DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 35
·12130-12137
·
IF 4.099
Xiaofei Guo,Chuanxiang Qin,Mingyue Zhu,Jian-jun Wang,Jun Sun,Lixing Dai
A composite photocatalyst, with a BiOI/TiO2 heterojunction supported on carboxyl polystyrene spheres, was prepared using a two step hydrothermal reaction method. The products were characterized by X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results show that the polystyrene microspheres were covered with smaller-sized BiOI microspheres, while nano-sized TiO2 particles were deposited on the surface of the flower-like BiOI microspheres. As an internal electric field exists when BiOI is hybridized with TiO2, the photogenerated carriers could be separated effectively and the resulting composite photocatalyst PS/BiOI/TiO2 had better performance for degrading rhodamine B in aqueous solution under visible-light irradiation with a 40 W incandescent lamp than that of PS/BiOI. Meaningfully, the composite photocatalyst can be recycled easily by filtering.
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Ruyan Xie,Shuzhe Zhang,Yanhua Song,Xiaozhen Zhang,Shihou Sheng,Haifeng Zou
The optical properties of quantum dots are significantly influenced by photoactivation. However, the progress in the development of photoactivation carbon dot (CDs) is still stagnant. Herein, a method for preparing photoactivated CDs/NiFe 2 O 4 by introducing affluent defects onto the surface of CDs through modification with NiFe 2 O 4 , extremely filling the gap of photoactivated CDs is proposed. Interestingly, a fantastic fluorescence detection strategy in a unique “OFF-ON-OFF” mode, combined with Ag + -assisted fluorescence enhancement, to establish a dual-channel regulation mechanism for ultra-sensitive detection of Hg 2+ is first proposed. By increasing surface traps and non-radiative recombination, defect-induced manipulation on the surface of CDs creates favorable conditions for enhancing photoactivation capacity. Unexpectedly, the CDs/NiFe 2 O 4 shows a 25-fold enhancement in fluorescence intensity after exposure to UV-lamp. Compared to CDs/NiFe 2 O 4 , Ag + -assisted photoactivation CDs/NiFe 2 O 4 exhibits superior selectivity and sensitivity for Hg 2+ detection, with low detection limits of 0.7 nM. Moreover, TiO 2 @CDs/NiFe 2 O 4 catalyst is successfully prepared by anchoring CDs/NiFe 2 O 4 onto the surface of TiO 2 , which demonstrates efficient degradation of tetracycline within 90 min under visible light irradiation, with a degradation rate of 98.3%. This work first provides a novel defects modification strategy for developing highly active photoactivated CDs technology that is significant for future environmentally sensitive applications.
研究领域:
材料科学
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环境科学
·
分析化学
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DOI
高影响因子
Coatings
·
2019
·Vol. 9
·期 7
·421
·
IF 2.33
Lei Peng,Musong Lin,Sheng Zhang,Li Li,Qiang Fu,Junbo Hou
A self-healing coating with UV-shielding property was prepared in this paper. The self-healing property was based on the inclusion between a host (β-CD-TiO2) and a guest HEMA-Ad). After inclusion of the host and guest, the host–guest complex (HEMA-Ad/β-CD-TiO2) was polymerized with other reactive monomers (HEMA and BA) to obtain the final coating. The coating had good hydrophobicity (water contact angle >90°, moisture absorption rate <2%) and excellent UV-shielding performance (ultra-violet protect factor >90%), and could be firmly bonded to a soft substrate. In addition, the coating had good self-healing property, which means that cracks in the material can recover many times after being damaged and that the UV-shielding ability can be fully restored with the self-healing process.Keywords:coating;self-healing;UV-shielding;host–guest
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 8
·2512-2521
·
IF 2.659
Qi Jiang,Runliang Zhu,Yanping Zhu,Qingze Chen
