JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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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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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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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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LANGMUIR
·
2024
·
IF 3.7
Yuanzhen He,Dengjie Zhong,Yunlan Xu,Ran Jiang,Jiayou Zhang,Pengfei Liao
A La-doped Ti/SnO2-Sb2O4 electrode with TiO2-NTs intermediate layer (Ti/TiO2-NTs/SnO2-Sb2O4-La) was created via the electrodeposition technique. The physicochemical and electrochemical properties of the electrode were analyzed through FESEM, XRD, XPS, CV, and LSV electrochemical tests. The results showed that TiO2-NTs were tightly packed on the surface of Ti substrate, thus improving the binding force of the SnO2-Sb2O4-La coating, offering greater specific surface area, more active spots, higher current response, and longer lifespan for the degradation of rhodamine B. The lifespan of the Ti/TiO2-NTs/SnO2-Sb2O4-La electrode reached 200 min (1000 mA cm–2, 1 M H2SO4), while the actual service life was up to 3699 h. Under the conditions of initial pH 3.0, Na2SO4 concentration of 0.1 M, current density of 30 mA cm–2, and initial rhodamine B concentration of 20 mg L–1, the color and TOC removal rate of rhodamine B reached 100% and 86.13% within 15 and 30 min, respectively. Rhodamine B was decomposed into acids, esters, and other molecular compounds under the action of •OH and SO4•– free radicals and electrocatalysis, and finally completely mineralized into CO2 and H2O. It is anticipated that this work will yield a novel research concept for producing DSA electrodes with superior catalytic efficacy and elevated stability.
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ChemCatChem
·
2025
·
IF 3.9
Yu Tang,Kaiyang Xu,Lingfeng Weng,Yuanjie Xu,Li Tan,Lizhi Wu
Cyclopentanone (CPO) is a high-value platform chemical widely used in fuel, fragrances, and polymers, yet its sustainable production from biomass remains challenging. This work addresses this gap by developing efficient Ni/TiO 2 catalysts through crystal phase engineering of TiO 2 supports (anatase, rutile, mixed-phase P25) for aqueous-phase hydrogenative ring-rearrangement of furfural (FAL) to CPO. Crucially, the TiO 2 phase dictates the Ni–O–Ti interface structure, governing nickel speciation and reactivity. Ni supported on mixed-phase P25 achieves exceptional performance under industrially relevant conditions: 91.1% FAL conversion, 89.3% CPO selectivity, and specific rate of 71.6 h −1 , surpassing catalysts on pure anatase (9.1% conversion) or rutile (55.8% conversion). Physical mixture experiments confirm this superiority stems from the intrinsic interface of P25, not component blending. Characterization reveals that P25 stabilizes a multifunctional surface ensemble: metallic Ni⁰ (18.0% by XPS) enables hydrogenation, while cationic Ni 2+ facilitates acid-catalyzed dehydration and ring rearrangement. Simultaneously, sufficient metal–support interaction permits in situ regeneration of active sites. The optimized 1Ni/P25 demonstrates robust stability over five cycles with retained selectivity (>90%), showcasing practical durability. This study provides a scalable design strategy—support crystal phase tuning—to engineer cost-effective, multifunctional catalysts for industrial biomass upgrading, advancing green manufacturing of cyclic ketones without precious metals. Graphical This study investigates how the TiO 2 crystal phases (anatase, rutile, and P25) affect Ni-based catalysts in the conversion of furfural (FAL) to cyclopentanone (CPO). Ni/TiO 2 -P25 shows superior performance: 91.1% FAL conversion and 89.3% CPO selectivity, outperforming that on anatase and rutile. It stabilizes mixed-valence Ni (Ni° for hydrogenation, Ni 2+ for acid-catalyzed steps) via unique Ni–O–Ti interfaces, enabling efficient FAL conversion.
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Advanced Energy Materials
·
2024
·
IF 24.4
Wenliang Feng,Chenchen Meng,Xiaolong Guo,Bin Wu,Xulei Sui,Zhenbo Wang
Na-ion hybrid capacitors (NICs) are known for their potential to integrate high power and energy density along with superior lifespan into a single energy storage device. However, the practical implementation of NICs is delayed due to their inadequate energy densities (<100 Wh kg −1 ), which is a result of the lack of anodes with rapid Na-ion diffusion kinetics to match the cathodes. To accelerate Na-ion diffusion kinetics, cobalt-doped TiO 2 (Co x Ti 1−x O y ) nanosheet anodes with reconstructed low-energy barrier channels for Na-ion transfer are designed. Crystal defects, including nanointerfaces, Ti interstitials, and oxygen vacancies, are intentionally introduced to the Co x Ti 1−x O y structure to improve its conductivity and induce pseudocapacitive-type Na-ion storage. Moreover, these crystal defects subtly alter the Na-ion transfer pathways in the bulk Co x Ti 1−x O y and reduce the energy barrier, as confirmed by density functional theory (DFT) simulations. Rapid Na-ion diffusion kinetics can minimize the kinetics discrepancy between anodes and cathodes, presenting great potential for achieving high-performance anodes for NIC applications. When integrated with activated carbon/reduced graphene oxide composite (AC/rGO) cathodes, the fabricated NICs demonstrate remarkable energy density (164 Wh kg −1 at 31 W kg −1 ), power density (8307 W kg −1 at 56 Wh kg −1 ), and an ultralong lifespan (83% capacity retention after 15000 cycles).
