Progress in Natural Science-Materials International
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2024
·
IF 4.8
Danyang Li,Yongqi Li,Dagui Liao,Mengqing Cao,Lulu Zhang,Shasha Zhang,Ling Chen,Yawen Chen,Huan Wang,Jian Qi,Feifei You
Utilizing solar energy to decompose tetracycline (TC) is a green strategy to treat wastewater. Herein, a heterogeneous hollow structured TiO 2 decorated Pt nanoparticles were successfully designed and synthesized via hard-template approach and photo-deposition process toward TC photodegradation . The Pt nanoparticles loaded on the surface of hollow structured TiO 2 can increase the visible light absorption due to the local surface plasmon resonance (LSPR) effect. Furthermore, owing to the tough electron oscillation of the LSPR excitation, the plasmonic hot holes on the surface of Pt nanoparticles can capture the electrons of TiO 2 , effectively facilitating the separation of photo-excited charge carriers because of the formation of Schottky junction constructed between Pt and TiO 2 . Combined the natural merits of shorten conveying path of charge carriers and physical structural stability for hollow structure, the optimal Pt/TiO 2 hetero-junction hybrid showed superior photocatalytic activity and durability for TC photodegradation with the degradation efficiency of 93.8 % after 30 min and the rate constant of 0.09196 min −1 under 300 W Xe lamp irradiation. This work displays a heterogeneous hybrids catalyst based on eco-friendly metal and semiconductor materials which can be used in the fields including without limitation TC photodegradation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yu Liu,Jian Zheng,Zhijia Zhu,Zhangmi Huang,Chunyan Hu,Baojiang Liu
Although the presence of the built-in electric field will solve the problem of carrier complexation in photocatalytic systems to some extent. However, free carriers will quickly shield the stabilized electric field and lose its effect. Therefore, how to introduce the dynamic piezoelectric field into the photocatalytic system has become an imminent problem. Herein, we developed an overcoated, visible light responsive, piezoelectric-assisted photocatalytic system by depositing Bi 2 S 3 photocatalysts with a narrow-band system onto the surface of highly piezo-responsive BaTiO 3 nanorods (BTO NRs). The heterojunction structure, bound by Bi-O chemical bonding, enhances carrier transport efficiency under the influence of the piezoelectric field. In the degradation experiments, the first-order rate constant for the degradation of chlortetracycline hydrochloride (CTC) in the BTO NRs/Bi 2 S 3 system with the optimal complex ratio was 0.0276 min −1 , which was 3.1 and 7.8 times higher than that of BTO NRs and Bi 2 S 3 , respectively. Additionally, we deduced the degradation pathways of CTC through a combination of Density functional theory (DFT) calculations and Liquid Chromatograph Mass Spectrometer (LC-MS), evaluating the toxicity of the intermediates. This complex system, featuring a highly photo-responsive semiconductor as a photo-acceptor deposited on a piezoelectric semiconductor surface providing a dynamic built-in electric field, enhances carrier separation efficiency under optimal light energy utilization conditions. These findings present novel and effective strategies for addressing two primary challenges in photocatalytic systems: low spectral utilization and significant photogenerated carrier complexation.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Rubina Jabeen,Muhammad Ali Tajwar,Changyan Cao,Yutong Liu,Shidi Zhang,Nasir Ali,Li Qi
Metal–organic frameworks (MOFs) are favorable hosting materials for fixing enzymes to construct enzyme@MOF composites and to expand the applications of biocatalysts. However, the rigid structure of MOFs without tunable hollow voids and a confinement effect often limits their catalytic activities. Taking advantage of the smart soft polymers to overcome the limitation, herein, a protection protocol to encapsulate the enzyme in zeolitic imidazolate framework-8 (ZIF-8) was developed using a glutathione-sensitive liposome (L) as a soft template. Glucose oxidase (GOx) and horseradish peroxidase (HRP) were first anchored on a light- and thermoresponsive porous poly(styrene-maleic anhydride-N,N-dimethylaminoethyl methacrylate-spiropyran) membrane (PSMDSP) to produce PSMDSP@GOx-HRP, which could provide a confinement effect by switching the UV irradiation or varying the temperature. Afterward, embedding PSMDSP@GOx-HRP in L and encapsulating PSMDSP@GOx-HRP@L into hollow ZIF-8 (HZIF-8) to form PSMDSP@GOx-HRP@HZIF-8 composites were performed, which proceeded during the crystallization of the framework following the removal of L by adding glutathione. Impressively, the biocatalytic activity of the composites was 4.45-fold higher than that of the free enzyme under UV irradiation at 47 °C, which could benefit from the confinement effect of PSMDSP and the conformational freedom of the enzyme in HZIF-8. The proposed composites contributed to the protection of the enzyme against harsh conditions and exhibited superior stability. Furthermore, a colorimetric assay based on the composites for the detection of serum glucose was established with a linearity range of 0.05–5.0 mM, and the calculated LOD value was 0.001 mM in a cascade reaction system. This work provides a universal design idea and a versatile technique to immobilize enzymes on soft polymer membranes that can be encapsulated in porous rigid MOF-hosts. It also holds potential for the development of smart polymer@enzyme@HMOFs biocatalysts with a tunable confinement effect and high catalytic performance.
