ELECTROCHIMICA ACTA
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2024
·
IF 5.5
Juxing Zha,Duyu Zheng,Yuanshuang Wang,Zelin Xie,Gang Wu,Jiqiu Qi,Fuxiang Wei,Qingkun Meng,Xiaolan Xue,Danyang Zhao,Yongzhi Li,Qing Yin,Changrui Jiang,Qihang Zeng,Yanwei Sui,Bin Xiao
Flexible Sn/TiO 2 carbon nanofiber (ST-NCF) composites were constructed by doping TiO 2 into tin-based carbon nanofibers via coaxial electrospinning. Sn/TiO 2 carbon nanofiber was directly used as an anode for Lithium-ion Batteries (LIBs) and Potassium-ion Batteries (PIBs), which show exceptional electrochemical performances. The layered sheath/core structure of the material lead to its good electrochemical properties, where the core Sn carbon nanofiber was encapsulated by the sheath layer of TiO 2 nanoparticles. In addition to enhancing its electrical conductivity, the outer TiO 2 and N-doped carbon fiber matrix also provide a buffer zone for volumetric strain during charging and discharging. The fiber core Sn and sheath TiO 2 form a heterojunction interface on the two-dimensional tube surface, which increases the diffusion rate of ions and electrons. After 100 cycles, TiO 2 -NCF and ST-NCF-40%TBT (40% TBT indicates the percentage of TiO 2 in shell solution to the total composition of shell spinning solution) show capacities of 386.6 mAh g −1 and 1336 mAh g -1 , respectively, at 0.5A g -1 . After 2000 cycles, ST-NCF-40%TBT in LIBs displayed a high capacity of 299 mAh g -1 at 10 A g -1 . After 350 cycles at 1A g -1 , the capacity of ST-NCF-40%TBT in PIBs is reserved at 307 mA h g -1 . Due to the superior mechanical flexibility of ST-NCF-40%TBT films, it will be a promising anode candidate for flexible LIBs and PIBs.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yanli Zhang,Jian Li,Jianyu Cai,Shuangye Li,Xing Fan,Liyun Song,Ruixue Guo,Jiasheng Liu
In this study, a series of γ-Fe 2 O 3 -modified V 2 O 5 -MoO 3 /TiO 2 (VMT) catalysts was prepared by wet impregnation method. The γ-Fe 2 O 3 -modified catalysts exhibited excellent catalytic performance, and 1.25 wt% γ-Fe 2 O 3 content improved the deNO x efficiency at 150 °C from 54% (unmodified VMT catalyst) to 84% (modified catalyst). BET, XRD, XPS, NH 3 -TPD, H 2 -TPR, and in situ DRIFTs were employed to characterize the physicochemical properties and reaction mechanisms of the catalysts. The introduction of γ-Fe 2 O 3 increased the V 5+ /V 4+ ratio, surface chemisorbed oxygen content, redox ability, and a number of acid sites in the prepared catalysts. XPS confirmed the addition of γ-Fe 2 O 3 introduced new charge transfer pathways (Fe 3+ /Fe 2+ ↔ V 5+ /V 4+ ). In situ DRIFTs suggested that the addition of γ-Fe 2 O 3 to the catalyst significantly increased the adsorption capacity of catalyst for NH 3 and NO x , while also exerting a strong activating effect on the adsorbed NH 3 . Furthermore, selective catalytic reduction over the VMT and 5PEG@1.25Fe-VMT catalysts followed the Eley-Rideal (E-R) mechanism. At temperatures above 200 °C, the 5PEG@1.25Fe-VMT catalyst also followed the Langmuir-Hinshelwood (L-H) mechanism.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jiaqi Chen,Yejun Chen,Jintao Shuai,Xuegang Chen,Dawei Zhang,Xi Lu,Xiangyu Fang,Binni Zou,Xue Yu,Feng Zhao,Wei Feng
