JOURNAL OF MATERIALS RESEARCH
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2025
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IF 2.9
Yang Wen,Wang Yujia,Gao Na,Zhu Zhengfa,Chen Yuanyuan,Wang Hao,Tang Xiaoning
Designing efficient visible light-driven photocatalytic antimicrobial agents presents significant challenges. In this study, S-shaped core–shell NH 2 -MIL-125/TiO 2 (NT-x) heterojunctions were constructed by simple in situ solvothermal method, as photocatalytic antimicrobial agents for efficient bactericidal use under visible light. Notably, 99.99% inhibition was achieved for both Escherichia coli and Staphylococcus aureus at low concentrations (0.02 and 0.035 mg mL −1 , respectively) after exposure to simulated sunlight for 20 min. Reasonable energy band configuration and built-in electric field of this structure provided improved photogenerated carrier transfer paths as well as enhanced separation and transport efficiency. Moreover, the core–shell structure enhanced the interaction between NH 2 -MIL-125 and TiO 2 , increased the total number of reactive sites, and promoted the efficient generation of reactive oxygen species. Finally, possible mechanisms for the inactivation of bacteria were discussed. This research offers new perspectives for the advancement of advanced metal–organic framework-based photocatalysts with antibacterial activity under visible light. Graphical abstract
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高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Jiale Dou,Zhuwei Yang,Linsen Li,Xinyi Hu,Li Lin,Lixia Ling,Zhao Jiang
With the global energy structure transitioning towards decarbonization, hydrogen energy has emerged as a critical energy carrier due to its merits of zero carbon emissions and high energy density. As a candidate material for liquid organic hydrogen carrier (LOHC), it is necessary to develop efficient dehydrogenation catalysts of dodecahydro-N-ethylcarbazole (12H-NECZ) to overcome the challenges of low kinetics and selectivity. In this work, by the defect engineering strategy, a series of Pt-TiO 2 catalysts are synthesized via thermal reduction using titanium (Ti) as a reducing agent. The effects of various TiO 2 :Ti molar ratios (5:1 to 8:1), annealing temperatures (550–850 °C), and Pt loadings on the structural and catalytic properties are systematically investigated. It is indicated that the 2.5Pt-7:1–650 catalyst exhibits optimal dehydrogenation efficiency, achieving 100 % conversion, 99.03 % selectivity of NECZ, and hydrogen release capacity of 5.77 wt% under 453 K and 101.325 kPa for 7 h. Various structural characterizations from XRD, H 2 -TPR, ESR, and XPS analysis reveal that the oxygen vacancies and Ti 3+ species are generated induced by the metallic Ti reduction. The interaction between Pt and TiO 2 facilitates the electron transfer from TiO 2 to Pt, optimizes the electronic state of Pt and promotes the C-H bond cleavage of benzene ring in adsorbed 12-NECZ molecules. Furthermore, the kinetic analysis for a three-step reaction pathway confirms the dehydrogenation of 4H-NECZ to NECZ is the rate-limiting step. The stability measurements suggest that 2.5Pt-7:1–650 maintains the hydrogen release amount of 5.64 wt% after 20 cycles at 453 K, demonstrating the potential applications for the NECZ/12-NECZ system. This study provides a novel strategy for designing high-performance LOHC dehydrogenation catalysts through defect engineering.
