Food Analytical Methods
·
2025
·
IF 3
Li Congwei,Wang Beibei,Kang Kai,Wang Lanyue,Zhao Zhenzhen,Wang Yuping,Ji Xueping
To address ciprofloxacin (CIP) contamination in animal-derived foods, an ultrasensitive electrochemical sensing platform based on a novel ternary heterostructure (Ag-TiO 2 @Zr-TCBPE) was developed through interfacial engineering. The heterointerface was constructed by anchoring a metal–metal oxide electrocatalyst (Ag-TiO 2 ) onto a conductive metal–organic framework (Zr-TCBPE) with a 3D porous hexagonal prismatic structure and high conductivity. This work demonstrates for the first time that the large-scale conjugated architecture of Zr-TCBPE nanotubes enhances CIP enrichment, while the Ag-TiO 2 /Zr-TCBPE heterointerface optimizes electron transport pathways and synergistically promotes CIP oxidation via interfacial electric field-driven effects. Under acidic conditions (pH 5.0), the Ag-TiO 2 @Zr-TCBPE/GCE sensor exhibited optimal performance: a linear range spanning five orders of magnitude (2.5 nmol·L −1 to 150 μmol·L −1 ), a limit of detection (LOD) of 1.6 nmol·L −1 , surpassing most reported CIP sensors. The sensor also showed high anti-interference capability (97.1–107% signal retention), long-term stability (> 96.4% signal retention after 15 days), and satisfactory recovery rates (91.6–103%) in complex matrices (milk, eggs, and river water). This study provides fundamental insights into TCBPE-MOF heterointerface engineering and establishes a robust analytical platform for detecting trace antimicrobials in food and environmental samples.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Jinyi Ren,Sijia Liu,Jing Zhang,Xinfu Zhao,Shimo Yu,Zhipeng Yuan,Qingliang Guo,Xiaodong Shen,Xibin Yi
Developing highly efficient photocatalysts is crucial for solar-driven wastewater treatment, particularly in enhancing catalytic efficiency and visible-light response. In recent years, most researchers have utilized hydrothermal methods to integrate TiO₂ with graphene aerogels, thereby improving charge separation efficiency. However, severe buildup of graphene sheets will result in insufficient absorption of visible light. To address the limitation, this work directly used titanium dioxide aerogel as the framework, introduced graphene and nano-Cu particles, and combined the sol-gel method to construct a TiO 2 -GO-Cu ternary aerogel structure(TGCA), achieving the multi-component synergistic effect of the active components. The phase composition and mesoporous structure of the material were characterized by scanning electron microscopy, ultraviolet-visible spectrophotometry, N 2 adsorption test, etc. A large specific surface area of 692.9 m 2 /g and excellent pore structure were achieved. Moreover, under visible light irradiation, the degradation efficiency of Rhodamine B (RhB) reached 100% within 30 minutes, and the band gap was reduced to 2.75 eV. After eight cycles, the photocatalyst retained 76.18% of its degradation efficiency, outperforming most TiO₂-graphene materials. This study significantly improved the photocatalytic performance of the catalyst through structural regulation, optimization of electron transport, and enhancement of light absorption. It thereby offers a feasible approach and valuable reference for solar-driven wastewater treatment technologies.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Renquan Guan,Xueying Cheng,Weilong Che,Yunning Chen,Zhengkai Wu,Qingkun Shang
The efficient adsorption and activation of nitrogen by photocatalysts, as well as the rapid transport and separation of charge carriers, are key factors affecting the efficiency of photocatalytic ammonia synthesis. This article achieves simultaneous regulation of surface hydrophobicity and carrier transport of defective TiO2 (Vo-TiO2) based on seven bipyridine derivatives with different substituent types and positions. Among the seven prepared composite photocatalysts, Vo-TiO2 modified with 2,2-bipyridyl-6,6-dicarboxylic acid (6-dcbpy-Vo-TiO2) has a photocatalytic activity of 768 μmol g–1 h–1 for ammonia synthesis. By examining the hydrophobicity, absorbance, structural characteristics, defect changes, photoelectrochemical characteristics, etc. of the seven composite photocatalysts obtained and combining theoretical calculations, the influence mechanism of different substituent types and positions of bipyridine derivatives on the photocatalytic performance of Vo-TiO2 for synthetic ammonia was revealed. This work provides an effective reference for the application of bipyridine derivatives on the photocatalytic nitrogen fixation for ammonia synthesis.
