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Poonsawat T, Promcharoen P, Meechai T, Chuaitammakit LC, Somsook E. Effect of K + and Ca 2+ Cations on Structural Manganese(IV) Oxide for the Aerobic Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid. ACS OMEGA 2023; 8:47846-47855. [PMID: 38144082 PMCID: PMC10733951 DOI: 10.1021/acsomega.3c06333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 12/26/2023]
Abstract
The promising influences of K+ and Ca2+ ions in the development of effective MnO2 for the selective oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid (FDCA) were studied for the catalytic performance under a high-pressure reaction of aqueous O2 (0.5 MPa) in a basic system. Various oxidation states of manganese in MnO2 were able to accelerate the oxidation of 5-formyl-2-furancarboxylic acid to FDCA in the rate-determining step. The results were in good agreement that Ca2+ played a key role in the highest FDCA yield up to 85% due to the associated cations on the local coordination to enhance the high surface area and the electronic effect on the manganese ion. Both K-MnO2 and Ca-MnO2 catalysts showed excellent catalytic activities without a significant change in the efficiency in the reusability experiments.
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Affiliation(s)
- Thinnaphat Poonsawat
- NANOCAST
Laboratory, Center for Catalysis Science and Technology (CAST), Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand
| | - Peerapong Promcharoen
- NANOCAST
Laboratory, Center for Catalysis Science and Technology (CAST), Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand
| | - Titiya Meechai
- Department
of Premedical Science, Faculty of Medicine, Bangkokthonburi University, Thawi Watthana, Bangkok 10170, Thailand
| | - Laksamee Chaicharoenwimolkul Chuaitammakit
- Chemistry
and Applied Chemistry, Faculty of Science and Technology, Suratthani Rajabhat University, 272 Moo 9, Surat-Nasan Road, Khuntale,
Muang, Surat Thani 84100, Thailand
| | - Ekasith Somsook
- NANOCAST
Laboratory, Center for Catalysis Science and Technology (CAST), Department
of Chemistry and Center of Excellence for Innovation in Chemistry,
Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok 10400, Thailand
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2
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Wang WL, Lu H, Wang TB, Wang Y. Studying the Effect of different Temperatures Synthesis of Fe
3
O
4
/MnO
2
Microrobots on Water Remediation. ChemistrySelect 2023. [DOI: 10.1002/slct.202203998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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3
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Zhang D, Yang XA, Jin CZ, Zhang WB. Ultrasonic assisted magnetic solid phase extraction of ultra-trace mercury with ionic liquid functionalized materials. Anal Chim Acta 2023; 1245:340865. [PMID: 36737138 DOI: 10.1016/j.aca.2023.340865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 01/08/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
Due to the agglomeration between particles, the inherent adsorption characteristics of magnetic powder materials are usually difficult to fully display. Taking ionic liquid functional materials as an example, the enrichment behavior of these adsorbents for trace mercury (Hg2+) in ultrasonic (US) assisted dispersion mode was systematically studied. The dissociation of protonic ionic liquids (IL) occur in the process of dispersion and the strong electrostatic attraction can improve the diffusion and adhesion of mercury on the adsorbent surface. Spectral measurement data showed that with the help of US, the more uniform dispersion of magnetic materials accelerated the adsorption of trace Hg2+. Ultrasonic intrinsic parameters such as frequency, power and radiation duration significantly affect the dispersion and apparent adsorption properties of magnetic functional materials. In the range of experimental parameters, the dye/paper image experimental results documents that there is a positive correlation between cavitation effect and ultrasonic frequency/power. The enrichment degree of fixed adsorbate (0.1 μg L-1) under high frequency (59 kHz) or high-power input (100%) is 1-2 times higher than that under low frequency (40 kHz) or low power (60%) input. This is a valuable conclusion for the subsequent study of US dispersion of magnetic and even non-magnetic powder materials. In addition, the in-situ desorption and accurate measurement of adsorbed mercury were realized by combining slurry vapor generation atomic fluorescence spectroscopy (SVG-AFS). The constructed US assisted magnetic solid phase extraction (US-MSPE) method has the characteristics of low detection limit (0.36 ng L-1), high recovery (>90%), sustainable utilization (>3) and reasonable measurement deviation (<5%), which can meet the requirements of ultra-trace Hg2+ (0.01-1.0 μg L-1).
