Nanomaterials
·
2021
·Vol. 11
·期 5
·1335
·
IF 5.076
Zhengpeng Yang,Xiaoting Lv,Xuqing Liu,Shengmin Jia,Yongyi Zhang,Yingying Yu,Chunjing Zhang,Dandan Liu
Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO2nanowire film (SCTF) with superior flexibility (180° bending), high tensile strength (75–82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 µm in diameter, as well as a homogenous distribution of TiO2nanowires with an average diameter of ca. 500 nm, could act as a “waterway” for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min−1. The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.Keywords:sieve-like CNT film;TiO2nanowire;continuous-flow device;photodegradation;pollutant
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2019
·
IF 3.192
Yutang Kang,Shihui Jiao,Yue Zhao,Zhenwei Zhang,Boran Wang,Guangsheng Pang
A stainless steel mesh supported TiO 2 nanowires membrane is prepared by heating hydrogen titanate nanowires deposited on stainless steel mesh. The stainless steel mesh supported TiO 2 nanowires membrane exhibits superhydrophilic and underwater superoleophobic property. The water contact angles in air of the stainless steel mesh supported TiO 2 nanowires membrane is 0° and the underwater oil contact angles (gasoline, n-hexadecane, hexamethylene and methylbenzene) are >150°. Both of surfactant-free oil-in-water mixtures and surfactant-stabilized emulsions are separated with a high permeation flux of >10 6 L m − 2 h − 1 bar − 1 and a separation efficiency of >99.1%. The stainless steel mesh supported TiO 2 nanowires membrane exhibits good resistant to fouling, and the possible organic pollutants are easy to be removed by heat treatment and the superhydrophilic and underwater superoleophobic property is recovered.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xiangyu Wang,Anqi Wang,Mengyang Lu,Jun Ma
Novel ternary nanocomposite based on nano zero-valent iron (nZVI) and graphene-TiO 2 nanowires (Fe@GNW) was successfully synthesized for both reduction and photocatalytic oxidation of metronidazole (MNZ). Fe@GNW exhibits synergetic effects and significant properties, such as facilitating the photogenerated charges separation, enhancing the surface activity of nZVI, improving the adsorbent ability of catalyst, possessing the magnetic property for facile recycling. Due to the formation of micro-graphene-nZVI batteries and heterogeneous photo-Fenton system, Fe@GNW showed a superior activity in removal of MNZ (99.3%) compared with TiO 2 nanowires (43.0%) and graphene-TiO 2 nanowires (67.6%). Moreover, Fe@GNW retained excellent stability without apparent loss in catalytic activity after five cycles. MNZ removal by Fe@GNW experienced a two-stage process of reduction-adsorption and photocatalytic oxidation, which could be well-described by a revised pseudo-first order kinetics. The decomposition pathways of MNZ were proposed based on the analysis of intermediates. The quenching tests demonstrated that h + and OH are responsible for MNZ decomposition. New insights into the mechanism of the enhanced reduction and photodegradation of MNZ were proposed.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 12
·1637-1646
·
IF 8.683
Zeju Zhang,Lili Chen,Yanhui Zhao,Jielei Huang,Chenfeng Ding,Chunlei Liu,Yaochun Liu,Xiaofen Hong,Yuan Liu,Chunzhao Liu
Three-dimensional (3D) TiO2 hierarchical micromaterials assembled using high-aspect-ratio nano building blocks have exhibited many unique features of good structural stability, efficient mass transport/charge transfer properties and excellent light harvesting capability, which enable them to be successfully used for photocatalysis application. However, synthesis and structural control of the nano-/micro-materials pose serious challenges in materials design, such as requiring complex and time-consuming procedures, and harsh reaction conditions. Herein, we develop a simple wet-chemistry method combined with stirring procedure to construct new nanowire-assembled TiO2 submicron fibers with hierarchical structures. Results suggest that the mechanical force-driven stirring process increases the diffusion and surface reaction rate of intermediate hydrated titanate nanocrystal growth in the solution phase, leading to the generation of long tortuous nanowires and thereafter the formation of a new 3D nanowire-assembled hierarchical structure. The final 3D TiO2 nanowire-assembled micromaterials have a relatively large surface area of 184 m−2 g−1 with abundant hierarchical pores, which create an ideal micro-reactor for promoting the degradation of 2,4-dichlorophenol and Rhodamine B under UV light. The good photocatalytic performance is attributed to the unique structure of the TiO2 hierarchical nano-micromaterials, including a hierarchical pore structure and a dual-phase-induced rich interface. This work presents a facile and cost-effective approach that is potentially competitive for scaling-up the production of novel TiO2 nano-micromaterials with desired porous hierarchy for advanced application.