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高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Jinlong Cui,Chengui Zhang,Yalong Li,Yang Liu,Weijun Jiang,Yuhui Wen,Zhenxi Wang,Zhonghua Yu,Xiangrong Ren,Zhifu Zhang
The selective hydrogenation of cinnamaldehyde (CAL) is a key reaction for producing valuable intermediates in pharmaceuticals, fragrances, and fine chemicals. However, achieving high selectivity toward the C=O bond reduction of CAL under mild conditions remains challenging. In this study, an efficient and sustainable photocatalytic strategy for the selective transfer hydrogenation of cinnamaldehyde to cinnamyl alcohol under mild conditions was reported. The low-loading 0.5 wt% Au/TiO 2 -CeO 2 and 0.5 wt% Pt/TiO 2 -CeO 2 catalysts were prepared by sol–gel and ultraviolet deposition method. Experimental results show that heterojunction is formed by doping CeO 2 with TiO 2 . The light absorption of materials is redshifted, and the separation of photogenerated electron-hole pairs is enhanced, thereby reducing the load usage of precious metal. The 0.5 wt% Au/TiO 2 -CeO 2 catalyst exhibits optimal performance under visible light irradiation, while the 0.5 wt% Pt/TiO 2 -CeO 2 catalyst exhibits excellent activity under ultraviolet light irradiation. The conversion efficiency in 0.5 wt% Au/TiO 2 -CeO 2 catalytic system under visible light is 97.23 %, and the selectivity can reach 96.91 %. Recycling tests verified the structural stability and reusability of the prepared catalysts. The formation of heterojunction structures can effectively reduce the load of precious metal while maintaining high conversion and selectivity. These findings provide a new pathway for achieving highly selective CAL hydrogenation under mild conditions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yizhi Ma,Yunxiang Yuan,Hongchao Zhang,Luning Sun,Sainan Wei
The development of electromagnetic wave-absorbing materials has attracted much attention in recent years, as the broad application of electronic devices in communication and military radar operations has brought about serious problems such as electromagnetic pollution and interference. In this study, a bimetallic MOF/MXene based electromagnetic nanocomposite CoNi@Ti 3 C 2 T x /CNT/TiO 2 (CNTCT) is developed. The composite system with multiple heterogeneous interfaces is successfully constructed by constructing a porous few-layer MXene substrate through the H 2 O 2 etching technique, combined with electrostatic self-assembly of CoNi-MOF-74 and a high-temperature annealing process. The porous MXene provides high surface area and defect sites, the CNT/TiO 2 hetero-interface generated by pyrolytic reduction effectively promotes the multi-polarization mechanism, and the magnetic CoNi component significantly enhances the magnetic loss performance through the natural/exchange resonance and eddy current loss to realize the high-performance broadband electromagnetic wave absorption. CNTCT-3 composites obtained −73.82 dB RL min at 9.74 GHz (matched thickness of 2.53 mm) and 3.79 GHz EAB; when the thickness was reduced to 1.93 mm, the EAB was expanded to 5.65 GHz. This work provides insights into potential applications of novel MXene-derived composites in electromagnetic wave absorption through dielectric-magnetic synergistic effects and structural modulation applications.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Zhenghao Li,Sheng Xu,Yihua Zhang,Lingli Liu,Jinlong Cui,Zhenxi Wang
To enhance the visible-light catalytic activity and broaden the light absorption range of TiO 2 , a series of three-dimensional hollow sea-urchin-like TiO 2 @CdS composite photocatalysts were synthesized via a one-step hydrothermal method. The microstructure and photoelectrochemical properties of the synthesized TiO 2 @CdS composites were systematically characterized by multiple techniques. The scanning electron microscopy results showed that the pure TiO 2 present the hollow sea-urchin-like structure and the overall morphology of the TiO 2 @CdS composite material is hardly changed. PL results showed that the introduction of CdS quantum dots to TiO 2 matrix to form a heterojunction can effectively improve its photoelectron transfer efficiency and enhance electron-hole separation. The UV–vis results indicated that the introduction of CdS QDs significantly enhanced the visible-light absorption of TiO 2 . The performance for the visible-light-driven degradation of tetracycline hydrochloride (TCH) was systematically investigated. The results showed that the TCH degradation efficiency reached 83.71 % within 1 h of visible-light irradiation and further improved to 93.59 % after 3 h. Moreover, the degradation rate was markedly accelerated under alkaline conditions and the degradation rate can reach 96.82 %. After five consecutive cycles, the TiO 2 @CdS composites exhibited negligible loss in photocatalytic activity, confirming their excellent visible-light catalytic degradation performance and outstanding reusability.
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高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Qianxilong Wang,Jiakuo Chen,Jiansheng Wang,Xiongfeng Zeng,Ruimin Wang,Yingna Zhao
Bimetallic metal–organic frameworks offer exceptional advantages, including high specific surface area, excellent chemical stability, and tunable bandgap characteristics. In this study, a novel bimetallic metal–organic framework/TiO 2 composite photoanode was successfully prepared via a hydrothermal method. The composite exhibited an open-circuit potential negatively shifted to −0.4 V and a photocurrent density of 16.3 μA·cm⁻². The photoanode demonstrated remarkable long-term cathodic protection, effectively safeguarding 304 stainless steel for 28 days in saline environments. By precisely tuning the molar ratio of the two metal centers, the band structure of the bimetallic metal–organic framework was systematically modulated. Notably, at a 1:1 metal ion ratio, the conduction band reached its most negative position, and the work function was minimized. Density-of-states calculations revealed that variations in metal atom proportions altered the electronic configuration, thereby influencing the band structure. Additionally, in situ illuminated XPS was employed to elucidate interfacial charge-transfer dynamics and the photoelectrochemical protection mechanism at the heterojunction interface.
