Materials Today Physics
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2020
·
IF 10.443
T. Zhang,H. Yu,J. Li,H. Song,S. Wang,Z. Zhang,S. Chen
Water pollution by pathogenic bacteria is a major threat to human health, and less-than-ideal disinfection and antimicrobial strategies have been developed to address waterborne pathogens. A green light–triggered photocatalytic antimicrobial rose bengal (RB)–modified cotton fabric (CF) (RB-CF) was prepared for wastewater disinfection by covalently binding RB to a CF surface. The antimicrobial rates of RB-CF against gram-positive Staphylococcus aureus and gram-negative Escherichia coli were both greater than 99.99% due to the generation of singlet oxygen that inactivates microbes under green light irradiation. Most importantly, RB-CF exhibited high stability, negligible cytotoxicity, and no release of free RB during the photocatalytic process, which was the key to its long-term antimicrobial activity and use security. Its long-term antimicrobial activity was further verified by the repeated photocatalytic disinfection; more than 99.99% of bacteria were inactivated even after five cycles. Therefore, this work may offer a potential avenue to develop low-cost, non-toxic, and durable antimicrobial fabrics with great potential for industrial and health-care applications, including but not limited to water purification , wastewater disinfection, masks, and protective clothing.
研究领域:
环境科学
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微生物学
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材料科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 4
·1-19
·
IF 2.8
Yao Bingdong,Zheng Guangwei,Luan Yina,Wang Lingxu,Xing Xuemin,Wang Yangyang,Liu Yan,He Jingxian,Zhang Fengqing
The morphology-controlled synthesis of nanostructured photocatalysts by an environmentally friendly and low-cost method provides a feasible way to realize practical applications of photocatalysts. Herein, Bi 2 WO 6 (BWO) nanophotocatalysts with mulberry shape, sheet-like, and round-cake morphologies have been successfully synthesized through a highly facile solvothermal process by simply adjusting the solvothermal temperature or utilizing selective addition of ethylene glycol as an orientation agent without using strong acids and bases and/or hazardous chemicals. The ratio of ethylene glycol and glacial acetic acid can affect the morphology and oxygen vacancy content of BWO, thereby influencing the photocatalytic performance. The photocatalytic activity of the as-prepared samples was evaluated by degradation of rhodamine B (RhB) and tetracycline under visible-light irradiation. The results indicated that all the BWO samples exhibited morphology-associated photocatalytic activity, and the sheet-like structure of BWO obtained via solvothermal treatment at 120 °C with ethylene glycol and glacial acetic acid ratio of 1:3 achieved the maximum specific surface area and possessed abundant oxygen vacancies, exhibiting outstanding photocatalytic activity for degradation of RhB and tetracycline. The degradation rate of RhB reached 100% within 20 min. To the best of our knowledge, this value is one of the most remarkable values for pristine BWO photocatalysts. Radical capture experiments demonstrated that hydroxyl radicals (·OH) play major roles compared with electrons (e − ) and holes (h + ) in the photocatalytic degradation process. A possible mechanism for the photocatalytic degradation of pollutants was proposed to better understand the reaction process. We believe that the more economical, efficient and greener methodology can provide guidance to develop highly efficient photocatalysts with favourable morphology and structure.
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
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Liuqing Xiao,Yuxing Huang,Yu Luo,Bo Yang,Yizhen Liu,Xuechang Zhou,Junmin Zhang
Cotton fiber is an abundant natural material, which has a long history of application in human daily life. However, a report on using such material in catalysis for organic synthesis is rare. We envisaged that the hydroxyl groups on the surface of cotton fiber could be utilized for functionalization and further immobilization of organic catalysts. In this report, we demonstrate the facile functionalization of cotton fiber by growing polymer brushes on its surface and further anchoring of Rose Bengal (RB) organic photocatalyst. This novel composite cotton photocatalyst demonstrated high efficiency in catalyzing cross-dehydrogenative coupling reactions and N-demethylation reactions with irradiation of visible light. The catalytic reaction can be facilely scaled up by a homemade circulating flow reactor.