Background Developing effective removal processes for antibiotics has attracted increasing interest recently. In this work, a novel strategy involving the combination of photocatalysis with Fenton reaction using ferrihydrite/TiO 2 (Fh/TiO 2 ) nanohybrids was developed to efficiently degrade the antibiotic cefotaxime. Fh/TiO 2 nanohybrids were synthesized by simply growing Fh on the surface of commercially available TiO 2 . We expected that Fh of Fh/TiO 2 could capture photo-generated electrons from TiO 2 , inhibiting the recombination of electron–hole pairs; also, by virtue of Fe(III)/Fe(II) cycle on Fh/TiO 2 , photo-generated electrons could be continually transferred to H 2 O 2 to produce ·OH. Accordingly, high degradation efficiency of cefotaxime could be achieved. Results With UV light and H 2 O 2 , Fh/TiO 2 with a Fe/Ti molar radio of 7% showed high catalytic activity indeed, and its degradation rate for cefotaxime was nearly three times higher than that of TiO 2 . The decomposition of H 2 O 2 and production of ·OH in the UV+7%Fh/TiO 2 +H 2 O 2 system were also increased markedly. The large amount of Fe(II) on 7%Fh/TiO 2 determined in this system supported our hypothesis that Fh of 7%Fh/TiO 2 could capture photo-generated electrons from TiO 2 . Although dissolved iron was observed, the contribution of Fenton reaction by dissolved iron was rather limited. After four consecutive cycles, 7%Fh/TiO 2 still retained good stability. Conclusions The UV+7%Fh/TiO 2 +H 2 O 2 system provides a potential alternative in degradation of cefotaxime for further practical application, and it has the following advantages: high catalytic activity, simple preparation method, good stability and low cost, as well as continued catalytic activity after total consumption of H 2 O 2 . © 2019 Society of Chemical Industry
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Penghao Hu,Zhuye Jia,Zhonghui Shen,Peng Wang,Xiaoru Liu
To realize application in high-capacity capacitors and portable electric devices, large energy density is eagerly desired for polymer-based nanocomposite. The core–shell structured nanofillers with inorganic buffer layer are recently supposed to be promising in improving the dielectric property of polymer nanocomposite. In this work, core–shell structured TO@BT nanoparticles with crystalline TiO 2 buffer layer coated on BaTiO 3 nanoparticle were fabricated via solution method and heat treatment. The thickness of the TO buffer layer can be tailored by modulating the additive amount of the titanate coupling agent in preparation process, and the apparent dielectric properties of nanocomposite are much related to the thickness of the TO layer. The relatively thin TO layer prefer to generate high polarization to increase dielectric constant while the relatively thick TO layer would rather to homogenize field to maintain breakdown strength. Simulation of electric field distribution in the interfacial region reveals the improving effect of the TO buffer layer on the dielectric properties of nanocomposite which accords with the experimental results well. The optimized nanoparticle TO@BT-2 with a mean thickness of 3–5 nm buffer layer of TO is effective in increasing both the ε and E b in the PVDF composite film. The maximal discharged energy density of 8.78 J/cm 3 with high energy efficiency above 0.6 is obtained in TO@BT-2/PVDF nanocomposite with 2.5 vol% loading close to the breakdown strength of 380 kV/mm. The present study demonstrates the approach to optimize the structure of core–shell nanoparticles by modulating buffer layer and provides a new way to further enlarge energy density in polymer nanocomposite.
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DOI
高影响因子
NANO
·
2025
·
IF 1.1
Xiangfei Wei,Hui Wang,Hongyan Wu
In this study, titanium oxide (TiO 2 ) has been considered as an electrochromic material with great potential due to its low operating voltage, fast switching time and other advantage. The electrochromic device based on amorphous TiO 2 (Glass/FTO/TiO 2 /Electrolyte/NiO/FTO/Glass) has been prepared, and the effects of the electrochemical and electrochromic performance of device are systematic explored by cyclic voltammetry. The electrochromic device at 450 nm shows the largest transmittance modulation of 78% and the largest coloration efficiency of 137.3 cm 2 /C. In addition, the prepared device exhibits the uniform coloring without defect during electrochromism, which indicates that it has great development value in energy-saving, smart-window and other fields.