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高影响因子
ACS Applied Nano Materials
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2025
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IF 5.5
Lejing Qin,Fangyu Gong,Zi Ma,Kai Li,Linzheng Ma,Wei Chen
Self-powered photoelectrochemical (PEC) sensing platforms, which integrate a photoanode with a sensing cathode, have emerged as transformative strategies for analyzing biological samples due to their robust photocurrent responses and outstanding anti-interference capabilities. Building on this concept, a self-powered PEC aptasensor was designed to achieve the highly accurate and selective detection of thrombin (TB). The photoanode was constructed by sequentially modifying a bare indium tin oxide (ITO) electrode with titanium dioxide (TiO2) powder, aqueous cadmium telluride quantum dots (CdTe QDs), and poly(3,4-ethylenedioxythiophene) (PEDOT), resulting in a cosensitized TiO2/CdTe/PEDOT structure. The sensing cathode was prepared by electrodepositing reduced graphene oxide (RGO) onto an ITO substrate, followed by the immobilization of a TB-specific aptamer on the ITO/RGO surface. This spatial separation of the photoanode and cathode offers two key advantages: enhanced photoresponse and stable photocurrent compared to traditional cathodic PEC systems, as well as excellent sensitivity and selectivity with strong resistance to interference from reductive species and photoexcitation of the cathode. This self-powered PEC aptasensor demonstrates a highly reliable and efficient platform for target analyte detection, showcasing a superior performance and significant potential for diverse applications in biomolecular sensing.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Zijian Wang,Yajing Chen,Jishun Guo,Dongzhi Zhang,Mingcong Tang,Yuehang Sun,Xingyan Shao
Hydrogen (H 2 ) is one of the most critical gases in transformer oil. In this paper, an H 2 sensor based on spindle-shaped multilateral CeO 2 rods in micron size and TiO 2 quantum dots (QDs) with an average size of 3.09 nm was designed. The sensor based on CeO 2 with 1 wt%TiO 2 has the best performance and is labeled as Ce–Ti1 sensor. The Ce–Ti1 sensor operates at 250 °C and has the better response value of 52.51% to H 2 of 1000 ppm. The response time is less than 1 s for 2000 ppm H 2 and the response time is 1 s. The Ce–Ti1 sensor has low response values for several dissolved gases in transformer oils (5.78 times than 1000 ppm C 2 H 6 , 9.28 times than 50 ppm CO, and 18.04 times than 1000 ppm CH 4 ). The response of the Ce–Ti1 sensor is affected by humidity, while it shows good long-term stability and repeatability. The response intensity can decrease by 50.21% in RH = 85% compared with sensing performance in RH = 33%. First-principle calculations are used to analyze the H 2 -sensing properties of TiO 2 , CeO 2 , and their composite heterostructures from a microscopic perspective. The adsorption mechanism between the Ce–Ti1 heterojunction and H 2 molecules is analyzed by the adsorbed oxygen mechanism. The construction of DFT calculations and H 2 -sensitive mechanism models can provide guidance for the subsequent construction of high-performance CeO 2 -based gas sensors.
