JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Qing Hu,Huidong Tang,Hezhen Wu,Sihui Pan,Yanqiao Xu,Weihui Jiang,Lianjun Wang,Wan Jiang
Lead-free vacancy‐ordered halide double perovskite microcrystals are new alternatives to lead-based halide perovskite materials for lighting applications; however, they are limited by harsh synthesis conditions and low quantum efficiency. Hence, a facile solution recrystallization method was used to synthesize Te 4+ -doped Rb 2 SnCl 6 phosphors. Via Te 4+ doping, the phosphors show a yellow–green emission at 550 nm and a broadband emission line width of approximately 97 nm, achieving a high photoluminescence quantum yield of 74.2%, arising from the Te 4+ 1 S 0 → 3 P 1 self-trapping exciton transition. The Te 4+ -doped Rb 2 SnCl 6 microcrystals are subsequently used to fabricate a white light-emitting diode device, which shows a high color-rendering index of 97.1 and a correlated color temperature of 4739 K. This work reports a facile method to synthesize alloy double perovskite phosphors, opening up new avenues for the development of environment-friendly lighting applications.
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高影响因子
RSC Advances
·
2013
·Vol. 3
·期 43
·20606-20612
·
IF 2.562
Yongliang Cheng,Jiangtao Chen,Xingbin Yan,Zongmin Zheng,Qunji Xue
In this study, porous BiVO4 fibers were fabricated by a simple electrospinning technique followed by a controllable annealing of electrospun precursor fibers at different temperatures. The crystal structure, morphology, pore structure and photocatalytic properties of as-made porous BiVO4 fibers were systematically investigated. The results show that the final products have fibrous morphology and the phase structure of porous fibers belongs to monoclinic scheelite structure. The crystallinity and crystalline size increases, but the specific surface area decrease with increasing calcination temperature. These porous fibers all exhibit good optical absorption in visible light. As the sample calcined at 500 °C has larger specific surface area and better crystallinity, it exhibits the best photodegrading properties for rhodamine B solution.
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高影响因子
Frontiers of Materials Science
·
2018
·Vol. 12
·期 2
·118-128
·
IF 1.478
Wang Qian,Meng Guihua,Wu Jianning,Wang Yixi,Liu Zhiyong,Guo Xuhong
We fabricated pH and light dual-responsive adsorption materials which could induce the transition of surface wettability between hydrophobicity and hydrophilicity by using ATRP. The structure and morphology of adsorption materials were confirmed by ATR-FTIR, XPS, TGA and SEM. It showed that the modified cellulose (CE)-based foam was hydrophobic, which can adsorb a range of oils and organic solvents in water under pH = 7.0 or visible light irradiation ( λ > 500 nm). Meanwhile, the wettability of robust CE-based foam can convert hydrophobicity into hydrophilicity and underwater oleophobicity under pH = 3.0 or UV irradiation ( λ = 365 nm), giving rise to release oils and organic solvents. Most important of all, the adsorption and desorption processes of the modified CE-based foam could be switched by external stimuli. Furthermore, the modified CE-based foam was not damaged and still retained original performance after reversible cycle repeated for many times with variation of surface wettability. In short, it indicates that CE-based foam materials with switchable surface wettability are new responsive absorbent materials and have owned potential application in the treatment of oil recovery.
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高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 6
·065902
·
IF 1.449
Liguang Xiao,Xiaotong Zhang,Gang Yan
The Cr(VI) is a acute toxic and bioaccumulated pollutant in wastewater, the removal of these contaminants is particularly significant. Semiconductor photocatalysis is an effective method to reduce the Cr(VI) in the wastewater. In this paper, diatomite/Bi2S3 composite photocatalysts are synthesized by a facile in suit hydrothermal vulcanization method using bismuth nitrate and thiourea as precursors and diatomite as supporting materials. The structural information, morphologies, chemical states and optical properties of the composite are characterized by XRD, SEM, XPS and DRS. Under visible light irradiation (λ > 400 nm), the diatomite/Bi2S3 composite exhibit better photocatalytic reduction activity of Cr(VI) than the pristine Bi2S3. The photocatalytic mechanism is further investigated by the active species capturing tests and photoelectrochemical measurements.