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Affiliation(s)
- Di Zhang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Xin-An Yang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
| | - Cheng-Zhao Jin
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Wang-Bing Zhang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
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4
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Ahmad H, Koo BH, Khan RA. Magnetite β-lactoglobulin@Fe3O4 nanocomposite for the extraction and preconcentration of As(III) species. Microchem J 2022. [DOI: 10.1016/j.microc.2021.106941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Ali N, Hassan Riead MM, Bilal M, Yang Y, Khan A, Ali F, Karim S, Zhou C, Wenjie Y, Sher F, Iqbal HMN. Adsorptive remediation of environmental pollutants using magnetic hybrid materials as platform adsorbents. CHEMOSPHERE 2021; 284:131279. [PMID: 34175517 DOI: 10.1016/j.chemosphere.2021.131279] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 02/07/2023]
Abstract
Effective separation and remediation of environmentally hazardous pollutants are burning areas of research because of a constant increase in environmental pollution problems. An extensive number of emerging contaminants in the environmental matrices result in serious health consequences in animals, humans, and plants, even at trace levels. Therefore, it is of paramount significance to quantify these undesirable pollutants, even at a very low concentration, from the natural environment. Magnetic solid-phase extraction (MSPE) has recently achieved huge attention because of its strong magnetic domain and easy separation through an external magnetic field compared with simple solid-phase extraction. Therefore, MSPE appeared the most promising technique for removing and pre-concentration of emerging pollutants at trace level. Compared to the normal solid-phase extraction, MSPE as magnetic hybrid adsorbents offers the unique advantages of distinct nanomaterials and magnetic hybrid materials. It can exhibit efficient dispersion and rapid recycling when applying to a very complex matrix. This review highlights the possible environmental applications of magnetic hybrid nanoscale materials as effective MSPE sorbents to remediate a diverse range of environmentally toxic pollutants. We believe this study tends to evoke a variety of research thrust that may lead to novel remediation approaches in the forthcoming years.
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Affiliation(s)
- Nisar Ali
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China.
| | - Md Mahamudul Hassan Riead
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Yong Yang
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Adnan Khan
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Farman Ali
- Department of Chemistry, Hazara University, KPK, Mansehra, 21300, Pakistan
| | - Shafiul Karim
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Cao Zhou
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Ye Wenjie
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Science, Monterrey, 64849, Mexico.
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6
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Jiang L, Li Y, Yang XA, Jin CZ, Zhang WB. Ultrasound-assisted dispersive solid phase extraction for promoting enrichment of ng L -1 level Hg 2+ on ionic liquid coated magnetic materials. Anal Chim Acta 2021; 1181:338906. [PMID: 34556225 DOI: 10.1016/j.aca.2021.338906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/12/2021] [Accepted: 08/01/2021] [Indexed: 10/20/2022]
Abstract
Herein, we investigated the enrichment behavior of inorganic mercury (Hg2+) on magnetic adsorbent with different ultrasound (US) energy field input. The enrichment rate of 0.10 μg L-1 mercury is increased by 4.5 times after US instead of stirring as dispersion mode. The input of higher frequency and power ultrasound can accelerate the enrichment of magnetic ionic liquid adsorbent and reduce the Hg2+ residue, importantly, which has not been reported. The positive correlation between cavitation effect and acoustic frequency and power in imaging experiments documents that US parameters are the key factors affecting the magnetic solid phase extraction. In addition, in-situ desorption and detection of adsorbate and recovery of adsorbent can be realized by slurry vapor generation (SVG) technology. The recovery of Hg2+ in four cycles is more than 90%, which indicates that the structure and properties of the material are not affected by the application of US. Hence, the degradation of adsorption properties caused by agglomeration of magnetic materials can be improved by introducing dispersion methods such as US. At the same time, 95% enrichment efficiency and 0.01-1.0 μg L-1 linear calibration range corresponding to 150 mL sample documents that magnetic ionic liquid adsorbent combined with US and sensitive spectral detector can meet the needs of ng L-1 level Hg2+ analysis in natural water samples.
