JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Yaxiong Tian,Fangzhou Lu,Yun Wang,Ting Sun,Yuanli Liu
Heterogeneous materials combine the advantage of each component through the synergy effect to become promising electrode materials for lithium-ion batteries (LIBs). Designing heterojunctions with specific structures can better show their electrochemical performance. In this work, we fabricated VS 2 nanosheets perpendicular to the C/TiO 2 nanotube (VS 2 @C/TiO 2 ) composite with a “branch-leaf” structure by an electrospinning-carbonization-solvothermal method. Notably, the interior of the C/TiO 2 nanotube consists of small-sized TiO 2 nanoparticles , which guarantees high electrochemical reactivity. The presence of carbon not only accelerates charge transfer across the interface of carbon-TiO 2 but also serves as an anchor for the growth of VS 2 nanosheet by C S V bonding, thus enhancing the structural stability of the electrode. As anode for LIBs, the VS 2 @C/TiO 2 electrode exhibits a high reversible capacity of 748 mAh g −1 and 324.2 mAh g −1 at 100 mA g −1 and 1 A g −1 , respectively. This work highlights the unique “branch-leaf” design of VS 2 @C/TiO 2 , which offers a new prospect for developing high-performance heterogeneous electrodes for LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jingyou Yuan,Manoj Pudukudy,Tianding Hu,Yi Liu,Xiaofei Luo,Yunfei Zhi,Hongying Su,Lihong Jiang,Shaoyun Shan
The overuse of antibiotics triggered a serious environmental crisis, stimulating the development of feasible technologies for removing antibiotics from wastewater. Herein, a set of CeO x @C-TiO 2 composites with varying amounts of CeO x from 1% to 15% were synthesized and applied for the photodegradation of tetracycline (TC) for the first time. It was found that the composites exhibited excellent performance for TC removal by degradation and mineralization under visible-light irradiation. The uniform distribution of CeO x nanoparticles in C-TiO 2 permitted the surface contact of particles, enhancing their visible light absorption with a reduced band gap of 2.39 eV and electron-transfer efficiency through the formation of heterojunctions. The amount of CeO x played a predominant role in the photocatalytic properties. The 10% composite exhibited high removal rates of 99.1%, 98.2%, and 83.5% for 10, 20, and 40 mg/L TC, respectively. Characterization experiments proved that Ce mainly existed in its +3 and +4 valence states in the composites. The interchange of these two valence states accelerated the transfer of electrons and promoted the production of superoxide anion radicals and hydroxyl radicals responsible for TC degradation. These findings provide valuable guidelines for exploiting high-performance MOF-derived photocatalysts for the abatement of contaminants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 11
·1-13
·
IF 2.101
Hou Yanhui,Wang Yechen,Yuan Huili,Chen Hang,Chen Guowei,Shen Junhai,Li Liangchao
Heterogeneous photo-Fenton SiO 2 /Fe 3 O 4 /C@TiO 2 (SFCT) catalyst with a core-multishell structure and a diameter of about 550 nm was successfully prepared and was characterized by scanning electron microscopy (SEM), TEM, XRD, Raman, and Fourier transform infrared (FT-IR). The results illustrated that anatase TiO 2 coexisted with rutile TiO 2 , in which the anatase phase was the main crystal phase. In addition, the catalytic activity of SFCT catalyst had been evaluated in the catalytic degradation on p-nitrophenol (PNP). The influence factors on the PNP degradation, including SFCT component ratio ( m
SFC / m
TiO2 ), H 2 O 2 dosage, solution pH, and PNP concentration, had been investigated. And the contrast experiments about the photo-Fenton catalytic mechanism revealed that the SFCT-2 catalyst possessed a superior activity in the neutral environment due to the optimal activity matching between Fe 3 O 4 and TiO 2 , and it exhibited the stable catalytic performance after five successive recycles. Therefore, the SFCT-2 catalyst had a promising application for the photo-Fenton degradation of organic contaminant.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 1
·592-604
·
IF 2.993
