International Journal of Electrochemical Science
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2023
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IF 1.5
Shangwang Le,Qian Jiang,Hongcheng Pan
A crystal violet-cadmium hydroxyquinoline iodine (CV-CdqI) nanocomposite was synthesized by adsorbing crystal violet (CV) onto cadmium hydroxyquinoline iodine (CdqI) nanowires. The CdqI nanowires were synthesized by mixing 100 mL of an aqueous 0.03 M CdI 2 solution with 100 mL of a 0.01 M 8-hydroxyquinoline ethanol solution in an ultrasonic bath. Scanning electron microscopy showed that CdqI exhibited a regular nanorod morphology with diameters of 30-60 nm and lengths of 400–600 nm. After adsorbing crystal violet, the CdqI nanowires become aggregated to form the CV-CdqI nanocomposite. X-ray powder diffraction (XRD) revealed that the XRD patterns of the CdqI nanowires and CV-CdqI nanocomposite are essentially the same, and no new phase was generated in the XRD pattern after the adsorption of CV. The fluorescence and photoelectrochemical (PEC) properties of the CV-CdqI nanocomposite were investigated. The CV-CdqI nanocomposite emits a yellow-green fluorescence with a maximum emission at 575 nm, which is similar to that of the CdqI nanowires. PEC measurements showed that the photocurrent response of the CV-CdqI nanocomposite spin-coated FTO electrode was stable and repeatable under the periodic on/off illumination of a 300 W xenon lamp at 0 V bias. Furthermore, the CV-CdqI/FTO electrode was used to construct a sensor for the PEC detection of ascorbic acid (AA). In the range of 1.4 to 10 μM, the photocurrent of the CV-CdqI/FTO electrode was inversely proportional to the concentration of AA with a detection limit of 0.2 μM. The method was used for the determination of AA in oranges (varied from 32.1 to 50.8 mg/100 g fresh weight).
研究领域:
材料科学
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分析化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Yingying Yang,Huiyuan Liu,Miao Wang,Kun Zhao,Jianxue Li,Ke Meng,Lei Tan,Zhimin Chen,Shaohua Liu,Jianwei Fu
Development of porous adsorbents tethered with ionic pendent groups is conducive to establish an efficient dye removal strategy in aqueous solution. Herein, a porous copolymer with carboxyl negative ions, termed as Poly(AA-co-DVB), was fabricated via one-step solvothermal copolymerization of acrylic acid with divinylbenzene and subsequent alkali treatment. Characterizations showed that Poly(AA-co-DVB) was rich in mesoporous structure and had a large specific surface area of 473.6 m 2 g −1 . The prominent structural feature endowed Poly(AA-co-DVB) with a high adsorption capacity of 604.5 mg g −1 for targeted contaminant crystal violet (CV) at 298 K. The influences of various factors on adsorption performance of Poly(AA-co-DVB) for CV were studied in detail. The adsorption process conformed to the Langmuir isotherm, pseudo-second-order kinetic and intraparticle diffusion models, in which the CV removal was endothermic and spontaneous in nature. Coexisting ions Na + and Ca 2+ promoted the CV removal, while Al 3+ suppressed the CV removal. Notably, after four cycles of adsorption–desorption, a slight increase in adsorption capacity was observed, demonstrating the excellent reusability of Poly(AA-co-DVB). The analysis of FT-TR, zeta potential, and XPS revealed that electrostatic attraction and π-π stacking contributed to the CV removal by Poly(AA-co-DVB).