The plasmonic effect enhances light absorption in semiconductor photocatalysts, while the noble metal-semiconductor interface promotes charge carrier transfer and separation, boosting photocatalytic activity. However, current methods for synthesizing metal-core TiO 2 -shell nanoparticles face challenges, such as keeping stable and preventing aggregation. This study presents a simple and moderate synthesis method for Au@TiO 2 core-shell nanoparticles, enabling precise control over the TiO 2 shell thickness and stable photocatalytic performance. Various characterization techniques were employed to assess the optical and structural properties of the synthesized Au@TiO 2 core-shell nanostructures. The results demonstrated that increasing the Au core concentration led to a gradual decrease in TiO 2 shell thickness. The adsorption properties and photocatalytic degradation efficiency of the synthesized Au@TiO 2 core-shell nanostructured catalysts were thoroughly examined, particularly focusing on their performance with methyl orange (MO) and methylene blue (MB). Au@TiO 2 achieved excellent adsorption performance for MO, with a maximum capacity of 231±6 mg/g. Furthermore, Au@TiO 2 exhibited higher photocatalytic degradation activity of both MO and MB than pure TiO 2 . The mechanism study indicated that it attributed to enhanced visible light absorption, reduced bandgap, and higher valence band energy. Additionally, the Au@TiO 2 catalysts showed good cyclic stability, making them promising for future applications. This research offers insights into designing efficient photocatalysts, addressing existing synthesis challenges, and contributing valuable references for future advancements.
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Zhiyu Zhang,Yanhong Guo,Fei Long,Xinyu Zhang,Jing Wang,Yong Ren
NO is a common harmful air pollutant which leads to various environmental and health problems and needs to be addressed urgently. Herein, by combining sol-gel method and microfluidic approach, we successfully developed novel hollow alginate microfibers containing CNT/TiO 2 photocatalysts. The resulting fibers, with diameter of 1000 μm and adjustable wall thickness of 60–150 µm, were confirmed through microscope and SEM. The formation condition about various flow rate ratios of different phases was also investigated. Subsequently, various characterization methods including XRD, FT-IR and XPS were employed to investigate structural properties of prepared CNT/TiO 2 hybrid materials. Our findings indicate that the boosted absorption ability towards the visible light region, improved photo-generated electron transfer efficiency, as confirmed by UV–vis spectroscopy and electrochemical impedance respectively, mainly account for the enhanced photocatalytic performance in NO oxidation. The optimized CNT(10 %)/TiO 2 microfibers exhibited the best NO removal efficiency of 44.3 % under visible light, which is 1.59 times that of the pure TiO 2 . This study represents an interesting case for the combined preparation of CNT/TiO 2 /alginate microfibers for NO abatement.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 29
·期 2
·1269-1279
·
IF 2.019
Hu Liang,Xia Yuting,Wang Qianqian,Yang Hui,Zhang Qi-long
In this work, a core–shell dendritic CuO@TiO 2 was constructed through a two-step chemical method. Structural analysis confirms the successful coating of TiO 2 on the CuO and the dendritic morphology was maintained after the coating process. The composites were prepared by using ferroelectric P(VDF-HFP) as matrix and synthesized particles as filler. The introduction of fillers influences the melting and crystallization process of the polymer matrix without altering the composition. The insulator layer suppresses the conductivity and dielectric loss by blocking the charge carriers while the composites exhibit improved dielectric constant in the frequency wide range of 10 2 –10 6 Hz and enhanced thermal conductivity. The composite with 20% CuO@TiO 2 exhibits a high dielectric constant of 51.7, low loss of 0.11 at 1 kHz and high thermal conductivity of 0.382 W/mK, showing huge potential for dielectric applications.
