CATALYSIS LETTERS
·
2019
·Vol. 150
·期 2
·375-383
·
IF 2.372
Liu Xiaolong,Zhao Ziwei,Ning Ruliang,Qin Yu,Zhu Tingyu,Liu Fagao
The promoting effect of Ce on V-W/Ti catalyst for selective catalytic reduction (SCR) of NO x by NH 3 was studied. Compared with the original V-W/Ti samples, addition of Ce contributed better NH 3 -SCR performance. The H 2 O and SO 2 resistance of Ce modified V-W/Ti catalyst was improved by the different impregnation sequence of Ce. The catalysts were characterized by NH 3 -temperature programmed desorption (NH 3 -TPD), X-ray photoelectron spectroscopy (XPS), and H 2 -temperature programmed reduction (H 2 -TPR) techniques. The results showed that the impregnation sequence of W and Ce influenced the NH 3 adsorption capacity of the catalysts. In comparison to 0.2V-5Ce-5W/Ti and 0.2V-(5Ce5W)/Ti, 0.2V-5W-5Ce/Ti catalyst contributed better H 2 O and SO 2 resistance, with the highest Ce 3+ /(Ce 4+ + Ce 3+ ) value of 36.6%. Besides, a catalytic mechanism of SCR reactions over Ce-doped V-W/Ti catalysts was proposed. Graphic
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高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Fanli Meng,Yi Luo,Yali Zhou,Jinwen Zhang,Yanzhen Zheng,Guozhong Cao,Xia Tao
A plasmon-enhanced upconversion composite Y 2 O 3 :Er/Au@TiO 2 (SYE/A@T) with a three-dimensional starlike morphology is prepared and then mixed with submicron TiO 2 (200 nm) to form a multifunctional scattering layer in TiO 2 -based dye-sensitized solar cells (DSSCs). In such starlike micronsized upconverter, Au nanoparticle-assisted plasmon effect can intensify the upconversion emission of Y 2 O 3 :Er, and simultaneously TiO 2 coating can improve the charge transport within SYE/A@T. Therefore, the SYE/A@T shows extended light-absorbing range to near-infrared region and improved light-scattering ability, leading to an improved photovoltaic performance of DSSCs. With the optimum mixing ratio, a conversion efficiency of 8.62% is attained, which is a significant improvement of 27.6% compared with the cell without adding SYE/A@T. Our work provides a feasible strategy to prepare an upconversion composite with plasmon-enhanced emission and enable this composite to accommodate the DSSCs system and improve the conversion efficiency of DSSCs.
研究领域:
材料科学
·
光伏技术
·
纳米光学
·
能源材料
·
表面等离激元
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Hao Sun,Danyan Xie,Zhen Song,Chuanhui Liang,Lingbo Xu,Xianlin Qu,Yuxin Yao,Deng Li,Hang Zhai,Kun Zheng,Can Cui,Yiying Zhao
Numerous trap states and low conductivity of compact TiO2 layers are major obstacles for achieving high power conversion efficiency and high-stability perovskite solar cells. Here we report an effective Na2S-doped TiO2 layer, which can improve the conductivity of TiO2 layers, the contact of the TiO2/perovskite interface, and the crystallinity of perovskite layers. Comprehensive investigations demonstrate that Na cations increase the conductivity of TiO2 layers while S anions change the wettability of TiO2 layers, thus improving the crystallinity of perovskite layers and passivate defects at the TiO2/PVK interface. The synergetic effects of dopants lead to a champion efficiency as high as 21.25% in unencapsulated perovskite solar cells (PSCs), with much-improved stability. Our work provides new insights on anion dopants in TiO2 layers, which is usually neglected in previous reports, and also proposes a simple approach to produce low-cost and high-performance electron transport layers for high-performance PSCs.