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Affiliation(s)
- Lu Jiang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Ying Li
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Xin-An Yang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
| | - Cheng-Zhao Jin
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
| | - Wang-Bing Zhang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
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7
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Ye H, Wang Y, Liu X, Xu D, Yuan H, Sun H, Wang S, Ma X. Magnetically steerable iron oxides-manganese dioxide core-shell micromotors for organic and microplastic removals. J Colloid Interface Sci 2020; 588:510-521. [PMID: 33429347 DOI: 10.1016/j.jcis.2020.12.097] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 02/06/2023]
Abstract
Because of micro/nanoscale manipulation and task-performing capability, micro/nanomotors (MNMs) have attracted lots of research interests for potential applications in biomedical and environmental applications. Owing to the low-cost, good motion behavior, and environmental friendliness, various low-cost metal oxides based MNMs become promising alternatives to the precious metal based MNMs, in particular for environmental remediation applications. Hereby, we demonstrate the facile and scalable fabrication of two types of bubble-propelled iron oxides-MnO2 core-shell micromotors (Fe3O4-MnO2 and Fe2O3-MnO2) for pollutant removal. The Fe2O3-MnO2 micromotor exhibits efficient removals of both aqueous organics and suspended microplastics via the synergy of catalytic degradation, surface adsorption, and adsorptive bubbles separations mechanisms. The adsorptive bubbles separation achieved more than 10% removal of the suspended microplastics from the polluted water in 2 h. We clarified the major contributions of different remediation mechanisms in pollutants removals, and the findings may be beneficial to a wide range of environmental applications of MNMs.
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Affiliation(s)
- Heng Ye
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yong Wang
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Xiaojia Liu
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Dandan Xu
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Hao Yuan
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Hongqi Sun
- School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, SA 5005, Australia
| | - Xing Ma
- State Key Laboratory of Advanced Welding and Joining, Flexible Printed Electronic Technology Center, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; Shenzhen Bay Laboratory, No. 9 Duxue Road, Shenzhen 518050, China.
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8
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Pan SZ, Jin CZ, Yang XA, Zhang WB. Ultrasound enhanced solid-phase extraction of ultra-trace arsenic on Fe3O4@AuNPs magnetic particles. Talanta 2020; 209:120553. [DOI: 10.1016/j.talanta.2019.120553] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/03/2019] [Accepted: 11/09/2019] [Indexed: 11/27/2022]
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9
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Masudi A, Harimisa GE, Ghafar NA, Jusoh NWC. Magnetite-based catalysts for wastewater treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:4664-4682. [PMID: 31873891 DOI: 10.1007/s11356-019-07415-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
The increasing number and concentration of organic pollutants in water stream could become a serious threat in the near future. Magnetite has the potential to degrade pollutants via photocatalysis with a convenient separation process. This study discusses in detail the control size and morphology of magnetite nanoparticles, and their composites with co-precipitation, hydrothermal, sol-gel, and electrochemical route. Further photocatalytic enhancement with the addition of metal and porous support was proposed. This paper also discussed the technology to extend the lifetime of recombination through an in-depth explanation of charge transfer. The possibility to use waste materials as catalyst support was also elucidated. However, magnetite-based photocatalysts still require many improvements to meet commercialization criteria.
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Affiliation(s)
- Ahmad Masudi
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Grace Erlinda Harimisa
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Nawal Abdul Ghafar
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Nurfatehah Wahyuny Che Jusoh
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
- Center of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia Kuala Lumpur, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia.
