Inorganic Chemistry Frontiers
·
2023
·
IF 7
Yi Zhang,Shao Yan,Fang Xiao,Xihui Shan,Xulong Lv,Weili Wang,Yanjie Liang
With the occurrence of global health events such as COVID-19, the development of high-performance ultraviolet-C (UVC) light sources for efficient and convenient sterilization applications holds promising scientific and engineering prospects. However, discovering reliable and stable luminescent materials capable of converting incident excitation energy to UVC radiation remains a challenge. Herein, we report a new Sr2P2O7:Pr3+ phosphor that exhibits exceptional capabilities in X-ray energy absorption, storage, UVC-light conversion, and persistent UVC light emission. Specifically, minutes of X-ray excitation can result in more than 24 h of continuous UVC persistent luminescence when monitored at 222 nm emission, realizing far-UVC afterglow for the first time. Intense UVC persistent light emission could be detected by a UVC corona camera in bright indoor and outdoor environments without interference from artificial light or natural sunlight, in consideration of the avoidance of the spectral overlap with ambient light. The self-sustained UVC persistent luminescence form was demonstrated as an optical-conversion strategy for sterilization application, whereby the charged Sr2P2O7:Pr3+ persistent phosphor could effectively inactivate infectious methicillin-resistant Staphylococcus aureus (MRSA) within 30 min in an excitation-free manner, offering new insights into developing UVC light sources for sterilization applications. This work expands the field of UV persistent luminescence research to the far-UVC spectral region and is expected to bring new and power-free solutions to some important applications where far-UVC light is needed, such as sterilization and photodynamic therapy.
研究领域:
材料科学
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光学
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生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
MENDELEEV COMMUNICATIONS
·
2019
·
IF 2.01
Yuliya E. Tyutereva,Peter S. Sherin,Zizheng Liu,Victor F. Plyusnin,Ivan P. Pozdnyakov
Quantum yields of indirect UVC photodegradation of p -arsanilic acid (a widely used phenylarsonic feed additive) caused by the photolysis of humic substances were measured. The acquired results demonstrate that the efficiency of such decomposition of p -arsanilic acid is comparable with that of its direct UVC photolysis due to the participation of active intermediates generated during the photolysis of humic substances. These results could be important for understanding the fate of p -arsanilic acid during an UVC disinfection of wastewaters containing natural humic substances.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science and Ecotechnology
·
2024
·
IF 14
Yinjie Zhu,Jian Ding,Xiaoxiong Wang,Xuejian Wang,Huansheng Cao,Fei Teng,Shishi Yao,Zhiru Lin,Yuelu Jiang,Yi Tao
Harmful cyanobacterial blooms (HCBs) pose a global ecological threat. Ultraviolet C (UVC) irradiation at 254 nm is a promising method for controlling cyanobacterial proliferation, but the growth suppression is temporary. Resuscitation remains a challenge with UVC application, necessitating alternative strategies for lethal effects. Here, we show synergistic inhibition of Microcystis aeruginosa using ultraviolet A (UVA) pre-irradiation before UVC. We find that low-dosage UVA pre-irradiation (1.5 J cm −2 ) combined with UVC (0.085 J cm −2 ) reduces 85% more cell densities compared to UVC alone (0.085 J cm −2 ) and triggers mazEF -mediated regulated cell death (RCD), which led to cell lysis, while high-dosage UVA pre-irradiations (7.5 and 14.7 J cm −2 ) increase cell densities by 75–155%. Our oxygen evolution tests and transcriptomic analysis indicate that UVA pre-irradiation damages photosystem I (PSI) and, when combined with UVC-induced PSII damage, synergistically inhibits photosynthesis. However, higher UVA dosages activate the SOS response, facilitating the repair of UVC-induced DNA damage. This study highlights the impact of UVA pre-irradiation on UVC suppression of cyanobacteria and proposes a practical strategy for improved HCBs control.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD PROTECTION
·
2021
·
IF 2.077
Wenwen Wang,Dianbo Zhao,Ke Li,Qisen Xiang,Yanhong Bai
ABSTRACT This study was conducted to investigate the inactivation of foodborne pathogens and the quality characteristics of fresh chicken breasts after UVC light-emitting diode (UVC-LED) treatment. Fresh chicken breasts were separately inoculated with Salmonella Typhimurium, Escherichia coli O157:H7, and Listeria monocytogenes at initial populations of 6.01, 5.80, and 6.22 log CFU/cm 2 , respectively, and then treated with UVC-LED irradiation at 1,000 to 4,000 mJ/cm 2 . UVC-LED irradiation inactivated the test bacteria in a dose-dependent manner. After UVC-LED treatment at 4,000 mJ/cm 2 , the populations of Salmonella Typhimurium, E. coli O157:H7, and L. monocytogenes on chicken breasts were decreased by 1.90, 2.25, and 2.18 log CFU/cm 2 , respectively. No significant changes ( P > 0.05) were found in color, pH, texture, and thiobarbituric acid–reactive substances of chicken breasts following UVC-LED irradiation at doses ≤4,000 mJ/cm 2 . These results indicate that UVC-LED radiation is a promising technology for reducing the level of microorganisms while maintaining the physicochemical characteristics of poultry meat.
