ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Junjie Wang,Zhihao Lu,Kun Gao,Xing Kang,Chengcheng Zhu,Furong Qiao,Haonan Chen,Zhuoyao Li,Wei Huang,Gang Lu
Photocatalytic reforming of ethanol provides an effective way to produce hydrogen energy using natural and nontoxic ethanol as raw material. Developing highly efficient catalysts is central to this field. Although traditional semiconductor/metal heterostructures (e.g., Rh/TiO2) can result in relatively high catalyst performance by promoting the separation of photoinduced hot carriers, it will still be highly promising to further improve the catalytic performance via a cost-effective and convenient method. In this study, we developed a highly efficient photocatalyst for ethanol reformation by preparing a ternary composite structure of Rh/TiO2/g-C3N4. Hydrogen is the main product, and the reaction rate could reach up to 27.5 mmol g–1 h–1, which is ∼1.41-fold higher than that of Rh/TiO2. The catalytic performance here is highly dependent on the wavelength of the light illumination. Moreover, the photocatalytic reforming of ethanol and production of hydrogen were also dependent on the Rh loading and g-C3N4:TiO2 ratio in Rh/TiO2/g-C3N4 composites as well as the ethanol content in the reaction system. The mechanism of the enhanced hydrogen production in Rh/TiO2/g-C3N4 is determined as the improvement in the separation of photoinduced hot carriers. This work provides an effective photocatalyst for ethanol reforming, largely expanding its application in the field of renewable energy and interface science.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Xiaotu Yang,Zihao Yue,Ruixiang Deng,Zhengliang Zhang,Tao Zhang,Lixin Song
Stability hinders further development of all-inorganic CsPb X 3 ( X = Cl, Br, I) quantum dots (QDs) although they exhibit promising prospects in optoelectronic applications. Coating perovskite quantum dots (PQDs) with a glass network to form QD glass can significantly improve their stability. However, the dense glass network degrades their luminescent performance. In this work, the crystallization behavior of PQDs in glass and better luminescence properties are prompted by introducing titanium dioxide into borosilicate glass. The luminescence intensity of TiO 2 -doped CsPbBr 3 QD glass is increased by 1.6 times and the PLQY is increased from 49.8 % to 79 % compared to the undoped glass. Evidence proves that the improved properties are attributed to the enhanced nucleation effect of titanium dioxide during the annealing process. Benefiting from the densification of the glass network caused by titanium dioxide doping, the stability of the PQD glass is further improved. LED devices with an ultra-wide color gamut that fully covers the NTSC1953 standard and achieves 128.6 % of the NTSC1953 standard as well as 91.1 % of the Rec.2020 standard were fabricated by coupling PQD glass powder, demonstrating promising commercial applications of PQD glass in optoelectronic displays.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yu-Xin Liao,Qi-Rui Zhang,Zhi-Lin Zheng,Jing Shao,Liang Ma,Ping-Li Qin,Xiang-Bai Chen
The design of functional materials with efficient light absorption and charge separation is crucial for photocatalytic energy conversion. Herein, a plasmonic TiN/TiO 2 /ReS 2 ternary hybrid is prepared, which exhibits exceptional photocatalytic activity caused by the plasmon-mediated light absorption and multi-interfacial charge separation. The ternary hybrids were synthesized by heating TiN, Re, and S sources at high pressure and temperature. The TiN was partially oxidized to form TiN/TiO 2 hybrids, which were then embedded in ReS 2 nanoflowers through Ti-S bonds, creating a 3D flower-like structure with multiple interfaces. The plasmon resonance of TiN and the bandgap excitations of ReS 2 and TiO 2 endow the hybrids with efficient light absorption in UV–VIS-NIR region. Additionally, the novel embedded structure and the multiple interfaces between TiN, TiO 2 , and ReS 2 facilitate the formation of built-in electric fields and multi-channel charge transfer, which efficiently quicken photoinduced carriers’ migration and hot electron injection. Consequently, the TiN/TiO 2 /ReS 2 hybrids demonstrate a high-efficiency photocatalytic hydrogen generation rate, which is 12.1 times that of commercial P25. Notably, the hybrids also exhibit high photocatalytic activity under near-infrared light irradiation. This study offers innovative insights into the design of photocatalysts and suggests that the prepared materials could be utilized in solar-driven energy conversion applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Rui Hua,Jiale Zhao,Houde She,Lei Wang,Jingwei Huang,Qizhao Wang
