JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Shuai Liu,Tengyuan Gao,Chunjiao Hu,Siqi Li,Jingmei Li,Lulu Chen,Deye Qu,Jianlai Liu,Zixin Wang,Ang Zhou,Xiulong Li
Semiconductor photocatalytic antibacterial materials, an innovative and eco-friendly antibacterial technology, have been widely studied. This approach uses indoor light or sunlight as energy sources, showing high-efficiency, broad-spectrum antibacterial properties without drug-resistance or secondary pollution risks. In this research, ordered mesoporous TiO 2 was synthesized via the template method. Then, Bi ions were doped into TiO 2 to obtain the flower-shaped Bi 12 TiO 20 photocatalytic nanomaterial. This material is catalyzed by light for the first time, and its antibacterial efficacy against five bacterial strains ( E. coli, Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, and Candida albicans ) was analyzed. The results showed excellent bactericidal activity against bacteria and effective antifungal inhibition. XRD, SEM, EDS, and UV-Vis techniques characterized the photocatalyst's crystal structure, morphology, and optical properties to confirm their validity. It was confirmed that the nano-flower morphology enhanced absorption capacity and improved electron-hole separation and electron transport efficiencies. Toxicity tests verified the material's non-toxicity. The nanoflower-shaped photocatalytic antibacterial material developed has great potential for eliminating harmful microorganisms and can be applied in various environmental protection fields.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Hongxia Liu,Minggang Zhang,Zhipeng Jin,Hui Mei,Gangqiang Zhu,Longkai Pan,Laifei Cheng,Litong Zhang
Photocatalysis is recognized as one of the most promising techniques for environment purification. However, the inconvenient recovery of powder photocatalysts significantly impeded their practical applications. Immobilization of the photocatalysts on supports to form monolithic photocatalysts is an effective method to solve this problem. Herein, a monolithic photocatalyst Bi 12 TiO 20 /Bi 4 Ti 3 O 12 /SiOC is fabricated by growing optimal Bi 12 TiO 20 /Bi 4 Ti 3 O 12 S-scheme heterojunction onto 3D-printed porous SiOC support. On one side, S-scheme heterojunction facilitates the separation of photoinduced electrons and holes while retaining their strong redox ability. On the other side, the porous structure favors mass transport and improves light harvesting by reflecting the light several times. Under simulated solar light irradiation, the NO removal efficiency of the monolithic photocatalyst Bi 12 TiO 20 /Bi 4 Ti 3 O 12 /SiOC is 16.4 %. Furthermore, the composite has good stability and reusability, suggesting its great potential in practical application. The possible photocatalytic mechanism is proposed according to systematic experiments and density functional theory (DFT). This work provides a rational reference for constructing efficient photocatalysts for environmental purification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2019
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IF 5.439
Tao Wang,Xiqing Liu,Qiuyue Men,Changchang Ma,Yang Liu,Pengwei Huo,Yongsheng Yan
To completely utilize the high redox ability of photo-induced charge carriers. Here, a Z-scheme photocatalyst of TiO 2 QDs/Bi 12 TiO 20 (TBT) composites with TiO 2 QDs fragment attached to the surface of Bi 12 TiO 20 (BTO) was prepared and the photocatalytic activity was evaluated by degradation of gatifloxacin (GF). The optimal photocatalytic performance of TBT displayed 3 times higher than bare BTO. The improved photocatalytic performance was ascribed to the effective separation of the charge carriers between TiO 2 QDs and BTO via the direct Z-scheme heterojunction . Such a strategy for the construction of Z-scheme TBT composites for removal of organic pollutants, proving new insights into design photocatalyst.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 20
·14328-14336
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IF 2.993
Meng Alan,Xing Jing,Guo Wenlong,Li Zhenjiang,Wang Xiaomei
Porous composite nanofibers consisted of cubic Bi 12 TiO 20, and orthorhombic Bi 4 Ti 3 O 12 with pore size of 5–10 nm have been successfully synthesized by combining electrospinning with calcination for photodegrading methyl orange (MO). Calcination temperature has a great effect on the ratio of Bi 12 TiO 20 and Bi 4 Ti 3 O 12 and their morphology, which in turn affects the photocatalytic property of the products. MO was almost completely degraded over the as-prepared samples obtained under the optimizing calcination temperature of 500 °C after irradiating for 40 min under simulated sunlight. Besides, cycle and regeneration experiments show that the porous Bi 12 TiO 20 /Bi 4 Ti 3 O 12 composite nanofibers possess fine cycle stability and regeneration ability, after the regenerative photocatalyst was recycled twice, 91% of the MO was degraded. Based on the characterization results, the mechanism of the improvement in photocatalytic property of Bi 12 TiO 20 /Bi 4 Ti 3 O 12 composite nanofibers was also investigated, and h + played a major role in the photodegradation of MO. In addition, the as-prepared Bi 12 TiO 20 /Bi 4 Ti 3 O 12 composite nanofibers show a certain capacity of photocatalytic hydrogen production under the simulated sunlight. This work not only provides a porous fiber with good photocatalytic activity, but also provides a reference for the preparation and performance study of other fibers.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Jinyang Liu,Qiqi Liao,Chengcai Li,Xueliang Jiang,Jiuming Li,Wangyong Jin,Guojin Liu,Yuhai Guo,Bin Yu,Hailin Zhu