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高影响因子
Food Packaging and Shelf Life
·
2025
·
IF 10.6
Kai Cheng,Fengfeng Xu,Jin Du,Changfeng Li,Zengkai Wang,Liwei Zhang,Xueqin Wang,Jun Liu
This study focuses on developing a tough, biodegradable film made from soy protein isolate (SPI) and carboxymethyl chitosan (CMCS), enhanced with titanium dioxide nanotube arrays (TNTAs). The main objective was to improve the hydrophobicity, mechanical strength, and thermal stability of SPI/CMCS films by incorporating TNTAs, making them suitable for food packaging, particularly in preserving high-moisture fruits like blueberries. The TNTAs were synthesized using anodic oxidation and integrated into the SPI/CMCS matrix through a solution-casting method. The resulting films exhibited enhanced mechanical properties, including higher tensile strength and better water resistance, without compromising biodegradability. Additionally, the SPI/CMCS/TNTAs composite films effectively maintain blueberry quality and extend their shelf life. These results suggest that SPI/CMCS/TNTAs films are promising candidates for sustainable and effective food packaging applications.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Yaxi Tan,Kuanjun Fang,Weichao Chen,Qi Shi,Chunming Zhang
A superhydrophobic cotton fabric with unidirectional moisture transfer ability, antibacterial, and oil-water separation capabilities was fabricated by combining a simple coating method and oxygen plasma etching. Polydimethylsiloxane (PDMS) was employed to impart low surface energy to the cotton fabric, thereby endowing it with hydrophobic characteristics. The synthesized quaternized chitosan/TiO 2 /Ag (CTA) compound was subsequently applied onto the cotton fabric surface to introduce a desirable level of surface roughness, thus enhancing its hydrophobic properties and conferring excellent antibacterial efficacy. The cotton was subsequently treated by oxygen plasma to trigger asymmetrical wetting on both sides. The experimental findings reveal that the optimally treated cotton fabric exhibits hydrophobic properties on the bottom surface, with a water contact angle (WCA) reaching 162.8°, while the upper surface displays hydrophilic behavior, establishing a wetting gradient along the thickness direction. Notably, even under the influence of reverse gravity, water droplets are capable of transferring from the back to the top surface within 2 s, while preventing reverse penetration of liquid. Moreover, the synthesized compound CTA endows the cotton fabric with efficient and long-lasting antibacterial properties through two modes (contact and release sterilization modes) and three sterilization mechanisms (electrostatic interaction, plasma surface resonance effect, and reactive oxygen species). Remarkably, within a time frame of only 1 h, the modified cotton fabric is able to achieve a kill rate exceeding 99% against Escherichia coli and Staphylococcus aureus . Moreover, the aforementioned properties demonstrate outstanding durability against repeated washing, continuous abrasion, exposure to strong acid/base, and ultraviolet radiation. Additionally, this modified cotton fabric exhibits remarkable efficiency in terms of oil-water separation, effectively separating both light and heavy oil from water. It is worth noting that the preparation process is cost-effective, environmentally friendly, and free from fluorine.