研究领域:
光伏学
·
材料科学
·
纳米技术
·
能源材料
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高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Qingmiao Zhang,Hangcheng Yang,Binglin Zhang,Junyao Chang,Xiaozhong Du,Zishang Wang,Guiyin Xu,Lingjie Meng,Yu Chen,Hongkang Wang
Heteroatom doping and carbon coating are essential techniques for improving the conductivity and reaction kinetics of intercalation-type anode materials in lithium-ion batteries. However, it is difficult to achieve heteroatom doping and carbon coating at the same time through simple processes. Here, we propose a simple method to simultaneously achieve carbon-coating and P/S/N triple-doping by introducing polyphosphazene (PZS) as precursor. We first prepare PZS-coated titanium-based metal-organic frameworks (MIL-125), which can be readily converted into phosphorus/sulfur/nitrogen (P/S/N) co-doped carbon-coated titanium dioxide (TiO 2 ) nanocomposites (PSN-C@TiO 2 @C) by simple calcination under an inert atmosphere. The heteroatom doping and carbon hybridization synergistically enhance the conductivity and ion diffusion of the PSN-C@TiO 2 @C, which not only change the local charge density of the nanocomposite, but also generate more active sites. Benefiting from the above advantages, the well-designed PSN-C@TiO 2 @C anode exhibits significantly improved specific capacity and rate performance, maintaining high reversible specific capacities of 272.2 mA h g −1 after 1000 cycles at 1000 mA g −1 and 141.1 mA h g −1 after 2000 cycles at 5000 mA g −1 . This study presents a novel simplified method for multi-element-doping and carbon-coating, which can be generally applied for developing advanced electrode materials for energy storage application.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jiajia Liu,Shijie Chen,Wenjing Xiang,Chang Liu
Grain boundaries and intrinsic defects in polycrystalline TiO 2 thin films prepared via traditional sol–gel methods severely compromise their carrier transport and optoelectronic efficiency. Addressing this bottleneck, this study proposes a biomimetic “oligomer cross-linking strategy” utilizing triethylamine (TEA) to effectively modulate the sol–gel transition process. Unlike the granular stacking observed in acetic acid-mediated systems, this process engineers a continuous, dense anatase quasi-single crystal (QSC) structure with high (001) orientation on glass substrates. This structural continuity pushes optical properties toward theoretical limits, yielding a refractive index of 2.4987 at 1000 nm and visible transmittance of 95.5%. Crucially, in photoelectrochemical (PEC) applications, the QSC film delivers a photocurrent density of 1.51 mA/cm 2 , doubling that of polycrystalline controls. Furthermore, the optimized film achieves a superior Applied Bias Photon-to-Current Efficiency (ABPE) of 0.87%. Kinetic analysis via Electrochemical Impedance Spectroscopy (EIS) reveals that the QSC structure reduces the interfacial charge transfer resistance ( R CT ) by approximately 50% (768.6 Ω vs. 1434.0 Ω). These results demonstrate that the elimination of grain boundary barriers significantly accelerates hole injection and carrier separation. This work offers a scalable process engineering paradigm for fabricating high-performance oxide films by bridging precursor molecular design with macroscopic film quality.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Shiwei Ge,Qian Zhao,Weijian Du,Weikun Jiang,Yu Liu
A TiO 2 -TiS 2 heterostructure decorated on S, O-MXene was successfully constructed. • TiO 2 -TiS 2 heterostructure mitigates MXene stacking and facilitates Li + diffusion. • The design of TiO 2 /TiS 2 ratio can balance the adsorption-catalysis trade-off. • S, O functional groups on MXene offer additional anchoring and catalytic sites. • The SM-TT interlayer enhances the cycle and rate performance of Li-S batteries. The practical application of lithium-sulfur (Li-S) batteries is impeded by polysulfides shuttling and sluggish sulfur redox kinetics. Although Ti 3 C 2 T x MXene has demonstrated great potential for polysulfides adsorption and conversion, its restacking tendency significantly diminishes its practical effectiveness. To address this critical issue, we designed and fabricated a TiO 2 -TiS 2 heterostructure decorated on sulfur and oxygen-functionalized MXene (SM-TT) through a controlled sulfurization strategy. This well-engineered architecture not only suppresses MXene restacking but also constructs abundant heterointerfaces that synergistically facilitate electron and Li + transport. Moreover, the rationally designed TiO 2 /TiS 2 ratio can well balance the adsorption-catalysis trade-off of polysulfides. Additionally, the sulfur and oxygen functional groups on MXene surface provide additional active sites for polysulfides anchoring and catalytic conversion. When employed as multifunctional interlayer in Li-S batteries, the SM-TT interlayer enables the cell to deliver a high initial capacity of 1292.8 mAh g −1 at 0.1C, maintain 768.6 mAh g −1 after 100 cycles, and exhibit 604.7 mAh g −1 at 1 C. Even under 5 mg cm −2 high sulfur loading, the cell still retains stable capacity of 722.7 mAh g −1 after 100 cycles. This work demonstrates an effective heterointerface engineering strategy for developing high-performance Li-S batteries. Download: Download high-res image (163KB) Download: Download full-size image
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OPTICAL MATERIALS
·
2026
·
IF 4.3
Yunqing Lu,Yu Feng,Mengmeng Li,Ji Xu,Jin Wang
The photocatalytic conversion of CO 2 into solar fuels presents a sustainable approach to alleviate climate change and address energy crisis. To address the limitations of conventional photocatalysts, such as their restricted visible-light response and rapid charge recombination, we have developed a ternary nanocomposite consisting of zeolitic imidazolate framework-8 (ZIF-8), plasmonic gold nanoparticles (Au NPs), and titanium dioxide (TiO 2 ). In this system, ZIF-8 provides high-density CO 2 adsorption sites, enhancing the local concentration of CO 2 and facilitating its subsequent reduction. The incorporation of Au NPs induces a strong localized surface plasmon resonance (LSPR) effect, significantly broadening the visible-light harvesting capability of the composite and promoting efficient charge transfer between TiO 2 and ZIF-8. TiO 2 serves as a stable photocatalytic platform, enabling effective charge separation and transfer. Comprehensive characterization verifies the uniform integration of the three components and the formation of close interfacial contacts. The ternary nanocomposite demonstrates significantly improved visible-light absorption, reduced charge recombination, and enhanced photogenerated carrier separation and transfer, as supported by UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and photocurrent measurements. Under simulated sunlight, the ZIF-8/Au/TiO 2 photocatalyst achieves CO 2 -to-fuel conversion rates of 1.56 μmol g −1 h −1 for methane (CH 4 ) and 4.65 μmol g −1 h −1 for carbon monoxide (CO). This enhancement is attributed to the synergistic effects of plasmonic sensitization by Au nanoparticles and CO 2 adsorption enrichment by ZIF-8, which collectively enhance photon utilization, reactant concentration, and interfacial charge transfer dynamics.
