Cellulose derivatives crosslinked by citric acid on electrode surface as a heavy metal absorption/sensing matrix

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F21%3A63539101" target="_blank" >RIV/70883521:28110/21:63539101 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0927775721011110?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0927775721011110?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.colsurfa.2021.127242" target="_blank" >10.1016/j.colsurfa.2021.127242</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cellulose derivatives crosslinked by citric acid on electrode surface as a heavy metal absorption/sensing matrix

Popis výsledku v původním jazyce

Hypothesis: Modification of cellulose derivatives with citric acid leads to gain in sorption capacity towards metal ions, which has been many times applied for heavy metal sequestration. This work, for the first time, investigated the in-situ coating of a carbon electrode with citric acid-crosslinked cellulose derivatives. The occurrence of crosslinking bonds was revealed using infrared spectroscopy and thermogravimetric analysis, while other features were investigated using electrochemical methods. Experiments: Electrodes were modified by casting of aqueous solutions of cellulose derivatives (hydroxyethyl cellulose, HEC and thermally pre-treated carboxymethyl cellulose, T-CMC) mixed with citric acid (CA) on the electrode surface, followed by thermal treatment (110 °C, 1 h) to reach the requested HEC-CA and T-CMC-CA hydrogels coated on glassy carbon electrodes. Findings: After the absorption of metal cations from solution, the electrodes coated by both HEC-CA and T-CMC-CA exhibited stripping voltammetry peaks for Pb, Cd and Cu, contrary to electrodes prepared without crosslinking. It was also observed that HEC-CA surface change its electrochemical impedance reversibly after deposition and acid-induced removal of Pb2+. Assessment of Pb2+ sensing properties revealed the detection limit of 0.39 mg L−1 and sensitivity of 9.91 μA L mg−1. Therefore, the citric acid-crosslinked cellulose derivatives can be employed for the preparation of cheap and sustainable heavy metal sensors and similar surfaces.

Název v anglickém jazyce

Cellulose derivatives crosslinked by citric acid on electrode surface as a heavy metal absorption/sensing matrix

Popis výsledku anglicky

Hypothesis: Modification of cellulose derivatives with citric acid leads to gain in sorption capacity towards metal ions, which has been many times applied for heavy metal sequestration. This work, for the first time, investigated the in-situ coating of a carbon electrode with citric acid-crosslinked cellulose derivatives. The occurrence of crosslinking bonds was revealed using infrared spectroscopy and thermogravimetric analysis, while other features were investigated using electrochemical methods. Experiments: Electrodes were modified by casting of aqueous solutions of cellulose derivatives (hydroxyethyl cellulose, HEC and thermally pre-treated carboxymethyl cellulose, T-CMC) mixed with citric acid (CA) on the electrode surface, followed by thermal treatment (110 °C, 1 h) to reach the requested HEC-CA and T-CMC-CA hydrogels coated on glassy carbon electrodes. Findings: After the absorption of metal cations from solution, the electrodes coated by both HEC-CA and T-CMC-CA exhibited stripping voltammetry peaks for Pb, Cd and Cu, contrary to electrodes prepared without crosslinking. It was also observed that HEC-CA surface change its electrochemical impedance reversibly after deposition and acid-induced removal of Pb2+. Assessment of Pb2+ sensing properties revealed the detection limit of 0.39 mg L−1 and sensitivity of 9.91 μA L mg−1. Therefore, the citric acid-crosslinked cellulose derivatives can be employed for the preparation of cheap and sustainable heavy metal sensors and similar surfaces.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GJ20-27735Y" target="_blank" >GJ20-27735Y: Nanotechnologie pro průtočné elektrochemické senzory využitelné v environmentálním inženýrství</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Colloids and Surfaces A: Physicochemical and Engineering Aspects

ISSN

0927-7757

e-ISSN

—

Svazek periodika

628

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000702815200006

EID výsledku v databázi Scopus

2-s2.0-85111943087