MATERIALS SCIENCE-POLAND
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2023
·Vol. 41
·期 2
·354-367
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IF 1.1
Biyang Tuo,Xiulong Shi,Jinwang Tian,Jianli Wang
To broaden the light response range of TiO2 and improve its photocatalytic activity, BiOCl/TiO2/MMT composite materials (BTMC) with outstanding photocatalytic performance were prepared by the sol-gel method with montmorillonite (MMT) as the supporting material, tetrabutyl titanate as titanium source and, bismuth nitrate pentahydrate as the bismuth source. The properties of the prepared materials were characterized by X-ray diffractometer (XRD), surface and porosity analysis (BET), scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), and ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS). When the Bi/Ti molar ratio was 20%, the composite material exhibited a slit mesoporous structure, and its specific surface area was 109.02 m2/g, with optimum photocatalytic activity. TiO2 and BiOCl formed the type-II heterojunction on the surface of MMT, which facilitates the transfer of photogenerated electrons and holes, thus enhancing the photocatalytic activity of BTMC-20. The results of this study indicated that BTMC-20 is a promising photocatalytic composite material and has better photocatalytic properties under visible light.
研究领域:
材料科学
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环境科学
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Surfaces and Interfaces
·
2024
·
IF 5.7
Rui You,Zhiyang He,Feng Xue,Shengui Ju
The lithium-ion sieve primarily exists in powder form, which poses challenges such as poor fluidity and permeability, as well as difficulties in recovery. The H₂TiO₃ (HTO) particles were introduced into polyacrylamide (PAM) via in situ polymerization to prepare a tough and porous nanocomposite hydrogel (HTO@PAM). This method effectively addresses the recovery difficulties associated with powdered lithium-ion sieves and, due to the hydrophilic groups in polyacrylamide, enhances the desorption of Li + and improves the adsorption performance. The results show that HTO@PAM-4 is the optimal ratio, with an adsorption performance of 32.8 mg/g. Tensile strength tests using a universal testing machine indicated that HTO@PAM-4 has a tensile strength of 0.19 MPa, demonstrating excellent mechanical properties. Infrared spectroscopy detected the presence of hydrophilic groups (-CONH 2 ) in HTO@PAM, and surface tension measurements showed a water contact angle of 8.9 °, indicating good hydrophilicity. The recyclability of HTO@PAM-4 was investigated, and after six cycles, the adsorption capacity was 25.4 mg/g, which is 77 % of the maximum adsorption performance, demonstrating recyclability. The results indicate that HTO@PAM exhibits excellent mechanical properties, adsorption performance, and recyclability, making it a material with promising practical applications.
研究领域:
材料科学
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环境工程
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Fengjiao Duan,Chenchen Liu,Xiaocan Liu,Lingling Wang,Shuai Zhang,Xiaobo Liu
In recent years, metal ions have been cross-linked with composite to improve their adsorption capacity, which has a wide range of applications in environmental treatment, biomedicine and other fields. In this work, Fe 3+ was complexed with block polyarylene ether nitrile (PEN) to form regular cubic blocks, which provided sufficient sites for the attachment of TiO 2 . Four types of PEN-Fe 3+ @TiO 2 hybrid cubes were successfully prepared by changing the content of TiO 2 . The adsorption and photocatalytic degradation properties of PEN-Fe 3+ @TiO 2 were evaluated by UV-Vis spectrophotometer. The results showed that the adsorption capacity of PEN-Fe 3+ @TiO 2 increased with the increase of TiO 2 , and the maximum adsorption capacity and the photocatalytic degradation ratio reached 914.42 mg/g and 99%, respectively. The effect of pH on the adsorption capacity was further studied and it was found that the PEN-Fe 3+ @TiO 2 composites showed better adsorption property under alkaline conditions. Moreover, the adsorption kinetic fitting showed that the whole adsorption process obeyed the pseudo-second-order kinetic model, which indicated that the adsorption process was dominated by chemical adsorption .