研究领域:
化学工程
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材料科学
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有机合成
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DOI
高影响因子
DYES AND PIGMENTS
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2020
·
IF 4.613
Cheng Zhang,Meilin Liu,Taotao Li,Shengjun Liu,Qian Chen,Jian Zhang,Kui Zhang
In this work, we developed a dual-emission fluorescent carbon dots (CDs) using sodium citrate (SC), triethylenetetramine (TETA) and rose bengal (RB) as raw materials. Under the hydrothermal treatment , the carboxyl group in SC can crosslink with the amino group in TETA to form polymer-like intermediate by amide bond network. The RB molecule, a fluorescein derivative, lost halogen atoms under hydrothermal conditions and integrated with the skeleton structure of the network intermediate. Further dehydration and carbonization resulted in the dual-emission fluorescent CDs. Excited by ultraviolet (UV) light, the CDs exhibited blue and green luminescence centered at 440 nm and 525 nm, respectively. Due to the emission centers of these two colors showed different sensitivity to hypochlorous acid (HClO), we have designed a fluorescence assay to achieve quantitative detection of HClO. Upon addition of different concentrations of HClO to CDs solution in phosphate buffer (pH = 6), the blue emission decreased gradually while the green emission showed only a minimal decrease. By calculating the emission intensity ratio, a good linear relationship was achieved in the range of 0–17 μM, and the limit of detection was as low as 0.75 μM. The results reported here demonstrated a promising way to design organic dye modified CDs for sensing applications.
研究领域:
化学
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分析化学
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材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
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IF 7.504
Guannan Chen,Mingli Ni,Haiyan Peng,Feihong Huang,Yonggui Liao,Mingkui Wang,Jintao Zhu,V. A. L. Roy,Xiaolin Xie
Holographic photopolymer composites have garnered a great deal of interest in recent decades, not only because of their advantageous light sensitivity but also due to their attractive capabilities of realizing high capacity three-dimensional (3D) data storage that is long-term stable within two-dimensional (2D) thin films. For achieving high performance holographic photopolymer composites, it is of critical importance to implement precisely spatiotemporal control over the photopolymerization kinetics and gelation during holographic recording. Though a monochromatic blue light photoinitibitor has been demonstrated to be useful for improving the holographic performance, it is impractical to be employed for constructing holograms under green light due to the severe restriction of the First Law of Photochemistry, while holography under green light is highly desirable considering the relatively low cost of laser source and high tolerance to ambient vibration for image reconstruction. Herein, we disclose the concurrent photoinitiation and inhibition functions of the rose bengal (RB)/N-phenylglycine (NPG) system upon green light illumination, which result in significant enhancement of the diffraction efficiency of holographic polymer-dispersed liquid crystal (HPDLC) gratings from zero up to 87.6 ± 1.3%, with an augmentation of the RB concentration from 0.06 × 10–3 to 9.41 × 10–3 mol L–1. Interestingly, no detectable variation of the ϕ1/2kp/kt1/2, which reflects the initiation efficiency and kinetic constants, is given when increasing the RB concentration. The radical inhibition by RBH• is believed to account for the greatly improved phase separation and enhanced diffraction efficiency, through shortening the weight-average polymer chain length and subsequently delaying the photopolymerization gelation. The reconstructed colored 3D images that are easily identifiable to the naked eye under white light demonstrate great potential to be applied for advanced anticounterfeiting.
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 17
·7982-7989
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IF 2.7
Naitian Zhang,Yuehui Li,Wenzhe Shang,Wei Liu,Xusheng Cheng,Suchan Song,Xuedan Song,Yantao Shi,Ce Hao
In this paper, we investigated the role of excited-state hydrogen bonding in the photocatalytic carbon dioxide reduction reaction (CO2RR) utilizing Rose Bengal as a catalyst, through a combined experimental and theoretical approach. Experiments validated the successful conversion of CO2 to CO in a homogeneous aqueous solution system under light irradiation, without additional photosensitizers or sacrificial agents. Theoretically, the DFT/TDDFT calculations modeled the catalyst-reactants as a hydrogen-bonded complex (HBC), understanding the energy, hydrogen, and electron transfer mechanisms induced by excited-state hydrogen bonding. Combining the photophysical and photochemical insights revealed the complete catalytic cycle, identifying the water oxidation process as the rate-limiting step in the entire photocatalytic CO2RR process. Experimental and computational results provide molecular-level insights into the structure–activity relationships. This work enhances comprehension of the pivotal role of excited-state hydrogen bonding and holds significant reference value for enhancing the conversion efficiency in the photocatalytic CO2RR.