研究领域:
材料科学
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电化学
·
光电子器件
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产品关联
DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Xiaoying Yu,Gala Sa,Aiju Xu
The coal chemical industry produces significant wastewater containing refractory organic pollutants, with quinoline being a particularly persistent contaminant in secondary biochemical effluents. To overcome the limitations of standard TiO 2 photocatalysts—specifically, their restricted light absorption range and rapid charge recombination—this work created Gd-doped TiO 2 (Gd-TiO 2 ) catalysts using a hydrothermal approach. Comprehensive characterization showed that the optimal 1.5 % Gd-TiO 2 presents three primary advantages: (1) a 55 % increase in specific surface area (174 m 2 g −1 ), (2) enhanced visible-light absorption through bandgap reduction (3.06 eV), and (3) improved charge separation. These modifications enabled the 1.5 % Gd-TiO 2 catalyst to achieve 84 % quinoline degradation within 3 h (mineralization rate: 53.2 %), maintaining 80.3 % efficiency after four cycles, demonstrating exceptional stability. Mechanistic studies revealed a hydroxyl radical-dominated degradation pathway involving sequential benzene-ring opening and pyridine-ring cleavage. This study presents a high-efficiency photocatalyst for industrial wastewater remediation and provides essential insights into rare-earth-modified TiO 2 systems.
研究领域:
环境科学
·
材料科学
·
光催化
·
化学工程
·
水污染治理
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
He Liu,Gaozhao Chen,Xiong Shen,Wentao Hao,Qiuyun Ouyang
To solve the toxicity and stability issues of traditional lead halide perovskites, Cs2AgBiBr6@TiO2 nanocomposites were synthesized via a thermal injection method. Cs2AgBiBr6 quantum dots (QDs) and Cs2AgBiBr6@TiO2 nanocomposites were dispersed in methyl methacrylate (MMA) to prepare (Cs2AgBiBr6)6/PMMA and (Cs2AgBiBr6@TiO2)6/PMMA organic glasses (OGs). The nonlinear absorption (NLA) properties of the materials were investigated using the open-aperture Z-scan technique, revealing that after compositing with TiO2, the reverse saturable absorption (RSA) coefficient of the (Cs2AgBiBr6@TiO2)6/PMMA OG increased from 194 cm GW−1 to 294 cm GW−1 at an energy of 10 µJ. This is attributed to the incorporation of TiO2, which facilitates interfacial charge separation and accelerates electron transfer, thereby significantly enhancing the RSA of Cs2AgBiBr6@TiO2. Under identical testing conditions, the optical limiting thresholds of the (Cs2AgBiBr6)6/PMMA and the (Cs2AgBiBr6@TiO2)6/PMMA OGs were measured to be 5.33 J cm−2 and 3.87 J cm−2, respectively. Compared to the (Cs2AgBiBr6)6/PMMA OG, the (Cs2AgBiBr6@TiO2)6/PMMA OG demonstrates superior optical limiting performance. Electrochemical impedance spectroscopy (EIS) measurements demonstrated that Cs2AgBiBr6@TiO2 exhibits lower impedance (Rct) and favorable photocurrent response (0.61 µA cm−2), confirming its efficient charge separation/transport capability, which further promotes the RSA effect of Cs2AgBiBr6@TiO2. These results indicate that Cs2AgBiBr6@TiO2 holds promising potential for applications in optical limiting devices.