研究领域:
环境科学
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材料科学
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2026
·
IF 2.9
Yanhong Gu,Xi Cheng,Rui xue Wang,Yun long Zhai,Peng cheng Gu,Weiying Zhang,yaohua hu,Xianghui Zhang,Zhenjiang Shen,Wanping Chen,Jianguo Zhao
Overall, the current research on the friction catalysis mechanism mainly focuses on two explanations: electron transfer and electron transition. However, the mechanism of electron transition has always been a speculative concept, lacking direct proof and evidence. In this study, the direct bandgap anatase and the indirect bandgap rutile were utilized for the friction catalytic degradation of rhodamine at concentrations of 100, 300, and 500 respectively. The mechanism of friction catalysis was then investigated and elucidated. TiO2 with anatase structure is indirect bandgap semiconductor. Due to this, the electrons and holes excited by friction catalysis do not easily recombine, thus exhibiting excellent friction catalytic performance. For a 500 concentration of rhodamine dye approaching the actual concentration of industrial dyes, the anatase structure TiO2 has a degradation rate of 100% after 25 h. However, for the rutile anatase structure of TiO2, since it is a direct bandgap semiconductor, the recombination of excited electrons and holes occurs, and the degradation rate of the rhodamine dye at a 500 mg/L is almost 20% after 25 h. This result provides a more favorable experimental proof and evidence for the electron transition facilitated by friction, and will undoubtedly offer theoretical and experimental references for future research on friction catalysis. This investigation will help us gain a deeper understanding of the catalytic mechanism and principles of friction-induced catalysis.
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Advanced Composites and Hybrid Materials
·
2026
·Vol. 9
·期 3
·266
·
IF 15.5
Liu Xiaoyu,Sun Jie,Galluzzi Massimiliano,Zhong Huanqiong,Zhou Zhenfu,Chen Shiguo
Pathogenic microbes and house dust mites (HDM) are critical factors associated with severe asthma and pathogenic infections that severely threaten human health worldwide. Therefore, it is urgent to develop biocide alternatives to inactivate pathogenic microbes and HDM, and to reduce immunogenicity of HMD. Silver (Ag)/titanium dioxide (TiO 2 ) nanoparticle (ATN) exhibits a significant synergistic enhancement effect due to destructive reactive oxygen species (ROS) generation under UV irradiation, while its antimicrobial and acaricidal activities and related action mechanisms without light irradiation are still unclear. Herein, a water-dispersible ATN was prepared facilely by a photocatalytic reduction process. ATN exhibited improved antimicrobial activity due to synergistic antimicrobial effect of Ag and TiO 2 based on destructive nitric oxide (NO) generation in the absence of light. And ATN exhibited good acaricidal activity against HDM due to oxidative stress-induced mitochondrial disorder, lysosome swelling and rupture arising from NO generation. Especially, ATN can effectively reduce immunogenic Dermatophagoides farinae group 1 (Der f 1) and Dermatophagoides farinae group 2 (Der f 2). The work proposes an alternative approach to develop biocide alternatives and acaricidal materials, and it can help readers better comprehension of synergistically enhanced antimicrobial and acaricidal activities and relative action mechanisms of meta doped TiO 2 nanoparticles.
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ChemistrySelect
·
2025
·Vol. 10
·期 22
·e01220
·
IF 2
Neng Guo,Shuaipeng Li,Dongdong Zhu,Yufan Wu,Dongjin Wang,Yaru Wang,Zhiguo Sun,Shengwen Chen,Jifen Wang
Graphical In this paper, Sodium humate/TiO 2 composite nanoparticles (HA-Ti) were synthesized via a hydrothermal method, exhibiting uniform nanowire morphology with enhanced specific surface area and mesoporous structure. Synergistic interactions between HA-Na and TiO 2 significantly improved NO removal efficiency, driven by optimized oxygen-containing functional groups and interfacial charge transfer, offering an eco-friendly strategy for efficient NO x control and low-grade coal valorization. Notably, the post-denitrification products, rich in humic acid derivatives, can be directly repurposed for the production of humic acid compound fertilizers. Humic acid (HA) can be efficiently extracted from low-grade coal, a sustainable approach that enhances resource utilization efficiency while simultaneously addressing environmental concerns associated with the accumulation of extensive weathered coal reserves. In this study, sodium humate/TiO₂composite nanoparticles (HA-Ti) were developed via a hydrothermal synthesis method by integrating sodium humate (HA-Na) with TiO 2 . The effects of process parameters on the structural and functional properties of HA-Ti were systematically investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, and X-ray photoelectron spectroscopy (XPS). Denitrification performance was evaluated under varying hydrothermal conditions, including duration, temperature, and NaOH concentration. Results revealed that the incorporation of TiO₂ nanoparticles significantly enhanced the specific surface area (147.91 m 2 /g) and pore structure of HA-Na. The composite demonstrated significantly enhanced physicochemical activity compared to pristine HA-Na, attributed to the synergistic interaction between HA-Na and TiO 2 . HA-Ti exhibited exceptional denitrification performance, achieving an NO removal efficiency of 83.8% under optimized conditions. This work highlights the potential of HA-Ti composites as an eco-friendly and efficient solution for NO x pollution control, while advancing the high-value utilization of low-grade coal resources.