研究领域:
物理化学
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理论计算化学
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环境科学
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DOI
高影响因子
TALANTA
·
2018
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IF 4.244
Yang Zhang,Lu Yang,Yan-Hua Wang,Ai-Hua Liu
Highly porous carbon-based materials with 3-dimensional mesh structure as an adsorbent that have been used extensively in environmental treatment, however, it remains challenging to improve performance and to reduce costs. A novel Mo x P y nanoparticles anchored mesh structural biomass carbon (Mo x P y /MSBC) was prepared from renewable seaweed and applied as an efficient absorbent for the selective adsorption of dyes . The mesh structure of provides a powerful support for the Mo x P y nanoparticles and could protect the nanoparticles from being lost. Meanwhile, a better 3D mesh structure obtained endows MSBC a high surface area with a large number of active interaction sites. The Mo x P y /MSBC composite exhibits excellent selective adsorption properties and high adsorption capacity for methyl blue (MB) and rose bengal (RB) at distinctive pH and rapid removal rates within 5 min at 298 K. The adsorption kinetics , isotherm and thermodynamics were determined. In addition, the regeneration of the Mo x P y /MSBC could be accomplished in only three minutes through a simple method by using the absolute alcohol. Therefore, the simple synthesis, high efficacy, excellent selectivity and regenerability in aqueous medium enable the hybrid nanocomposites as excellent candidates to selective removal processes of dyes.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
TETRAHEDRON
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2017
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IF 2.651
Jing-Rui Xin,Jun-Tao Guo,Dominic Vigliaturo,Yan-Hong He,Zhi Guan
The visible-light driven reaction for the synthesis of tetrahydroquinoline derivatives via tandem radical cyclization of N,N -dimethylanilines with 2-benzylidenemalononitriles has been developed. Corresponding products were obtained with yields of up to 74% under mild conditions by using Rose Bengal as a triplet sensitizer, which is inexpensive, environmentally-friendly and easily acquired. This work demonstrates the potential benefits of Rose Bengal for the production of tetrahydroquinoline derivatives.
研究领域:
有机化学
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光化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
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2012
·Vol. 178
·期 1
·115-121
·
IF 3.033
Li Yang,Ran Gu,Yi Wen Jiao,Luo Hong Qun,Li Nian Bing
The surface of a glassy carbon electrode (GCE) was modified by electropolymerization of acridine red followed by drop-coating of graphene. The morphology was characterized by scanning electron microscopy. Uric acid (UA) is effectively accumulated on the surface of the modified electrode and generates a sensitive anodic peak in solutions of pH 6.5. Differential pulse voltammetry was used to evaluate the electrochemical response of the modified GCE to UA. Compared to the bare GCE, the GCE modified with acridine red, and to the graphene modified electrode, the new GCE displays high electrochemical activity in giving an oxidation peak current that is proportional to the concentration of UA in the range from 0.8 to 150 μM, with a detection limit of 0.3 μM (at an S/N of 3). The modified electrode displays excellent selectivity, sensitivity, and a wide linear range. It has been applied to the determination of UA in real samples with satisfactory results.
The surface of a glassy carbon electrode was modified by electropolymerization of acridine red onto its surface and then covering it with graphene dropped. The graphene-poly(acridine red) modified electrode displays high electrochemical activity in giving an oxidation peak current that is proportional to the concentration of uric acid in a certain range.