研究领域:
食品安全
·
微生物学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xing-Xing Wang,Yi-Li Lin,Tian-Yang Zhang,Zheng-Yu Dong,Zhen-Ning Luo,Chen-Yan Hu,Yu-Lin Tang,Bin Xu
A novel UV light, UVC laser, was used to activate persulfate (PS) for degrading bisphenol A (BPA) in this study. This new light source can emit concentrated beam, and achieve 74.5% of BPA removal within only 60 s when activating PS. Sulfate radicals (SO 4 − ) and hydroxyl radicals (OH ) were identified in the UVC laser/PS system. In the case of the same total irradiance energy, the concentrated beam performed a better removal efficiency of BPA than the diffused beam. Compared with the diffused beam, the steady-state concentrations of SO 4 − and OH under concentrated beam increased by 26.21% and 361.25%, respectively. In addition, the depth-to-diameter ratio (h/D) of the reaction vessels also had a significant effect on the removal efficiency of BPA and the highest degradation rate obtained at h/D = 0.65. High UVC laser intensity, high PS dosage, and circumneutral pH conditions could promote BPA degradation, whereas the presence of water matrix (including chloride, bromide, bicarbonate, and natural organic matter) exhibited opposite effects. The BPA degradation intermediates in the UVC laser/PS system were identified by LCMS and the BPA degradation pathways were proposed accordingly. This study is the first one illustrating the influence of laser beam types, h/D ratio of the reactor vessel, and water matrix on UVC laser/PS application in water treatment process, which can provide essential knowledge for removing micropollutants in water using the novel UVC laser/PS AOP.
研究领域:
环境科学
·
水处理技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 12
·2745-2753
·
IF 7
Hang Zhao,Liang Zhang,Jinsuo Lu,Shouning Chai,Jinliu Wei,Yuning Yu,Ruoyan Miao,Lvling Zhong
Bacterial infections caused by the growth and reproduction of pathogenic bacteria on wounds are one of the main reasons that hinder wound healing. Antibacterial wound dressings protect wounds from bacterial infections. Herein, we developed a polymeric antibacterial composite film using polyvinyl alcohol (PVA) and sodium alginate (SA) as the substrate. The film used praseodymium-doped yttrium orthosilicate (Y2SiO5: Pr3+, YSO-Pr) to convert visible light into short-wavelength ultraviolet light (UVC) to kill bacteria. The YSO-Pr/PVA/SA showed upconversion luminescence in photoluminescence spectrometry tests, and the emitted UVC inhibited Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria in antibacterial tests. In vivo animal tests showed that YSO-Pr/PVA/SA is effective and safe for inhibiting bacteria in real wounds. The in vitro cytotoxicity test further confirmed the good biocompatibility of the antibacterial film. In addition, YSO-Pr/PVA/SA exhibited sufficient tensile strength. Overall, this study demonstrates the potential of upconversion materials for use in medical dressings.
