ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xiaopeng Bai,Ke An,Lingyu Jia,Yanzhen Guo,Jingtian Hu,Guangri Jia,Ruibin Jiang,Jianfang Wang,Jimmy C. Yu
Titanium nitride has garnered much attention owing to its high charge carrier density and low work function. These merits compensate for the shortcomings of traditional photocatalysts. Herein we report on the synthesis of TiN/TiO2 nanoparticles (NPs) as a new Schottky-barrier-free plasmonic photocatalyst (SBFPP) through the oxidation of commercially available TiN NPs. Our SBFPP possesses abundant oxygen vacancies (OVs) and the ability to generate hot charge carriers. The TiN NPs oxidized at 400 °C for 2 h, which is designated as TiN-2, exhibit broad light absorption and a high OV concentration. Theoretical calculations have revealed that the presence of OVs and nitrogen dopants leads to the formation of defect electronic states in TiO2. Hot electrons from TiN can efficiently migrate to these defect states, hindering the rapid electron–hole recombination. Besides the efficient photocatalytic nitrogen fixation, the TiN-2 NPs also exhibit excellent hydrogen generation performance. Furthermore, the photocatalytic film formed by combining the TiN/TiO2 NPs and a porous poly(vinyl alcohol) film dramatically improves the photocatalytic nitrogen fixation performance, giving an enhancement of ∼4.4 times in comparison with the TiN-2 NPs. This study unveils a promising avenue for the rational design of plasmonic photocatalysts and facilitates the development of practical applications in the field of photocatalysis.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenjie Guo,Yinghua Lan,Jien Niu,Wenwen Chen,Yanhui Zhang,Guoping Li,Juan Xu
A series of TiO 2 -CdS composites were prepared at room temperature using a one-step precipitation method, and an appropriate loading ratio was determined. Compared with pure TiO 2 and CdS, the composites exhibited superior photocatalytic degradation performance in the degradation of ciprofloxacin (CIP) and the reduction of Cr(Ⅵ). The incorporation of an appropriate amount of TiO 2 effectively suppressed the agglomeration of CdS nanoparticles and enhanced interfacial electron transfer, thereby significantly improving photocatalytic efficiency. Furthermore, a metal ion-mediated redox synergistic system was successfully constructed, achieving efficiency breakthroughs in the degradation of bisphenol A (BPA) and ibuprofen (IBU), which exhibited negligible photocatalytic activity under conventional conditions. The influence of different heavy metal ions on the photocatalytic degradation performance of organic pollutants were discussed. This provides a robust theoretical basis for the removal and resource recovery of refractory organic compounds.
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高影响因子
Materials
·
2025
·Vol. 18
·期 11
·2623
·
IF 3.2
Jiayi Zhang,Chen Wang,Xiaoguo Shi,Qing Feng,Tingting Shen
Nano-titanium dioxide (TiO 2 ) is currently the most widely studied photocatalyst. However, its rapid recombination of photogenerated carriers and narrow range of light absorption have limited its development. Crystal form regulation and polymer modification are important means for improving the photocatalytic activity of single-phase materials. In this paper, TiO 2 materials of different crystal forms were prepared by changing the synthesis conditions, and they were compounded with trimesoyl chloride–melamine polymers (TMPs) by the hydrothermal synthesis method. Then, their photocatalytic performance was evaluated by degrading methylene blue (MB) under visible light. The mechanisms of influence of TiO 2 crystal form on the photocatalytic activity of TiO 2 -TMP were explored by combining characterization and theoretical calculation. The results showed that the TiO 2 crystal form, through interface interaction, the built-in electric field intensity of the heterojunction, and active sites, affected the interface charge separation and transfer, thereby influencing the photocatalytic activity of TiO 2 -TMP. In the 4T-TMP photocatalytic system, the degradation rate of MB was the highest. These studies provide theoretical support for understanding the structure–property relationship of the interfacial electronic coupling between TiO 2 crystal forms and TMP, as well as for developing more efficient catalysts for pollutant degradation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Dexin Jin,Changhua Wang,Yinhe Rong,He Ma,Yingying Li,Xintong Zhang