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高影响因子
Nanotoxicology
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2016
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IF 7.913
Liwen Qiang,Xiaoyu Pan,Lingyan Zhu,Shuhong Fang,Shengyan Tian
Nano-titanium dioxide (nano-TiO2) is one of the most universal engineered nano-materials while perfluorooctanesulfonate (PFOS) is a typical new persistent organic pollutant. They are widely used and present in aquatic environment. In this study, a novel semi-static multilayer microcosm was setup to investigate the impacts of nano-TiO2 on PFOS bioaccumulation in fish species [Danio rerio (D. rerio), Ctenopharyngodon idella (C. idella), Hypostomus plecostomus (H. plecostomus)] living in different vertical layers. As a result of aggregation and deposition, the concentration of TiO2 increased from upper to bottom layers in the water column. Concomitantly, due to adsorption of PFOS on the nano-TiO2 particles, PFOS also displayed an increasing trend from upper to bottom layer. Owing to ingestion of the TiO2–PFOS complexes, more PFOS was taken-up by fish. With the aid of intestinal fluid, PFOS was readily released from TiO2 particles and absorbed by fish. As a result, accumulation of PFOS in whole fish was facilitated and the bioaccumulation factors of PFOS in D. rerio, C. idella and H. plecostomus were 3.01, 2.42 and 1.11 times of that in the groups without TiO2. However, TiO2 aggregates were too large to penetrate biological membranes to participate body circulation, and no significant accumulation of TiO2 was observed in fish muscle. The results suggested that the ecological risk of PFOS could be enhanced due to the presence of nano-TiO2 in water.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Yuanhui Gao,Weiran Hao,Guogang Xu,Chao Wang,Xinyue Gu,Peng Zhao
A gradient porous ceramic membrane with surface super-hydrophilic and underwater super-oleophobic performance was prepared by combining hydrogel directional freezing method and low temperature oxidation process . The effects of solid contents and sintering temperature on the ceramic membrane matrix were examined. The reaction time and synthesis temperature on the TiO 2 nanowire array were also evaluated. In addition, the related effects on pore size distribution , permeation flux, contact angle, and oil-in-water emulsion separation were systematically investigated. The ceramic membrane matrix pore size changed from 0.5 μm to 25 μm gradually, indicating the gradient structure controlled by the growth of ice. The super-hydrophilic and underwater super-oleophobic performance of ceramic membrane surface was obtained with surface modification by TiO 2 nanowire array, and the surface water contact angle and underwater oil contact angle were less than 5° and over 158°, respectively. The bonding strength between TiO 2 nanowire and ceramic membrane matrix was high enough to withstand ultrasonic waves. The ceramic membrane modified with TiO 2 nanowire array was used for 1000 ppm diesel oil-in-water emulsion separation, and the stable separation efficiency and flux were about 97% and 100–200 L/(m 2 h bar) even after 10 filtration cycles.
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高影响因子
JOURNAL OF POWER SOURCES
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2019
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IF 7.467
Yuqing Xiao,Changlei Wang,Kiran Kumar Kondamareddy,Pei Liu,Fei Qi,Huijie Zhang,Shishang Guo,Xing-Zhong Zhao
Surface passivation of the electron transport layer in perovskite solar cells has been proven to be one crucial strategy to improve the power conversion efficiency . In this study, we introduce rutile phase titania shell to passivate anatase TiO 2 scaffold, forming anatase@rutile mixed-phase TiO 2 scaffold in hole-conductor-free carbon based perovskite solar cells . Anatase@rutile mixed phase TiO 2 films exhibit higher conductivity, faster charge extraction, lower trap density and suppressed charge recombination at the interface of TiO 2 /perovskite films in the modified devices as well, achieving a champion power conversion efficiency of 15.21% for carbon based perovskite solar cells . More importantly, benefiting from the stable and better ultraviolet light filtration properties of rutile phase TiO 2 , our devices exhibit excellent stability maintaining 92% of their initial efficiency after 200 days storage in ambient air, highlighting their merits as a potential competitor for future industrial photovoltaics .
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
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IF 3.995
Li Huang,Yiqing Zeng,Yibo Gao,Hu Wang,Yuhao Zong,Zhengfeng Chang,Shule Zhang,Pei Han,Yang Yu
The oxidation of SO 2 into SO 3 promote the formation of NH 4 HSO 4 (ABS), which can cover surface active sites catalyst, and then leading to the decrease of NH 3 -SCR De-NO x activity. In this work, phosphorus species were loaded on the V 2 O 5 -MoO 3 /TiO 2 De-NO x catalyst to enhance its SO 2 resistance via inhibiting the SO 2 /SO 3 conversion. XRD and N 2 -adsorption results showed that phosphorus has little impact on the structure and pore property of the catalyst. The results of XPS , H 2 -TPR, and NH 3 -TPD analyses illustrated that suitable amount of phosphorus (1%) increases the content of polymeric vanadate and chemisorbed oxygen (O α ) of the catalyst, which is benefit to the SCR process. Phosphorus species decreases the SO 2 absorbability and SO 2 oxidation activity of V-Mo-P/Ti catalysts, thus it exhibits higher NH 3 -SCR activity than that of the P-free catalyst at presence of SO 2 due to the lower SO 2 /SO 3 conversion and fewer amount of NH 4 HSO 4 deposition.
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高影响因子
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