Being a low-energy, reusable, and environmentally friendly degradation technology, photocatalysis has excellent application prospects in textile dye wastewater degradation. In this study, we combine the advantages of photocatalysis and membrane technology to prepare photocatalytic membranes that immobilize the photocatalyst and alleviate membrane pollution. Dual-precursor graphitic carbon nitride (U6M1) was composited with Bi 12 TiO 20 (BTO) using the annealing method to prepare a novel Δ(Z + II)-type BTO/U6M1 photocatalyst with visible-light response capacity. Subsequently, BTO/U6M1/PES composite photocatalytic membranes were fabricated using the nonsolvent-induced phase separation (NIPS) method, and the photodegradation activity of the composite membranes was executed against rhodamine B (RhB) dye. The results indicated that the composite membrane exhibiting the best photocatalytic performance achieved nearly 100 % degradation of RhB within 120 min. Furthermore, the membrane with optimal photocatalytic performance retained photocatalytic activity for five consecutive dye degradation tests, demonstrating its reusability.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2016
·Vol. 18
·期 38
·26530-26538
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IF 4.449
Chun Du,Donghai Li,Qinyu He,Junming Liu,Wei Li,Guannan He,Yinzhen Wang
Hybrid Bi12TiO20/Bi4Ti3O12 composites with different Bi : Ti molar ratios were successfully fabricated using a one-step solid-state calcination. These samples were characterized using X-ray diffraction, specific surface area analysis, scanning electron microscopy, high-resolution microscopy, selected-area electron diffraction, X-ray photoelectron spectroscopy, UV-vis diffuse reflection spectroscopy, photoluminescence analyses, and photocurrent and electrochemical impedance spectroscopy. Some specified techniques were also used to investigate the photocatalytic properties and the formation of radical species under UV-vis irradiation. The composites provide an efficient pathway for photo-produced electrons and holes to diffuse and transfer to the exterior of the particles for photodegradation, because of the good contact between hybrid Bi12TiO20 and Bi4Ti3O12. Therefore, the hybrid Bi12TiO20/Bi4Ti3O12 can prolong the carrier lifetime as compared to any individual material (Bi12TiO20 or Bi4Ti3O12). In particular, the hybrid Bi12TiO20/Bi4Ti3O12 composite with a Bi : Ti ratio of 12 : 6 had the longest photo-generated carrier lifetime and produced the maximum amount of hydroxyl radicals during UV-vis irradiation; therefore, it demonstrated the best photo-catalytic properties. A Z-scheme mechanism was proposed to explain the hydroxyl radical yield and photodegradation.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Materials Today Sustainability
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2024
·
IF 7.1
Meixuan Wu,Ruifu Chen,Yingying Xu,Yaning Zhang,Pengfei Sun,Xiaoping Dong
In recent years, friction-induced tribocatalysis has garnered significant attention in the fields of environmental pollution and clean energy utilization. Despite its efficacy in converting mechanical energy into chemical energy, the degradation process is time-consuming, which limits its practical applications. In this study, we optimized the morphology of Bi 12 TiO 20 catalyst and employed the most active Bi 12 TiO 20 combined with four kinds of triboelectric polymer powders to form an efficient friction pair that enhances the tribocatalytic efficiency for organic pollutant degradation. The amount of polymer added, stirring rate, number and shape of stirring bars, as well as the materials of stirring bars and beakers were investigated. The recycled tribocatalyst exhibited recyclability and stability in degrading organic pollutants. The hydroxyl and superoxide radicals were quantitatively determined, and the generation and mechanism of positive and negative charges in the process of tribocatalysis were analysed. The potential mechanisms underlying charge generation during tribocatalysis were investigated, while also exploring the degradation pathway of Rhodamine B through high-efficiency tribocatalysis.
研究领域:
环境科学
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材料科学
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化学工程
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催化
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 17
·24943-24952
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IF 5.532
Chang-bin Tang,Ping Huang,Zilong Liu,Dashi Lei,Juanqin Xue
In order to effectively reduce the high recombination rate of photogenerated carriers when Bi 12 TiO 20 (BTO) was excited by visible light , Ti 3 C 2 T x /BTO/fluorine-doped tin oxide photoanodes were conveniently prepared with the aid of mechanical coating by gentle ultrasonic mixing. Systematic characterization and the degradation of methylene blue in a photoelectrochemical cell were performed. The results showed that the Ti 3 C 2 T x /BTO composite exhibited a strong light absorption ability and the effective separation of photogenerated carriers. The optimal anode (6 wt% Ti 3 C 2 T x /BTO) degraded 85.4% of methylene blue within 120 min at an applied electric field of 1 V, with a reaction rate that was 3.5 times that of BTO. It was proved that Ti 3 C 2 T x , as a useful co-catalyst, creates an internal electric field at the contact interface with BTO and an external electric field, which are responsible for the enhanced photoelectrocatalytic degradation capacity of the composite anode materials .