Copper serves as an exceptional cocatalyst, enhancing CO 2 molecular adsorption-activation and stabilizing reaction intermediates, thus demonstrating remarkable potential in photocatalytic CO 2 conversion to diverse hydrocarbons. However, the complex and variable oxidation states of Cu make the role and mechanism of low-valent Cu species (Cu 0 /Cu + ) in CO 2 photoreduction poorly understood. This study precisely controlled the valence distribution of Cu species on TiO 2 surfaces using a red phosphorus-mediated hydrothermal synthesis strategy, successfully constructing an efficient catalyst for CO 2 photoreduction. The optimized composite exhibits a CH 4 evolution rate of 64.44 μmol·g −1 ·h −1 under simulated sunlight, representing a 54-fold improvement over pristine TiO 2 while maintaining high selectivity of 86 %. The enhanced photocatalytic performance and product selectivity originate from Cu incorporation, which substantially improves light absorption capacity, prolongs charge carrier lifetime, and reduces charge transfer resistance. Combined characterization and DFT calculations conclusively demonstrate that Cu 0 and Cu + serve as the active sites for CH 4 and CO generation, respectively. The key intermediate *CO preferentially desorbs as CO from Cu + sites, while *CO adsorbed on Cu 0 sites undergoes further hydrogenation to form CH 4 . This work provides novel strategies for developing efficient CO 2 photoreduction catalysts and elucidates the atomic-scale mechanistic role of Cu valence states in regulating CO 2 reduction pathways.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Lei Ding,Lin Wang,Shuai Chu,Wei Zhai,Jie Li,Xiaoru Li,Zhengbo Jiao
Environmental issues, such as increasingly polluted water resources and energy shortages, have led to the need for new strategies to promote sustainable progress and enhance human well-being. Photocatalysis is widely recognized as a promising technology for environmental sustainability. MXene is a two-dimensional nanotransition metal material, which has attracted extensive attention in the field of photocatalysis. In MXenes, titanium carbide (Ti3C2) has been extensively studied for its application in photocatalysis due to its unique nanolayered structure. The Ti site on the surface of Ti3C2 has a stronger redox activity than traditional C materials, and Ti3C2 has high electrical conductivity. The focus of this study is to obtain the Ti3C2/TiO2 composite by in situ calcination of Ti3C2 and then combine Mo,W:BVO with TiO2 to form feasible heterojunctions. The excellent electrical conductivity of Ti3C2 promotes the transfer of electrons and holes between Mo,W:BVO and TiO2, thus establishing a cascade that minimizes charge carrier recombination and exhibits strong photocatalytic activity. Through a series of photocatalytic tests, the optimum calcination temperature and time of Ti3C2 (550 °C, 2.5 h) and the doping amount of Ti3C2 (2 mg/mL) were determined. Under these conditions, a high current density of 3.8 mA cm–2 was obtained, showing excellent photostability. This study confirmed the strong photocatalytic activity of the synthesized nanoscale composites Mo,W:BVO/TiO2/Ti3C2, providing valuable insights for the design of efficient and sustainable photocatalysts in the future.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Lijia Huang,Ge He,Yi Yuan,Tian Cheng Zhang,Yan Wang,Shaojun Yuan
Rationally regulating the photogenerated carrier transfer behavior and band structure of TiO2 through metal doping is an effective strategy for enhancing the photocatalytic activity in the removal of malodorous gas hydrogen sulfide (H2S). In this study, TiO2 modified with the doping of Group IIIA metal ions (Al3+, Ga3+, and In3+) was utilized as an efficient photocatalytic desulfurizer under ultraviolet irradiation. Among these samples, the 4% In-TiO2 exhibited the best photocatalytic H2S removal efficiency of 100% for a duration of 120 min, nearly 3 times higher than that of commercial P25 TiO2. The UV–vis DRS and PL spectra demonstrated that the incorporation of Group-IIIA metal ions into TiO2 resulted in the formation of a shallow acceptor level above the valence band in the energy band structure, which induced a slight redshift at the edge of the visible light absorption band and reduced the electron–hole recombination rate. In situ DRIFTS and DFT calculations revealed that the adsorption and activation of H2S occurred simultaneously on In-TiO2, facilitated by its strong oxygen vacancy formation and adsorption capability. The ln3+ doping into TiO2 promoted photothermal-catalytic oxidation reaction on the surfaces of In-TiO2, thereby significantly enhancing the desulfurization efficiency of H2S. This study not only offers a deeper understanding of the regulated band structure of TiO2 by doping of Group IIIA metal ions, but also provides a promising and green photocatalytic desulfurizer of In-TiO2 for efficient removal of H2S.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wenhao Yang,Dan You,Bingnan Deng,Zhicong Ni,Chunman Yang,Fei Wang,Yingjie Zhang,Xue Li,Yiyong Zhan,Yunxiao Wang