Chen Jin,Wang Enqi,Mu Jiechen,Ai Bing,Zhang Tiezhu,Ge Wenqing,Zhang Lipeng
CNTs–C@TiO 2 composite with 3D networks as electrode has been synthesized for lithium ion batteries (LIBs)/sodium ion batteries (SIBs) by a traditional solvothermal process. The composites were characterized by scanning electron microscopy, field emission electron microscopy, X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The continuous 3D conductive networks, which consisted of acid-treated CNTs, provided numerous attachment sites for TiO 2 particles and carbon layers (similar to a shell) produced by the Ti 4+ -induced polymerization of ethylene glycol, thereby promoting electron and ion transfer. The composites contained 10.09 wt% CNTs (excellent conductor) and 12.75 wt% pyrolytic carbon. The Raman spectra confirmed the high degree of graphitization of the composites, and the improved conductivity resulted in outstanding electrochemical behavior. The electrochemical performance in the Li + /Na + storage of CNTs–C@TiO 2 composites was greatly enhanced, as revealed by this material’s outstanding capacity of 205 mA h g −1 at a current density of 0.1 A g −1 after 200 scanning cycles for LIBs and 148 mA h g −1 at 0.1 A g −1 over 100 cycles for SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 43
·435410
·
IF 3.551
Q Chen,Y F Yuan,S M Yin,M Zhu,G S Cai
Pomegranate-like C@TiO2 mesoporous honeycomb spheres have been synthesized through two simple steps: formation of TiO2 mesoporous honeycomb spheres and the coating of polypyrrole followed by carbonization. TiO2 mesoporous honeycomb spheres are of large specific surface area of 153 m2 g−1 and contain abundant mesopores, which leads to high electrochemical activity and good kinetic performance of TiO2. A layer of amorphous carbon shell with the thickness of 30–40 nm tightly encapsulates a TiO2 mesoporous honeycomb sphere, forming a novel pomegranate-like small sphere, which significantly improves electronic conductivity and structural stability of TiO2. Benefiting from the unique pomegranate-like structure, C@TiO2 mesoporous honeycomb spheres exhibit high specific capacity, stable long-term cycling performance and good rate capability as an anode material for lithium ion batteries (LIBs). After 500 cycles at 1 C, the discharge capacity still reaches 184 mAh g−1. The electrochemical performance is superior to pure TiO2 mesoporous honeycomb spheres and most of the reported high-performance TiO2-based composites. This work provides a new high-performance TiO2-carbon-based composite material for LIBs as well as a new valuable research strategy.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bai Jiang,Jianxun Shang,Faying Zhang,Na Li,Yan Wang,Zuming Hu,Junrong Yu
In order to face the challenge of achieving high-efficiency and lightweight wave absorption materials, we prepared the poly-m-phenylene isophthalamide (PMIA)/TiO 2 /Fe 3 C (PTF) composites with hollow structure by coaxial electrospinning and carbonization process. PMIA as the carbon source provided a three-dimensional (3D) conductive network, using TiO 2 and Fe 3 C to improve the impedance matching, reinforce the hollow structure, and increase the absorption mechanism of composites. Significantly, the minimum reflection loss (RL min ) value of optimal material is −58.1 dB at 14.88 GHz and the effective absorption bandwidth (EAB) of 6 GHz with the matching thickness of 2.3 mm, and the filling content is only 13 wt%. The excellent absorption property is maintained even after heating, immersing, and long-term use. This work provides the reference of hollow carbon nanofiber absorbers with excellent comprehensive properties and has more powerful practicability in a variety of environmental conditions.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zining Zhou,Meng Wei,Guangxing Yang,Wengbo Du,Feng Peng,Yueping Fang,Yingju Liu,Shengsen Zhang,Rongliang Qiu