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JOURNAL OF POROUS MATERIALS
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2025
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IF 3.2
Rui Guofen,Hu Zihao,Wu Huiqi,Ma Jianfeng
Composites of MIL-101(Fe)/CoFe 2 O 4 were prepared by a simple solvothermal approach and these composites were explored for tetracycline (TC) degradation by using light and persulfate (PS). MIL-101(Fe)/CoFe 2 O 4 catalyst showed superior catalytic performance when combined with photocatalysis and chemical catalysis. Experimental results suggest that the degradation efficiency reached 83% within 40 min. The TC adsorption ability of MIL-101(Fe)/CoFe 2 O 4 was tightly associated with pH, which can be interpreted through isoelectric point. Oxygen-active species, containing singlet oxygen ( 1 O 2 ) or superoxide radicals (O· 2‾), were also generated when there was dissolved oxygen, which could decompose the TC organic contaminant in solution. To be specific, MIL-101(Fe)/CoFe 2 O 4 /PS/Vis catalytic system was capable of eliminating TC through forming h + , 1 O 2 , O· 2‾, hydroxyl radicals (·OH) and sulfate radicals (·SO 4 ‾) species. Moreover, MIL-101(Fe)/CoFe 2 O 4 composite material showed outstanding stability.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2017
·Vol. 56
·期 2
·229-236
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IF 2.952
Qian Yang,Xianhong Zhang,Wenchao Ma,Yuhong Ma,Dong Chen,Li Wang,Changwen Zhao,Wantai Yang
The benzaldehyde derivatives, such as 2,4-dimethoxy benzaldehyde (PC1) and p -anisaldehyde (PC2), were successfully used as photoredox catalysts (PCs) in combination with typical RAFT agent 4-cyano-4-(phenylcarbonothioylthio)pentanoic acid (CTP) for the controlled photoinduced electron transfer RAFT polymerization (PET-RAFT) of methyl methacrylate (MMA) and benzyl methacrylate (BnMA) at room temperature. The kinetics of the polymerizations showed first order with respect to monomer conversions. Besides, the average number molecular weights ( M n ) of the produced polymers increased linearly with the monomer conversions and kept relatively narrow polydispersity (PDI = M w /M n ). For example, the M n of PMMA increased from about 3400 to 17,300 g mol −1 with the increasing in monomer conversion from 11% to 85%, and the PDI maintained around 1.36. The living features of polymerizations with the PC1 and PC2 as catalysts have also been further supported by chain extension and synthesis of PMMA- b -PBnMA diblock copolymer. As a result, the simplicity and efficiency of benzaldehyde derivatives catalyzed PET-RAFT polymerization have been demonstrated under mild conditions. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018 , 56 , 229–236
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RSC Advances
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2017
·Vol. 7
·期 72
·45369-45376
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IF 3.108
Ke Xu,Jian Feng
New types of LaFeO3/g-C3N4 heterostructures were successfully prepared and the enhanced photocatalytic hydrogen evolution and degradation activities under visible light irradiation were determined. They possessed the features of a Z-scheme photocatalysis system. The photoexcited electrons on the conduction band of LaFeO3 were transferred to the valence band of g-C3N4 by the solid–solid intimately contacted interfaces, where the electrons and holes were recombined, and thus improved the separation of photogenerated electrons and holes of g-C3N4. The LaFeO3/g-C3N4 heterostructures showed a higher hydrogen evolution rate and a higher amount of ˙OH than pure LaFeO3 and g-C3N4. The construction of the LaFeO3/g-C3N4 heterostructures was used to demonstrate an effective strategy for improving the photocatalytic property. The 5%-LaFeO3/g-C3N4 exhibited the highest photodegradation and water splitting rate. More than 95% of methylene blue (MB) was degraded after 15 min in the presence of 25 mg EDTA-2Na in 100 mL MB solution which was irradiated using a 3 W light-emitting diode. The 5%-LaFeO3/g-C3N4 heterojunction nanocomposite had a maximum hydrogen evolution rate of 158 μmol g−1 h−1.
