THIN SOLID FILMS
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2025
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IF 2
Iram Hussain,Lisha Zhang,Zhizhen Ye,Jin-Ming Wu
In this work, a low-temperature method for creating nanostructured TiO 2 thin films with controlled morphologies for the photocatalytic degradation of the persistent antibiotic pollutant ofloxacin in water is presented. A Ti–H₂O₂ interaction was used to produce hydrogen titanate nanowires, which were subsequently converted into three different nanostructures: anatase nanowires by calcined at 450°C, porous nanorods and hierarchical nanoflowers by treating at 80°C for 72 hours with hot water and sulfuric acid, respectively. Controls over surface area, hydroxyl group contents, and crystal phase composition were made possible by these post-treatments. With a reaction rate constant of 0.72 h⁻¹ and a photocatalytic efficiency of 98% ofloxacin degradation in 4 hours under UV light, TiO 2 nanoflowers outperformed commercial benchmark P25 mixed phase TiO 2 nanoparticle films (0.64 h⁻¹) among the different nanostructures. The mixed anatase-rutile phase, high surface area of 49.1 m²/g, large pore volume of 0.15 mL/g, and numerous surface hydroxyl groups are responsible for the superior performance. These results show that morphology-engineered TiO 2 films can be used to treat water effectively through photocatalysis.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Ruijie Ma,Huimin Gao,Jinpeng Zhang,Jieying Jing,Wen-Ying Li
Photocatalytic reduction of CO 2 to formic acid (HCOOH) offers a sustainable pathway for carbon utilization, yet its efficiency is fundamentally limited by poor CO 2 adsorption and rapid electron-hole recombination in conventional photocatalysts. To address this challenge, a series of Pd-loaded hydrogenated TiO 2 catalysts (x wt%Pd/H-TiO 2 ) were developed through a synergistic hydrogen reduction-impregnation strategy, aiming to regulate the electron density of Pd active sites and enhance interfacial charge separation. Systematic characterization revealed that increasing Pd loading (0.6–1.4 wt%) effectively trapped photogenerated electrons, suppressing recombination losses and elevating electron density at Pd sites. Combined with optimized CO 2 adsorption capacity (0.178 mmol·g −1 ) and accelerated charge transfer, the 1.0 wt%Pd/H-TiO 2 catalyst achieved a HCOOH production rate of 14.14 mmol·g cat −1 ·h −1 under mild conditions (30 °C, 2.0 MPa, 4.57 mW·cm −2 ), outperforming most reported TiO 2 -based systems. Mechanistic studies further demonstrated a strong correlation between Pd-induced electronic effects and multi-electron CO 2 activation kinetics. This work provides a scalable catalyst design paradigm for balancing charge dynamics and surface reactivity in photocatalytic CO 2 valorization.
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高影响因子
ACTA MATERIALIA
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2025
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IF 9.3
Yuhua Liu,Qing Liang,Fuxi Liu,Wenwen Li,Aofei Wei,Tiantian Xu,Xu Zou,Bingsen Zhang,Wei Zhang,Weitao Zheng
It remains a significant challenge for simultaneously regulating the water dissociation and hydrogen adsorption/desorption of Ru in alkaline media. Herein, we successfully architected an entity of individually-functionalized spatial valence-asymmetric Ru sites on Ru/TiO 2 quantum dots for high-performance alkaline hydrogen evolution. The Ru nanoclusters were self-adaptively grown along the Ti vacancies, triggering the phase transformation from anatase to rutile TiO 2 . The well-defined Ru/TiO 2 interface produced a strong electronic metal-support interaction, acquiring a Ru site with asymmetric electronic state. Resultantly, the anisotropy of the surface low-valence Ru δ- site and the interface high-valence Ru δ+ site break the scaling relationship of water dissociation, hydroxyl and hydrogen adsorption. The asymmetrical Ru electronic state achieves 15 mV overpotential at 10 mA cm -2 and delivers a high mass activity of 5.4-fold than commercial Pt/C at 100 mV, outperforming most reported Ru-based catalysts. Our work sheds light on the potential of support-crystal phase engineering to design catalysts with the required electrocatalytic performance.