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10
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Cheng L, Yang XA, Shi MT, Zhang WB. Rapid extraction of arsenic species from traditional Chinese herbal by dual-frequency ultrasound-assisted enzymatic digestion prior to spectral analysis. J Chromatogr A 2020; 1619:460915. [PMID: 32008824 DOI: 10.1016/j.chroma.2020.460915] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/18/2020] [Accepted: 01/22/2020] [Indexed: 01/06/2023]
Abstract
Considering the huge difference of biological toxicity, it is extremely significant to recognize the exact content of arsenic species in actual samples. In this paper, a novel pretreatment technique for the efficient extraction of arsenic species from herbal samples is developed by dual-frequency ultrasound-assisted enzymatic digestion (DUED). The preservation of arsenic original form, reduction of the actual analysis time, environmental friendliness and free-interference in subsequent detection make this method over the traditional method such as wet digestion, ashing and some solvent extraction technologies. The combination of DUED and atomic fluorescence spectrometry realize the speciation analysis of arsenic in traditional Chinese medicine. The optimizations of experimental parameters have been achieved, and the potential mechanism is discussed. The experimental data showed that cellulase is suitable for the digestion of herbal matrix than α-amylase and papain. Ultrasound can significantly increase the rate of enzymatic hydrolysis of biological molecules, especially under dual-frequency ultrasound irradiation. The highest relative extraction efficiency can be obtained by combining 40 kHz ultrasonic bath (UB) with 20 kHz ultrasonic probe (UP). Two certified reference materials [CRMs, GBW(E)090066 and GBW(E)090067] and four practical herbs were used to evaluate the accuracy and practicability of the method. Inorganic arsenic, including trivalent arsenic and pentavalent arsenic, was the main species in the four herbal samples.
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Affiliation(s)
- Lei Cheng
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Xin-An Yang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
| | - Meng-Ting Shi
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China
| | - Wang-Bing Zhang
- Department of Applied Chemistry, Anhui University of Technology, Maanshan, Anhui, 243002, PR China.
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Yu M, Wang L, Hu L, Li Y, Luo D, Mei S. Recent applications of magnetic composites as extraction adsorbents for determination of environmental pollutants. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.07.022] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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12
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Wang X, Dai J, Wang X, Hu Q, Huang K, Zhao Z, Lou X, Xia F. MnO2-DNAzyme-photosensitizer nanocomposite with AIE characteristic for cell imaging and photodynamic-gene therapy. Talanta 2019; 202:591-599. [DOI: 10.1016/j.talanta.2019.05.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/10/2019] [Accepted: 05/02/2019] [Indexed: 01/22/2023]
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13
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Ahmad H, Haseen U, Umar K, Ansari MS, Ibrahim MNM. Bioinspired 2D carbon sheets decorated with MnFe2O4 nanoparticles for preconcentration of inorganic arsenic, and its determination by ICP-OES. Mikrochim Acta 2019; 186:649. [DOI: 10.1007/s00604-019-3753-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 08/10/2019] [Indexed: 01/07/2023]
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Magnetic graphitic carbon nitride nano-composite for ultrasound-assisted dispersive micro-solid-phase extraction of Hg(II) prior to quantitation by atomic fluorescence spectroscopy. Anal Chim Acta 2019; 1074:33-42. [PMID: 31159937 DOI: 10.1016/j.aca.2019.04.062] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/22/2019] [Accepted: 04/26/2019] [Indexed: 01/01/2023]
Abstract
A nanosheet structure of Fe3O4/g-C3N4 magnetic composite has been prepared and utilized as adsorbent for the ultrasound-assisted dispersive magnetic micro-solid-phase extraction of the ultra-trace inorganic mercury [Hg(II)]. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Fouries transform infrared spectroscopy images manifested that the hydrothermal systhesis promoted the binding of Fe3O4 particles with g-C3N4. The enrichment performance of composites depended on their compositions, and the recovery of Hg(II) on C-m30 (with Fe3O4/g-C3N4 mass ratio 2:3) was higher than that on other ratios. Recorded data showed that ultrasound wave was an effective method for reducing the agglomeration of magnetic materials and enhancing their adsorption properties. The Hg signal obtained by 80% power input is 3.2 times stronger than the signal by strring mode. X-ray diffraction characterization of the recovered adsorbent showed that g-C3N4 needed to be updated after repeated use for four times. In addition, competitive adsorption may be main factor affecting the inhibitory effect of high concentration methylmercury on inorganic mercury. Under the optimized conditions, the detection limit of the proposed method was 1.4 ng L-1 and relative standard deviation of 4.6% for 0.05 μg L-1 Hg(II) was obtained. The linear calibration range was 0.005-0.4 μg L-1. The accuracy of the method was verified through analysis of the certificated reference materials. The proposed method has been applied in the determination of inorganic Hg in natural water samples.
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Capriotti AL, Cavaliere C, La Barbera G, Montone CM, Piovesana S, Laganà A. Recent Applications of Magnetic Solid-phase Extraction for Sample Preparation. Chromatographia 2019. [DOI: 10.1007/s10337-019-03721-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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