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高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 32
·11264-11271
·
IF 4.099
Mengxiao Li,Yu Feng,Qingyong Tian,Weijing Yao,Li Liu,Xuan Li,Huanjun Wang,Wei Wu
Advanced fluorescent materials have demonstrated great value in the anti-counterfeiting field for information storage and hiding. In this work, a novel strategy for producing UV light-switchable fluorescent patterns to hide and store information is proposed based on carbon dots (CDs) and Y2O3:Eu composites with exceptional optical properties. CDs can present blue emission under both 254 nm and 365 nm UV light excitation, but Y2O3:Eu can only arouse a red color under 254 nm light excitation. Under conventional 365 nm excitation, a single blue color and partial information are shown, however, the whole information in patterns can be displayed under specific 254 nm excitation. The functional anti-counterfeiting patterns are made by screen printing using as-prepared polyvinyl alcohol (PVA)-medium fluorescent inks. Moreover, the hidden information retained its integrity after printed patterns were exposed to an ambient environment for 90 days. Such invisible, tunable and ultra-stable fluorescent patterns utilizing 254 nm UV light well achieve information hiding and storage and increase information security for anti-counterfeiting applications.
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高影响因子
Coatings
·
2022
·Vol. 12
·期 4
·512
·
IF 3.236
Song Wang,Yan Xu,Renjie Chen,Mengmeng Zhu,Muyi Wang,Mengmeng Cao,Yunpeng Liu,Haojie Ding,Shulan Zhang,Jueyao Bai,Jun Ren,Tongtong Xuan,Huili Li
All-inorganic halide perovskite nanomaterials have a high application potential in the field of display and lighting because of unique photoelectric properties. However, these materials suffer from problems related to poor water and thermal stabilities. In this study, green Eu3+-doped CsPbBr3/Cs4PbBr6perovskite composites that were synthesized by a saturated recrystallization method at room temperature showed an enhanced photoluminescence quantum yield of 87% and superior water and thermal stabilities to that of undoped perovskites. Finally, green Eu3+-doped CsPbBr3/Cs4PbBr6perovskite composites were fabricated into white light-emitting diodes (WLEDs) with a wide color gamut (124% of the National Television System Committee standard) and a high efficiency of 43.06 lm/W.
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高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2021
·Vol. 36
·期 9
·1835-1845
·
IF 3.089
Chen Changsong,Wu Yihua,Zhu Zhi-Gang,Shih Wan Y.,Shih Wei-Heng
Abstract All-inorganic perovskite materials have many advantages such as adjustable emission range, narrow emission peaks, and good crystallinity, which have attracted widespread interest. They can be used as solar cells, LEDs, photodetectors, displays, and other optoelectronic devices. However, poor environmental stability is the major factor limiting its applications. We introduced a Poly(styrene-ethylene-butylene-styrene) SEBS polymer to create perovskite/SEBS composite films which have excellent stability even in the water environment. Besides, due to the elastic nature of SEBS, the composite films exhibited good mechanical deformability and could maintain most of its fluorescence intensity after being stretched hundreds of times. A WLED device was constructed by stacking CsPbBr 3 /SEBS films and CsPbI 3 /SEBS films over a blue LED. The WLED performed well with color rendering index of 82.6 with chromaticity coordination (0.35, 0.36) and color temperature 4784 K. Graphic Abstract
In order to create a stable and flexible photoluminescent material, we combined a
poly(styrene-ethylene-butylene-styrene) (SEBS) polymer and cesium lead-halide
nanocrystals forming a flexible photoluminescent composite. The composite films
show both good environment stability and excellent flexibility.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Guijun Zhang,Qianwen Wei,Guangsheng Liu,Qi Li,Junlin Lu,Mehri Ghasemi,Juan Wang,Yu Yang,Baohua Jia,Xiaoming Wen