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ACS Sensors
·
2026
·
IF 10.9
Peng Xu,Yanlei Guo,Xin Lv,Shuting Wei,Dan Yang,Renquan Guan,Yuxin Wang,Yingmin Teng,Aiceng Li,Huaqiao Tan,Zhongling Lang,Zheng Lou,Lili Wang,Zhao Zhao
The necessity for high-efficiency, low-power room-temperature (RT) ammonia (NH3) sensors is particularly acute in environmental monitoring, industrial safety, and medical diagnostics. However, conventional chemiresistive sensors frequently require elevated temperatures to initiate reactions, leading to high energy consumption and potential safety risks. Inspired by plant photosynthesis, this paper successfully designs a ternary S-scheme heterojunction for a photo-activated RT NH3 sensor. The design effectively mimics the efficient charge transfer process in photosynthesis, thereby significantly promoting the separation and migration of photogenerated carriers and enhancing the sensing performance. Experimental results demonstrate exceptional performance under illumination: a high response value of 1679% (representing a 20-fold improvement over the dark state), rapid response and recovery times of 2.1 s and 1.9 s, respectively, along with outstanding selectivity, excellent stability, and a detection limit as low as 17 ppb. This work demonstrates a novel, efficient RT photo-activated NH3 sensor and provides innovative insights into designing biomimetic, smart gas-sensing materials and devices.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124924
·
IF 7.5
Jing Yao,Liuqing Li,Tiefeng Xu,Wangyang Lu
As a renewable platform chemical, 2, 5-furandicarboxylic acid (FDCA) provides a sustainable alternative to petroleum-derived terephthalic acid with vital strategic importance. Achieving the efficient conversion of 5-hydroxymethylfurfural (HMF) to FDCA under environmentally friendly conditions is of great practical significance. Herein, an Au/Fe 3 O 4 /TiO 2 photocatalyst was prepared by first synthesising an Fe 3 O 4 /TiO 2 composite via a hydrothermal method, followed by amination and subsequent reduction of Au nanoparticles. Furthermore, multiple characterisations confirmed the successful loading of Fe 3 O 4 and Au nanoparticles, while abundant Fe signals were detected adjacent to the Au nanoparticles. Under simulated solar irradiation, an FDCA yield of 97% was achieved within 15 h, demonstrating the superior catalytic performance of the Au/Fe 3 O 4 /TiO 2 photocatalyst. Moreover, the photocatalytic activity remained at 85% after five consecutive cycles, indicating its excellent cycling stability and reusability. Simultaneously, superior photocatalytic activity and stability were attained owing to the strong synergistic effect among Au nanoparticles, Fe 3 O 4 and TiO 2 . In addition, the photocatalytic oxidation mechanism of HMF to FDCA over Au/Fe 3 O 4 /TiO 2 was elucidated, wherein h + , 1 O 2 and •O 2 - contributed to the production of FDCA. This study provides a promising strategy for the efficient photocatalytic conversion of HMF to FDCA under mild conditions.
