CHEMOSPHERE
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2022
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IF 8.943
Xilin Liao,Hai-Tao Ren,Baolei Shen,Jia-Horng Lin,Ching-Wen Lou,Ting-Ting Li
In this work, TiO 2 nanofiber membrane (NFM) with a complete surface microstructure was prepared through regulating the surface microstructure of TiO 2 NFM by doping Zr. The crystal structures and morphological analyses indicated that the nanofiber membranes were consisted by disordered accumulation of Zr-doped TiO 2 nanofibers with a crack-free surface, small grain size and high aspect ratio . When the doping amount of Zr was 0.8 mL, the tensile strength of the doped membranes reached 1.27 MPa, which was 60.7% higher than that of pure TiO 2 NFM. The photocatalytic performance of Zr-doped TiO 2 NFM was evaluated by the degradation performance of Methylene orange (MO) under simulated sunlight irradiation. Compared with the undoped TiO 2 NFM, the 0.8-Zr/TiO 2 NFM presented a higher catalytic degradation efficiency (improved by 69.6%), and the photocatalytic performance maintained stable after five circulating. It was found that the doping of Zr ions effectively limited the surface crack size and grain size of TiO 2 nanofibers, thereby improving the tensile strength, and enhanced the surface area effect and carrier transfer efficiency of TiO 2 NFM. On the other hand, a narrow band-gap was obtained by doping a small amount of Zr ions, which expanded the visible light response range to improve the photocatalytic performance of TiO 2 nanofibers.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
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2018
·Vol. 5
·期 11
·2631-2640
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IF 6.087
Yuting Cai,Jun Song,Xiaoyan Liu,Xia Yin,Xiaoran Li,Jianyong Yu,Bin Ding
TiO2-based heterojunction fibrous membranes with stable hierarchical nanostructures, excellent visible-light-driven photocatalytic activity, and easy-recycling ability would hold great promise in environmental remediation; however, it still remains a great challenge to construct such fantastic fibrous membranes. Herein, soft and hierarchical heterostructured BiOBr-anchored TiO2 nanofibrous membranes (BiOBr@TiO2 NFM) were fabricated by the sol–gel electrospinning technique combined with a facile successive ionic layer adsorption and reaction (SILAR) process. The well-crystallized BiOBr nanoplates with lamellar structure were uniformly grown onto TiO2 nanofibers, and the size and amount of BiOBr nanostructures could be finely regulated through rationally adjusting the growth cycles of SILAR. Benefiting from the large surface area, enhanced visible-light response, and intimately connected interfacial heterojunctions, the resultant membranes exhibited superior photocatalytic performance for rhodamine B (RhB) degradation under visible light irradiation, including a high degradation efficiency of 95.5% within 120 min and excellent reusability in 5 cycles. More importantly, the membranes still maintained good mechanical flexibility and structural integrity after utilization and could be directly extracted from solution. This study may provide a new strategy for the design and fabrication of soft hierarchical nanostructured TiO2-based fibrous membranes for environmental remediation and other potential applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Jun Song,Xiaohui Wu,Meng Zhang,Cheng Liu,Jianyong Yu,Gang Sun,Yang Si,Bin Ding
Functional semiconductor nanomaterials modified TiO 2 fibrous membranes with desirable heterostructures, good mechanical properties, and superior visible-light-driven photocatalytic activity would have broad applications in environmental remediation; however, constructing such fantastic fibrous membranes still remains an enormous challenge. Herein, we fabricated a soft and heterostructured g-C 3 N 4 @Co-TiO 2 (CNCT) nanofibrous membranes by a facile electrospinning approach and subsequent thermal polymerization process. The ultrathin g-C 3 N 4 nanoshell was in situ synthesized and uniformly wrapped onto Co-TiO 2 nanofiber to form core-shell quantum heterojunction , and the thickness and loading amount of g-C 3 N 4 nanoshell can be precisely controlled through simply regulating the content of precursor (melamine). Benefiting from the three-dimensional porous networks, enhanced visible-light response, and the effective charge transfer induced by uniform and compact heterojunction, the as-synthesized CNCT membranes exhibited a prominent photodegradation efficiency of 90.8% within 60 min towards tetracycline hydrochloride, and also displayed excellent antibacterial performance with a 6 log inactivation of E. coil after 90 min visible light exposure. Moreover, the stable core-shell structures and robust mechanical strength also endow the membranes with favorable reversibility and easy-recycling ability. This study may open up new avenues for designing and constructing flexible high-performance photocatalytic membranes for water purification.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Jiayu Zhang,Mingwei Yan,Guangchao Sun,Kaiqi Liu
A novel and cost-effective TiO 2 nanofiber membrane on porous fly ash ceramic as support (TNM-PFACS), using fly ash, graphite, and industrial rutile as raw materials, was successfully obtained based on the semi-dry press and hydrothermal process. The phase composition and micro-morphology of TNM-PFACS were characterized and analyzed by XRD, EDS, SEM, and TEM. Furthermore, it was discussed about simultaneous removal of heavy metal ions (Cu(II), Cd(II), and Cr(VI)) and rhodamine B, involving the adsorption and photodegradation process. The results indicated that the removal rate (90.15%) and adsorption capacity (9.56 mg/g) of Cu(II) was maintained, while the adsorption of Cd (II) was inhibited. In the photodegradation process, rhodamine B promoted the reduction of highly toxic Cr(VI) to Cr(III), and the highest removal rate of Cr(VI) reached 97.09%. TNM-PFACS presented simultaneous removal of heavy metal ions and rhodamine B through synergism and antagonism in the adsorption and photodegradation process, which can be applied as a simpler and cost-effective material in industrial wastewater treatment.
研究领域:
环境工程
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材料科学
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废水处理
✓ 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）