研究领域:
材料科学
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生物医学工程
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伤口护理
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抗菌技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Light-Science & Applications
·
2018
·Vol. 7
·期 1
·1-11
·
IF 13.625
Yang Yan-Min,Li Zhi-Yong,Zhang Jun-Ying,Lu Yue,Guo Shao-Qiang,Zhao Qing,Wang Xin,Yong Zi-Jun,Li Hong,Ma Ju-Ping,Kuroiwa Yoshihiro,Moriyoshi Chikako,Hu Li-Li,Zhang Li-Yan,Zheng Li-Rong,Sun Hong-Tao
Phosphors emitting visible and near-infrared persistent luminescence have been explored extensively owing to their unusual properties and commercial interest in their applications such as glow-in-the-dark paints, optical information storage, and in vivo bioimaging. However, no persistent phosphor that features emissions in the ultraviolet C range (200–280 nm) has been known to exist so far. Here, we demonstrate a strategy for creating a new generation of persistent phosphor that exhibits strong ultraviolet C emission with an initial power density over 10 milliwatts per square meter and an afterglow of more than 2 h. Experimental characterizations coupled with first-principles calculations have revealed that structural defects associated with oxygen introduction-induced anion vacancies in fluoride elpasolite can function as electron traps, which capture and store a large number of electrons triggered by X-ray irradiation. Notably, we show that the ultraviolet C afterglow intensity of the yielded phosphor is sufficiently strong for sterilization. Our discovery of this ultraviolet C afterglow opens up new avenues for research on persistent phosphors, and it offers new perspectives on their applications in terms of sterilization, disinfection, drug release, cancer treatment, anti-counterfeiting, and beyond.
研究领域:
材料科学
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光子学
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生物医学工程
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 11
·4170-4180
·
IF 8.307
Zhenheng Zhang,Shengyi Yang,Jinming Hu,Hui Peng,Hailong Li,Peiyun Tang,Yurong Jiang,Libin Tang,Bingsuo Zou
Recently, lead-based halide perovskites have gained extensive attention due to their outstanding optoelectronic properties. However, the toxicity of lead would seriously limit its future application. To address these issues, in this work novel ligand-free organic–inorganic hybrid metal halide TBASnCl3 (C16H36NSnCl3) quantum dots are synthesized by a one-pot method at room temperature, and they showed high anti-water stability and high potential applications for high-performance UVC photodetectors. Our experimental data showed that the responsivity of the lateral photodetectors Au/TBASnCl3/Au, in which the active layer (i.e. TBASnCl3) was synthesized by further introducing SnF2 as a precursor besides SnCl2, reached 7.3 mA W−1 with a specific detectivity of 1.67 × 1011 Jones under 0.36 mW cm−2 254 nm illumination at −5 V, and it showed a long lifetime even in an environment with an air humidity of 60%. Therefore, it laid a solid foundation for further fabricating lead-free metal halide optoelectronic devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2021
·
IF 6.789
Ying Zhang,Yujie Luo,Shiqi Fu,Xiulong Lv,Qian He,Fangying Ji,Xuan Xu
UVC (wavelength < 280 nm) has a wide range of applications in the field of water disinfection due to its excellent bactericidal performance. In this work, we synthesized an upconversion luminescent material, β-NaYF 4 : Pr 3+ , Li + (NYF), which can generate UVC, and compounded it with a BiOCl photocatalyst to synthesize β-NaYF 4 : Pr 3+ , Li + @BiOCl (NYF-Bi) with a core-shell structure. The NYF-Bi composite material can be driven under visible light and has high photocatalytic activity . The bactericidal performance of NYF and NYF-Bi were evaluated using Escherichia coli , Staphylococcus aureus , Shigella and Salmonella . The NYF-Bi composite material killed 99.99% of E. coli under visible light (λ ≥ 420 nm) within 180 min and maintained high germicidal efficacy after 4 cycles. Finally, we deduced the sterilization mechanism of the NYF-Bi composite material through carrier dynamics studies and catching agent experiments. The death of bacteria was mainly caused by UVC light and active species , including h + , OH, and O- 2. This research provides a new material for water disinfection.