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Journal of Materials Chemistry B
·
2023
·
IF 7
Wei Zhang,Hongrang Chen,Haotian Tian,Qiang Niu,Jianghao Xing,Tao Wang,Xulin Chen,Xianwen Wang
To combat multidrug-resistant bacteria, researchers have poured into the development and design of antimicrobial agents. Here, low-cost two-dimensional (2D) antibacterial material titanium monoxide nanosheets (TiO NSs) were prepared by an ultrasonic-assisted liquid-phase exfoliation method. When cultured with bacteria, TiO NSs showed intrinsic antimicrobial capacity, possibly due to membrane damage caused by the sharp edges of TiO NSs. Under near-infrared (NIR) laser irradiation, TiO NSs showed high photothermal conversion efficiency (PTCE) and sterilization efficiency. By combining these two antibacterial mechanisms, TiO NSs exhibited a strong killing effect on Gram-negative Escherichia coli (E. coli) and Gram-positive methicillin-resistant Staphylococcus aureus (MRSA). Especially after treatment with TiO NSs (150 μg mL−1) +near-infrared (NIR) light irradiation, both bacteria were completely killed. In vivo experiments on wound repair of bacterial infection further confirmed its antibacterial effect. In addition, TiO NSs had no obvious toxicity or side effects, so as a kind of broad-spectrum 2D antibacterial nanoagent, TiO NSs have broad application prospects in the field of pathogen infection.
研究领域:
材料科学
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纳米技术
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生物医学工程
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微生物学
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药学
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ULTRASONICS SONOCHEMISTRY
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2019
·
IF 7.279
Guanshu Li,Ludong Yi,Jun Wang,Youtao Song
In this paper, a novel method, hydrodynamic cavitation (HC) combined with Fe 3+ -doped TiO 2 , for the degradation of organic pollutants in aqueous solution is reported. The venturi tubes with different geometric parameters (size, shape and half divergent angle) are designed to obtain a strong HC effect. The structure, morphology and chemical composition of prepared Fe 3+ -doped TiO 2 as catalyst are characterized via using XRD , SEM, TEM , XPS, UV-vis DRS and PL methods. The effects of added TiO 2 (heat-treated at different temperatures for different times) and Fe 3+ -doped TiO 2 (with different mole ratios of Fe and Ti) on the HC catalytic degradation of RhB are discussed. The influences of operation parameters including inlet pressure, initial RhB concentration and operating temperature on the HC catalytic degradation of RhB are studied by Box-Behnken design (BBD) and response surface methodology (RSM). Under 3.0 bar inlet pressure for 10 mg/L initial concentration of RhB solution at 40 °C operating temperature in the presence of Fe 3+ -doped TiO 2 with 0.05:1.00 M ratio of Fe and Ti, the best HC degradation ratio can be obtained (91.11%). Furthermore, a possible mechanism of HC degradation of organic pollutants in the presence of Fe 3+ -doped TiO 2 is proposed. Perhaps, this study may provide a feasible method for a large-scale treatment of dye wastewater.
研究领域:
环境科学
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化学工程
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yingying Qin,Hong Li,Jian Lu,Fanying Meng,Changchang Ma,Yongsheng Yan,Minjia Meng
In the practical photocatalytic hydrogen evolution process, the light absorption, charge carrier separation and optimizing the activation ability of reactive molecules are the pivotal factors that restrict photocatalytic performance. Hence, we rationally engineer novel CdS/Ti 3+ /N-TiO 2 (TNTC) composite photocatalyst via integrating the evaporation induced self-assembly (EISA) and in-situ hydrothermal method. In the TNTC system, Ti 3+ /O V and doped N respectively locate at below the conduction band (CB) and above the valence band (VB) of TiO 2 to shorten the band gap from two inverse directions, thereby improving light utilization efficiency. The type II heterojunction TNTC with interfacial coupling effect can foster the spatial charge separation and the Ti 3+ can form hydrogenation layer to reduce the activation barrier of H 2 , which all can improve H 2 evolution capacity. Integrating with the above advantageous qualities, the 10%CdS/Ti 3+ /N-TiO 2 (TNTC10) has the best photocatalytic H 2 evolution activity (1118.5 μmol), which is about 15 and 40 times higher than that of CdS (71.6 μmol) and Ti 3+ /N-TiO 2 (TNT, 27.7 μmol), respectively. Furthermore, we also test the photocatalytic activity of 10%CdS/N-TiO 2 (NTC10) to facilitate comparison with TNTC10. Expectedly, the photocatalytic activity of TNTC10 is 6 times higher than that of NTC10 (178.3 μmol), uncovering that the Ti 3+ hydrogenated layer plays a pivotal role in boosting the efficiency of H 2 evolution. It is hoped that this work will provide a new cognitive perspective and understanding for building new-fashioned hydrogen evolution photocatalysts.
