One-step synthesis of a Methylene Blue@ZIF-8-reduced graphene oxide nanocomposite and its application to electrochemical sensing of rutin

Wang, Zonghua; Yu, Gege; Xia, Jianfei; Zhang, Feifei; Liu, Qingyun

doi:10.1007/s00604-018-2796-4

Cited by 27 publications

(8 citation statements)

References 35 publications

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“…The micromorphology, sizes, and elemental composition of the mineral precipitates cultured for 14 days were further analyzed by SEM (Hitachi S-4800, Hitachi, Tokyo, Japan) [69][70][71][72][73][74][75][76] and EDS (Apollo XLT SDD, EDAX, New York, NY, USA) after the mineral precipitates were coated with platinum (Pt) powder. The minerals in the control group B at Mg/Ca molar ratio of 0 were also analyzed according to the same steps.…”

Section: Characterization Of the Extracellular Mineral Precipitatesmentioning

confidence: 99%

Mechanism of Biomineralization Induced by Bacillus subtilis J2 and Characteristics of the Biominerals

et al. 2019

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Biomineralization induced by microorganisms has become a hot spot in the field of carbonate sedimentology; however, the mechanisms involved still need to be explored. In this study, the bacterium Bacillus subtilis J2 (GenBank MG575432) was used to induce the precipitation of calcium carbonate minerals at Mg/Ca molar ratios of 0, 3, 6, 9, and 12. Bacillus subtilis J2 bacteria released ammonia to increase pH, but the ammonia released only made the pH increase to 8.25. Carbonic anhydrase was also produced to catalyze the hydration of carbon dioxide, and this process released carbonate and bicarbonate ions that not only increased pH but also elevated carbonate supersaturation. The biominerals formed at a Mg/Ca molar ratio of 0 were spherulitic, elongated, dumbbell-shaped, and irregularly rhombohedral calcite; at a Mg/Ca molar ratio of 3, the biominerals were calcite and aragonite, the weight ratio of calcite decreased from 26.7% to 15.6%, and that of aragonite increased from 73.3% to 84.4% with increasing incubation time. At higher Mg/Ca molar ratios, the biominerals were aragonite, and the crystallinity and thermal stability of aragonite decreased with increasing Mg/Ca molar ratios. FTIR results showed that many organic functional groups were present on/within the biominerals, such as C–O–C, N–H, C=O, O–H, and C–H. HRTEM-SAED examination of the ultra-thin slices of B. subtilis J2 bacteria showed that nano-sized minerals with poor crystal structure had grown or been adsorbed on the EPS coating. The EPS of the B. subtilis J2 strain contained abundant glutamic acid and aspartic acid, which could be deprotonated in an alkaline condition to adsorb Ca2+ and Mg2+ ions; this made EPS act as the nucleation sites. This study may provide some references for further understanding of the mechanism of biomineralization induced by microorganisms.

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Section: Characterization Of the Extracellular Mineral Precipitatesmentioning

confidence: 99%

Mechanism of Biomineralization Induced by Bacillus subtilis J2 and Characteristics of the Biominerals

et al. 2019

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“…As it is clear, Ipa decreases with decreasing rutin concentration, and nally reaches a minimum at a concentration of 100 nM, and there is almost no current at concentrations below 100 nM. In general, it can be said that the detection limit of the proposed sensor is 100 nM rutin, which is almost a competitive and appropriate value compared to previous works [13,[35][36][37][38][39]. This good sensitivity results can be related to the synergistic effect between rGO and NiFe 2 O 4 nanoparticles.…”

Section: Quantitative Analysis Of Rutin By Dpvmentioning

confidence: 60%

Electrochemical determination of rutin by using NiFe2O4 nanoparticles loaded reduced graphene oxide

Askari

Salarizadeh

Askari

2021

Preprint

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A binary transition metal oxide based on nickel and iron (NiFe2O4) and hybridization of this nanomaterial with reduced graphene oxide (rGO) are synthesized by the hydrothermal method. X-ray diffraction (XRD), and Raman spectroscopy confirm the successful synthesis of these materials. Also, scanning electron microscope (SEM) and transmission electron microscope (TEM) images illustrated the particle morphology with the particle size of 20 nm. The synthesized material is then examined as a sensor on the surface of the glassy carbon electrode to detect a very small amount of rutin .Some electrochemical tests such as cyclic voltammetry, differential pulse voltammetry, impedance spectroscopy indicate the remarkable accuracy of this sensor and its operation in a relatively wide range of concentration of rutin (100 nM-100 µM). Considering the very good results, it seems the NiFe2O4-rGO can be considered as a new proposal in the development of accurate and inexpensive electrochemical sensors.

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“…The calculated values of LOD and LOQ are found to be 8.31 nM and 27.70 nM, respectively. The obtained LOD and the RT sensor are compared with the previous reports and the corresponding data are tabulated in Table 2 [28,32–46] . This comparison analysis shows that, the prepared sensor and used method provides acceptable LOD for the detection of RT.…”

Section: Resultsmentioning

confidence: 87%

Electrochemically Polymerized DL‐Phenylalanine‐Deposited Graphene Paste Electrode for the Detection of Rutin

et al. 2023

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The sensitive, economical, green, and simple voltammetric sensor for the detection of the redox behaviour of rutin (RT) was prepared by the electrochemical polymerization approach. The constructed polymerized DL-phenylalanine (DL-PN) modified graphene paste electrode (MGPE) and bare graphene paste electrode (BGPE) were elucidated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), electrochemical impedance spectroscopic (EIS) and field emission scanning electron microscopic (FE-SEM) approaches. The analysis of RT in phosphate-buffered saline (PBS) of pH 6.5 was demonstrated by the application of a modified electrode (Poly(DL-PN)MGPE) with higher electrocatalytic activity and active sites as compared to BGPE. The important electrochemical parameters such as the influence of PBS, pH, scan rate, and concentration of RT on Poly(DL-PN)MGPE were evaluated. The variation of scan rate and PBS pH assessment discloses that the RT redox nature at Poly(DL-PN)MGPE surface has proceeded via pH-dependant and adsorption-controlled pathways. The Poly(DL-PN)MGPE senses RT in the range from 0.2 to 10.0 μM with a lower limit of detection (LOD) value of 8.31 nM and a limit of quantification (LOQ) of 27.70 nM. The Poly(DL-PN)MGPE shows excellent reproducibility, antifouling nature, repeatability, and stability for the detection of RT. Also, the Poly(DL-PN)MGPE analytical applicability was discussed for RT detection in citrus fruit juice samples.

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One-step synthesis of a Methylene Blue@ZIF-8-reduced graphene oxide nanocomposite and its application to electrochemical sensing of rutin

Cited by 27 publications

References 35 publications

Mechanism of Biomineralization Induced by Bacillus subtilis J2 and Characteristics of the Biominerals

Mechanism of Biomineralization Induced by Bacillus subtilis J2 and Characteristics of the Biominerals

Electrochemical determination of rutin by using NiFe2O4 nanoparticles loaded reduced graphene oxide

Electrochemically Polymerized DL‐Phenylalanine‐Deposited Graphene Paste Electrode for the Detection of Rutin

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