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Scientific Reports
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2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Huang Renkun,Liang Ruowen,Fan Haimei,Ying Shaoming,Wu Ling,Wang Xuxu,Yan Guiyang
With increasingly stringent environmental regulations, the removal of nitrogen-containing compounds (NCCs) from gasoline fuel has become a more and more important research subject. In this work, we have successfully synthesized TiO 2 /α-Fe 2 O 3 heterogeneous photocatalysts with different mass ratios of TiO 2
vs . α-Fe 2 O 3 . Taking photocatalytic denitrification of typical alkali NCCs, pyridine, in gasoline fuel under visible light irradiation (λ ≥ 420 nm) as the model reaction, the TiO 2 /α-Fe 2 O 3 hybrids have exhibited enhanced photocatalytic activity compared with pure TiO 2 and α-Fe 2 O 3 , giving a pyridine removal ratio of ∼ 100% after irradiation for 240 min. The improved photocatalytic performance can be attributed to the integrative effect of the enhanced light absorption intensity and more efficient separation of photogenerated electron-hole pairs. Importantly, this type of heterogeneous photocatalysts can be easily separate in the reaction medium by an external magnetic field that is very important for industrial purpose. In addition, major reaction intermediates have been identified by the liquid chromatograph-mass spectrometer (HPLC-MS) and a tentative photocatalytic denitrification mechanism has been proposed.
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Nano Energy
·
2025
·
IF 17.1
Kaiyu Yang,Hongxi Zheng,Chao Zhong,Xingyun Huang,Qingkai Zhang,Kuibao Yu,Yuan Qie,Tao Chen,Hailong Hu,Fushan Li
The rapid development of near-eye display has put forward higher requirements for the resolution and image quality, while the performance of quantum dots (QDs) is virtually unlimited by pixel size, making them an ideal material for the next generation high-resolution display devices. However, there are still significant challenges in depositing multi-color pixels within the micron range and achieving high performance for the full-color quantum dot light emitting diodes (QLEDs). Herein, a combination of directional transfer printing and Langmuir-Blodgett (LB) technique was utilized to precisely transfer multi-color QDs arrays in the predetermined direction, and the full-color QDs arrays demonstrated fantastic morphology and uniform arrangement. As a result, the full-color QLEDs showed excellent performance with a resolution of 6350 pixels per inch (PPI), a luminance up to 62,947 cd/m 2 and a peak external quantum efficiency (EQE) of 10.03 %. In addition, pixel spacing layers were introduced to further suppress electrical crosstalk and unwanted light emission, and the redundant part of emissive layers enabled QDs to be embedded into pixel spacing layers readily. The resulting full-color QLEDs with independent pixels exhibited a same high resolution of 6350 PPI, with a luminance of 35,427 cd/m 2 and a peak EQE of 8.55 %. Our work represents the best performance of full-color QLEDs with both high efficiency and high resolution, which demonstrates great potential in the application of future near-eye displays.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Liying Wen,Qingguo Cai,Yangfan Du,Lin Han,Xin Li,Yuanhao Wang,Shifeng Wang
Energy-saving materials have vast application prospects in the field of construction. The development of energy-efficient and smart glass is crucial for reducing building energy consumption and improvin g human living environment. In this study, We developed a novel composite material with a Cs 0.33 WO 3 @TiO 2 core-shell structure, where TiO 2 is precisely deposited on the surface of Cs 0.33 WO 3 . The incorporation of TiO 2 into Cs 0.33 WO 3 enhances visible light transmittance and significantly improves near-infrared (NIR) absorption by forming a protective core-shell structure. This structure shields Cs 0.33 WO 3 from environmental degradation while also promoting efficient charge transfer, thereby modifying its electronic properties and further boosting NIR absorption. Additionally, TiO 2 strengthens the localized surface plasmon resonance (LSPR) of Cs 0.33 WO 3 , amplifying its overall NIR absorption capacity. Cs 0.33 WO 3 attracts electrons from TiO 2 , allowing more W 6+ to be reduced to W 5+ and enhancing the transparent heat insulation performance by a factor of 4.5. Meanwhile, the core-shell heterojunction of S-scheme narrows the band gap of TiO 2 and accelerates the charge separation and transfer, retaining more active photogenerated carriers to participate in the surface redox reaction and exhibiting a 11-fold increase in the photocatalytic rate. Furthermore, a superhydrophilicity property of the composite is achieved at a contact angle of 4.5°, demonstrating strong potential for self-cleaning application. The design and fabrication of this composite material with multifaceted functions offer valuable insights for practical applications in energy-saving coating films, contributing to low-carbon development.