The dynamic defect tolerance under light soaking is a crucial aspect of halide perovskites. However, the underlying physics of light soaking remains elusive and is subject to debate, exhibiting both positive and negative effects. In this investigation, we demonstrated that surface defects in perovskite films significantly impact the performance and stability of perovskite solar cells, closely correlated with light soaking behaviors. Removing the top surface layer through adhesive tape, the surface defect density noticeably decreases, leading to enhanced photoluminescence (PL) efficiency, prolonged carrier lifetime, and higher conductivity. Consequently, the power conversion efficiency (PCE) of solar cells improves from 17.70% to 20.5%. Furthermore, we confirmed a positive correlation between surface defects and the light soaking effect. Perovskite films with low surface defects surprisingly exhibit a 3-fold increase in PL intensity and an 85% increase in carrier lifetime under 500 s of continuous illumination at an intensity of 100 mW/cm2. Beyond the conventional strategy of suppressing defect trapping, we propose increasing the capability of dynamic defect tolerance as an effective strategy to enhance the optoelectronic properties and performance of perovskite solar cells.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiang Li,Xiaoge Chen,Bo Wang,Gang Yu
The development of engineered nanomaterials has aroused great attention in controlling the existence of toxic micropollutants. However, their performance in complex environmental matrices is frequently neglected. Highly efficient enrichment coupled with synergistic degradation with low concentrations is challenging but significant in practical industrial applications. In this study, a large group of active pharmaceutical compounds (PACs) at environmentally relevant concentrations ∼ μg/L were rapidly extracted in core-shell MIL-100 (Fe), followed by effective degradation during the visible-light photo-Fenton process in situ. Unexpectedly, in natural secondary wastewater, adsorption capacities were inhibited (2–50 % decreased after 60 min), while the degradation kinetics of eight PACs were remarkably promoted (1.42–2.92 times higher). Under neutral pH, the accumulated pharmaceuticals within cages were effectively decomposed by •OH and 1 O 2 , mainly derived from visible-light-induced reduction of Fe (III)-cluster and the generation of ROS. The structural parameters (log K ow ) were closely correlated to the adsorption behavior (R 2 = 0.74), which remarkably facilitated the degradation. The powder was loaded onto the PTFE/ultrafiltration membrane in a flow-through reactor. The targeted PACs were rapidly degraded over the self-cleaning surface under visible light irradiation, implying a promising future for industrial application.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhen Pei,Pengfei Fei,Aiqin Zhang,Jiandong Guo,Jiacheng Hao,Jing Jia,Hailiang Dong,Qianqian Shen,Liqiao Wei,Husheng Jia,Bingshe Xu
ZIF-8 has excellent antibacterial potential as an important metal organic framework (MOFs) photocatalytic material. However, ZIF-8 is greatly restricted in photocatalytic antibacterial applications due to the wide band gap and only response to ultraviolet light. In this work, the spectral response of ZIF-8 is successfully extended to the visible light region by the thermal gas sensitization treatment technology. Meanwhile, the forbidden band width of the materials is narrowed by about 47%. The results of FTIR, XPS and EDS prove that the elements and functional groups in ZIF-8 have changed, indicating the completion of the thermal gas sensitization reaction. The results of XRD and SEM show that the modification process doesn’t change the crystal structure and morphology of ZIF-8; The result of BET demonstrates that the specific surface area of ZIF-8 decreases slightly after sensitization, but it is still as high as about 1500 m²/g. Photocatalysis studies indicate that the photo-generated charge separation and transfer efficiency of ZIF-8 improve significantly and the recombination reduce substantially after thermal oxygen sensitization. Photocatalytic antibacterial performances reveal that ZIF-8 after thermo-oxygen sensitization can rapidly produce active species such as·O 2 - and h + under visible light irradiation, and the bactericidal efficiency exceed 99% against Escherichia coli and Staphylococcus aureus within 20 min. This research provides scientific basis and experimental data for the application of ZIF-8 in microbial management and health protection.