Photo-plasma catalysis, combining the controllability of photocatalysis with the high reactivity of plasma, presents a promising platform for reactive oxygen species (ROSs) generation. However, efficient coupling of photocatalysis and plasma requires interfaces that integrate multiple catalytic functions to reconcile differences between the two processes. Herein, we report the tuning of the TiO 2 /Co 3 O 4 nano-interface for efficient photo-plasma catalytic ROS generation by loading a Co 3 O 4 nanozyme onto a surface-disordered TiO 2 photocatalyst. For bisphenol A (BPA) removal, the composite catalyst achieves a degradation rate that is 17.3-fold and 12.6-fold higher than those of plasma and photocatalysis alone, respectively. Combined ROS scavenging and probe analyses reveal that the enhanced bisphenol A removal is directly related to the efficient singlet oxygen ( 1 O 2 ). Further mechanistic analyses suggest that the yield of 1 O 2 is linked to the conversion of superoxide radicals (•O 2 − ). The heterogeneous nano-interface serves as the key reaction center. Specifically, surface disorder and heterojunction-driven electron accumulation promote •O 2 − generation via photocatalytic O 2 reduction on TiO 2 , while holes in Co 3 O 4 oxidize plasma-generated H 2 O 2 to •O 2 − through a sustained Co 3+ /Co 2+ redox cycle. Compared with TiO 2 /Fe 2 O 3 and TiO 2 /CuO, TiO 2 /Co 3 O 4 exhibits superior photo-plasma catalytic performance due to the more efficient conversion between H 2 O 2 and •O 2 − enabled by the stable Co 3+ /Co 2+ redox cycle. This work provides a general paradigm for developing interfacial reaction centers in catalysts to improve coupled catalytic ROS generation.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuqian Ma,Yang Li,Yaling Zeng,Yunxiao Wen,Xiaofei Li,Zhendong Ouyang,Guanghua Cai,Jian Yang,Ximei Fan
The efficiency of transition metal catalysts for ammonia borane (AB) hydrolysis is frequently constrained by the kinetic barriers of water activation and strong intermediate binding. In this study, surface-confined P-doped TiO 2 catalysts loaded with CoCu alloy were synthesized via an in-situ chemical reduction strategy. The resulting Co 3 Cu/0.1P-TiO 2 -85 catalyst delivers a competitive turnover frequency (TOF) of 47.27 min -1 at 25 ℃ and a low activation energy of 38.65 kJ mol -1 , surpassing most existing counterparts. Characterization results confirm the formation of CoCu alloys and the TiO 2 support significantly improves cyclic stability, while P-doping modifies the surface electronic structure to enhance water adsorption. Theoretical calculations further identify that the synergistic metal-support interactions between the P-doped TiO 2 and the alloy modulate the d-band center of the catalyst to an optimized level of -2.07 eV. This electronic reconfiguration concurrently enhances water adsorption capacity while mitigating the strong binding of AB, thereby significantly boosting the hydrolytic dehydrogenation performance. This work provides new ideas and insights for enhancing the hydrogen evolution performance of transition metal catalysts in the aqueous decomposition of AB.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiawen Hu,Jieling Liu,Ying Zhang,Xian Wang,Tao Wang,Rongzhou Gong,Yan Nie
Porous carbon materials demonstrate significant potential in electromagnetic wave absorption (EMWA). However, precisely tailoring their composition and microstructure remains a major challenge in developing high-performance electromagnetic wave absorbers. Here, a core-shell Fe-NC@TiO 2 nanocomposite with a dielectric gradient structure is presented, designed to effectively regulate dielectric properties and enhance electromagnetic wave absorption. A combined strategy of hydrothermal synthesis and chemical deposition was developed to achieve the in-situ coating of TiO 2 onto MOFs. Subsequently, a pyrolysis strategy was employed to construct core-shell Fe-NC@TiO 2 nanocomposites. Pyrolysis temperature was used to achieve tunable TiO 2 crystallization while maintaining core-shell architecture. The results indicate that the pyrolysis at 800 °C induces a phase transformation of TiO 2 shell from anatase to rutile, resulting in a high dielectric constant. The core-shell structure effectively optimizes the dielectric dispersion characteristics and impedance matching while improving attenuation performance. The Fe-NC@TiO 2 –800 nanocomposites achieved an effective absorption bandwidth (EAB) of 4.93 GHz at 1.47 mm thickness with 30 wt% filler loading, while simultaneously obtained a remarkable minimum reflection loss ( RL min ) of −50.51 dB at 2.05 mm. This work offers novel insights into the structural design of core-shell nanocomposites with tunable electromagnetic properties and has a broad application prospect in the field of EMWA.