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ACTA MATERIALIA
·
2024
·
IF 8.3
Jia-Xin Zhang,Zong-Yan Zhao,Tian-Long Yang,Jian Yang,Jin Zhang,Qing-Ju Liu,Yongbo Kuang
This study significantly enhances the photo(electro)catalytic capabilities of CuAlO 2 , a wide bandgap semiconductor, through targeted defect engineering. By employing a tailored solid-state reaction under a mixed oxygen-argon atmosphere, an intrinsic defect complex of [O i +Cu Al ] into has been successfully integrated into CuAlO 2 , thereby expanding its light absorption to the visible spectrum. The optimized CuAlO 2 sample, containing the [O i +Cu Al ] complex, demonstrates a remarkable 2.13-fold increase in photocatalytic degradation of tetracycline hydrochloride under visible-light irradiation. The maximum incident photon-to-current conversion efficiency value is elevated from 0 to 3.27 %, and the photocatalytic water splitting hydrogen production rate is increased by 10.78-fold. Density functional theory calculations, in conjunction with experimental data, elucidate the role of the [O i +Cu Al ] complex in facilitating visible-light absorption and improving the separation of photogenerated electron-hole pairs. Under simulated sunlight, the modified CuAlO 2 sample exhibits a substantial 2.26-fold enhancement in photocatalytic degradation of tetracycline hydrochloride, a photocurrent density increase from 0.80 to 8.20 µA·cm −2 , and a 1.13-fold increase in photocatalytic hydrogen production rate compared to defect-free CuAlO 2 . This research underscores the potential of strategic defect engineering to enhance visible-light-driven photo(electro)catalysis in wide bandgap semiconductors.
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Light-Science & Applications
·
2025
·Vol. 14
·期 1
·1-9
·
IF 23.4
Liu Nian,Liu Zhengzheng,Huang Yuanlong,Du Peipei,Zhang Xiang,Leng Yuxin,Luo Jiajun,Du Juan,Tang Jiang
Vacuum-deposited perovskite light-emitting diodes (PeLEDs) have demonstrated significant potential for high-color-gamut active-matrix displays. Despite the rapid advance of green PeLEDs, red ones remain a considerable challenge because of the inferior photophysical properties of vacuum-deposited red-light-emitting materials. Here, a rationally designed fluorine-modified phosphine oxide additive was introduced to in-situ passivate vacuum-deposited perovskites. The highly polar 2-F-TPPO incorporated perovskite films demonstrated enhanced photoluminescence quantum yield (PLQY), suppressed defects, and improved crystallinity. When implemented as active layers in PeLEDs, an external quantum efficiency (EQE) of 12.6% with an emission wavelength of 640 nm is achieved, which was 6 times higher compared to the previously reported most efficient vacuum-deposited red PeLEDs (EQE below 2%). Our findings lay the foundations for the further exploration of high-performance vacuum-deposited PeLEDs toward full-color perovskite displays.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Mengnan Xu,Zhiyuan Zhang,Jiajun Tao,Yan Nai,Chenglong Su,Shan Jiang
In this paper, the rare earth europium complex Eu(FTFA) 3 TPPO 2 (EuFT) was synthesized by using europium as the central ion, 4-trifluoro-1-(2-furanyl)-1,3-butanedione (FTFA) as the first ligand, and triphenylphosphine oxide (TPPO) as the second ligand. The structure was characterized by Fourier transform infrared spectroscopy (FTIR), and the photoluminescence process was investigated by UV and fluorescence spectra. The luminescent film was prepared by adding EuFT and the compatibilizer POE- g -PHEMA into the POE matrix, which can convert the UV light to the red light, and improve the photovoltaic conversion efficiency while reducing the effect of UV aging on the cell. Experimental results show that the complex can absorb UV light (200–400 nm) and emit red light (612 nm), the luminescent film also maintains good luminescence performance. The peel strength of POE/POE- g -PHEMA/EuFT film achieves 23.9 N cm −1 ，while that of POE film is 12.8 N cm −1 . The silicon cell prepared by POE/POE- g -PHEMA/EuFT film also showed higher EQE in UV region, and its current density–voltage (J–V) curve revealed that J sc increased from 33.05 to 34.25 mA/cm 2 , the conversion efficiency increased from 12.99% to 13.39%, and the relative efficiency increased by 3.08%. The rare earth europium complex effectively improved the photoelectric conversion efficiency of solar cells.
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