研究领域:
材料科学
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能源化学
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Nanoscale
·
2026
·
IF 5.2
Yunfan Chen,Tengjiao Zhu,Langran Wang,Yechen Wang,Qizhao Tan,Yun Tian,Lu Zhao,Qi An,Gao Si
Osteomyelitis is a progressive bone infection with high disability and recurrence rates. However, current diagnostic approaches, including bacterial culture, imaging, and serological assays, suffer from poor sensitivity, low specificity, and delayed turnaround, making intraoperative evaluation particularly challenging. Here, we present an Ag-TiO₂-based surface-enhanced Raman scattering (SERS) platform for rapid, label-free detection of osteomyelitis using minimal volumes of wound saline irrigation fluid (WSIF). Benefiting from the synergistic interplay between electromagnetic field amplification and enhanced interfacial charge-transfer interactions, the Ag-TiO₂ substrate provides ultrasensitive detection with high spectral reproducibility, enabling reliable identification of subtle biochemical changes in complex clinical samples. Quantitative analysis indicates that strengthened charge-transfer processes significantly enhance molecular Raman responses, while plasmonic electromagnetic effects remain essential for overall signal amplification. Distinct Raman fingerprints of infected, non-infected, and recovered patients were successfully classified using artificial intelligence (AI) models, revealing metabolic alterations in amino acids, purines, proteins, and lipids associated with bacterial infection and immune response. This integration of SERS with AI not only elucidates the mechanistic basis of spectral enhancement but also demonstrates clinical feasibility for intraoperative osteomyelitis diagnosis, offering a promising strategy to improve surgical precision and reduce recurrence risk.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Jiawei Zhao,Bin Wang,Yaru Zhao,Mingming Hou,Changhui Xin,Qian Li,Xin Yu
Strong visible-light absorption and high surface areas contribute to high-perform semiconductor photocatalysis . This work aims to fabricate self-doped Ti 3+ -TiO 2 microspheres and dye sensitized self-doped Ti 3+ -TiO 2 composites with high surface areas and visible-light absorption via one-pot solvothermal strategy for highly enhanced photocatalytic tetracycline degradation under visible-light irradiation. The experimental results showed that the obtained Ti 3+ -TiO 2 microspheres showed enhanced visible-light capture capacity and a larger surface area of 204.9 m 2 g −1 . Besides, the obtained Eosin Y/Ti 3+ -TiO 2 composites showed efficient visible-light absorption and highly boosted photocatalytic performance towards tetracycline degradation. The highest rate constant for Eosin Y/Ti 3+ -TiO 2 -9% composite reached as high as 0.06657 min −1 , approximately 8.09 times that of commercial TiO 2 , strongly demonstrating the significant roles of dye sensitization. Finally, a reasonable dye-sensitization visible-light photocatalytic mechanism was suggested.
研究领域:
材料科学
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环境科学
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International Journal of Electrochemical Science
·
2025
·
IF 2.4
Wei Zhou,Kun Wang,Lipeng Pei
Early and accurate detection of ovarian cancer is essential for improving patient outcomes, as most cases are diagnosed at an advanced stage. Cancer antigen 125 (CA125) is a clinically established biomarker that plays a critical role in the diagnosis, prognosis, and recurrence monitoring of epithelial ovarian carcinoma. This study presents a dual-channel electrochemical platform employing ZnO@TiO 2 nanotube arrays for the immunoanalysis of CA125 in complex biological matrices. The nanostructured electrode, fabricated through a sequential hydrothermal and annealing process, exhibited vertically aligned tubular morphology with a mean length of ~2.5 µm and shell thickness of ~20 nm. Electrochemical measurements leveraged dopamine and cytosine as reduction and oxidation probes, respectively, enabling orthogonal signal acquisition. Differential pulse voltammetry revealed wide linear response ranges: 0.1–1000 mU∙mL -1 for cytosine (R² = 0.996; LOD = 0.0002 mU∙mL -1 ) and 0.1–100 mU∙mL -1 for dopamine (R² = 0.992; LOD = 0.0025 mU∙mL -1 ). Impedance spectroscopy confirmed systematic resistance increases during antibody immobilization and antigen binding. The sensor demonstrated excellent reproducibility (RSD ≤ 8.9%), signal stability over 30 days (≥89.1% retention), and selectivity against six common interferents with <5% deviation. Application in 0.2% diluted serum showed recoveries from 99.6% to 100.0% and RSDs <2.01%, validating its performance in real matrices. The combination of core–shell architecture, dual-probe mechanism, and surface regeneration capability positions this system as a promising diagnostic platform for clinical biosensing.
研究领域:
临床诊断
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生物分析化学
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纳米材料
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电化学
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生物传感器
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癌症标志物
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