查找使用阿拉丁产品的科研文献

Study on Preparation of Chitosan/Polyvinyl Alcohol Aerogel with Graphene−Intercalated Attapulgite(GO−ATP@CS−PVA) and Adsorption Properties of Crystal Violet Dye

Weikai Sun,Hongxiang Ou,Ziwei Chen

Adsorption is one of the effective methods of treating dye wastewater. However, the selection of suitable adsorbent materials is the key to treating dye wastewater. In this paper, GO−ATP was prepared by an intercalation method by inserting graphene oxide (GO) into the interlayer of alabaster attapulgite (ATP), and GO−ATP@CS−PVA aerogel was prepared by co−blending−crosslinking with chitosan (CS) and polyvinyl alcohol (PVA) for the adsorption and removal of crystalline violet dye from the solution. The physicochemical properties of the materials are characterized by various methods. The results showed that the layer spacing of the GO−ATP increased from 1.063 nm to 1.185 nm for the ATP, and the specific surface area was 187.65 m2·g−1, which was 45.7% greater than that of the ATP. The FTIR results further confirmed the success of the GO−ATP intercalation modification. The thermogravimetric analysis (TGA) results show that the aerogel has good thermal stability properties. The results of static adsorption experiments show that at 302 K and pH 9.0, the adsorption capacity of the GO−ATP@CS−PVA aerogel is 136.06 mg·g−1. The mass of the aerogel after adsorption−solution equilibrium is 11.4 times that of the initial mass, with excellent adsorption capacity. The quasi−secondary kinetic, Freundlich, and Temkin isotherm models can better describe the adsorption process of the aerogel. The biobased composite aerogel GO−ATP@CS−PVA has good swelling properties, a large specific surface area, easy collection and a low preparation cost. The good network structure gives it unique resilience. The incorporation of clay as a nano−filler can also improve the mechanical properties of the composite aerogel.

A semiconductor SERS sensor of corrosion-resistant PPy/GO composite film by electrochemical growth for detecting crystal violet residues in fresh fish tissue

Xishun Peng,Qixin chen,Xinghua Li,Li Yang,Yiheng Yuan,Cheng Zuo,Zhangyu Zhou,Zhongchen Bai

Crystal violet (CV) residues in Marine food have produced a severe health threat in human life. In this study, we proposed a semiconductor surface-enhanced Raman scattering (SERS) sensor of corrosion-resistant Polyaniline/Graphene oxide (PPy/GO) film by electrochemical growth method to detect CV residues in fresh fish tissue. A PPy/GO dispersion solution was one-step deposited on a stainless steel sheet surface by electrochemical polymerization process to form a PPy/GO composite film acting as a semiconductor SERS substrate. Since the substrate of PPy/GO film was mainly composed of GO sheet without other metals, it had a good corrosion resistance. The SERS enhancement factor and charge transfer intensity P CT of PPy/Go SERS substrate for CV molecules were up to 1.18 × 10 6 and 0.903, respectively. Furthermore, the limit of detection ( LOD ) of PPy/GO SERS substrate could reach 1.58 nM. In addition, SERS sensor of PPy/GO film could identify CV residues in fresh fish tissues, and its recovery rate was 91.8 %–107 %. This preparing method and detecting method we proposed PPy/GO SERS substrate provide a new pathway for detecting CV residues in Marine food.

Hexafluorobutanol primary alcohol ethoxylate-based supramolecular solvent formation and their application in direct microextraction of malachite green and crystal violet from lake sediments

Yu Yang,Pai Nanya,Chen Xiaoya,Wang Baoling,Gao Shulin,Ge Dandan

A new type of hexafluorobutanol (HFB) primary alcohol ethoxylate (AEO)-based supramolecular solvent (SUPRAS) with density higher than water was prepared for the first time. HFB acted as AEO micelle-forming agent and density-regulating agent for SUPRAS formation. The prepared SUPARS was applied as extraction solvent for vortex-assisted direct microextraction of malachite green (MG) and crystal violet (CV) from lake sediment followed by high-performance liquid chromatographic determination. In the present work, SUPRASs prepared from AEO with different carbon chains as the amphiphiles and various coacervation agents were investigated. SUPARS formed from MOA-3 and HFB provided better extraction efficiency in comparison with other SUPRASs. Parameters influencing the extraction recovery of target analytes including the type and volume of AEO, volume of HFB, and vortex time were investigated and optimized. Under optimized conditions, linearity in the range of 2.0–400 μg g −1 for MG and 2.0–500 μg g −1 for CV with a correlation coefficient higher than 0.9947 was obtained. Limits of detection of 0.5 μg g −1 and relative standard deviations in the range of 0.9–5.8% were obtained. Compared to conventional extraction techniques for analysis of analytes in solid samples, the proposed method reduced sample usage and eliminated a primary extraction process by using a toxic organic solvent. The proposed method is simple, fast, and green and can be used for the analysis of target analytes in solid samples. Graphical Abstract