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2024
·
IF 4.2
Cheng Wang,Fuling Du,Lipeng Wang,Qianru Yu,Xinchao Liang,Siqi Liu,Zhe Lei
TiO 2 /ZSM-5 composites with enhanced adsorption and photocatalytic properties were synthesized via regulation of synthesis pH value and post (acid/alkali) treatment of ZSM-5. The influences of synthesis pH values and post-treatment of ZSM-5 on microstructure, adsorption and photocatalytic properties of the composites were investigated. The methyl orange was used to assess the adsorption and photocatalytic properties of the samples. The results showed that the synthesis pH values and acid/alkali treatment had significant influences on the microstructure, adsorption and photocatalytic properties of TiO 2 /ZSM-5 composites. The composites synthesized at pH 7 had a relatively higher TiO 2 content, smaller anatase crystallite size, greater specific surface area, the most effective separation of photogenerated electron-hole pairs, the fastest interfacial charge transfer, and therefore exhibited excellent adsorption and photocatalytic properties. Acid treatment could significantly increase the specific surface area, Si/Al ratio of ZSM-5, the separation efficiency of photogenerated electron-hole pairs, and amount of produced active free radicals •O 2 – and •OH. The TiO 2 /acid-treated ZSM-5 exhibited excellent photodegradation with 99.3 % methyl orange in 150 min, which is higher than that of the TiO 2 /ZSM-5 and TiO 2 /alkali-treated ZSM-5.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yantao Song,Meng Yan,Zixuan Xu,Benqiao He,Biao Wu,Jianxin Li,Zhenyu Cui
In this study, the 3-Aminopropyltriethoxysilane (APTES) was first grafted onto TiO 2 nanoparticles (APTES-TiO 2 nanoparticles), which were then introduced the membrane surface by reacting with anhydride on the membrane surface and Schiff base reaction with the PEI-TA. There are two types of hollow fiber hybrid membranes with varying nanoparticle distributions were constructed. The influence of hybrid mode on the ability of anti-oil fouling was researched. The results indicated that the PVDF@TiO 2 hybrid membrane has a flux recovery rate of 96.68 % and a total flux decline rate of 15.52 %, indicating a good anti-emulsified oil fouling performance. By characterizing the anti-oil droplets adhesion, water-binding capacity, surface charge of membrane and concentrate system coacervate size, the coalescence ability of the hybrid membrane to the oil droplets and the spreading behavior of oil droplets on the surface were uncovered. Ultimately, the anti-fouling mechanism “hydration layer &rigid layer obstruction-electrostatic coalescence” was proposed, which can reasonably explain the weakness of the interplay between the membrane surface and oil droplets, thus slowing down the attaching and spreading of emulsified oil droplets. This study laid the foundation for developing hybrid membranes with high resistance to emulsified oil fouling ability. The proposed anti-fouling mechanism can provide new ideas for the efficient purification of oily wastewater.