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高影响因子
FOOD CHEMISTRY
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2025
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IF 9.8
Xiaoxiao Dong,Chang Lu,Shuaijie Guo,Siqi Zhang,Xuelian Hu,Wenliu Wang,Yiwei Tang,Shuo Wang,Xiuying Liu
A magnetic NiFe 2 O 4 @TiO 2 @Au composite was successfully synthesized via layer-by-layer assembly approach and exhibited excellent SERS performance. The composite was functionalized with an aptamer modified with Cy3, serving as the Raman signal reporter, and was hybridized with complementary DNA oligonucleotides (cDNA) to construct the NiFe 2 O 4 @TiO 2 @Au@ssDNA SERS aptasensor. This aptasensor enabled the development of a sensitive, specific, and straightforward SERS assay for acetamiprid detection, exhibiting good accuracy. Under optimized conditions, an inverse correlation was established between the acetamiprid concentration and the Raman intensity at the characteristic peak of 1132 cm −1 , spanning a range of 10 −1 -10 4 nmol/L with a LOD of 8.4 × 10 −1 pmol/L. Standard addition experiments to three types of leafy vegetables samples yielded recoveries ranging from 94.30 % to 111.83 %, with a relative standard deviation of <5.56 %. This method shows potential for detecting other hazardous substances in food and environmental samples by simply changing the corresponding aptamers and cDNA.
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DOI
PubMed
高影响因子
VACUUM
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2025
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IF 3.9
Aijia Sun,Yang Zhao,Jiamu Li,Han Lai,Huayi Li,Zhengchun Yang,Jie He,Peng Pan,Rui Zhang
Plastic pollution represents a significant global environmental challenge requiring advanced mitigation strategies. This investigation systematically examines the photocatalytic degradation performance of CuO/TiO 2 composites to prove the feasibility of rapid degradation of polyethylene terephthalate (PET). Various advanced characterization methodologies, including Scanning Electron Microscopy (SEM), X-ray Diffractometry (XRD), and X-ray Photoelectron Spectroscopy (XPS), were employed to verify the successful synthesis of nanocomposites and elucidate their distinctive structural attributes and superior photocatalytic functionality. Implementation of a two-step photocatalytic degradation protocol enabled PET to achieve remarkable mass reduction of 97.39 ± 0.79 % after 2 h illumination, representing approximately 30-fold enhancement compared to untreated PET samples. Furthermore, the use of PET film as a pollutant verified the practical feasibility of this method, highlighting the potential of CuO/TiO 2 composites for plastic degradation. Complementary free radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopic analyses identified hydroxyl radicals (•OH) as the predominant active species governing PET decomposition pathways. The proposed mechanistic model elucidates the synergistic effects of interfacial energy band modifications between constituent semiconductor components, which critically enhance photoinduced charge carrier separation efficiency. Notably, the study not only achieved the efficient degradation of PET but also provided an efficient method for solving environmental plastic pollution in the future.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Mengran Li,Jialing Gu,Qinke Tang,Jiabao Bai,Bin Cui,Ruoyu Ma,Yunfeng Zhu,Rui Shi,Yao Zhang,Jiguang Zhang,Yana Liu,Jun Wang,Zhixin Ba,Xiaohui Hu
Magnesium hydride (MgH 2 ) is a highly promising solid-state hydrogen storage material, but its application is hindered by sluggish kinetics and high operating temperatures. Currently, alloying and catalysis are effective strategies for improving the hydrogen storage performance of MgH 2 , but the designing of a hydrogen ab/desorption system which synergistically combines them remains a challenge. Herein, Mg Al solid solution and intermetallic compounds (Al species), and a spherical Nb-doped TiO 2 (Nb-TiO 2 ) were introduced into Mg/MgH 2 to enhance the hydrogen storage performance. Al species significantly enhanced the dehydrogenation thermodynamics of Mg 90 Al 10 - 15 at.% Nb-TiO 2 , while improving the hydrogen ab/desorption kinetics of the composite synergistically with the Nb-TiO 2 . Density functional theory (DFT) calculations revealed that the synergism of Al species and Nb-TiO 2 led to preferential adsorption of H atoms at the interfaces of Nb-TiO 2 and Mg 17 Al 12 , with abundant electron transfer. The dehydrogenation enthalpy ( ΔH ) of Mg 90 Al 10 - 15 at.% Nb-TiO 2 decreased from 80.86 (MgH 2 ) to 69.05 kJ/mol, while its hydrogen desorption apparent activation energy ( E a ) decreased from 146.40 (MgH 2 ) to 88.80 kJ/mol simultaneously. The composite could absorb 4.70 wt% H 2 within 2000 s at 200 °C and showed a dehydrogenation onset temperature of 209 °C. This work reveals a synergistic effect between alloying and catalysis, advancing both the performance enhancement strategies and the mechanistic understanding of Mg-based hydrogen storage materials.
