ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Nuan Xu,Zhenhua Tang,Yan-Ping Jiang,Junlin Fang,Li Zhang,Xiaofang Lai,Qi-Jun Sun,Jing-Min Fan,Xin-Gui Tang,Qiu-Xiang Liu,Ji-Kang Jian
Antibiotics play an essential role in the treatment of various diseases. However, the overuse of antibiotics has led to the pollution of water bodies and food safety, affecting human health. Herein, we report a dual-emission MOF-based flexible sensor for the detection of antibiotics in water, which was prepared by first encapsulating rhodamine B (RhB) by a zeolite imidazolium ester skeleton (ZIF-8) and then blending it with polyvinylidene difluoride (PVDF). The luminescent properties, structural tunability, and flexible porosity of the MOF-based composites were combined with the processability and flexibility of polymers to prepare luminescent membranes. The sensor is capable of dual-emission ratiometric fluorescence sensing of nitrofurantoin (NFT) and oxytetracycline (OTC), exhibiting sensitive detection of fluorescence burst and fluorescence enhancement, respectively, with detection limits of 0.012 μM and 8.9 nM. With the advantages of visual detection, high sensitivity, short detection time, and simplicity, the highly sensitive ratiometric fluorescent flexible sensor has great potential for detecting antibiotics in an aqueous environment. It will further stimulate interest in luminescent MOF-based mixed matrix membranes and their sensing applications.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 11
·1-16
·
IF 5.3
Zhuang Dengke,Guo Hao,Wei Yuli,Yu Zhiguo,Peng Liping,Ma Yanyan,Hui Yingfei,Yan Yu,Yang Wu
A sensitive and accurate ratiometric fluorescent sensor (RhB@UIO-67) is constructed by simply encapsulating rhodamine B (RhB) within a zirconium-based metal–organic framework (UIO-67). Based on the inhibition effect of ligand–to-metal charge transfer, adenosine triphosphate ATP induces a significant enhancement in the MOF centre emission, but does not affect the fluorescence of RhB in the probe material at all, which are respectively employed as detection signal and reference signal to realize sensitive ratiometric fluorescence detection of ATP in human serum and urine with a detection limit (LOD) of 0.45 μM. In particular, since the introduction of the target molecules does not cause any structural degradation, the sensor can be reused. Additionally, due to fluorescence resonance energy transfer between the probe components and malachite green (MG), addition of MG results in different degrees of quenching of the fluorescence emissions of UIO-67 and RhB in the RhB@UIO-67 and thus the probe material can simultaneously serve as a sensitive ratiometric sensing platform for MG detection in aquatic products including fish and shrimp with a low LOD of 0.03 μM. Benefited from its simplicity, sensitivity, and reusability, the sensing material has a wide application potential. Graphical abstract
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高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Shuo Li,Dedong Meng,Libo Hou,Dejun Wang,Tengfeng Xie
Cationic surfactant (CTAB) and anionic surfactant (sodium oleate) were used to modify CdS nanocrystals with different surface states. The surfactant CTAB led to surface states of hole traps, while sodium oleate induced surface states of electron traps on the surface of CdS. The photodegradation of rhodamine B (RhB) over these modified CdS nanocrystals was investigated under visible light irradiation. An efficient cycloreversion degradation of RhB occurred over the E-CdS nanocrystals. However, for H-CdS nanocrystals, an efficient N-deethylation reaction concomitant with a subsequent slow cycloreversion reaction of RhB was observed. The E-CdS sample showed a first-order kinetic rate for the cycloreversion degradation of RhB. By contrast, H-CdS sample shows a zero-order kinetic rate for the N-deethylation reaction of RhB followed by a first-order kinetic rate for the cycloreversion degradation. It is revealed that the different kinds of surface traps could significantly affect the dynamic properties of photogenerated charge carriers, which leads to different degradation mechanism of RhB. These findings demonstrate an alternative solution towards developing efficient photocatalysts with high selectivity by constructing different surface trap states.