研究领域:
环境科学
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 24
·8457-8466
·
IF 4.39
Shao Yan,Yanjie Liang,Yafei Chen,Jingwei Liu,Dongxun Chen,Zhengwei Pan
Visible and infrared persistent phosphors have gained considerable attention in recent years and are being widely used as glow-in-the-dark materials in dark environments. In contrast, the progress in persistent phosphors emitting at the other end of the spectrum, i.e., the shorter-wavelength ultraviolet-C (UVC; 200–280 nm), is rather slow. Here we report the design and synthesis of a well-performing Pr3+-doped UVC emissive persistent phosphor, Lu2SiO5:Pr3+, which exhibits intense UVC persistent luminescence peaking at 270 nm and a long persistence time of more than 12 h after excitation with a 254 nm UV lamp. Besides, the UVC persistent luminescence of a UV pre-irradiated sample can be repeatedly revived after repeated short-illumination with low-energy white light via a process called photostimulated persistent luminescence. Owing to the distinct spectral features of UVC light and the self-sustained luminescence properties, the UVC persistent luminescence of the Lu2SiO5:Pr3+ persistent phosphor can be clearly monitored and imaged using a corona camera in bright environments including direct sunlight and indoor light. The Lu2SiO5:Pr3+ persistent phosphor is expected to find promising applications in the covert optical tagging field.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17343-17352
·
IF 8.067
Shao Yan,Yanjie Liang,Yi Zhang,Bibo Lou,Jingwei Liu,Dongxun Chen,Shihai Miao,Chonggeng Ma
Solar-blind ultraviolet-C (UVC; 200–280 nm) luminescent materials have exhibited great potential for wide applications in photomedicine and photochemistry due to the unique spectral features of UVC light. However, it is still a challenging work to develop persistent phosphors emitting in the UVC spectral region owing to the lack of suitable host materials and emitting centers. Herein, we report a series of LiLuSiO4:Pr3+,Sm3+ UVC persistent phosphors that can be charged by a 254 nm UV lamp or a high-energy X-ray beam giving rise to long-lasting UVC light emission peaking at 280 nm. More importantly, a considerable enhancement of UVC afterglow intensity and decay time has been achieved by Sm3+ co-doping because the Sm3+ ions can act as effective electron traps, which has been verified by the spectroscopic investigations and first-principles calculations. On top of this, narrowband ultraviolet-B (NB-UVB) persistent luminescence with a line emission at 313 nm has also been realized by introducing Gd3+ into LiLuSiO4:Pr3+,Sm3+ persistent phosphors based on persistent energy transfer from Pr3+ to Gd3+. Considering that the UVC and NB-UVB persistent luminescence can fully avoid severe interference from ambient light, the as-prepared LiLuSiO4:Pr3+,Sm3+ and Li(Lu,Gd)SiO4:Pr3+,Sm3+ persistent phosphors can find promising applications as invisible identification taggants in a bright environment.
研究领域:
材料科学
·
光化学
·
医学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Cai Chongyang,Li Leipeng,Lv Xiaohuan,Li Huimin,Li Tao,Li Pei,Zhao Wenting,Zi Lingzhu,Feng Shiji,Fan Xuan,Zhang Hailei,Peng Dengfeng,Wang Feng,Qiu Jianrong,Yang Yanmin
Lanthanides-doped luminescent materials have gathered considerable attention due to their application potential in stress sensing, lighting and display, anti-counterfeiting technology and so forth. However, existing materials mainly cover the 380–1540 nm range, with slight extension to the UV region, impeding their applications in solar-blind imaging, background-free tracking, concealed communication, etc. To address this challenge, here we propose guidelines for far-UVC (200–230 nm) optical design. Accordingly, we achieve multi-stimulated far-UVC luminescence at ~222 nm in Pr 3+ -doped SrF 2 , stemming from the inter-configurational 4f5d → 4f 2 transition of Pr 3+ . Besides Pr 3+ , the SrF 2 host shows high tolerance to Ce 3+ , Nd 3+ , Sm 3+ , Eu 2+,3+ , Gd 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ and Yb 3+ , vastly extending the emission wavelength across the entire spectral range from 200 to 1700 nm. Particularly, these materials exhibit self-recoverable mechanoluminescence by direct mechanical excitation, along with thermally and mechanically stimulated emission after X-ray irradiation. We demonstrate that these lanthanides-doped SrF 2 crystals offer unique opportunities for high-contrast marking and structural health monitoring in complex environments.
研究领域:
光学材料
·
光电子学
·
固体物理
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）