A High Throughput and High Selective Chemiluminescence Method for Quantification of Bifenthrin Based on Molecularly Imprinted Film

2011 ◽  
Vol 306-307 ◽  
pp. 663-666 ◽  
Author(s):  
De Jin Zang ◽  
Lei Ge ◽  
Pei Ni Zhao ◽  
Jing Hua Yu ◽  
Jia Dong Huang
Keyword(s):  
High Throughput ◽  
Sol Gel ◽  
Three Dimensional ◽  
Food Samples ◽  
Chemiluminescence Method ◽  
Molecularly Imprinted ◽  
Equilibrium Binding ◽  
Dimensional Network ◽  
Gel Film ◽  
Molecularly Imprinted Film

One novel highly cross-linked, shape-controllable molecularly imprinted sol-gel film (MISF) with good thermal and chemical stability and three-dimensional network porous structure has been developed. The binding characteristic of the imprinted film to bifenthrin was evaluated by equilibrium binding experiments and imprinting-induced promotion of binding. The MISF was modified into the wells of 96 micro-well plate combined with chemiluminescence (CL) technology to establish the molecular imprinting-chemiluminescence (MI-CL) sensor. The high throughput and high selective detection sensor of bifenthrin was applied in vegetable and food samples with satisfactory results.

Synthesis and Application of Molecularly Imprinted Sol-Gel Film for Simultaneous Determination of Multi-Component Pesticide Residue

2011 ◽  
Vol 306-307 ◽  
pp. 1667-1672 ◽  
Author(s):  
Shen Guang Ge ◽  
Pei Ni Zhao ◽  
Jing Hua Yu ◽  
Jia Dong Huang
Keyword(s):  
Simultaneous Determination ◽  
Pesticide Residue ◽  
Sol Gel ◽  
Three Dimensional ◽  
Molecularly Imprinted ◽  
Dimensional Network ◽  
Lambda Cyhalothrin ◽  
Gel Film ◽  
Recognition Efficiency

In this paper, three kinds of molecularly imprinted sol-gel film (MISF) which have good thermal and chemical stability and three-dimensional network porous structure have been developed. The material was synthesized by sol-gel technology using lambda-cyhalothrin, trichlorphon and beta-cyfluthrin as model analytes. The special structural behavior makes the material have good capability to seizure and capture template molecules which enhanced the MISF’s recognition efficiency and the property of separation and enrichment. The material was environmental friendly and easy to operate. The binding characteristic of the imprinted film to the three pesticides was evaluated by equilibrium binding experiments. The SEM of the three MISF has been performed to characterize the morphology of MISF. The MISFs were combined with chemiluminescence (CL) technology by modifying the sol-gel into 96 micro-well plate to establish one molecular imprinting- chemiluminescence (MI-CL) sensor which realized high selectivity, sensitivity and high throughput simultaneous assay of three pesticides. The proposed method was successfully applied to the simultaneous determination of multi-component pesticide residue in foodstuff.

scholarly journals Construction of the Cellulose Nanofibers (CNFs) Aerogel Loading TiO2 NPs and Its Application in Disposal of Organic Pollutants

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1841
Author(s):  
Kang Li ◽  
Xuejie Zhang ◽  
Yan Qin ◽  
Ying Li
Keyword(s):  
High Efficiency ◽  
Sol Gel ◽  
Cellulose Nanofibers ◽  
Three Dimensional ◽  
Good Mechanical Property ◽  
Polar Groups ◽  
Dimensional Network ◽  
Natural Polysaccharide ◽  
Valuable Method ◽  
Adsorption Capability

Aerogels have been widely used in the adsorption of pollutants because of their large specific surface area. As an environmentally friendly natural polysaccharide, cellulose is a good candidate for the preparation of aerogels due to its wide sources and abundant polar groups. In this paper, an approach to construct cellulose nanofibers aerogels with both the good mechanical property and the high pollutants adsorption capability through chemical crosslinking was explored. On this basis, TiO2 nanoparticles were loaded on the aerogel through the sol-gel method followed by the hydrothermal method, thereby the enriched pollutants in the aerogel could be degraded synchronously. The chemical cross-linker not only helps build the three-dimensional network structure of aerogels, but also provides loading sites for TiO2. The degradation efficiency of pollutants by the TiO2@CNF Aerogel can reach more than 90% after 4 h, and the efficiency is still more than 70% after five cycles. The prepared TiO2@CNF Aerogels have high potential in the field of environmental management, because of the high efficiency of treating organic pollutes and the sustainability of the materials. The work also provides a choice for the functional utilization of cellulose, offering a valuable method to utilize the large amount of cellulose in nature.