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
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 35
·355201
·
IF 3.551
Xiaojing Lv,Xinjia Xu,Yujian Zhang,Dominic S Wright,Yongfu Zhang,Cheng Zhang
TiO2 nanowires with high transparency and good ion storage capacity were explored as the charge-balancing layers for assembling electrochromic devices (ECDs). Increase thickness of TiO2 nanowires layer lowers the driving potential of the entire ECDs accompanied with reduced potential at the EC layer electrode, which further leads to decreased optical contrast and switching speed of the ECDs. Meanwhile, it can be found that the EC layer electrodes possess larger charge densities than those of TiO2 nanowire electrodes during the electrochemical redox process of these ECDs. However, the intrinsic injection and extraction charge densities of each single electrode are similar, which appears that the intrinsic charge balance of EC layer and TiO2 nanowires electrodes play more important role in the cycling stability of the ECDs. ECD with an optimum thickness of the TiO2 nanowires layer exhibits good electrochromic properties in term of high optical contrast (∼45%), fast switching speed (3.23 s) and excellent cycling stability (which has nearly no decay after 5000 cycles). This study explores the effects of thickness of TiO2 Nanowires layer on electrode potentials and electrochromic properties of electrochromic devices (ECDs), providing a potentially new direction for the preparation of ECDs with good integrated performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2022
·
IF 3.574
Cunfang Zhang,Xinyan Zhang,Song Chen,Jianan Zhang,Shuaishuai Li,Xiaona Li,Toshiyuki Ikoma,Weiyi Chen
Novel silk fibroin-decorated TiO 2 nanowire microspheres were synthesized through in situ decoration of TiO 2 nanowire microspheres with silk fibroin. They exhibited a hierarchical and fibrous structure with a diameter of 400–500 µm and consisted of numerous nanowires with the diameter of 10–20 nm. After incubation with fibroblast L929 cells, they showed an enhanced biocompatibility due to the presence of silk fibroin in contrast to TiO 2 nanowire microspheres.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2017
·Vol. 19
·期 24
·15724-15733
·
IF 4.123
Qingqing Qiu,Ping Wang,Lingling Xu,Dejun Wang,Yanhong Lin,Tengfeng Xie
Anatase TiO2 nanowire (NW) films modified with inverted type-I CdS/CdSe core/shell structure QDs have been successfully prepared by the post synthesis ligand-assisted technique. Surface photovoltage (SPV), transient photovoltage (TPV) and transient photocurrent (TPC) measurements demonstrate that CdS/CdSe core/shell structure QD-sensitized TiO2 NWs electrodes favor photoexicited electron injection and charge transfer due to the special photo-electronic features of CdS/CdSe core/shell structure QDs. With a polysulfide electrolyte, the maximum conversion efficiency was 2.18% for CdS/CdSe QDs with the CdSe shell being 4.4 nanometers thick; a PCE of 0.07% for CdS QDs and a PCE of 0.63% for CdSe QDs were obtained under illumination at 100 mW cm−2. The results reveal that the CdS/CdSe core/shell structure QDs sensitized TiO2 NW electrodes have promising applications in solar cells.
研究领域:
材料科学
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光伏技术
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纳米科技
✓ 已验证
DOI
高影响因子
ANALYST
·
2017
·Vol. 142
·期 15
·2805-2811
·
IF 3.885
Zhen Wang,Min Cao,Lei Yang,Donghua Liu,Dacheng Wei
As a recently developed detection technique, photoelectrochemical (PEC) measurement has received extensive attention. However, owing to the lack of a comprehensive approach to engineer the photo-generated carriers, the performance is still limited. As an example, a significant use of PEC measurement might be in understanding the roles of glutathione in physiological and pathological processes. Here, we developed a new approach for engineering the photo-generated carriers with the aid of the synergic effect of self-doping, surface plasmon resonance, electrical field amplification effect, etc. Thus, a highly sensitive multicomponent PEC platform has been developed, in which Au nanorods are decorated on the surface of self-doped TiO2 nanowires, followed by surface receptor functionalization with hemin for capturing glutathione. The synergic effect effectively increases generation, separation and transfer kinetics of the photo-generated carriers, which can be further increased by using a mixture of Au nanorods with different aspect ratios to tune the absorption wavelength to the entire UV-visible region. As a result, this system exhibits a broad linear range from 10 nM to 17.5 μM and low detection limit down to 8.6 nM for detecting glutathione, about 1–2 orders of magnitude lower than most existing PEC sensors.