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Small
·
2025
·
IF 12.1
Xiaobo Han,Hengbin Zhao,Huixuan Wang,Qingchun Wang,Fei Ruan,Weixiang Shang,Jinxiao Bao,Yuwei Ma
The construction of step-scheme (S-scheme) heterojunctions by integrating single-component semiconductors with strategic cocatalyst loading facilitates enhanced charge transfer, improving visible-light-driven photocatalytic hydrogen evolution efficiency. In this work, In 2 O 3 /CdS/NiSe 2 and In 2 O 3 /NiSe 2 /CdS heterostructures are synthesized through sequential deposition of CdS and NiSe 2 onto In 2 O 3 nanosheets with different loading orders. Combined analysis using in situ irradiated X-ray photoelectron spectroscopy and electron paramagnetic resonance (EPR) confirms the S-scheme charge transfer pathway in both In 2 O 3 /CdS and In 2 O 3 /NiSe 2 /CdS systems. The results show that the In 2 O 3 /CdS/NiSe 2 heterostructure exhibits three charge transfer pathways, while In 2 O 3 /NiSe 2 /CdS possesses only one. Charge density difference analysis and photoelectrochemical measurements indicate that, compared to In 2 O 3 /NiSe 2 /CdS, the multiple charge transfer pathways in In 2 O 3 /CdS/NiSe 2 significantly enhance photoinduced electron migration efficiency. According to Gibbs free energy calculations, Ni in In 2 O 3 /CdS/NiSe 2 resides at the outermost layer and exhibits the weakest hydrogen adsorption free energy, enabling it to serve as an additional active site that facilitates hydrogen desorption and enhances hydrogen evolution activity. Owing to these synergistic effects, the In 2 O 3 /0.8CdS/NiSe 2 -5 photocatalyst achieves a hydrogen evolution rate of 16,797.1 µmol g −1 under visible light-nearly four times higher than that of In 2 O 3 /NiSe 2 -5/0.8CdS (3,902.4 µmol g −1 ). This study offers theoretical and practical guidance for designing ternary heterojunctions with efficient multiple charge transfer pathways.
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DOI
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高影响因子
ANALYST
·
2025
·
IF 3.3
Cheng-Hua Xu,An-Yang Tao,Mei-Qing Meng,Xi-Le Zhang,Cheng Fang,Feng-Zao Chen,De-Man Han
Early diagnosis of neurodegenerative diseases relies on highly sensitive detection of their specific biomarkers. However, existing photoelectrochemical (PEC) sensing technologies, despite the promising prospects, exhibit significant limitations in detection stability, photoelectric conversion efficiency, and portability. This work reported an innovative approach integrating transition metal doping modification with paper-based electrodes to construct a highly sensitive and low-cost paper-based sensing platform for detecting neurofilament light chain protein (NEFL). Fe-doped TiO 2 nanomaterials were synthesized via a homogeneous thermal treatment method. Fe substitution within the TiO 2 lattice constructed an intermediate energy level, optimizing the bandgap to 2.17 eV. This expanded the photoresponse range into the visible spectrum, enhancing photocurrent intensity by 31-fold compared to pure TiO 2 . A printed carbon paper triple-electrode system was fabricated via a template method, demonstrating excellent stability and reproducibility. Based on an immunosandwich model, the presence of target NEFL triggered glucose oxidase conjugated Au nanoparticles (GOx@Au NP)-labeled signal antibodies to catalyze glucose into hydrogen peroxide, further sensitizing the photocurrent response of Fe-TiO 2 to achieve wide-range (0.01-200 ng mL -1 ) detection of NEFL. This work enhances PEC efficiency via Fe-doped TiO 2 and solves portability with paper-based electrodes, enabling sensitive NEFL detection, which supports early diagnosis of neurodegenerative diseases, and provides an innovative technical solution for rapid point-of-care diagnosis of neurodegenerative diseases, while also offering theoretical and experimental references for the modification of wide-band gap semiconductor materials and the development of paper-based sensing platforms.
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PubMed
高影响因子
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