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高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
To address the two critical issues of low near-infrared (NIR) photon utilization and poor ultraviolet (UV) stability in perovskite solar cells (PSCs), this study synthesized Sm 3+ and Er 3+ co-doped TiO 2 nanorod (NRs) arrays via a hydrothermal method and employed them as the electron transport layer (ETL) for carbon-based PSCs. The incorporation of Sm 3+ and Er 3+ simultaneously improves perovskite infiltration, carrier-transport efficiency, and light absorption performance. Compared with pristine TiO 2 , the Sm/Er co-doped NRs effectively suppress non-radiative recombination, reduce series resistance, improve electron mobility, and prolong carrier lifetime. Furthermore, the introduction of Sm 3+ , Er 3+ into TiO 2 NRs weakens the radial growth of nanorods. A positive bandgap shift and a negative flat-band potential shift were observed after doping. The co-doped PSCs achieved 12 % increase in conversion efficiency when compared with the undoped device. The doped perovskite exhibited strong resistance to ultraviolet-induced degradation. The device has an infrared light efficiency of 0.15 % at the wavelength of 800–1100 nm.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Renjie Li,Anli Chen,Qunfen Deng,Yujia Zhong,Ling Kong,Rui Yang
In this work, using melamine and MXene powder as precursors, NH 4 Cl as a template, a novel S-scheme heterojunction composite material g-C 3 N 4 /C-TiO 2 was synthesized by a one-step calcination method. During the calcination process, the gas template NH 4 Cl played a dual role, which not only striped the massive g-C 3 N 4 into porous flakes with a larger specific surface area but also striped the agglomerated MXene derivatives (C-TiO 2 ) nanoparticles, making them bind more closely with g-C 3 N 4 . The charge separation efficiency and photocatalytic performance were greatly improved due to the formation of heterojunction and the larger specific surface area of the sample. Within 50 min, the g-C 3 N 4 /C-TiO 2 exhibited high photocatalytic performance toward ciprofloxacin hydrochloride (CIP·HCl) with degradation efficiencies of 88.14% under visible light (λ ≥ 420 nm), which was 8.9 times higher than that of pure g-C 3 N 4 . In addition, we also used a series of characterizations to confirm the mechanism of S-scheme heterojunction and inferred the possible CIP photodegradation pathway.
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 152
·期 12
·3594-3606
·
IF 2.936
Yao Haoyang,Xu Yunlan,Zhong Dengjie,Zeng Yundong,Zhong Nianbing
In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The maximum photocurrent density is 2.31 mA·cm −2 , which is 1.76 times higher than that of WO 3 /TiO 2 /Ti at 1.1 V (vs. SCE). The maximum power density, phontocurrent density and Rhodamine B degradation rate of photocatalytic fuel cell (PFC) with PPy-14%/WO 3 /TiO 2 /Ti photoanode and Cu cathode are 25.48 μW·cm −2 , 0.25 mA·cm −2 and 88.5%, respectively. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively. This not only expands the light absorption range and enhances the light absorption intensity, but also improves the separation of electron–hole pairs, and finally significantly enhances the Rhodamine B degradation and electricity generation performance of PFC. Graphical Abstract In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2017
·Vol. 92
·期 8
·2038-2049
·
IF 3.135
Yanqun Song,Chuan Rong,Jiaobo Shang,Yinghui Wang,Yuanyuan Zhang,Kefu Yu
BACKGROUND The heterogeneous photo-Fenton-like process is emerging as a promising treatment of dye-containing wastewater because of its economic feasibility and high efficiency. However, it is still required to develop photo-Fenton-like catalysts with highly selective degradation ability and reusability. RESULTS Inorganic-framework molecularly imprinted Fe-doped TiO 2 composites (MIP/Fe–TiO 2 ) were successfully prepared by the sol–gel method, with acid orange II as the template and TiO 2 as the matrix material. The photo-Fenton-like catalysts were characterized using FESEM, EDS, BET, X-ray diffraction, FT-IR spectroscopy and UV–vis diffuse reflectance spectroscopy. These methods revealed the well-crystallized anatase phase and good nanometer-level particle sizes. The adsorption property and photo-Fenton-like activity of the catalysts were also studied in single and binary systems, respectively. CONCLUSIONS Compared with non-imprinted Fe–TiO 2 composites (NIP/Fe–TiO 2 ), MIP/Fe–TiO 2 showed higher adsorption capacity and selectivity toward the template molecule. In addition, it was found that the molecular recognition ability of MIP/Fe–TiO 2 provided the catalysts with rapidly selective photo-Fenton-like degradation of low target pollutant levels (20 mg L −1 ) in the presence of high levels of interferential pollutant sodium dodecyl benzene sulfonate (100 mg L −1 ). Moreover, because of the stable physicochemical properties of the inorganic framework, the new photo-Fenton-like catalysts were resistant to photochemical attack and showed favorable reusability. © 2017 Society of Chemical Industry