Removal of hazardous crystal violet dye by low-cost P-type zeolite/carbon composite obtained from in situ conversion of coal gasification fine slag

Yu-Hua Wu,Kai Xue,Qiao-Ling Ma,Ting Ma,Yu-Long Ma,Yong-Gang Sun,Wen-Xin Ji

As the bulk of solid waste from coal chemical industry, coal gasification fine slag (CGFS) mainly consists of aluminosilicates and residual carbon. Currently, the common transformation strategy for CGFS entails the preparation of porous materials. However, this method utilizes only a part of the effective components in the slag. Specifically, either the silicon is used to synthesize zeolites , or the porous carbon is obtained through intensified separation. Therefore, it is highly desirable to achieve the simultaneous utilization of silicon and carbon resources in CGFS. In this work, CGFS was used as a low-cost raw material to prepare the P-zeolite/carbon composite in situ. The composite was characterized via XRD , 27 Al and 29 Si NMR, SEM, FT-IR, and Raman technique. Furthermore, the adsorption removal of crystal violet onto the composite was studied. The adsorption capacity was as high as 625.00 mg g −1 , which was much larger than the CGFS and most reported adsorbents.

Combining portable mass spectrometer with bamboo stir bar sorptive extraction for the on-site detection of malachite green, crystal violet and their metabolites in fishes

Yuxia Shen,Wei Xiong,Qiqin Wang,Wentian Zhang,Hongzhen Xie,Yuting Cao,Qing Xu,Luhong Wen,Ning Gan

In this work, a disposable and inexpensive bamboo stir bar containing an organic membrane was constructed to perform stir bar sorptive extraction (SBSE), followed by portable mass spectrometry to achieve on-site detection of four residual drugs (malachite green, crystal violet and their metabolites) in fishes. The entire method uses only microliter quantities of organic solvents, enabling environmentally friendly pretreatment. The portable mass spectrometer can simultaneously detect four target analytes in a sample in approximately ten seconds. Under the optimal conditions, the proposed method was successfully applied to simultaneously detect four drugs in fish samples with detection limits of 0.16-0.59 µg/kg. The spiked recoveries for mandarin fish and lateolabrax maculatus were 74.5-96.5%, with relative standard deviations (RSD) of 4.4-16%. In addition, the matrix effects of the four analytical targets in the method were experimentally verified to range from 7.30% to 20.62%. The method can potentially be extended to the on-site detection of other veterinary drug residues in foods.

Fabrication of paper-based SERS substrates by spraying silver and gold nanoparticles for SERS determination of malachite green, methylene blue, and crystal violet in fish

Yang Guohai,Fang Xuejiao,Jia Qin,Gu Haixin,Li Yunpeng,Han Caiqin,Qu Lu-Lu

A disposable surface-enhanced Raman scattering (SERS) substrate was prepared by successively spraying silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) onto commercial filter paper using an inexpensive consumer sprayer. The strong surface enhancement of AgNPs and chemical stability of AuNPs can be advantageously combined. The substrate exhibited excellent SERS activity for malachite green (MG), methylene blue (MB), and crystal violet (CV) under 785-nm excitation, with limits of detection (LODs) of 4.3 × 10 −9 , 2.0 × 10 −8 , and 8.1 × 10 −8  M, respectively. The substrate exhibited long-term stability, and it can be stored under ambient conditions for 4 weeks with a relative standard deviation of less than 3% among peak intensities. The substrate also showed good reproducibility with a relative standard deviation of 7.1% among different substrate peak intensities. The substrates enable on-site determination of residual fishery drugs and distinguish MG, MB, and CV mixtures in spiked fish within 5 min, and the average recoveries in fish scales and fish meat were better 90.1% and 76.9%, respectively. The method exhibited rapidity, simplicity, and high sensitivity and is expected to be used for the screening of additives in food.