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高影响因子
ACS ES&T Water
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2025
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IF 4.3
Zihao Hong,Ziyi Yuan,Zhiyu Liu,Raphael Semiat,J. Paul Chen
Membrane distillation (MD) is a thermal-based membrane separation process driven by vapor pressure differences generated by temperature differences, and has great potential for applications in desalination, wastewater treatment, and resource recovery. However, during long-term operation, wetting and fouling lead to deteriorated permeate quality and treatment efficiency. Herein, we developed a surface modification method for the polyvinylidene difluoride (PVDF) membrane to improve the antifouling and antiwetting ability without sacrificing permeability. This method imparts superhydrophobic properties to the PVDF membrane by depositing fluorinated TiO2 nanoparticles (NPs) on its surface. The modified PVDF membrane exhibited a higher water contact angle (WCA, 157.4°) and an ultralow water sliding angle (WSA, 2.1°), indicating successful superhydrophobic modification. The modified PVDF membrane possessed superior resistance against fouling and wetting. In 150-h operation of direct contact membrane distillation, it exhibited robust performance in treating a hypersaline solution (100 g/L NaCl) containing foulants (50 mg/L humic acid). The results also verified that the TiO2 layer was firmly attached to the membrane surface. Our study demonstrates that this surface modification approach can effectively improve the membrane performance of the MD process for treatment of high-salinity solution containing foulants.
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高影响因子
CEMENT & CONCRETE COMPOSITES
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2025
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IF 13.1
Jihong Jiang,Yanchun Miao,Qianping Ran,Yali Li,Yunjian Li,Zongshuo Tao,Zeyu Lu
Fly ash, a by-product of coal combustion, is a pozzolanic solid waste with annual production of 1.63 billion tonnes, which has been widely used to replace cement clinker to develop sustainable concrete. However, the incorporation of high volumes of inert fly ash significantly reduces the early mechanical strength of concrete due to its low pozzolanic activity. This study presents an innovative strategy to effectively enhance the reactivity of fly ash by utilizing hydroxyl free radicals (•OH), highly reactive oxidative species generated by nano-TiO 2 under UV light excitation. Experimental results demonstrated that photoexcited nano-TiO 2 significantly promoted the depolymerization of inert glassy phases in fly ash, resulting in a 28 % increase in Ca(OH) 2 consumption within 72 h. Consequently, the compressive and flexural strengths of mortar at 28 days increased by 37 % and 16 %, respectively, with a strength activity index reaching 95.4 %. In addition, the water absorption and chloride ion diffusion coefficient were reduced by 15 % and 18 %, respectively, due to a more refined pore structure driven by enhanced pozzolanic reactivity. Density Functional Theory (DFT) calculations further revealed that •OH substantially lowered the energy barrier for Si-O-Al bonds cleavage (from 22.93 kcal/mol for OH − to 8.54 kcal/mol for •OH), confirming its superior catalytic efficiency and thermodynamic advantage. In conclusion, the findings confirm that photoexcited nano-TiO 2 can serve as an effective activator for enhancing the utilization efficiency of fly ash in sustainable concrete.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
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IF 14.3
Martin C. Koo,Yu Zhang,Bo Cai,Chen-Ming Liang,Shao-Hang Shi,Hua-Long Peng,Shu-Hao Yang,Xiao-Bo Sun,Guang-Sheng Wang
Microwave-absorbing materials (MAMs) play an important role in reducing electromagnetic pollution. However, achieving a balance between low filler loading, low minimum reflection loss (RL min ) and wide effective absorption bandwidth (EAB) for efficient absorption of microwaves remains challenging. In this work, an innovative method of using CO 2 atmosphere annealed Ti 3 C 2 T x MXene (C/TiO 2 ) combined with nickel nanowires (NiNW) via ultrasonic treatment was performed to yield C/TiO 2 /NiNW (CTN) composites with abundant NiNW/TiO 2 contacts. The electromagnetic (EM) parameters of the as-synthesized composites were closely studied through a series of experiments and computed theoretical calculations. Through the establishment of built-in electric fields (BIEFs) at the NiNW/TiO 2 interface, the derived CTN composite demonstrated improved dielectric properties and impedance matching characteristics that are clearly reflected on the microwave absorption performance of our as-synthesized MAMs, with RL min improving by 127.9% from −31.93 dB to −72.77 dB, and widest EAB increasing by 25.9% from 4.25 GHz to 5.35 GHz, at a low filler loading of 10 wt.%. This work investigates the mechanisms by which BIEFs influence EM parameters, providing critical insights into improving microwave absorption performance via BIEF structural design.