研究领域:
材料科学
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光催化化学
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纳米材料
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表面工程
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环境化学
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物理化学
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高影响因子
RSC Advances
·
2024
·Vol. 14
·期 24
·16727-16735
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IF 3.9
Huizhong Wu,Qiong Yi,Xiang Li,Yingxi Wang,Ling Li
Low catalytic efficiency and catalyst recovery are the key factors limiting the practical application of advanced oxidation processes. In this work, a core–shell magnetic nanostructure Fe3O4@MIL-101(Fe, Co) was prepared via a simple solvothermal method. The core–shell structure and magnetic recovery performance were characterized by various technologies. The results of dye degradation experiments proved that within 10 minutes, the Fe3O4@MIL-101(Fe, Co)/PMS system can degrade more than 95% of 10 mg per L Rhodamine (RhB) at an initial pH of 7, which possesses higher catalytic activity than the Fe3O4/PMS system and the MIL-101(Fe, Co)/PMS system. The effects of initial solution pH and coexisting anions in water on the degradation of RhB were further discussed. The results showed that Fe3O4@MIL-101(Fe, Co) displayed excellent degradation efficiency in a wide pH range of 3–11 and capability of resisting coexisting anions. It is worth mentioning that after five cycles, the RhB removal rate can still be maintained at over 90% after 10 minutes of reaction. Free radical quenching experiments were further studied, confirming that ˙OH and SO4−˙ were involved in the degradation of RhB, while the dominating active free radical was SO4−˙. The possible reaction mechanism of the RhB degradation process was also inferred.
研究领域:
环境科学
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材料科学
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 2
·1-23
·
IF 3.8
Liu Huadong,Du Kezhen,Sun Hao
Carbon quantum dots (CQDs) have been increasingly applied in the field of photocatalysis due to their unique optical and electrochemical properties, which can significantly enhance the catalytic property of photocatalyst. In this paper, thermodynamic and kinetic analysis of the experimental process were carried out to investigate the mechanism of CQDs enhancing the photocatalytic performance of ZnO based on the adsorption and degradation test data. Firstly, the nitrogen and sulfur co-doped carbon quantum dots (NSCQDs) were synthesized using a one-step hydrothermal method, while zinc oxide (ZnO) nanocrystals were prepared via the direct precipitation method. The composite material of NSCQDs/ZnO was synthesized through a room temperature impregnation method. The next, the catalysts were characterized by a series of scientific methods. Besides, it creatively used the relevant knowledge of thermodynamics and kinetics in this paper to study the adsorption and photocatalytic processes of ZnO and NSCQDs/ZnO. The photocatalytic results showed that the degradation rate of RhB by NSCQDs/ZnO was up to 91.5% under optimal catalyst conditions at room temperature, which was higher than that of ZnO (49%), and the degradation curves were accorded with the pseudo-first-order kinetic model, and the kinetic constant of NSCQDs/ZnO(0.02666 min −1 ) is 3.45 times that of ZnO (0.00772 min −1 ). What is more, the result of the free radical quenching experiment proved ·O 2 - and OH· were the main active substances. Finally, the aim of this study was to synthesize an efficient and environmentally friendly catalyst and to investigate its mechanism.
研究领域:
材料科学
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环境科学
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化学动力学
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 12
·5678-5689
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IF 3.925
Shuangshuang Yang,Shengxiao Zhang,Xin Li,Yaxuan Du,Yuxin Xing,Qiang Xu,Zhenhua Wang,Li Li,Xiaotong Zhu
In this study, sulfur-doped biochar loaded with iron nanoparticles (Fe/S-BC) was easily prepared by a one-pot pyrolysis method using anhydrous FeCl3, Na2S2O3·5H2O, and cherry stone powder as raw materials and applied to activate peroxymonosulfate (PMS) for the degradation of Rhodamine B (RhB). Fe/S0.05-BC exhibited strong activation ability with regards to PMS activation, and 0.05 g L−1 of Fe/S0.05-BC along with 0.5 g L−1 of PMS could degrade 20 mg L−1 of RhB completely in 10 min, and the high activity was retained over a wide pH range. Electron paramagnetic resonance and quenching experiments proved that sulfate radicals (SO4•−), hydroxyl radicals (˙OH) and singlet oxygen (1O2) were the main reactive oxidizing species for RhB degradation. The high activity of the catalyst was attributed to the synergistic action among the Fe nanoparticles, carbon matrixes, and doped S elements. The quick and simple synthesis method, excellent activation efficiency, low-cost, and sustainable raw materials make the Fe/S0.05-BC composite a very promising candidate for environmental remediation.