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高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2026
·
IF 2.5
Yagang Li,Shuyan Huo,Yunhui Xing,Yonghang He,Wei Wu,Min Huang,Yiming Jiang,Guoping Zhong,Weiwei Zeng
Novel TiO 2 @MWCNTs composites were designed and synthesized, which exhibit potential as purification materials for phospholipid removal from rat plasma samples. • A dispersive solid-phase extraction method based on TiO 2 @MWCNTs showed the capacity to mitigate matrix effects in rat plasma samples for small-molecule analytes with low lg P . • An LC–MS/MS method was established and validated for quantifying representative drugs using TiO 2 @MWCNTs and applied to a pharmacokinetic study of metformin. The matrix effect is a prevalent interference in LC–MS/MS bioanalysis of small-molecule drugs, with lipids as a major source of such interference in plasma matrices. Leveraging the lipid-adsorbing capability of multi-walled carbon nanotubes (MWCNTs), this study synthesized TiO 2 @MWCNTs composites and developed a novel dispersive solid-phase extraction (d-SPE) method to reduce matrix effects in rat plasma. Lipid profiles were compared to characterize the lipid purification capacity of TiO 2 @MWCNTs in rat plasma samples. The matrix effects of representative small-molecule drugs, including metformin, amisulpride, and aripiprazole, were compared across TiO 2 @MWCNTs-based d-SPE, protein precipitation, and traditional solid-phase extraction. Method validation and sample determination were subsequently performed. The results demonstrated that TiO 2 could be successfully loaded onto MWCNTs. The responses of 72 differential lipid ions were significantly reduced by at least 2-fold after TiO 2 @MWCNTs treatment, and the IS-normalized matrix factors for metformin (from 13.69 to 20.00% to 31.49–44.39%) and amisulpride (from 71.01 to 84.82% to 91.69–101.48%) as well as accuracy for aripiprazole at low concentration were significantly improved compared with protein precipitation treatment. Method validation results confirmed excellent selectivity, accuracy, precision, and reproducibility. The validated method was also successfully applied to a pharmacokinetic study of metformin with pharmacokinetic parameters comparable to those reported previously. This study shows that the dispersive solid-phase extraction method based on TiO 2 @MWCNTs could act as a simple, rapid, low-cost and reliable pretreatment strategy to mitigate matrix effects for small-molecule analytes with low lg P in rat plasma as a proof-of-concept attempt.
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高影响因子
ACS Omega
·
2025
·
IF 4.3
Yoshiaki Nomura,Manabu Kiguchi,Zhongoing Liang,Mei Ma,Akira Fujishima,Nobuhiro Hanada
The triazine herbicides simetryn and prometryn may cause damage to nontarget crops due to persistent contamination of agricultural water. Photocatalysis is a promising technology for the degradation of agricultural pollutants. This study provides the first systematic integration of photocatalytic herbicide degradation with live plant bioassay validation using cost-effective Fe3O4/SiO2/TiO2 magnetic photocatalysts synthesized by a simple coprecipitation method suitable for large-scale production. The phytotoxicity of herbicide-containing water was evaluated using pak choi, a crop sensitive to triazines. Both herbicides were completely decomposed in water within 240 min after UV irradiation, and their phytotoxicity also disappeared. In the plant toxicity evaluation, prometryn exhibited temporary high toxicity exceeding that of the untreated 10 ppm solution during the photodegradation process. In previous photocatalyst studies, evaluations relied on either chemical analysis or biological tests. In this study, we developed a new rapid toxicity screening technique using plant seedlings and established a safety evaluation protocol integrating chemical analysis and plant toxicity tests. This method represents the first approach to comprehensively evaluate the safety of agricultural water.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2014
·Vol. 40
·期 9
·15199-15206
·
IF 2.086
Yanbo Yang,Xiao Peng,Si Chen,Liping Lin,Bao Zhang,Yaqing Feng
The novel hierarchical compact layer involving ZnO and TiO 2 blocking films is used to improve the overall performance of dye-sensitized solar cells. The ZnO compact films are fabricated as a bottom layer to block the electrons injection to the conductive glass and improve the open-circuit voltage. The TiO 2 compact layer is employed to suppress back electron transfer and avoid ZnO contacting the acid dyes directly. The short-circuit current density of the DSSC containing the hierarchical compact layer is improved by 30% compared to that of one with only ZnO as the compact layer. The open-circuit voltage is increased by 4% after introducing the additional TiO 2 blocking layer between the ZnO compact layer and mesoporous TiO 2 layer. Overall, the short-circuit current density, open-circuit voltage and solar energy conversion efficiency are enhanced by 15.3%, 3.7% and 29.6%, respectively, relative to the traditional DSSC without any blocking layers. The ZnO–TiO 2 blocking layer has been characterized by electrochemical impedance spectroscopy , open-circuit voltage decay and dark current measurement to reveal the mechanism of short-circuit current density and open-circuit voltage improvement.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏技术
·
表面科学
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高影响因子
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