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
RSC Advances
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2019
·Vol. 9
·期 38
·21996-22003
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IF 3.049
Huan Wang,Xin Lai,Wei Zhao,Youning Chen,Xiaoling Yang,Xiaohua Meng,Yuhong Li
In this study, EDTA functionalized corncob (EDTA-corncob) and EDTA/graphene oxide functionalized corncob (EDTA-GO/corncob) were prepared using disodium ethylenediamine tetraacetic acid and the graphene oxide immersion method. EDTA-corncob and EDTA-GO/corncob were characterized by SEM and FTIR spectroscopy. On this basis, the adsorption properties of EDTA-corncob and EDTA-GO/corncob were studied with crystal violet as the adsorbate. The optimum adsorption conditions were determined by the effect of samples on the adsorption properties of crystal violet at different times, temperatures and pH, and the reusability of the samples was studied. The results showed that adsorption capacity of crystal violet on EDTA-GO/corncob was higher compared with natural corncob and EDTA-corncob. The most suitable pH value of the solution is about 6.0, the adsorption equilibrium time is 200 min. EDTA-GO/corncob can be reused eight times. This study indicated that EDTA-GO/corncob is a reusable adsorbent for rapid, low-cost, and efficient removal of dye from waste water.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2021
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IF 3.978
Yaru Zhang,Jing Ren,Quan Wang,Shuxiang Wang,Shuna Li,Hongya Li
In the current work, studies were conducted for understanding oxidation characteristics and biodegradation potential of a dye-decolorizing peroxidases from Bacillus amyloliquefaciens (BaDyP) for triphenylmethane dye crystal violet (CV). Recombinant BaDyP from Bacillus amyloliquefaciens MN-13 exhibits a broad substrates profile. It can oxidize ABTS, veratryl alcohol, Mn 2+ , azo dye reactive black 5, anthraquinone dye reactive blue 19, but cannot oxidize guaiacol. The maximum BaDyP activity against ABTS was obtained at 30 ℃ and pH 4.0. When CV was treated by BaDyP for 72 h, the degradation percentage of 63.0 % was observed. UV–vis spectra and HPLC/MS analysis indicated that CV degradation occurred via N -demethylation and cleavage of conjugated chromophore structure. The identified degradation products included stepwise N -demethylated intermediates during the N -demethylation of CV and, 4-( N -methylamino)-4′-( N ’-methylamino) benzophenone and 4-( N -methylamino)-4′-amino benzophenone after cleavage of conjugated chromophore structure. Based on these data, a hypothetic mechanism of CV degradation mediated by BaDyP was proposed in this study. Finally, it is worth to be noted that BaDyP possessed high decolorization efficiency (72.3 % removal ADMI) for actual dye effluent. These results demonstrated that BaDyP might be used as an efficient biocatalyst for the enzymatic pretreatment of dyes in wastewater.
研究领域:
环境科学
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生物技术
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酶学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
G. Zhou,K.P. Wang,H.W. Liu,L. Wang,X.F. Xiao,D.D. Dou,Y.B. Fan
Owing to low bearing capacity and efficiency, traditional filters or adsorbents for removal of contaminants like crystal violet (CV) dye required frequent replacement. Besides, the combination of three-dimensional (3D) printing and bionics could break the constraints of traditional configuration. In this study, a novel depth-type hybrid polylactic acid (PLA)@graphene oxide (GO)/chitosan (CS) sponge filter with bionic fish-mouth structure was prepared and fabricated, assisted by 3D printing and double freeze-drying technology, according to the theories of vertical cross-step filtration and swirling flow. And GO/CS sponge and its filtering device were characterized by FITR, SEM, water adsorption and so on. Moreover, it was explained that the impact factors on dye removal mechanism, like GO content (or CS content), contact time, pH, temperature and bionic configuration. As a result, the bionic 3D filtering device demonstrated excellent removal efficiency (97.8 ± 0.5% for CV) and GO/CS sponge exhibited higher strength (74.5 ± 3.5 MPa) at the condition of GO content of 9 wt%, contact time of 46 min, pH of 8 and 35 °C, respectively. Therefore, the resulting 3D PLA@GO/CS sponge bionic filter via gravity and vortex driving provided new alternatives for effectively dye-water separation, and it showed great promise for application of biological macromolecules in adsorption.