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COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Mengna Dong,Xinyu Sun,Tong Bu,Hui Zhang,Jiao Wang,Kunyi He,Lihua Li,Zhenyu Li,Li Wang
With the increasingly serious problem of antimicrobial resistance and the lack of clinical response strategies, the development of new antibacterial materials is imminent. Herein, a VIS/NIR co-irradiation photodynamic-photothermal and oxidase-like synergistic antibacterial platform of transition metal sulfide/TiO 2 nanofibers (TMSs/TiO 2 NFs) is proposed to fight bacterial infection. On one hand, three-dimensional (3D) MoS 2 nanoflowers load can quickly capture the photogenerated electrons of two-dimensional (2D) TiO 2 nanofibers, inhibit the recombination of electron-hole pairs and greatly increase the yield of reactive oxygen species (ROS), thereby overcoming the UV sterilization defects of pure TiO 2 , endowing TiO 2 excellent photodynamic antibacterial ability in the long-wavelength region. On other hand, with the combination of MoS 2 and TiO 2 , the photothermal effect of the 3D/2D heterostructure (MoS 2 /TiO 2 NFs) was significantly enhanced and the local temperature rose to above 50 °C in a short time, which was enough to induce the inactivation of bacterial protein, thereby providing an efficient secondary sterilization effect. In addition, MoS 2 /TiO 2 NFs has fascinating oxidase-like activity, which further accelerated the oxidation of physiologically relevant antioxidants in bacteria. In the end, MoS 2 /TiO 2 NFs exerted outstanding antibacterial efficiencies against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) through the synergy of photodynamic-photothermal and oxidase-like performance. Meanwhile, MoS 2 /TiO 2 NFs antibacterial platform effectively accelerated the healing of S. aureus -infected wounds and showed negligible toxicity and hemolysis on normal cells and tissues. Hence, this study contributed an effective alternative strategy for reducing the use of antibiotics, providing new ideas for application of semiconductor nanomaterials in collaborative combination therapy.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Chen Chen,Ximo Wang,Yingfang Zhang,Xingying Li,Huiju Gao,Geoffrey I.N. Waterhouse,Xuguang Qiao,Zhixiang Xu
Herein, a molecularly imprinted surface-enhanced Raman spectroscopy (SERS) sensor was developed for the selective capture and sensitive detection of tryptamine in foods. The SERS sensor exploited silver nanoparticle-decorated TiO 2 (TiO 2 @Ag) substrates for Raman signal enhancement via synergistic effect of electromagnetic enhancement and photoinduced charge-transfer, whilst surface functionalization with the molecularly imprinted polymer ensured selective tryptamine capture. The SERS spectrum of tryptamine on the sensor closely matched that predicted by density functional simulations. The SERS intensity for tryptamine on the developed TiO 2 @ [email protected] sensor increased linearly with the logarithm of the tryptamine concentration over the range of 10 −6 –10 −2 mol L −1 , with a LOD of 4.85 × 10 −7 mol L −1 . Tryptamine was detected in a spiked white vinegar sample, and its recoveries were in the range of 92.00%–111.40%. The SERS sensor could be used for the detection of tryptamine in actual samples.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xiaojing Zhang,Yue Zhou,Tengfei Xu,Kaiwei Zheng,Rongrong Zhang,Zhaoxue Peng,Hongzhong Zhang
In this study, a sequencing batch reactor (SBR) was operated as Anammox and used as parent reactor. Then three SBRs seeded from the parent reactor were adopted for investigating the effect of CuO, ZnO and TiO 2 nanoparticles (NPs) on nitrogen removal, microbial activity and microbial communities of Anammox. The bioactivities of anaerobic ammonia-oxidizing bacteria (AAOB) after different exposure period were detected by batch experiments. Results showed that NPs performed immediate and durable toxicity on Anammox. The nitrogen removal efficiency decreased to 2.3%, 2.9% and 14.0% from 71%, the Anammox rate decreased to 0.13, 0.16 and 0.75 from 2.76 mg h −1 g −1 VSS, and the relative abundance of AAOB decreased to 2.57%, 2.78% and 2.61% from 7.99%, respectively. CuO and ZnO NPs performed similar effect, while CuO NPs led to the most severe toxicity and lowest accumulative effect. TiO 2 NPs showed the lowest toxicity but most durable suppression on Anammox process.
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