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高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jiawei Lei,Zhihao Zhao,Qian Wu,Hongmei Lu
It is challenging to have comprehensive spatial lipidomic analysis by mass spectrometry imaging (MSI) due to the strong ion suppression and peak interference from high-abundance polar lipids to low-abundance poorly ionizable lipids. In this work, we proposed a new MSI approach via ambient liquid extraction techniques assisted by a new mixed-mode adsorptive material, graphene oxide (GO)/TiO2 nanocomposite. The material combines chelation affinity from TiO2 and hydrophobic interaction from GO. By finely tuning the adsorption solvent as 9% H2O–6% ammonia–85% methanol/acetonitrile (1:1, v/v), simultaneous enrichment of poorly ionizable glycolipids and glycerides with separation from high-abundance phospholipids was achieved on the material. In 10 mg/mL glucose–6% ammonia–94% methanol, all of the adsorbed glycolipids and glycerides could be desorbed from the material efficiently. Then, GO/TiO2 nanocomposite was coated onto the sample plate for thaw-mounting the tissue section, and ambient liquid extraction probe was used to have pixel-to-pixel desorption of the lipids on the section in two steps with the above two solvents. The results show that most of the phospholipids were imaged in the first step MSI, and glycolipids and glycerides were selectively imaged in the second step MSI, largely reducing ion suppression and peak interference. Compared with direct ambient liquid extraction MSI, much more glycolipid species (22 vs 9), glyceride species (10 vs 5), phosphatidylethanolamines (11 vs 3), and lysophospholipids (12 vs 2) were detected via GO/TiO2 nanocomposite-assisted two-step MSI. The ion images of most lipids show much higher signals and imaging quality with the new method than with the traditional method. Thus, comprehensive enhancement of lipid coverage in MSI by on-tissue separation was achieved here for the first time, providing more information about spatial lipidomics studies.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chengmei Sun,Chengcheng Xu,Wenzhen Ren,Fengya Hu,Jun Yuan,Qingru Wang,Yanru Xie,Kai Wang,Dong Zhang
ZnTiO 3 :Eu 3+ ,Mn 4+ phosphors with hexagonal and cubic structure are synthesized by solvothermal method. The structure of ZnTiO 3 depends on precursors and the annealing temperature. Inverse spinel Zn 2 TiO 4 phase reveals the highest thermostability compared with cubic ZnTiO 3 and hexagonal ZnTiO 3 phases. The different phases of ZnTiO 3 crystals exhibit different photoluminescence properties. The forbidden transition of 4 A 2 g → 2 T 2 g for Mn 4+ is observed in Zn 2 TiO 4 and hexagonal ZnTiO 3 (h-ZnTiO 3 ) due to the decreased symmetry. The zero photon line (ZPL) assigned to 2 E g → 4 A 2 g transition of Mn 4+ is absent in all type ZnTiO 3 phases. A sharp emission peak at 714 nm assigned to ν 6 (Stokes emission) mode of Mn 4+ in h-ZnTiO 3 is present when the temperature was below 270 K, and increases sharply in intensity with the temperature decreasing. The similar PL spectra of cubic ZnTiO 3 and Zn 2 TiO 4 co-doped with Eu 3+ and Mn 4+ show a wide emission band composed of Stokes and anti-Stokes modes. The calculated nephelauxetic parameter increases from 0.84 to 1.03 and 1.18 for Mn 4+ in h-ZnTiO 3 , cubic ZnTiO 3 and Zn 2 TiO 4 , respectively, indicating the covalency decreasing, which causes the red shift of ZPL in h-ZnTiO 3 . The Mn 4+ emissions show stronger temperature dependence than that of Eu 3+ , especially for that in h-ZnTiO 3 matrix. Based on the fluorescence intensity ratio between I Eu 3+ and I Mn 4+ , the highest relative temperature sensitivity of 2.46 %K −1 is observed in cubic ZnTiO 3 (c-ZnTiO 3 ) and Zn 2 TiO 4 . Under the excitation at 550 nm, the highest relative sensitivity of 2.9 %K −1 is achieved in c- and h-ZnTiO 3 mixed phases.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Junhao Cai,Yaru Peng,Po Hu,Yuan Zhou,Qiaoge Yao,Hao Lyu,Youtang Gao
