NPs) anchored on titanium dioxide (TiO 2 ) supports remains a great challenge due to its high surface energy. Herein, flower-like three dimensional (3D) TiO 2 microstructures assembled from needle flakes are fabricated thru a facile evaporation-induced assisted hydrothermal method, and then modified with amines group (3D-TiO 2 -NH 2 ). Small and uniform dispersed Pd nanoparticles were anchored on the surface of 3D-TiO 2 -NH 2 supports using polyol reduction method. Remarkably, the obtained 3D-TiO 2 -NH 2 supported Pd-based catalyst (Pd@3D-TiO 2 -NH 2 ) demonstrated an optimal 4-NP catalytic hydrogenation efficiency ( k = 1.09 min −1 ), which is 1.56 and 3.52 times superior than that of the Pd@3D-TiO 2 ( k = 0.699 min −1 ) and Pd@TiO 2 –P25 ( k = 0.31 min −1 ) catalysts, respectively. In-depth investigation of the structure-property relationship by SEM, XRD, N 2 adsorption-desorption isotherm, TEM, XPS, CO chemisorption and CO-FTIR reveal that the optimal catalytic hydrogenation activity of Pd@3D-TiO 2 -NH 2 can be credited to its 3D hierarchical structure (interconnected needle flakes) and the amines group existing on the surface of flower-like three dimensional hierarchical TiO 2 , which control the Pd particles size (2.7 nm) and uniform dispersion (43.5%) to generate more surface active Pd 0 entities over Pd@3D-TiO 2 -NH 2 .
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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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高影响因子
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
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2017
·Vol. 32
·期 6
·1186-1195
·
IF 3.379
Shan Li,Beibei Chen,Man He,Bin Hu
Protein phosphorylation analysis is important for understanding cell regulations. Mass spectrometry (MS) is a powerful technique for peptide phosphorylation analysis. However, quantification of low abundance phosphoproteins in a complex mixture of proteins is still a challenge. Here we report the development of hollow fiber (HF) supported TiO2 monolithic microextraction combined with capillary high performance liquid chromatography (capHPLC)-inductively coupled plasma-collision reaction cell (ICP-CRC)-MS for the absolute quantification of phosphopeptides. The membrane pores (∼200 nm) of the HF effectively carry more TiO2 on its surface to enhance the adherence of the TiO2 monolith with the HF. By using β-casein as a model phosphorylated protein, we optimized the HF-supported TiO2 monolithic microextraction towards phosphopeptides. Under the optimal conditions, a 100-fold enrichment factor was obtained and the monoliths can be reused 40 times. By monitoring 31P16O with O2 as a reaction gas in the CRC, polyatomic mass interference at m/z 31 is avoided and a low detection limit (2.9 nM) of phosphorus is achieved. The method of HF-supported TiO2 monolithic microextraction-capHPLC-ICP-MS provided the detection limit for phosphopeptides at the nM level. The proposed method was applied to the quantification of phosphopeptides in milk and milk powder samples.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2017
·
IF 4.421
Qiuling Ma,Huixuan Zhang,Yuqi Cui,Xiaoyong Deng,Ruonan Guo,Xiuwen Cheng,Mingzheng Xie,Qingfeng Cheng
Cu 2 O decorated TiO 2 nano-tube arrays (Cu 2 O/TiO 2 NTAs) photoelectrode was fabricated through electrodeposition strategy. Meanwhile, physicochemical properties of the resulting photoelectrode were systematically studied by series of measurements. Results indicated that Cu 2 O/TiO 2 NTAs photoelectrode performed a significantly enhanced light absorbance in the visible region between 400 and 800 nm, transient photocurrent density of 0.162 mA Cm −2 , photogenerated charge separation efficiency and 99.9% of photoelectrocatalytic efficiency for decomposition of 2,4,6-trichlorophenol within 120 min Xenon illumination with the help of +1.0 V (vs. SCE) potential. Furthermore, the enhanced visible light responsible photoelectrocatalytic mechanism was proposed and discussed.
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高影响因子
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