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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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Runze Zhang,Kexin Liu,Fangran Jia,Tianci Xu,Yongjie Yang
Leuco-malachite green (LMG) and leuco-crystal violet (LCV) are widespread co-pollutants in aquatic products that pose a severe threat to human health. Therefore, it is urgent and challenging to develop rapid multiplex detection of LMG and LCV. Herein, the bispecific aptamer (A5b) for LMG and LCV was characterized. Its dissociation constant (Kd) was 2.03 ± 0.13 μM for LMG and 0.97 ± 0.06 μM for LCV. Then, we used A5b as a sensing probe to develop a label-free colorimetric aptasensor using gold nanoparticles (AuNPs) as an indicator and poly-diallyl dimethylammonium chloride (PDDA) as an aggregation inducer. In the absence of LMG and LCV, PDDA hybridized A5b via electrostatic interaction to form a “duplex” structure, which failed to induce the aggregation of AuNPs. However, in the presence of LMG or LCV, A5b specifically bound to LMG or LCV, releasing PDDA. The free PDDA then induced the aggregation of AuNPs. Consequently, a visible color change from red to blue was observed with increasing LMG/LCV concentration. This sensor exhibited excellent sensitivity and bispecificity, and a limit of detection (LOD) of 77.9 nM for LCV and 123.1 nM for LMG, with a linear concentration range of 1–6 μM for LCV and 1–8 μM for LMG. Additionally, the potential of this sensor for real-world applications was well demonstrated in crucian samples. Overall, this work provided a bispecific affinity probe for LMG and LCV for the first time and reported a label-free colorimetric aptasensor for multiplex detection of LMG and LCV in aquatic products.
研究领域:
分析化学
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环境科学
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食品安全
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产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2015
·Vol. 10
·期 9
·447-451
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IF 0.853
Yaping Zhong,Xue Wang,Yu He,Yili Ge,Gongwu Song
Graphene/silica magnetic nanocomposites are synthesised and introduced as new and reusable adsorbents for rapid and high-efficiency preconcentraton trace amounts of dye pollutants in water. This method is simple, fast, cheap and non-toxic. The optimum adsorption conditions for the preconcentraton of crystal violet (CV) and malachite green (MG) are investigated and the adsorption mechanisms are also discussed. The regeneration and reuse experiments showed the good reusability of the as-prepared adsorbent. In addition, this method was successfully applied to the preconcentraton of trace amounts of MG and CV from water samples, which presages more opportunities for application in environmental and material sciences.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Xiaoxun Liu,Jilin Zhang,Yi Cheng,Xiaoya Zhao,Zi Dai,Guixia Liu
The adsorption of organic dyes by sorbents is one of the effective ways to resolve the problem of dye wastewater treatment . However, the limited adsorption capacity of adsorbents has always been a crucial factor that plagues the development and utilization of adsorbents. Herein, aiming at efficient adsorption for crystal violet (CV), polyacrylic acid (PAA) was incorporated into zeolitic imidazoline frameworks (ZIF-67) through an easy and environmentally friendly aqueous phase synthesis process at room temperature to synthesize adsorbent ZIF-67-PAA. Compared to pure ZIF-67, the obtained adsorbent ZIF-67-PAA showed excellent adsorption performance and the maximum adsorption capacity of CV can reach 1606 mg g −1 . The adsorption process is spontaneous and conformed to the Langmuir isotherm model and the pseudo-second-order kinetic model . The results show that the prepared ZIF-67-PAA is a potential and efficient adsorbent for CV removal.
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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产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 45
·2103424
·
IF 13.281
Huan Gao,Xuan Wei,Meize Li,Lei Wang,Tianxiang Wei,Zhihui Dai
Exploring new electrochemiluminescence (ECL) luminophores to construct high-efficiency sensing systems is always a hot direction for developing ECL sensors. Compared with other luminophores, metal–organic frameworks (MOFs) exhibit high mass transfer ability for accelerating the reactivity in its pore channels, which is conducive to improving the performance of ECL sensors. In this work, La 3+ -BTC MOFs (LaMOFs) are prepared as the highly active reactor and novel ECL luminophore. On this basis, a novel co-quenching effect mechanism is proposed based on double-stranded DNA (dsDNA) triggered cooperation between LaMOFs and crystal violet (CV) molecules. Under the confined pore channels of LaMOFs, CV can play an important role as the photon-acceptor due to the matched absorption spectrum with the ECL spectrum of LaMOFs, and the electron-acceptor on account of its lowest unoccupied molecular orbital level. Based on the proposed co-quenching effect mechanism, a constructed ECL gene sensor shows good assay performance toward p53 gene in the detection range of 1 p m to 100 n m with a detection limit of 0.33 p m . The co-quenching effect integrating LaMOFs with CV is expected to be a versatile approach in the construction of ECL gene sensor, which has good prospect in expanding the application range of ECL technology.