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DOI
高影响因子
MATERIALS TECHNOLOGY
·
2016
·
IF 1.442
J. F. Ren,J. Z. Li,Z. W. Song
Bi12TiO20 nanostructures were prepared in an ionic liquid (1-methyl-3-butyl imidazole bromide, [BMIM]Br)–water solvent mixture through a hydrothermal process. The effect of ionic liquid on the morphology, optical and photocatalytic properties of the products was investigated. By slightly adjusting the amount of [BMIM]Br, Bi12TiO20 nanoparticles, nanorods and raft-like ones with different crystallinities, surface areas and bandgap energies could be obtained. In these three kinds of morphologies, Bi12TiO20 nanorods with average diameter of 20–30 nm and length of 100–270 nm demonstrate the highest photocatalytic performance for its degradation of methylene orange under visible-light irradiation. The results suggest that the presence of ionic liquid in the synthetic system plays a key role in tuning the phase composition, the shape, size and purity of Bi12TiO20 powders, and hence affects their morphology-associated optical adsorption ability and photocatalytic activity.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Hongxia Liu,Hui Mei,Shiping Li,Longkai Pan,Zhipeng Jin,Gangqiang Zhu,Laifei Cheng,Litong Zhang
Bismuth titanate (Bi 12 TiO 20 ) with unique sillenite structure has been shown to be an excellent photocatalyst for environmental remediation. However, the narrow light-responsive range and rapid recombination of photoinduced electrons-holes limit the photocatalytic performance of Bi 12 TiO 20 . To overcome the limitations, a practical and feasible way is to fabricate heterojunctions by combining Bi 12 TiO 20 with suitable photocatalysts. Here, using a facile chemical precipitation method, a novel and hierarchical core–shell structure of n-Bi 12 TiO 20 @p-BiOI (BTO@BiOI) heterojunction was rationally designed and synthesized by loading BiOI nanosheets on BTO nanofibers. The constructed BTO@BiOI composites exhibited significant charge transfer ability due to the synergistic effects of the built-in electric field between BTO and BiOI as well as close interfacial contacts. In addition, the narrow bandgap characteristics of the BiOI led to wide light absorption ranges. Therefore, the BTO@BiOI heterojunction exhibited an improved photocatalytic performance under visible light irradiation. The NO removal efficiency of optimal BTO@BiOI was 45.7%, which was significantly higher compared to that of pure BTO (3.6%) or BiOI (23.1%). Moreover, the cycling experiment revealed that BTO@BiOI composite has a good stability and reusability. The possible mechanism of photocatalytic NO oxidation over BTO@BiOI was investigated in detail.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2010
·
IF 5.252
Xiangqi Zhu,Jinlong Zhang,Feng Chen
Bismuth titanate (Bi 12 TiO 20 ) nanoparticles with spherical structures and good dispersion were synthesized hydrothermally using C 6 H 13 BiN 2 O 7 ·H 2 O and TiCl 3 in the presence of polyethylene glycol (PEG). Only 2 h of hydrothermal process was needed which means the whole process of preparation was a less power consumption. X-ray diffraction (XRD) proved that the samples were in pure cubic phase. UV–vis diffuse reflection spectra showed the band gap of Bi 12 TiO 20 is about 2.65 eV. Brunauer–Emmett–Teller (BET) analysis showed that the Bi 12 TiO 20 samples have higher surface areas. Visible-light-induced photodegradation of acid orange 7 (AO7) on Bi 12 TiO 20 was investigated. It was found that Bi 12 TiO 20 -assisted photocatalytic degradation of AO7 occurs via two processes: the photocatalytic process of Bi 12 TiO 20 semiconductor and the photosensitized process of AO7. Photocatalytic experiments in the presence of N 2 and the radical scavenger suggested that OH and O 2 − are two main active species in the whole degradation process.
研究领域:
材料科学
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光催化
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纳米材料
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环境化学
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半导体物理
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表面科学
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Tao Wang,Xiqing Liu,Donglai Han,Changchang Ma,Yang Liu,Pengwei Huo,Yongsheng Yan
In this work, two Bi-based semiconductors composites was synthesized through the BiVO 4 quantum dots (BVO QDs) was grown on the Bi 12 TiO 20 (BTO) via an in-suit growth with the ultrasonic method, which was more stability and evenly dispersed. As expected, the BVO-BTO composites exhibited increased visible-light-driven photocatalytic performance for photo-degradation due to the advantages of BVO QDs. Moreover, the possible mechanism of BVO-BTO composites was studied by trapping experiment, photocurrent, UV–vis and so on. The results demonstrated that the BVO QDs can widen the light response range to visible region and hasten the charge transfer and separation. Thus, the photocatalytic activity was enhanced through the BVO QDs decorated on BTO, which provided a new idea for designing Bi-based materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）