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高影响因子
Molecular Catalysis
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2025
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IF 4.9
Hui Kang,Quan Shao,Luming Li,Yanlin Zhang,Xin Xiao,Yuefeng Liu
The gas-inducing strategy has proven highly effective in constructing high-density oxide interfaces. In this study, we utilized CO 2 hydrogenation reaction to induce the spontaneous dispersion of In 2 O 3 species on the surface of TiO 2 , forming numerous InO x /TiO 2 interfaces. The 2 %In 2 O 3 /TiO 2 catalyst demonstrated a 33-fold enhancement in reverse water-gas shift reaction (RWGS) performance after dispersion. Multi-technique characterization revealed that H 2 in the reactants reduced In 2 O 3 to partially reduced states (In +(3-x) ), which were more prone to migration. The spontaneous dispersion was not solely driven by the strong interaction (anchoring) ability of the support for In 2 O 3 species. Further mechanistic studies showed that the high-density InO x /TiO 2 interface formed via spontaneous dispersion significantly promoted the formation of formate species during CO 2 hydrogenation, which decomposed into CO at lower temperatures (297 °C), thereby improving catalytic performance. This work highlights the potential of atmosphere-induced structural evolution in catalysis, underscoring the importance of a comprehensive analysis of the activation, migration, and anchoring mechanisms, as well as the catalytic promotion principles of the induced structure.
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高影响因子
MATERIALS RESEARCH BULLETIN
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2024
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IF 5.3
Yuanmei Xu,Wenbing Chen,Xueshi Li
Much attention has been focused on the fabrication of TiO 2 microspheres due to their excellent properties and attractive potential in many fields. Here, undoped 3D hierarchical TiO 2 microspheres (TMS) were synthesized in situ on Ti mesh using a hydrothermal method by varying NaOH concentration, reaction time and temperature. The 3D TMS grown along the surface of the woven wires of the Ti meshes, using the metal Ti meshes as a substrate, which resulted in improved conductivity. Meanwhile, the original Ti mesh with the macroporosity (due to the 15 % open area of the mesh) can act as fast proton mass diffusion. As a result, the flexible TMS-Ti photoelectrodes exhibit an excellent current density of 1.63 mA/cm 2 at a potential of 1.23 V (vs Ag/AgCl). Therefore, the in situ synthesis of TiO 2 microspheres on Ti mesh is highly desirable for flexible devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Weilin Zhong,Chao Wang,Hailun Zhao,Suqing Peng,Zhipeng Tian,Riyang Shu,Ying Chen
Constructing efficient photothermal catalysts and understanding their photothermal synergistic effects for solar-driven conversion of biomass derivatives towards clean energy carriers are essential in the development of renewable energy and waste disposal. In this study, Au nanoparticles loaded on TiO 2 nanoflakes were synthesized as photothermal catalysts for bio-derived glycerol photothermal reforming hydrogen production. The results found that the generation of photogenerated carriers is a crucial process in the photothermal reforming of glycerol. In particular, the hot electrons excited by plasmonic Au nanoparticles did not participate in the hydrogen production reaction through neither direct nor indirect transfer. Instead, the hot carriers promoted the intermolecular collisions between reactants through thermalization. In addition, such generated local heat could reduce the semiconductor impedance and improve the migration efficiency of photogenerated carriers, resulting in an efficient conversion of gas phase intermediates. As obtained, photothermal enhanced reforming can improve hydrogen yield by 58%, while the hydrogen generated constant and the absorption equilibrium constant was calculated as 2.38 mmol∙g −1 ∙h −1 and 7.00 mL∙mmol −1 .
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高影响因子
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