研究领域:
分析化学
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生物医学工程
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DOI
PubMed
高影响因子
Analytical Methods
·
2023
·
IF 3.1
Yuxuan Bai,Mingwang Liu,Yu He,Gongwu Song
Recent years have witnessed the ever-increasing achievements of Ti3C2 MXene quantum dots (Ti3C2 MQDs) and their vital contributions to fluorescent biosensing. However, the applicability and flexibility of most Ti3C2 MQDs-based sensors are limited by their emission of a single blue wavelength. To address this issue, we present a facile strategy to utilize carbon dots as the model to construct a ratiometric fluorescent sensor based on fluorescence resonance energy transfer to quantitatively monitor crystal violet. The fabricated probe exhibited dual emission at 440 and 565 nm respectively, when introducing crystal violet, the peak at 565 nm was quenched but 440 nm remained constant. Further aiming for portable, convenient, and on-site analysis, an innovative smartphone-assisted platform provides promising perspectives on the future in-situ quantitation. This work creates a general strategy for constructing the Ti3C2 MQDs-based composite fluorescent system, as well as suggests great application potential in food security monitoring.
研究领域:
材料科学
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分析化学
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食品安全
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产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2016
·Vol. 9
·期 11
·3044-3052
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IF 2.167
Tang Jing,Wang Wei,Zheng Shengbiao,Zhang Yan,Wei Jumeng,Wang Jianfei
The synthetic phenolic antioxidant tert-butyl hydroquinone (TBHQ) is frequently associated to adverse health effects. A polymerized film of crystal violet (CV) was prepared on the surface of a glass carbon electrode (GCE) by electropolymerization in alkaline solution, and then the modified electrode was successfully used to determine TBHQ. This electrode was characterized by scanning electron microscopy and electrochemical impedance spectra. The voltammetric behavior of TBHQ over an extended pH range using cyclic voltammetry at poly (crystal violet) modified glassy carbon electrode (PCV/GCE) was also studied. The resulting electrode exhibited excellent electrocatalytic activity towards the oxidation of TBHQ, and this was confirmed by the observed increased redox peak currents and shifted potentials. The electrochemical sensor can be applied to the quantification of TBHQ with a linear range covering 5 × 10 −7 –1 × 10 −4 mol · L −1 (with a correlation coefficient of 0.9969) and the limit detection was 3 × 10 −8 mol · L −1 (S/N = 3). The recovery was between 97.1 and 102 % in edible oil samples. The electrochemical sensor method was also compared with a HPLC method, which proves its capability in commercial market surveillance.
研究领域:
分析化学
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食品科学
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2017
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IF 5.715
Pengfei Sun,Cai Hui,Rashid Azim Khan,Xiaoxiao Guo,Shengmao Yang,Yuhua Zhao
Kaolin has potential in wastewaters treatment due to its advantage of nontoxicity to aquatic flora and fauna. However, its adsorption capacity needs significant improvement, in addition, the re-collection of adsorbents after application can reduce the risk of desorption of pollutants. Therefore, nanoparticle-modified kaolin (NMK) was prepared by coating kaolin with Fe 3 O 4 nanoparticles to enhance the adsorption capacity of kaolin for crystal violet (CV) in this study. Fe 3 O 4 nanoparticles improved the adsorption capacity of kaolin by at least an order of magnitude, with a maximum capacity of 247.68 ± 4.56 mg CV/g NMK with the initial CV concentration of 800 mg/L; additionally, nanoparticles endowed NMK a magnetization of 21.20 emu/g, indicating that NMK has a magnetic re-collection potential. Spectroscopic analysis demonstrates that the epoxy groups in kaolin are likely the link to the nanoparticles, and the aromatic C C and C O groups of NMK could be responsible for CV adsorption. The enhanced adsorption capacity mechanism of NMK is attributed to nanoparticles decreased zeta potential and changed porous surface characteristics of virgin kaolin. The results suggest that some materials can become more effective in environmental applications via modification by nanoparticles.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）