Magnetic solid-phase extraction based on Fe3O4/graphene oxide nanoparticles for the determination of malachite green and crystal violet in environmental water samples by HPLC

Leilei Zhang,Yiying Zhang,Yurong Tang,Xiaorong Li,Xinfeng Zhang,Chaobi Li,Shuxia Xu

Carboxyl-functionalized covalent organic frameworks for the extraction of malachite green and crystal violet in environmental water samples prior to quantification by high-performance liquid chromatography

Bingmei Lai,Haoyun Hu,Ningli Tang,Yipeng Huang,Guihua Ruan

In this study, monodisperse, uniform, and spherical covalent organic frameworks (COFs) were synthesized using 1,3,5-tris (4-aminophenyl) benzene and 1,3,5-tricarboxaldehyde benzene at room temperature. Post-modification of 6-aminocaproic acid on the COFs yielded carboxyl-modified COFs (COFs-COOH). The modification enhanced the hydrophilicity and adsorption efficiencies of COFs-COOH for malachite green (MG) and crystal violet (CV). A COFs-COOH-based dispersive solid-phase extraction coupled with high-performance liquid chromatography was developed for the analysis of MG and CV. The method showed a linear range from 10 to 1000 ng/mL with detection limits of 1.82 and 0.70 ng/mL for MG and CV detection, respectively. The recoveries of MG and CV from water samples collected from fish farms and markets ranged from 91.63% to 107.10% with relative standard deviations below 5%. Reproducibility tests demonstrated that the adsorption efficiencies of COFs-COOH were maintained at above 85.86% over 15 cycles. The study verified the potential of COFs-COOH as sorbents for the enrichment and separation of triphenylmethane dyes from complex samples.

Robust polydimethylsiloxane-polydopamine coated stir bar for rapid extraction of malachite green, crystal violet and their metabolites in aquatic waters and determined by portable mass spectrometry

Jinya Cao,Yuxia Shen,Zhaixin Liu,Shanshan Zhu,Huihui Wu,Yali Dang,Tianhua Li,Ning Gan

Triphenylmethane (TPM) fish drug residues and their metabolites exist in many aquiculture waters and can cause significant harm to consumers. Rapid, accurate, and simultaneous detection of their residues in foods is significant in protecting the safety of aquatic products. In the study, a new type of polydopamine coated polydimethylsiloxane (PDMS-PDA) stir bar was prepared for the automatic sorptive extraction and enrichment of malachite green, leucomalachite green, crystal violet, and leucocrystal violet which are common TPM drugs used in aquaculture. The surface of PDMS matrix was first turned to hydrophilic by plasma treatment to enhance the evenness and stability of PDA coating. Therefore, the PDMS-PDA stir bar can enhance its extraction capacity and selectivity towards TPMs. These were due to the synergisitic adsorption capacities of PDA and PDMS towards the dyes. A hand-held stirring device was installed with the stir bar for on-site extraction. After that, a portable mass spectrometer directly detected the eluted targets without chromatography separation. Under the optimized conditions. The four analytes' lower detection limit of 0.16–0.38 μg L -1 was obtained. Within 35 min, the stir bar device, combing with a portable mass spectrometer, was used for rapid pretreatment and real sample analysis of four analytes with a recovery of 84.3–110 %. All these prove that the assay exhibited potential application prospects for the on-site detection of TPM residues in aquatic waters.

3D printed triboelectric nanogenerator self-powered electro-Fenton degradation of orange IV and crystal violet system using N-doped biomass carbon catalyst with tunable catalytic activity