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Lin Wang,Maolin Sha,Jun Zhou,Xin Wei,Chentai Cao,Zishuai Cheng,Hai Yu,Jianguo Lv
The addition of B enhances the built-in electric field in the heterojunction. • The heterojunction could effectively degrade NOR over different environmental parameters. • The possible photocatalytic degradation pathway of NOR was investigated. • S-scheme charge transfer mechanism in heterojunction was proposed Antibiotic residues in natural water have posed great risks to ecological safety and public health. There, B-doped g-C 3 N 4 /TiO 2 (BCN/TNS) S-scheme heterojunctions were constructed through self-deposition. The optimized 0.7BCN/TNS heterojunction exhibited superior photocatalytic activity and degraded 94.8% norfloxacin (NOR) within 90 min, the rate constant was 2.06-fold and 1.46 folds than that of TiO 2 nanosheet array (TNS) and g-C 3 N 4 /TiO 2 (CN/TNS). The as-prepared also displayed high stability and strong adaptability over different environmental parameters. Radical trapping experiments and ESR measurements verified that ·O 2 - was the dominant active species during NOR degradation. Photoelectrochemical measurements and theoretical calculations indicate that the introduction of B not only increases the number of active sites and broadens the spectral absorption range, but also enhances the strength of the internal electric field (IEF), promoting charge transfer at the heterointerface. This paper supports a feasible strategy for designing a superior B-doped g-C 3 N 4 -based heterojunction for antibiotic wastewater treatment. Download: Download high-res image (192KB) Download: Download full-size image B-doped g-C 3 N 4 /TiO 2 S-scheme heterojunctions for efficient norfloxacin removal.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Yaofei Lin,Guangheng Wang,Xingxing Meng,Jiahuan Zhao,Hongju Wu,Wenying Zhou
Against the backdrop of the booming sophisticated electronics industry, polymer composites integrating superior dielectric permittivity ( ε ), low loss (tan δ ) and excellent breakdown strength ( E b ) have become a persistent pursuit in the research community. To simultaneously bolster the ε and E b in alumina (Al)/polyvinylidene fluoride (PVDF), in this study the neat Al particles were first surface-oxidized to thicken the alumina (Al 2 O 3 ) thickness and then encapsulated with a titanium dioxide (TiO 2 ) layer, followed by an investigation into the dielectric properties of the resulting Al@Al 2 O 3 @TiO 2 /PVDF composites. The results indicate that the Al@Al 2 O 3 @TiO 2 /PVDF exhibits a higher ε and E b but lower tan δ relative to pristine Al/PVDF. The elevated ε stems from the synergistic regulation of high-frequency fast intra-particle and low-frequency slow inter-particle polarizations in Al@Al 2 O 3 @TiO 2 /PVDF. The Al 2 O 3 @TiO 2 double-shell not only prevents direct contact between conductive Al but also induces deep traps immobilizing charges and lifts the energy barrier for captured charges de-trapping, thus restraining the tan δ and leakage current. Moreover, the double-shell effectively strengthens interfacial interactions and alleviates strong dielectric mismatch between the two components, leading to much reduced electric tree growth and improved E b . Theoretical simulation further reveals a profound understanding of the inherent multiple polarization mechanisms and the charge migration modulation induced by the double-shell structure. So, this work provides unique insights for realizing simultaneously high ε , superior E b and minimal tan δ via core@double-shell structure in percolating composites, which cannot be achieved in traditional composites, offering considerable application potential in power equipment and electric devices.