研究领域:
材料科学
·
光子学
·
纳米技术
·
电化学
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2015
·Vol. 7
·期 8
·679-684
·
IF 1.431
Zhou Weichao,Lu Ziyang,Lan Jinze,Si Naichao,He Ming,Chen Tingting,Li Jiqin,Li Fang,Xiao Peng,Wang Dandan,Yan Yongsheng,Yan Chunyong
A novel magnetic imprinted TiO2 photocatalyst (Imprinted TiO2/C/Fe3O4) was prepared based on ciprofloxacin (CIP) as the template molecule, tetrabutyl titanate (TBOT) as the cross-linking precursor, and C/Fe3O4 as the
matrix material. C/Fe3O4 was synthesized by the hydrothermal method. The results indicated that the imprinted TiO2/C/Fe3O4 possessed annular structure and paramagnetic property (M
s = 37.62 emu/g). Moreover, Imprinted
TiO2/C/Fe3O4 was proved to exhibit higher photocatalytic efficiency than ordinary TiO2/C/Fe3O4, the degradation rate of degradation of CIP with imprinted TiO2/C/Fe3O4 in 120 min under the visible
light irradiation was 78.78%. In addition, compared with ordinary TiO2/C/Fe3O4, imprinted TiO2/C/Fe3O4 showed the strong ability to selective recognition and photodegradation of CIP.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 9
·6558-6565
·
IF 1.483
Qin Wen-Li,Lv Han,Xia Tian,Ye Ying,Chen Xue-Gang,Lyu Shuang-Shuang
Talc is a layered silicate that was long recognized as un-intercalated. In this study, we prepared a novel talc/TiO2 nanocomposite by intercalating tetrabutyltitanate (TNBT) into talc and then hydrolyzing and calcining them at 500 °C. The XRD and TEM characterizations
suggested that we successfully intercalated TNBT into the talc layers while the original layered structure was preserved. The pore volumes and BET surface areas were enhanced greatly during the preparation of the nanocomposite, which induced higher methylene blue (MB) adsorption when compared
with the acidified talc. The photocatalytic degradation capacity of the samples increased significantly with the loading of TiO2 nanoparticles and TNBT/talc ratios. In addition, the spatial confinement of talc layers may also enhance its photocatalytic activity. The maximum MB removal
rate exceeded 99.8% at 2.0 g L−1. The dimethylamino and methyl groups of MB molecules were preferably degraded according to the full-scan UV-Vis spectra. The MB removal rates increased with initial pH value and declined with initial MB concentration. Furthermore, the as-prepared
talc/TiO2 nanocomposite is a recyclable material according to the recycling experiments. The intercalation of talc and preparation of talc/TiO2 nanocomposite opened a new approach to utilize talc and a novel method to fabricate photocatalytic materials.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiandong Zuo,Zhao Liu,Chaoyun Luo,Guangliang Gary Liu
Colorless polyimides (CPIs) have emerged as crucial substrate materials for OLED displays. Polythioetherimide (PTEI) materials with sulfur atoms, demonstrate superior optical property, thermal stability and solubility compared with conventional polyimides. In this work, two types of soluble PTEI films were synthesized via a thiol-ene click reaction. By adjusting the molar ratio of titanium or zirconium n-butoxide to PTEIs, two series of PTEI-based nanohybrid films (PTEIs-Ti-X% and PTEIs-Zr-X%) were fabricated with 4–12 wt% of TiO 2 or ZrO 2 . SEM and XRD analyses confirmed homogeneous dispersion of the inorganic components. The hybrid films exhibited high thermal stability, with 5 % weight loss temperatures (Td 5 ) reaching 342 °C and 331 °C, and glass transition temperatures (T g ) ranged between 189–225 °C and 184–229 °C for the Ti- and Zr-containing hybrids, respectively. They both displayed low thermal expansion coefficients (CTE), indicating outstanding dimensional stability. Optically, the refractive index at 633 nm could be tuned from 1.6920 to 1.7341 for Ti hybrids and from 1.6867 to 1.7247 for Zr hybrids. Transparency measurements at 450 nm remained above 75 % for Ti-based films and reached up to 89 % for Zr-based films. Overall, PTEI hybrid films exhibit a well-balanced combination of properties for high-performance optical and display applications
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DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.2
Bo Ge,Lu Han,Bo Gao,Tingxiao Zhang,Xiuling Li,Xiaotao Zhu,Xipeng Pu,Wenzhi Li
A mesoporous SiO2-TiO2-x composite without any modification was obtained to separate oil-in-water and water-in-oil emulsions solely by gravity. To simulate the actual pollution treatment process in sewage treatment plants, adsorption and degradation properties were studied after the initial emulsion separation. The research result indicates that the reported mesoporous SiO2 can be employed as an excellent absorbent and catalyst carrier. After light irradiating for 120 min, the degradation efficiency of SiO2-TiO2-4 for Rhodamine B, methyl orange, methylene blue, and ciprofloxacin hydrochloride reaches 99.3%, 91.5%, 98.7%, and 96.2%, respectively.
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）