Catalytic conversion efficiency from aqueous formaldehyde (HCHO) into hydrogen (H 2 ) on non-noble metal catalysts is much lower than that on noble metal catalysts. Modulating the electronic properties of non-noble metal-based catalysts has been demonstrated an effective approach to improve their catalytic performance. In this work, assisted by light irradiation, photoinduced electron-rich surface structure was designed for the thermal catalytic conversion of HCHO to H 2 . In detail, a heterostructure of CuNi@C composited with TiO 2 was obtained, in which TiO 2 can be photoexcited under light irradiation to provide photoinduced electrons onto the surface of CuNi@C. On the photoinduced electron-rich surface of the CuNi@C/TiO 2 heterostructure, the H 2 evolution rate reached 254.65 mmol h −1 g −1 , which was 1.88 times higher than that on CuNi@C. It is worth noting that the catalytic HCHO conversion efficiency outperforms the current reported non-noble metal catalysts for this reaction. Combining with density functional theory (DFT) calculations and experimental studies, it is concluded that the electron-rich CuNi@C dramatically reduced the activation energies of the dissociation of HCHO and H 2 O and accelerated the overall reaction rate.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Hualong Wu,Yanxia Zhao,Jiexi Wang,Xiaoyan Li,Kaimin Shih,Xuguang Li,Wei Liu
Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in China. The emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge production. Management and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental remediation. The present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO 2 composites as the anode materials for lithium-ion batteries (LIBs). It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO 2 was evaluated for LIBs. The experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO 2 composites with a high specific surface area, stable structural integrity, and excellent electrochemical properties that would facilitate Li + diffusion in long-term LIBs usage. The C/TiO 2 composites calcinated from the polytitanium sulfate-coagulated sludge at 800°C (N 2 ) exhibited the best electrochemical performance during the cycling tests (601 mAh/g at 100 mA/g after 200 cycles). The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO 2 composites for energy storage applications. This study provides a new way for the management and reuse of Ti-loaded waste-sludge.
研究领域:
环境科学
·
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Shipeng Ning,Xingliang Dai,Weiwei Tang,Qinglong Guo,Meng Lyu,Daoming Zhu,Wei Zhang,Haisheng Qian,Xiaxi Yao,Xianwen Wang
Sonodynamic therapy (SDT) is a promising strategy for tumor treatment that satisfies all requirements of penetrating deep-seated tissues without causing additional trauma. However, the hypoxic tumor microenvironment impairs the therapeutic effect of SDT. The synergistic treatment of oxygen concentration-dependent SDT and bio-reductive therapy has been proven to be an effective approach to improve the therapeutic efficiency of SDT by exploiting tumor hypoxia . Herein, a biomimetic drug delivery system (C-TiO 2 / [email protected] ) was successfully synthesized for combined SDT and hypoxia-activated chemotherapy, which was composed of tirapazamine (TPZ)-loaded C-TiO 2 hollow nanoshells (HNSs) as the inner cores and cancer cell membrane (CM) as the outer shells. C-TiO 2 HNSs coated with CM achieved tumor targeting via homologous binding. C-TiO 2 @CM as a nanocarrier loaded with TPZ in the presence of the trapping ability of CM and the special cavity structure of C-TiO 2 HNSs. Moreover, C-TiO 2 HNSs as sonosensitizers killed cancer cells under ultrasound (US) irradiation. Oxygen depletion during SDT induced a hypoxic environment in the tumor to activate the killing effect of co-delivered TPZ, thereby obtaining satisfactory synergistic therapeutic effects. In addition, C-TiO 2 @CM exhibited remarkable biocompatibility without manifest damage and toxicity to the blood and major organs of the mice. The study highlighted that C-TiO 2 / [email protected] served as a powerful biomimetic drug delivery system for effective SDT by exploiting tumor hypoxia. Statement of significance • C-TiO 2 @CM achieved tumor targeting via homologous binding. • C-TiO 2 hollow nanoshells could be used as a sonosensitizer and drug carrier for synergistic SDT and hypoxia-activated chemotherapy. • C-TiO 2 / [email protected] showed no obvious toxicity under the injection dose.