研究领域:
生物分析
·
医学检测
·
纳米材料科学
✓ 已验证
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 99
·期 10
·105572
·
IF 2.6
Gang Wang,Xinmiao Zhang,Xu Jiang,Jiang Li,Hongye Li,Jianqiao Song,Mengjing Jin,Jinyuan Zhou,Erqing Xie,Xiaojun Pan
The noble metal nanoparticles can improve the efficiency of photoelectric conversion via enhancement of light harvesting for the localized surface plasmon resonance (LSPR) effect. Here, TiO2 nanowires were constructed on carbon fiber cloth as a flexible photoanode for photoelectrochemical (PEC) ultraviolet (UV) photodetector. By decorated noble metal Ag nanoparticles on TiO2 nanowires, the photocurrent was improved from 35.9 μA cm−2 to 268.4 μA cm−2, and the rise and decay time were increased by 0.14 s and 0.12 s, respectively. Moreover, the recombination of photon-generated electrons and holes was also decreased in photoanode due to the Schottky barrier between Ag and TiO2. This work provided an approach to promote the performances of the PEC UV photodetector.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Yi Huang,Gen Zhu,Kun Zou,Fei Tian,Thakur Prasad Yadav,Hui Xu,Guohai Yang,Haitao Li,Lulu Qu
Membrane fouling has been a major challenge in the practical application of membrane technology for wastewater treatment and purification. In this study, a reusable membrane composed of g-C 3 N 4 @TiO 2 -nanowires modified graphene oxide (GO/CN@TNWs) was successfully fabricated through electrostatic interactions and a vacuum filtration-assisted self-assembly process. The as-fabricated membrane possessed higher photocatalytic activity than the pure TNWs under simulated solar light exposure, attributing to the introduction of GO with high absorption and carrier mobility, and the synergistic effects of TNWs and CN. Furthermore, the π-π stacking interactions between GO and organic pollutant molecules contribute to the excellent enrichment efficiency of GO/CN@TNWs membrane (98.77%) toward tetracycline hydrochloride (TCH). Room-temperature ESR studies indicate that the GO/CN@TNWs membrane can generate more superoxide radical, hydroxyl radical and hole species for photocatalytic degradation. Therefore, the GO/CN@TNWs membrane may be used for TCH removal from waste water and the excellent solar-light-driven photocatalytic performance endows GO/CN@TNWs membrane absorbents with recycling abilities for the realization of large-scale wastewater purification.
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
ACS Applied Nano Materials
·
2018
·
IF 0
Lili Yang,Yusi Peng,Yong Yang,Jianjun Liu,Zhiyuan Li,Yunfeng Ma,Zhang Zhang,Yuquan Wei,Shuai Li,Zhengren Huang,Nguyen Viet Long
Hydrogenation was discovered to be an effective method to improve the surfaced-enhanced Raman scattering (SERS) performance of semiconductor TiO2 and enhance its enhancement factor (EF) by at least 3 orders of magnitude. The TiO2 substrate hydrogenated for 3 h showed the most remarkable SERS activity with a detection limit of 1 × 10–7 M for R6G and an EF of 1.20 × 106, which can be comparable to the Ag substrate. The remarkable SERS activities can be attributed to the chemical enhancement mechanism dominated by the enhanced photoinduced charge transfer (PICT) process between R6G and the oxygen vacancy-containing partly amorphous black TiO2 NWs substrate, as well as the electromagnetic enhancement (EM) derived from the metal-like local surface plasma resonance (LSPR) of the hydrogenated randomly oriented TiO2 nanowires. The first principle based on the density functional theory has been applied to demonstrate the appearance of tailed electron energy state produced by hydrogenation and provide the reasonable explanation for an easier PICT process, a stronger light absorption, and the enhanced SERS performance of our hydrogenated TiO2 substrates. Another impressive fact was that the photodegradation capability of TiO2 was also evidently improved. After 14 cycles of detection-and-degradation of R6G molecules, the substrates can still maintain regenerative and remarkable SERS activity. Ultrasensitive SERS activity and self-cleaning performance were successfully integrated on the black TiO2 NWs substrate by hydrogenation. Moreover, our substrate exhibited the excellent signal reproducibility and the outstanding stability of antioxidation in atmosphere thanks to the protection of the surface amorphous layer.
研究领域:
材料科学
·
光催化
·
分析化学
✓ 已验证
产品关联
DOI
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Yuhao Zhao,Yuxuan Li,Yuze Dai,Ying Zhang,Min Jiang,Guangyuan Zhou
As a candidate of fossil-based poly(ethylene terephthalate) (PET), bio-based poly(ethylene 2,5-furandicarboxylate) (PEF) that could be converted from renewable resources has attracted attention from academia and industry. Here, we prepare a series of new type of PEF/TiO 2 NWs composites from 2,5-furandicarboxylic acid (FDCA), ethylene glycol (EG), titanium dioxide nanowire (TiO 2 NWs, diameter∼100 nm, length∼20 µm) and dipentaerythritol (Di-PE) via in-situ polymerization. The TiO 2 nanowires (0.5∼10 wt‰ based on PEF) and Di-PE (3 mol‰ based on FDCA) were added as fillers and extenders. TiO 2 nanowires were distributed in the PEF uniformly, shown by SEM. Compared with pure PEF, the T g and thermal stability of all nanocomposites got improved. And the impact strength of nanocomposites could reach 60 kJ/m 2 in contrast to brittle pure PEF. The UV-A and blue-light shielding of nanocomposites increased from 53 % to 98 % and 28 % to 86 %, respectively, and the nanocomposites still maintained good gas barrier properties. Moreover, the antibacterial activity of nanocomposites against E. coli had increased to 98 %, better than that of the PEF/Ag NWs composites. By uniaxial pre-stretching, the tensile modulus and the elongation at break were improved obviously, from 1840 MPa to 5466 MPa and 4 % to 54 % respectively with pre-stretching ratio increasing. Compared to the PET/TiO 2 NWs composites, the PEF/TiO 2 NWs composites shows batter thermal property and mechanical property. The PEF/TiO 2 NWs composites exhibit potential foreground in the packaging application.
研究领域:
材料科学
·
生物基材料
·
纳米技术
✓ 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）