Effect of the drying on morphology and texture of aerogels and zirconia cryogels

MRS Advances ◽  
2019 ◽  
Vol 4 (64) ◽  
pp. 3513-3521
Author(s):  
Tzipatly A. Esquivel-Castro ◽  
Antonia Martínez-Luévanos ◽  
Luis Alfonso García-Cerda ◽  
Juan C. Contreras-Esquivel ◽  
Pascual Bartolo Pérez ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Cetyltrimethylammonium Bromide ◽  
Sol Gel ◽  
Three Dimensional ◽  
Supercritical Drying ◽  
Sem Images ◽  
Texture Properties ◽  
Dimensional Network ◽  
Zirconia Aerogel

ABSTRACTDue to their excellent properties, aerogel has attracted the attention of the scientific community to use it in the biomedical area as a drug delivery system. This work reports on the synthesis and characterization of ZrO2 aerogels and cryogels obtained by the sol-gel method. The influence of different cetyltrimethylammonium bromide (CTAB) and the type of drying on structural, morphological and texture properties of ZrO2 aerogels and cryogels was investigated. SEM images reveal that a porous interconnected three-dimensional network was formed into aerogels due to supercritical drying. Zirconia aerogel sample has a specific surface area (SBET) larger than zirconia cryogels. Therefore, our results indicate that zirconia aerogel is an adequate material for applications in drug delivery systems.

NMR and FTIR Characterization of Sol-Gel Derived Ternary Oxide Glasses in the System BaO–TIO2–SiO2

1995 ◽  
Vol 50 (9) ◽  
pp. 837-844 ◽  
Author(s):  
M. Feike ◽  
K. Meise-Gresch ◽  
Qi Chen ◽  
G.H. Frischat
Keyword(s):  
Chemical Shifts ◽  
Glassy State ◽  
Sol Gel ◽  
Three Dimensional ◽  
Ternary Oxide ◽  
Oxide Glasses ◽  
Ftir Characterization ◽  
Dimensional Network ◽  
Silicate Structure ◽  
History Of

Abstract The annealing history of glasses in the system (20-40) BaO-40TiO2(40-20)SiO2 has been mon­itored by 29Si MAS NMR and FTIR spectroscopy from the dried gel to the final glassy state. Assignment of chemical shifts to specific building units has been facilitated by comparative studies of the limiting less complex binary silicate systems. From the NMR spectra at various compositions appreciable condensation to a three-dimensional network is inferred already at low drying temper­atures. Processes like the pyrolysis of acetate rests of the starting materials and modification of the silicate structure due to Ba2+ cations have been mirrored in the spectra of both methods for samples annealed at intermediate temperatures. The microstructure of the final gel glass of the ternary system has been determined spectroscopically to consist of silicate and titanate species typical of crystalline fresnoite, whereas remaining amounts of TiO2 and SiO2 develop a separate network each. Only small amounts of Si-O-Ti linkages have been recognized in the vibrational absorptions; they vanish at higher annealing stages.

Freezing Dynamical Sol-gel processes with the controlled environment vitrification system (CEVS)

1987 ◽  
Vol 45 ◽  
pp. 356-357
Author(s):  
J. R. Bellare ◽  
J. K. Bailey ◽  
M. L. Mecartney
Keyword(s):  
Sol Gel ◽  
Particle Surface ◽  
Three Dimensional ◽  
Colloidal Dispersions ◽  
Submicron Particles ◽  
Surface Charges ◽  
Stable Suspension ◽  
Dimensional Network ◽  
Processing Techniques

A sol is a stable suspension of submicron particles in a liquid while a gel is a three dimensional network of these particles which is bicontinuous with the liquid phase. Sol particles are stabilized by surface charges or by steric hindrance of molecules on the particle surface. Sols can be gelled by the agglomeration of the particles; for example, by reducing the inter-particle repulsion with the addition of a salt. The sol-gel transformation is an important industrial, biological and household process. Novel ceramic processing techniques, blood-clotting, and white-sauce manufacturing are some diverse examples. Therefore, there has been extensive interest in relating the gel structure to changes in the physical properties that occur during gelation.Direct observation of thin vitrified films is the preferred technique for microstructural determination of colloidal dispersions in the size range of 1-1000nm.

Application of a nanostructured platform and imprinted sol-gel film for determination of chlorogenic acid in food samples

Talanta ◽  
2016 ◽  
Vol 156-157 ◽  
pp. 119-125 ◽  
Author(s):  
Carla M. Ribeiro ◽  
Eliane M. Miguel ◽  
Jonadab dos S. Silva ◽  
Cristian B. da Silva ◽  
Marília O.F. Goulart ◽  
...  
Keyword(s):  
Chlorogenic Acid ◽  
Sol Gel ◽  
Food Samples ◽  
Gel Film
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