AI Article Synopsis
- A new photochemical sensor was created for detecting mercury ions (Hg2+) using organically modified silicates (ormosils) and a special fluorescent indicator.
- The sensor involved a process of co-condensation of two silanes, TMOS and DMOS, with the indicator embedded as ion pairs for effective detection.
- It demonstrated a linear response for Hg2+ concentrations between 1.0 x 10(-5) and 1.0 x 10(-4) mol x L(-1) in a specific buffer solution, offering fast responses, good repetition, and selectivity against other metal ions without leakage of the fluorescent indicator.
Article Abstract
A photochemical sensor for the determination of Hg2+ consisting of organically modified silicates (ormosils) was developed. Hg(2+)-sensitive fluorescent sol-gel films were prepared by co-condensation of tetramethoxysilane (TMOS) and dimethyldimethoxysilane (DMOS), and the fluorescent indicator 5,10,15, 20-tetra (p-sulfonatophenyl) porphyrin sodium was embedded in sol-gel in the form of ion pairs with cetyltrimethyl ammonium bromide. The optimization condition of preparation and response performance of sol-gel membrane were investigated. The experimental results showed a linear range of Hg2+ concentrations from 1.0 x 10(-5) to 1.0 x 10(-4) mol x L(-1) in a Tris-HCl buffer at pH 8.0 with fast response and good repetition. The indicators in the sol-gel membrane did not leak out and the sensor showed good selectivity over other metal ions.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Development of Lacosamide-loaded In-Situ Gels through Experimental Design for Evaluation of Ocular Irritation In Vitro and In Vivo.
J Pharm Sci
December 2024
Undergraduate student, Faculty of Pharmacy, Suleyman Demirel University, Isparta, Türkiye.
Lacosamide (LCM) selectively increases the slow inactivation of voltage-gated sodium channels (VGSCs) and is a N-methyl D-aspartate acid (NMDA) receptor glycine site antagonist. Therefore, it can be used in dryness-related hyperexcitability of corneal cold receptor nerve terminals. Ocular in-situ gels remain in liquid form until they reach the target site, where they undergo a sol-gel transformation in response to specific stimuli.
View Article and Find Full Text PDFEnhanced photocatalytic performance and a mechanistic study of novel black phosphorus/graphene/TiO composite membrane for o-chlorophenol removal.
Environ Res
December 2024
Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, China; Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore. Electronic address:
The heterogeneous catalysis of the composite membrane not only exerts the synergistic effect of different materials but also enable the recyclable use of catalysts, making it an ideal and sustainable strategy for removing pollutants in water. In this study, a novel black phosphorus/graphene/titanium dioxide (BP/GR/TiO) membrane was successfully prepared through the sol-gel method. The composite membrane not only overcame the instability of black phosphorus and the rapid recombination of e/h pairs in titanium dioxide but also synergized with GR to produce a new reactive oxygen species (ROS), singlet oxygen (O), with a longer lifetime and migration distance.
View Article and Find Full Text PDFMacromolecular Architecture in the Synthesis of Micro- and Mesoporous Polymers.
Polymers (Basel)
November 2024
Technology of Synthetic Rubber Department, Kazan National Research Technological University, 68 Karl Marx Str., 420015 Kazan, Russia.
Polymers with micro- and mesoporous structure are promising as materials for gas storage and separation, encapsulating agents for controlled drug release, carriers for catalysts and sensors, precursors of nanostructured carbon materials, carriers for biomolecular immobilization and cellular scaffolds, as materials with a low dielectric constant, filtering/separating membranes, proton exchange membranes, templates for replicating structures, and as electrode materials for energy storage. Sol-gel technologies, track etching, and template synthesis are used for their production, including in micelles of surfactants and microemulsions and sublimation drying. The listed methods make it possible to obtain pores with variable shapes and sizes of 5-50 nm and achieve a narrow pore size distribution.
View Article and Find Full Text PDFA new approach to overcome cytotoxic effects of Cu by delivering dual therapeutic ions (Sr, Cu).
J Trace Elem Med Biol
November 2024
Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen 91058, Germany. Electronic address:
Introduction: The incorporation of trace elements such as strontium (Sr) and copper (Cu) in the composition of mesoporous bioactive glass (MBG) is widely known to enhance its biological functionality for bone tissue regeneration METHODS: Two MBG powders with the composition 80SiO-11CaO-5PO-xCuO/SrO, one doped with 4 mol.% of CuO, the second with 4 mol.% of SrO were blended in the weight ratios of Cu-MBG: Sr-MBG; 100:0, 70: 30, 50: 50, 30: 70 and 0:100 aiming at minimizing Cu to minimize the cytotoxicity of Cu while preserving its antimicrobial activity.
View Article and Find Full Text PDFDirectly Gel-Thermal Processing of Linker-Mixed Crystal-Glass Composite Membranes for Sorption-Preferential Gas Separation.
Adv Sci (Weinh)
December 2024
College of Environment and Climate, Jinan University, No. 855, East Xingye Avenue, Panyu District, Guangzhou, 511443, China.
Membrane processes are promising for energy-saving industrial applications. However, efficient separation for some valuable gas mixtures with similar characteristics, such as CH/N and O/N, remains extremely challenging. Metal-organic framework (MOF) membranes have been attracting intensive attention for gas sieving, but it is difficult to manufacture MOF membranes in scalability and precisely tune their transport property.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!