研究领域:
环境科学
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材料科学
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高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Dongxu Gu,Yu Liu,Hongyu Zhu,Ying Gan,Biao Zhang,Weiting Yang,Jianyuan Hao
Nanomaterials with visible light-driven catalytic ability are beneficial in controlling environmental pollutants. Porphyrin-based metal organic gel (MOG) was herein synthesized in one step and magnetic metal organic gel (MMOG) was successfully prepared via in-situ reaction of MOG and Fe 3 O 4 . This MMOG was developed as a novel visible light assisted Fenton-like catalyst. The catalytic experiments showed the high photo-Fenton activity of MMOG in the degradation of Rhodamine B (RhB) in the presence of visible light and H 2 O 2 with a RhB degradation efficiency of 94.2% within 40 min. Notably, the obtained MMOG can kill E. coli and S. aureus with high killing rate (>99.999%) under visible light. Importantly, the MMOG can be recovered simply by an external magnetic field due to the unique magnetic property. This easily synthesized MMOG with photo-Fenton activity under visible light and magnetic property makes MOG based on the photo-Fenton reaction a prospective material for the environmental and biomedical applications.
研究领域:
环境科学
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材料科学
·
生物医学工程
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Mianmian Wu,Nan Li,Shixiang Zuo,Wenjing Shen,Guifang Sun,Qingfei Li,Minghao Shi,Jiangquan Ma
Piezocatalysis is a promising technology to address environmental pollution by converting mechanical energy into chemical energy. Herein, MoSe2 nanosheets with different 1T phase percentages (ranging from 30 to 80%) were constructed by adjusting hydrothermal temperature. Moreover, the roles of phase engineering in the piezocatalysis were thoroughly investigated by degrading rhodamine B and reducing Cr(VI) in ultrasonic vibration conditions. In particular, MoSe2 prepared at 220 °C (MoSe2-220) exhibits ultrahigh observed constant kobs and degradation rate k, which is superior to most reported catalysts to date. The experimental results indicate that the introduction of the 1T phase increases the active sites of the material, improves the conductivity, and inhibits the recombination of electrons and holes. Moreover, an internal electric field in the 2H phase induced by piezoelectric polarization is facilitated to separate electron–hole pairs, enabling the degradation and reduction to proceed. The capture experiments and EPR tests further confirm that •O2– and •OH are main reactive species, and a rational mechanism is finally put forward. This study offers a clear understanding of phase engineering in piezocatalysis and provides an efficiency strategy to construct highly efficient piezocatalysts.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 11
·6121-6133
·
IF 2.047
Mou Jiaxin,Xu Yunlan,Zhong Dengjie,Chang Haixing,Xu Chunzi,Wang Hui,Shen Hongyu
In order to enhance the photoelectric conversion efficiency of a photoanode and broaden its light absorption range, a ZnIn 2 S 4 /UiO-66/TiO 2 /Ti composite photoanode was developed. The maximum photocurrent density of the prepared photoanode is 2.56 mA cm −2 at 1.2 V (versus SCE), which is 1.79 times higher than that of ZnIn 2 S 4 /TiO 2 /Ti. The rhodamine B (RhB) removal rate, short-circuit current density and maximum power density of a photocatalytic fuel cell (PFC) constructed with the ZnIn 2 S 4 /UiO-66/TiO 2 /Ti photoanode and a Cu cathode are 98.01%, 0.22 mA cm −2 and 16.97 μW cm −2 respectively. The enhancement of the PFC performance is mainly attributed to the extremely good energy band matching and nano-size interface contact between ZnIn 2 S 4 and UiO-66. The existence of UiO-66 can be as an electronic transmission bridge, which not only facilitates the rapid transfer and utilization of photogenerated electrons, but also improves the adsorption ability of the photoanode for RhB molecules. Graphical Abstract
研究领域:
材料科学
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环境科学
·
能源科学
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高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Wenying Li,Yongkang Lv,Huazhang Zhao,Jianfeng Li