研究领域:
纳米技术
·
生物医学工程
·
癌症治疗
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jingtao Bi,Xin Huang,Jingkang Wang,Ting Wang,Hao Wu,Jinyue Yang,Haijiao Lu,Hongxun Hao
In this work, to simultaneously remove organic dyes and Pb(II) from wastewater, a series of magnetic Fe 3 O 4 @C@TiO 2 -nanotube composites were designed and successfully synthesized via a new facile oil-phase cyclic magnetic adsorption (OCMA) method. The structural properties of the synthesized composites were investigated by different characterization methods systematically. It was found that Fe 3 O 4 was uniformly deposited on the inner walls of TiO 2 nanotubes. Although a Type III band alignment was formed in the catalysts, Fe 3 O 4 @C@TiO 2 -nanotube composites exhibited enhanced light absorbing ability and enlarged absorption edge due to efficient separation of h + and e − , which was verified by UV–Vis (Ultraviolet–visible) and PL (Photoluminescence) spectra. Decontamination experiments of 1FeCTi showed that more than 98% of RhB and about 92% of Pb(II) ions could be removed through adsorptive removal in the dark equilibrium period and further elimination during the illuminating period. The pseudo-first-order model, L-H model and adsorption-reaction model were established to describe the adsorption of Pb(II) in the dark, photodegradation of RhB and further elimination of Pb(II), respectively. A four-step mechanism was proposed to describe the decontamination process of Pb(II) during the illuminating period according to the final forms of Pb (Pb δ1 , Pb δ2 , Pb 0 and PbO). Finally, it was found that the photocatalytic activity would be maintained in the recycle experiments due to the existence of 1FeCTi@PbO heterostructure.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2020
·
IF 2.906
Mengnan Nie,Lingling Wang,Zhihao Wang,Jielin Huang,Junwei Zhao,Xin Yu,Quanhui Guo
Nanostructured C–TiO 2-X microspheres were prepared by facile modified solvothermal method and employed as an efficient visible light photocatalyst for photocatalytic antibiotic elimination. The acetone as well as distilled water not only induced the high crystallization of nanostructured C–TiO 2-X microspheres, the formation of C–TiO 2-X nanodots , and oxygen vacancies , but also boosted the assembling of C–TiO 2-X nanodots into nanostructured microspheres. The photocatalytic performance of nanostructured C–TiO 2-X microspheres was evaluated by photocatalytic antibiotic degradation under visible light and Xe lamp irradiation. The prepared C–TiO 2-X microspheres showed highly improved visible light absorption, charge separation, and visible light photocatalytic activity . The visible light photocatalytic activity of nanostructured C–TiO 2-x -180 microspheres was approximately 3.14 times of commercial TiO 2 , which could be attributed to the construction of unique nanostructures , oxygen vacancies, and carbon doping for efficient solar light harvesting and utilization, the diffusion of degraded products, and charge separation. Besides, the detailed energy band structures , active species for visible light photocatalytic tetracycline degradation, and visible light photocatalytic mechanism of nanostructured C–TiO 2-X microspheres were also proposed in the work.
研究领域:
材料科学
·
环境科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Jingcheng He,Qingju Liu,Yumin Zhang,Xinbo Zhao,Genlin Zhang,Bin Xiao,Kaixin Fu
C–TiO 2 microspheres were prepared in situ through microwave-assisted solvothermal method followed by low-temperature heat treatment in this study. Different carbon content doping samples were obtained through different temperatures of heat treatment. The characterization results indicate that C–TiO 2 samples are exclusively composed of anatase crystallites, and also the interstitial carbon and the surface carbonate species are confirmed existed in the samples, which could significantly enhance the photocatalytic activity under visible light. When irradiated for 60 min under 5 W visible-light, the degradation efficiency of 40 mg/l methylene blue (200 mg catalyst) and 10 mg/l methyl orange (100 mg catalyst) can reach 92.59% and 98.42%, respectively, which is significantly higher than that of commercial titania P25 (5.74% and 24.53%, respectively). In addition, the sample exhibits excellent recyclability and stability, which might be considered as a novel and facil scheme for modification of titania photodegradation driven by visible light.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）