Lithium–sulfur (Li–S) batteries represent a promising energy storage system with the potential to replace traditional lithium-ion batteries. Recent research has explored the practical applications of Li–S batteries. However, due to the insulation properties of the sulfur components and the shuttle effect of polysulfides, the practical application of Li–S batteries is hindered by poor cycle stability and short life. In this study, we developed a controllable three-dimensional Ti 3 C 2 structure design process, and through in situ growth of TiO 2 nanocrystals, we prepared three-dimensional porous materials with TiO 2 @Ti 3 C 2 heterostructures. These materials constructed using two-dimensional lamellar Ti 3 C 2 function as a conductive skeleton to improve the conductivity of the sulfur cathodes, and through the in-situ growth of nano-TiO 2 to introduce more binding sites and provide more chemisorption sites to limit the dissolution and shuttle of polysulfides. In addition, the TiO 2 @Ti 3 C 2 heterointerface generated in situ on the surface of the lamellar structure can induce an internal electric field and increase active reaction sites, which promotes reaction kinetics, accelerates charge diffusion/transport, and promotes LiPS transformation. The materials designed in this study can effectively restrain the shuttle effect by realising the association process of adsorption, capture, and transformation of polysulfides. Thus, when applied as the sulfur cathode frame, it shows a high specific capacity of 1261.41 mAh g −1 at a rate of 0.1 C. In addition, a specific capacity of 66.5% is maintained over 500 cycles at a rate of 1 C. This strategy supports the development of Li–S batteries with extraordinary performance and opens up a promising way to design next-generation electrochemical energy storage devices.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Ying Tian,Kunfeng Zhang,Haoran Zhao,Bo Peng,Jinxia Liang,Hongxia Chen,Runfeng Huang,Yuanyuan Wei,Hanyu Chen
Novel 2D/2D TiO 2 /BiOBr (TOB- x , x represented the molar ratio of TiO 2 /BiOBr) heterostructures with dual oxygen vacancies were fabricated via an in-situ hydrothermal approach. Owing to the construction of p-n heterostructure and strong interface interaction, a S-scheme charge transfer path was formed, which facilitated efficiency separation and transfer of charge and retained strong redox capacities of photoexcited electrons and holes. Simultaneously, the introduction of oxygen vacancies induced strong photoabsorption, improving the light harvesting capacity. The oxytetracycline (OTC) degradation efficiencies over TOB-0.05 and TOB-0.1 were significantly improved relative to those of single components. The TOB-0.1 photocatalyst displayed the best photocatalytic activity, which was 3.75 and 1.76 times higher those of TiO 2 -Vo and BiOBr-Vo, respectively. Furthermore, we also examined the effects of pH, ions, and water matrixes on OTC conversion of TOB-0.1, and investigated the photocatalytic degradation mechanism. This work provides a useful guideline for constructing high-efficiency photocatalysts for wastewater treatments by combining 2D/2D heterojunction and dual-defect engineering.
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Photonics
·
2025
·Vol. 12
·期 8
·742
·
IF 1.9
Yan Zhang,Ming Ma,Zirun Peng,Na Liu,Hanzhuo Zhang,Peizhong Feng,Cheng Xu
The laser damage resistance of optical films holds significant practical importance, as it largely determines both the maximum power output of laser systems and the overall stability of the entire optical assembly. A comprehensive investigation was conducted to examine the influence of both single additives—acetylacetone (ACAC) and diethanolamine (DEA)—and dual-additive systems, specifically ACAC combined with polyethylene glycol 200 (PEG 200) and DEA combined with PEG 200, on TiO2film properties and their laser-induced damage behavior under 1064 nm irradiation. It demonstrated that the films fabricated using ACAC exhibited smoother surfaces. Nevertheless, the sol prepared with DEA was more stable, resulting in films with superior optical properties and an enhanced laser-induced damage threshold (LIDT). The incorporation of dual additives further improved the films’ LIDT. Specifically, the film with DEA and PEG 200 achieved the highest LIDT, reaching 21.5 J/cm2. Moreover, all films exhibited defect-induced damage, yet distinct damage morphologies were observed across different samples. The single-additive films predominantly displayed stress-type damage patterns, whereas the dual-additive films manifested melting-type damage characteristics. Furthermore, through a combination of experiments and calculations, it was revealed that the reasons why the film with DEA and PEG 200 achieved the highest LIDT were twofold: first, the high thermal conductivity of DEA reduced the maximum temperature at the defect center within the film; second, the long molecular chains of PEG 200 created a looser film structure that better mitigated damage caused by stress and expansion during laser irradiation. This study presents a promising approach to enhancing the LIDT through the strategic selection of additives with high thermal conductivity while simultaneously incorporating organic compounds with long molecular chains to develop effective dual-additive films.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yonghui Yang,Hengwei Yan,Zhanwei Liu,Shenghui Guo,Mingyi Hu,Rui Xia