研究领域:
生物化学
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分析化学
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DOI
高影响因子
BIOTECHNIC & HISTOCHEMISTRY
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2024
·
IF 1.6
Zhenkun Zhu,Quan Li,Chunxiang Xiang,Hui Xing
In histological processing, the loss of a small biopsies can prevent diagnosis by the pathologist. Appropriate specimen marking dyes are helpful, but those sold for the purpose have trade-secret components. The purpose of this study is to find suitable dyes with known chemistry to improve the visibility of small specimens. Samples of various organs, including stomach, lung, nasopharynx, small intestine and sentinel lymph nodes, were labeled with Rose red D-FR (CI 282855, Direct red 227), Blue 2RL (CI 24315, Direct blue 80), and Purple D-5BL (CI 29120, Direct violet 66). Clinical pathologists evaluated the dyeing capability and determined any interference of the marking dyes with diagnosis of stained sections. Direct red 227, Direct blue 80, and Direct violet 66 all increased the visibility of small specimens, without interfering with hematoxylin & eosin (HE) staining or immunohistochemistry. All three dyes can therefore be recommended for marking small specimens such as biopsies.
研究领域:
病理学
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医学化学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2018
·
IF 3.525
Guoqiang Shen,Lun Pan,Zhe Lü,Chongqing Wang,Fazal-e- Aleem,Xiangwen Zhang,Ji-Jun Zou
Adsorption and photodegradation are promising approaches for removing organic pollutions. In this study, we combined these two processes by co-loading Fe-TiO 2 and Fe 2 O 3 quantum dots (QDs) on porous MCM-41, using a simple hydrolysis method. X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy results indicated that Fe-TiO 2 QDs are formed at low Fe precursor concentrations, while additional Fe 2 O 3 QDs are formed at higher Fe precursor concentrations. The Fe 2 O 3 and Fe-TiO 2 QDs impart high adsorption capacity and high photoactivity to the porous MCM-41, respectively. Thus, their combination results in a synergic effect of the adsorption and photodegradation. The highest-performing sample exhibits excellent performance in removing rose bengal from aqueous solution.
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
Journal of Physical Chemistry C
·
2011
·
IF 4.524
Jingfeng Dong,Mei Wang,Pan Zhang,Songqiu Yang,Jianyong Liu,Xueqiang Li,Licheng Sun
The readily obtained noble-metal-free molecular catalyst systems, with xanthene dyes (Rose Bengal, RB2–; Eosin Y, EY2–; and Eosin B, EB2–) as photosensitizers, [Co(bpy)3]Cl2 as catalyst, and triethylamine as sacrificial electron donor, are highly active for visible-light-driven (λ > 450 nm) hydrogen production from water. The turnover frequency is up to 54 TON/min versus RB2– with a RB2–/[Co(bpy)3]Cl2 molar ratio of 1:10 in CH3CN/H2O under optimal conditions in the first half hour of irradiation (λ > 450 nm), and the turnover number is up to 2076 versus RB2–. Comparative studies show the following: (1) The photocatalytic H2-evolving activity of the cationic cobalt complex [Co(bpy)3]Cl2 is apparently higher than the neutral cobaloxime complexes with xanthene dyes as potosensitizers, and also much higher than the analogous system of [Ru(bpy)3]Cl2/[Co(bpy)3]Cl2. (2) The UV–vis absorptions of xanthene dyes are red-shifted to different extents upon addition of [Co(bpy)3]Cl2 to the aqueous or CH3CN/H2O solutions of these dyes, while no change was observed in the UV–vis absorptions of photosensitizer with addition of the cobaloximes to the aqueous solution of RB2– or addition of [Co(bpy)3]Cl2 to the aqueous solution of [Ru(bpy)3]Cl2. (3) The fluorescence of RB2– is significantly quenched by [Co(bpy)3]Cl2, but not by the cobaloximes. These special performances of [Co(bpy)3]Cl2 are attributed to the electrostatically attractive interaction between the anionic organic dyes and the cationic cobalt catalyst. The probable mechanism for photoinduced hydrogen production catalyzed by the system of RB2–, [Co(bpy)3]Cl2, and triethylamine is discussed in detail on the basis of fluorescence and transient absorption spectroscopic studies.
研究领域:
化学
·
能源科学
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产品关联
DOI
高影响因子
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