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高影响因子
Science China-Materials
·
2016
·Vol. 59
·期 9
·710-718
·
IF 0
Guo Lixue,Fei Chengbin,Zhang Rong,Li Bo,Shen Ting,Tian Jianjun,Cao Guozhong
Perovskite solar cells are known to have a power conversion efficiency dependent on subtle variation in chemical composition and crystal and microstructures of materials, processing conditions, and device fabrication procedures and conditions. The present work demonstrates such strong dependence of power conversion efficiency on a TiO 2 film made of the same sol with various aging time. A dense and conformal TiO 2 film was prepared by sol-gel method, and the influences of its surface morphology and thickness on performance of perovskite solar cells have been investigated. The surface morphology and thickness of the TiO 2 film were tuned by adjusting the aging time of sol, resulting in enhanced short-circuit current density and fill factor of the perovskite solar cells due to increased coverage and roughness of perovskite films, light refraction, and effective charge recombination blocking effect, which were verified by means of the light absorption spectra, photoluminescence of perovskite films with and without hole transport layer, cyclic voltammogram, and electrochemical impedance spectra. The cells with a dense and conformal TiO 2 compact layer derived fromthe sol aged for 4 h exhibit a power conversion efficiency of 15.7%, 50% higher than the efficiency based on TiO 2 layer derived from 0 h aging sol and 3 times of the efficiency with TiO 2 layer made from 8 h aged sol.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
太阳能
·
薄膜技术
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APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Chenghao Yao,Jinbiao Huang,Can Yang,Weiwei Deng,Lei Li,Zhan Lin
Photo-thermal catalysis which interplay the heat and light-induced effects have drawn broad attention owing to their synergistic effect to extend the capability of chemical transformation. Here, the effect of heat and/or light on methanol decomposition has been clarified. On Pt/TiO 2 , light irradiation activates the TiO 2 and enhance the absorption and the oxidation of intermediates. The main intermediate under PTC condition is formaldehyde, which is the same to TC condition rather than methyl formate under PC condition. Differences CO absorption site correlates with the key intermediates under PC and TC/PTC conditions. Light and heat display their strengths in a synergistic manner, optimizing the activity to promote efficient catalytic processes which is verified to be photo-assisted thermal catalysis. This work offers detailed mechanistic understanding of the surface species and paves the way for an educated microkinetic modeling approach under photo and/or thermal condition over oxide-supported metal catalysts.
研究领域:
催化化学
·
材料科学
·
物理化学
·
表面科学
·
能量转换
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Haoran Li,Yurong He,Xinzhi Wang,Dan Liu,Ziyu Liu
The improvement of the power-conversion efficiency of dye-sensitized solar cells (DSCs) has slowed down in recent years due to limited light absorption of the dyes in the near-infrared region. In this study, we present a novel strategy that uses ultra-broadband core–shell Ag@TiO 2 nanoparticles and mesoporous TiO 2 particles to improve light absorption and reduce charge recombination in DSCs. The effect of the concentration of nanoparticles on both photovoltaic performance and charge recombination is studied. The results show that Ag@TiO 2 nanoparticles can significantly improve the short-circuit current of DSCs and reduce the charge-transfer resistance at the TiO 2 -dye/electrolyte interface. These are key factors to achieve high power-conversion efficiency. A power-conversion efficiency of 8.34% is achieved by integrating core–shell NPs (0.6 wt%) with pure P25 TiO 2 particles. This efficiency can be improved further (to 10.02%) by depositing a layer of mesoporous TiO 2 particles, which increases the propagation distance of incoming light. The good interconnection between the TiO 2 crystals of mesoporous particles and the faceted nanocrystal surface enhance electron transport . This work shows a new route to speed-up the transfer of photo-generated carriers, and to split electron-hole pairs more efficiently.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能量转换
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高影响因子
APPLIED ENERGY
·
2013
·
IF 4.781
Lei Miao,Li Fen Su,Sakae Tanemura,Craig A.J. Fisher,Li Li Zhao,Qing Liang,Gang Xu
Simultaneous antireflective and self-cleaning properties have been realized by depositing double-layered SiO 2 –TiO 2 coatings onto glass substrates using a combined sol–gel dip-coating process in which the two oxide layers were deposited in succession. The first layer is composed of a hybrid methyl-functionalized nanoporous SiO 2 material that provides on average a 6% anti-reflection gain. The degree of antireflectivity can be controlled by adjusting the thickness and refractive index by selecting suitable solvents and pore-forming agents in the coating mixture. The second layer is an ultrathin TiO 2 nanoporous layer deposited on top of antireflective layer. The high hardness of the TiO 2 top layer acts as a protection barrier toward mechanical damage and ensures the surface is self-cleaning. An average anti-reflectivity of 3.4% achieved over a spectrum range of 400–800 nm for the optimal SiO 2 –TiO 2 bilayers is obtained. It is found that a homogeneous pore size distribution in the SiO 2 layer introduced by using isopropanol as the solvent can compensate for the TiO 2 band edge absorption based on the optical interference that occurs between the two layers. These systems are easy to produce on a large scale at low cost and exhibit high mechanical and chemical durability. These materials are thus suitable for use as bifunctional antireflective and self-cleaning coatings for use as large substrates for solar cells.
研究领域:
材料科学
·
光学涂层
·
纳米技术
·
可再生能源
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高影响因子
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