Yingzheng Zhu,Miao Tian,Ye Chen,Yingjie Yang,Xupo Liu,Shuyan Gao

Self-powered electro-Fenton (EF) degradation systems based on triboelectric nanogenerator (TENG) technology supply one constructive approach for organic pollution degradation in energy-saving and environmental-friendly manners. Herein, a novel self-powered EF degradation system was built via combining 3D printed flexible multilayered triboelectric nanogenerator (PFM-TENG) with the N-doped porous carbon materials as EF cathode catalysts. The PFM-TENG has a simple multilayered structure but high output characteristics that V oc , I sc , Q tr , P density are 450.0 V, 1.9 mA, 2.9 μC, and 5.1 W m −2 , respectively. Besides, the as-prepared cathode carbon materials feature a high surface area of 1790.8 m 2 g −1 , the total doping content of N, O is up to 20.6 at.%. Driven by PFM-TENG, the EF degradation efficiencies of orange Ⅳ and crystal violet are up to 96.0% and 95.4% in 60 min, respectively. It is noteworthy that there is a positive correlation between the content of –C–O–C functional groups and the degradation efficiency through the analysis of the structure-activity relationship of the carbon materials catalysts. This work realizes the high-efficiency degradation of orange IV and crystal violet through the combination of N-doped carbon catalyst design and 3D printed triboelectric nanogenerator, which not only provides ideas for the preparation of N-doped carbon catalytic materials with controllable catalytic activity , but also proposes an innovative scheme for the layout of the future-oriented EF degradation systems and even the other electrochemical systems via self-powered, digital, mass-produced, distributed, and environmental manners.

Development of magnetic matrix solid phase dispersion method for the extraction of crystal violet and rhodamine B from sediments based on magnetic ZIF-8 and a deep eutectic solvent

Yang Yu,Peng Li,Guohai Zheng,Liwei He,Dandan Ge,Zhehui Weng

A magnetic matrix solid phase dispersion (MSPD) method based on magnetic ZIF-8 (SDS@MZIF-8) and a deep eutectic solvent was developed and used to the extraction of crystal violet and rhodamine B in lake sediments. SDS@MZIF-8 was prepared and used as the extraction sorbent and dispersant in MSPD. The magnetic property of MZIF-8 facilitated the recovery of the extraction sorbent after the blending step. Hydrophilic deep eutectic solvents were prepared and used as efficient green dispersing solvents in MSPD. The use of magnetic sorbent in MSPD is simple and fast, eliminating some additional steps commonly used in the classical MSPD and shortening the extraction time. The parameters influencing the extraction efficiency were investigated and optimized. Under the optimized conditions, the intra- and inter-day relative standard deviations were less than 4.9 %. The linearity ranged from 2-400 µg g −1 with coefficients of determination higher than 0.9943. The detection and quantification limits of RB and CV varied between 0.3–0.5 μg g −1 and 1.0–1.8 μg g −1 , respectively. Finally, the developed method was applied to the analysis of RB and CV in the sediment samples. The recoveries ranged from 93.2 to 107.3 % and the relative standard deviations ranged from 0.8 to 4.9 %. The results suggest a high potential use of the proposed method to determine the organic pollutants in solid samples. Compared with the conventional MSPD extraction technique, the developed method considerably reduced the sample and solvent consumption, offering important environmental benefits.

NiO/ZnO-Coated Carbon Microspheres for Dispersive Solid-Phase Extraction (DSPE) of Malachite Green and Crystal Violet in Aquatic Food Products with Determination by Ultra-High-Performance Liquid Chromatography (UPLC)

Zheqi Fei,Baisen Chen,Xuemei Wei,Lili Lian,Xiyue Wang,Dawei Lou

Developing highly efficient adsorbents toward trace pollutant analysis in complex biological samples is a challenge in analytical chemistry. Herein, NiO/ZnO-coated carbon microspheres (denoted by NiO/ZnO@C) with a well-defined core–shell structure were prepared through hydrothermal treatment and subsequent pyrolysis in air to enrich malachite green (MG) and crystal violet (CV). Hydrophilic carbon microspheres played an important role in the formation of core–shell NiO/ZnO@C, which may lead to the deposition of Ni2+/Zn2+ upon the surface via acidic chelating ligands. Based on the Langmuir model, NiO/ZnO@C demonstrated high adsorption capacities of 333.3 and 192.3 mg/g for MG and CV, respectively. Moreover, the NiO/ZnO@C composite served as a dispersive solid-phase extraction adsorbent to determine MG and CV in aquatic products combined with ultra-high performance liquid chromatography. High linearity was obtained for analyte concentrations from 5 to 500 μg/L with correlation coefficients (r) exceeding 0.9991. The limits of detection of the method were 0.50 μg/L (MG) and 0.35 μg/L (CV) with relative standard deviations less than 7.47%. Furthermore, the developed method was employed to determine MG and CV in aquatic products.