This study investigated the effect of TiO 2 dissolution behavior in NaF–K 2 TiF 6 molten salts and subsequent electrolysis on the production of dense titanium powder. Under isothermal saturation conditions at molar ratios of 1.3–1.9 and temperatures of 800°C–890°C, TiO 2 solubility increased with temperature, reaching 9.75 wt% at 890°C and a 1.3 molar ratio. Dissolution kinetics revealed a two-stage process: an initial zero-order reaction during the first 5 min, followed by a first-order reaction for approximately 90 min. The dissolved TiO 2 formed TiOF n 2−n complexes, leading to K 2 NaTiOF 5 precipitation. Higher saturation of TiOF n 2−n resulted in finer particles, while lower saturation promoted the formation of coarser particles. Electrolysis experiments were conducted at 800°C with a NaF–K 2 TiF 6 molar ratio of 1.3:1. The results revealed that an increase in cathode current density reduced both the specific surface area and oxygen content of the titanium powder. At cathode and anode current densities of 1.9 and 0.31 A/cm 2 , dense spherical titanium powder with 0.22 wt% oxygen was obtained after 4 h of electrolysis. These findings confirm the feasibility of producing dense titanium powder via fluoride-based molten salt electrolysis.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Leming Zhen,Qiyuan Qin,Zhaofu Meng,Na Sun,Ze Liu,Ruohan Cheng,Can Xu,Wenhui Liu,Jingbing Xue
With the development of the nanotechnology industry, the possible coexistence of engineering nanoparticles with organic and heavy metal pollutants in aquatic systems has become a hot issue. However, how different nanoparticles affect the environmental behavior of oxytetracycline (OTC) − copper (Cu 2+ ) complex pollution remains unclear. In this study, we investigated the complex adsorption behavior of nano-TiO 2 and graphene oxide (GO) to OTC and Cu 2+ in water, and the differences of adsorption mechanism are discussed with characteristics analyses. When OTC and Cu 2+ coexist, Cu 2+ formed complexes with OTC, consuming oxygen-containing functional groups of OTC and reducing its adsorption on both nanoparticles. OTC does not affect Cu 2+ adsorption on nano-TiO 2 , but promotes Cu 2+ adsorption on GO. The OTC adsorption on nano-TiO 2 was primarily driven by hydrogen bonding and electrostatic attraction, leaving it with potential mobility. In contrast, the adsorption of OTC on GO was mainly through electrostatic attraction, π-π complexation and hydrogen bonding, and OTC reduced GO to rGO. These strong interactions stabilized OTC on GO surface, reducing its environmental mobility. The results of the research are of great environmental significance for exploring the impact of engineered nanoparticles discharged from industrial production in water on the combined pollution of OTC and Cu 2+ .
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Food and Bioprocess Technology
·
2025
·
IF 5.8
Liu Danfei,Li Xiaoxuan,Zhang Chuanxiang,Chen Yuyang,Zhou Wenxuan,Zhang Changfan
In this study, amine-responsive bilayer films (agar/black wolfberry anthocyanin (AG/BWA) and agar/black wolfberry anthocyanin/sodium alginate/hydrophobically modified TiO 2 nanoparticles (AG/BWA/HM)) were fabricated. These films consist of a sensing layer made of agar/anthocyanin and a protective layer composed of sodium alginate and hydrophobically modified TiO 2 nanoparticles (HMTI). The fabrication process involved the solvent evaporation method and screen-printing technique, with anthocyanins extracted from black wolfberry serving as the key component in the sensing layer. The prepared films were characterized by FTIR, SEM, XRD, and UV spectroscopic techniques. Water contact angle measurements showed that the AG/BWA/HM film was hydrophobic (> 90°). The incorporation of anthocyanins increased the tensile strength of the films by 6–10 MPa, the elongation at break by 3–6%, and the water solubility by 4–15% compared to control films (agar film). Light stability and storage stability tests revealed that the incorporation of hydrophobically modified TiO 2 effectively enhanced the stability of the films. When exposed to different pH values, the bilayer films showed different color changes, with a significant change from acidic to basic. The ammonia vapor test showed that the sensitivity of the AG/BWA/HM film was improved by 20.1% compared to the AG/BWA film. The indicator film was used to monitor the deterioration of pork at room temperature (25 ℃), and the color of the AG/BWA/HM film changed significantly with the increase of total volatile basic nitrogen (TVBN) of pork stored at room temperature (25 ℃) for 24 h as the freshness of pork changed gradually, indicating the promising application of this double-layer indicator film in the monitoring of meat freshness. Graphical
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