Fabrication of silver nanoparticle loaded into nanocellulose derived from hemp (HNC) and polyvinyl alcohol-based composite as electrode for electrochemical sensors for lactate determination

การเตรียมอนุภาคเงินบนนาโนเซลลูโลสที่ได้มาจากกัญชง (HNC) ร่วมกับพอลิไวนิลแอลกอฮอล์เป็นคอมโพสิตอิเล็กโทรดสำหรับเซนเซอร์ไฟฟ้าเคมีเพื่อตรวจวัดแลคเตท

Name: Rujira Phumma

keyword: Hemp nanocellulose (HNC)

; Silver nanoparticles (AgNPs)

; Polyvinyl alcohol (PVA)

; Screen-printed graphene electrode

; Electrochemical sensor

; Lactate detection

Abstract: The hemp fiber successfully enhanced the electrochemical sensors performance of screen-printed graphene electrodes (SPGEs) for lactate detection. Initially, the hemp nanocellulose (HNC) was fabricated using alkali and acid treatment, followed by an in-situ self-reductions process of the silver nanoparticles (AgNPs) to increases the electrical conductivity of the HNC prior to forming the composites with polyvinyl alcohol (PVA). Then, it was drop-casted into the working electrodes (WEs) to enhanced the active surface area of SPGEs. The morphologies and the chemical alterations of HNC-AgNPs/PVA composites were investigated by FESEM-EDX, mapping analysis, FT-IR, XRD, and the thermal withstanding was stable up to 450°C, confirmed by TGA. For electrochemical behavior, the 10.0wt%. HNC-AgNPs/PVA provided the high currents responses, verified by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) with the standard redox couples {[Fe (CN)6]3-/4-}, For lactate detection, the lactate analyte was incubated with lactate oxidase before measuring with 10.0wt%. HNCs-AgNPs/PVA modified into SPGEs via amperometry. This sensor offered a 0 - 25 mM linearity with R2 at 0.9961. Ultimately, this sensor was successfully a feasible applied for the lactate detection and has great potential for practical use in the future.

Thammasat University. Thammasat University Library

Address: BANGKOK

Email: preserv@tu.ac.th

Name: Sarute Ummartyotin

Role: advisor

Name: Nadnudda Rodthongkum

Role: co-advisor

Created: 2024

Modified: 2024-11-23

Issued: 2024-11-23

วิทยานิพนธ์/Thesis

application/pdf

DOI: 10.14457/TU.the.2023.477

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Materials Innovation and Technology

Grantor: Thammasat University

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