Electrochemical method has been used to induce peroxymonosulfate (PMS) activation for removing contaminants, yet low PMS activation rate limited its reaction activity. In this study, a microbial fuel cell (MFC) system with CuCo 2 S 4 as cathode catalyst for PMS activation (PMS/CuCo 2 S 4 -MFC) was established. The results showed that three-dimensional nanoflake structure of CuCo 2 S 4 could provide more active sites for PMS activation and exhibited the excellent electrochemical performance. The apparent degradation rate ( k a ) of Rhodamine B (RhB) in this system was 6.5 times and 1.2 times higher than MFC and CuCo 2 S 4 alone, suggesting that PMS activation was attributed to both CuCo 2 S 4 and electrochemistry in the system. In addition, the decrease of k a over five cycles in the system was approximately 3 times slower than CuCo 2 S 4 alone, indicating that the catalyst stability was improved significantly. This is mainly attributed to the in-situ regeneration of Cu 2+ and Co 3+ through receiving the electrons generated from MFC anode . The radical quenching results indicated that RhB was degraded mainly through the radical pathway, in which sulfate radical was the key reactive species. This study provides an energy-saving approach for PMS activation, which will be useful for further development of PMS-based advanced oxidation process .
研究领域:
环境科学
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电化学
·
催化材料
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Penghui Ding,Jun Di,Xiaoliu Chen,Junze Zhao,Kaizhi Gu,Yi Zhang,Sheng Yin,Gaopeng Liu,Jiexiang Xia,Huaming Li
Light-mediated reactive oxygen species generation with water and oxygen is generally regarded as a mild and efficient way for organic pollutants removal. However, it is highly difficult but desirable to construct a photochemical system with increased reactive oxygen species production. Herein, by using Bi 2 O 2 CO 3 as a prototype, we devise a simple metal chloride-involved etching method to achieve better light absorption and charge carriers separation in a wide-band-gap semiconductor, thus giving rise to improved molecular oxygen activation. The improved photoinduced reactive oxygen species production is further verified by excellent photocatalytic degradation ability of RhB, TC and BPA under visible and ultraviolet light illumination. In addition, the metal chloride-induced strategies—heterojunction formation and cation doping—significantly affect the dynamics and transfer of carriers, which are advantageous to manipulate one-/two-electron pathway for producing reactive oxygen species.
研究领域:
环境科学
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材料科学
·
光化学
·
催化
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Fangfang Duo,Mingliang Zhang,Xiaoting Feng,Chubei Wang,Liangliang Chu,Xi Chen,Jianwei Zhou
Constructing Z-scheme heterojunction has been regarded as a fascinating method to enhance the charge carrier separation rate and retain the high photoredox ability. In this paper, a novel 0D/2D MoS 2 QDs/BiOCl Z-scheme heterojunction with outstanding visible-light photocatalytic performance has been successfully prepared by a facile one-step strategy. The MoS 2 QDs with a diameter of 5 nm were uniformly distributed on the surface of BiOCl nanosheets . The optimized MoS 2 QDs/BiOCl heterojunction showed the most robust CIP and RhB degradation efficiency, which was approximately 32.2 and 44.7 times higher than that of pure BiOCl under visible light irradiation, respectively. This result can be attributed to the synergetic effects of up-conversion and direct Z-scheme heterojunction of the MoS 2 QDs. The optical property , morphology and surface feature of the catalyst were analyzed through the UV–vis DRS, PL , XRD , Raman, FT-IR, XPS, SEM and TEM. The study of ESR characterization and free radical capture experiments confirmed the Z-scheme heterojunction electron transfer route. Finally, a rational photocatalytic mechanism for pollutants degradation over the MoS 2 QDs/BiOCl heterojunctions were proposed. This study may provide a reliable strategy for the construction of Z-scheme bismuth-based heterojunction and its potential application in photocatalytic organic pollutants degradation.
研究领域:
材料科学
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光催化
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环境科学
·
纳米技术
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高影响因子
危险品化学品经营许可证（带存储）