The light absorption, active sites, and charge carriers separation of photocatalysts are extremely important factors in the field of photocatalysis. Near-perfect lattice-matched homojunction constructed using disorder engineering and doping strategies is an effective strategy to improve photocatalytic activity. Herein, we developed crystalline TiO 2 nanoparticles (NPs) and Ti 3 C 2 T x MXene-derived C-doped amorphous TiO x homojunction (TCT) at room temperature. In this homojunction, TiO 2 NPs are evenly distributed on the surface of the C-TiO x nanosheet to form a type-II structure, which promotes the separation of photogenerated carriers. The light absorption range of TCT extends to 550 nm due to the presence of intermediate energy levels in C-TiO x , which increases its photon absorption capacity. Moreover, TCT possesses a large number of oxygen vacancies, which are beneficial for improving the adsorption and degradation of pollutants. These characteristics of TCT could significantly improve its photodegradation performance for tetracycline. Interestingly, the precursor mass ratio of TCT with the best degradation efficiency is different under different illumination conditions, which is attributed to the different band gaps of C-TiO x and TiO 2 NPs resulting in different light absorption ranges. This work provides a new approach to rationally designing crystalline and amorphous homojunction for photocatalytic applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yunfei Xu,Ying Li,Yongjian Wei,Haiou Liang,Tong Xu,Yinghui Sun,Jie Bai
Photothermal synergistic catalysis of Suzuki-Miyaura coupling reaction not only utilizes the solar energy efficiently, but also reduces the energy consumption. It is a green organic synthesis method for constructing C–C bonds, which has a wide application. In this work, we constructed a PdO/g-C 3 N 4 /TiO 2 bilayer tubular structure material with a heterojunction structure by a simple and effective method. The catalyst exhibited efficient photothermal synergistic catalytic performance in Suzuki coupling reaction under visible light irradiation. The influence of the catalyst’s structure, morphology, composition, and photothermal response on the Suzuki coupling reaction were discussed based on a series of characterizations and activity test of the catalyst. The results showed that the PdO/g-C 3 N 4 /TiO 2 catalyst contained an effective g-C 3 N 4 /TiO 2 heterojunction structure. Under visible illumination, the differences in interfacial charge concentration and electron affinity between these two different types of semiconductors lead to charge rearrangement and transfer, which greatly improves the carrier separation efficiency. Meanwhile, palladium metal exhibits excellent electron deposition effects, both as an active metal center for SMC reactions and as an electron acceptor for facilitating photoelectron transfer. Electron-rich palladium atoms play an important role in C–C bond formation reactions, improving catalytic efficiency. The PdO/g-C 3 N 4 /TiO 2 catalyst has excellent catalytic activity and can catalyze the SMC reaction under visible light and at 0 ℃, the yield reached 85.6%, which is comparable to the activity of thermal catalysis for 15 minutes. Furthermore, after five cycles, the PdO/g-C 3 N 4 /TiO 2 catalyst still maintained an 83.1% yield, demonstrating excellent cycle stability. This article offers an effective strategy for preparing heterojunction catalyst with visible light response for photothermal reaction and presents the potential of these catalysts as a way to improve the efficiency and sustainability of Suzuki coupling reactions.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 31
·e55738
·
IF 2.7
Liangyong He,Yuqing Yang,Bin Yang,Weiqiang Hu,Zhengzhi Zheng,Tianyu Lu,Haijia He,Jiasheng Qian,Yaoyang Chen,Weiguo Zhang,Yuchao Ke
In recent years, optical diffusion film materials with high transmittance and high haze have been widely reported, while there is relatively rare research on their functionalization and practical application especially in real scenario. In this work, optical diffusion films using polymethyl methacrylate (PMMA)@TiO 2 @SiO 2 (P@T@S) composite microspheres were fabricated, which exhibited sufficiently high light transmittance and haze. The binding mode of PMMA microspheres and nanoparticles suggested that PMMA microspheres with a positive surface potential combined with nanoparticles with a negative surface potential through electrostatic attraction to achieve mutual binding. The prepared P@T@S composite microspheres showed better heat and swelling resistance than those of PMMA microspheres. The P@T@S diffusion film, whose excellent light diffusion effect was clearly demonstrated, exhibited the best optical performance among all optical diffusion films prepared. After passing through the P@T@S diffusion film, the laser light was not only uniform but also bright. The findings from this work can provide some insight into further research on optical diffusion films applied in optoelectronic device areas.
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高影响因子
危险品化学品经营许可证（带存储）