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ADVANCED MATERIALS
·
2019
·Vol. 31
·期 8
·1806095
·
IF 25.809
Wanpei Hu,Weiran Zhou,Xunyong Lei,Pengcheng Zhou,Mengmeng Zhang,Tao Chen,Hualing Zeng,Jun Zhu,Songyuan Dai,Shihe Yang,Shangfeng Yang
Titanium oxide (TiO 2 ) has been commonly used as an electron transport layer (ETL) of regular-structure perovskite solar cells (PSCs), and so far the reported PSC devices with power conversion efficiencies (PCEs) over 21% are mostly based on mesoporous structures containing an indispensable mesoporous TiO 2 layer. However, a high temperature annealing (over 450 °C) treatment is mandatory, which is incompatible with low-cost fabrication and flexible devices. Herein, a facile one-step, low-temperature, nonhydrolytic approach to in situ synthesizing amino-functionalized TiO 2 nanoparticles (abbreviated as NH 2 -TiO 2 NPs) is developed by chemical bonding of amino (-NH 2 ) groups, via Ti N bonds, onto the surface of TiO 2 NPs. NH 2 -TiO 2 NPs are then incorporated as an efficient ETL in n-i-p planar heterojunction (PHJ) PSCs, affording PCE over 21%. Cs 0.05 FA 0.83 MA 0.12 PbI 2.55 Br 0.45 (abbreviated as CsFAMA) PHJ PSC devices based on NH 2 -TiO 2 ETL exhibit the best PCE of 21.33%, which is significantly higher than that of the devices based on the pristine TiO 2 ETL (19.82%) and is close to the record PCE for devices with similar structures and fabrication procedures. Besides, due to the passivation of the surface trap states of perovskite film, the hysteresis of current–voltage response is significantly suppressed, and the ambient stability of devices is improved upon amino functionalization.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zihan Huang,Zhixuan Zhang,Yifeng Han,Liya Rong,Hongling Yao,Changwen Li,Xianbao Wang,Tao Mei
The practical application of high-performance lithium‑sulfur batteries (LSB) was primarily hindered by polysulfides shuttling and sluggish sulfur redox kinetics. To overcome these limitations, this study introduces a multifunctional three-phase heterostructured TiO 2 /ZnS@MXene catalyst engineered to synergistically combine high adsorption capacity and strong catalytic activity. The TiO 2 component, known for its' strong chemical affinity and ZnS, serving as an efficient electrocatalyst, were homogeneously anchored onto the highly conductive MXene substrate via in situ growth. Additionally, the MXene hollow microsphere structure effectively inhibited the self-stacking of lamellar host to ensure the maximum exposure of the active sites, providing a favorable buffer space for the volume expansion throughout the reaction process. The elaborately integrated TiO 2 /ZnS@MXene heterostructure provides a synergistic effect to realize the function of sequential capture-diffusion-transformation of sulfur species throughout the reaction process. As a result, the LSB containing TiO 2 /ZnS@MXene heterostructures could retain 821.7 mAh g −1 after 1000 cycles at 1C with only 0.010 % capacity decay per cycle. Even with a sulfur content of 5.8 mg cm −2 and lean electrolyte conditions (5.1 μL mg −1 ), it still delivers an area capacity of 4.1 mAh cm −2 at 0.2C.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jiming Zeng,Hanyu Shi,Qian Wang,Chengchen Wang,Yukun Wang,YaXin Zhou,Guobin Yang,Jun Li,Giuseppe Mele,Chen Wang
Photocatalytic water splitting for hydrogen production and the degradation of organic pollutants are regarded as promising strategies to address the current energy crisis and environmental issues. As a wide-bandgap metal oxide, TiO 2 is characterized by low catalytic activity and a narrow range of light absorption when used alone, whereas its combination with narrow-bandgap semiconductors has been shown to lead to a significant enhancement in catalytic performance. In this study, CdS–TiO 2 composites were synthesized via a ball-milling method, after which Pt–Pd nanoparticles were deposited by photodeposition. The noble metals were found to interact with CdS and TiO 2 respectively, while a synergistic catalytic effect between Pd and Pt was also observed. The photocatalytic efficiency was further extended by the formation of CdS–TiO 2 heterojunctions, resulting in a significantly enhanced hydrogen production rate of 4656.99 μmol h −1 g cat −1 in the ternary system. Moreover, the composite demonstrated significantly enhanced performance in the photocatalytic reduction of 4-NP, The Pt–Pd NPs/CdS-Vo-TiO 2 photocatalyst achieved a 95.2 % conversion rate for 4-NP within 2 min, also demonstrating high photocatalytic activity.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 26
·1-16
·
IF 2.8
Wei Qian,Zheng Meng
Microplastics (MPs) pose significant environmental and health risks, and conventional disposal methods often suffer from inefficiency and potential ecological harm. Photocatalytic degradation has emerged as a promising solution. However, traditional TiO 2 -based photocatalysts are limited by high electron–hole recombination rates, narrow visible light absorption, and poor reusability. In this study, we develop and optimize a Fe 3 O 4 @TiO 2 /Ag nanocomposite for the efficient degradation of polyethylene (PE) MPs with facile recovery. The synergistic integration of Fe 3 O 4 and Ag with TiO 2 enhances visible light absorption and mitigates charge carrier recombination. Notably, the Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits a degradation efficiency of 15.54%, outperforming Fe 3 O 4 @TiO 2 (12.63%) and pristine TiO 2 (1.15%). Moreover, the composite maintains its performance over five consecutive cycles, underscoring its durability. The degradation efficiency of Fe 3 O 4 @TiO 2 /Ag was further optimized using response surface methodology. Overall, the developed Fe 3 O 4 @TiO 2 /Ag nanocomposite exhibits excellent photocatalytic efficiency, magnetic recoverability, and long-term stability, highlighting its potential for practical applications in mitigating microplastic pollution.
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