A novel non-enzymatic glucose sensor based on gold-nickel bimetallic nanoparticles doped aluminosilicate framework prepared from agro-waste material

Highlights: • Silica extracted from stem sweep ash was used in the synthesis of nano X zeolite. • AuNi nanoparticles were embedded into the X zeolite to induce catalytic activity. • Multi-walled carbon nanotube improved the electrical conductivity of hybrid. • AuNi/NX/MWCNT/GCE showed low limit of detection and wide linear range for glucose. • The sensor was successfully applied for determination of glucose in human serum. Functionalized porous nanomaterials have been introduced as novel substrates with high surface area and large porosity for the construction of efficient catalysts in sensors. In this regard, nano X zeolite (NX), as a kind of aluminosilicate framework material, can be used as a hosting material for nanocatalysts in the design and fabrication of electrochemical sensors. Herein, a sensor based on multi-walled carbon nanotube (MWCNT) and NX material as a substrate for AuNi bimetallic nanoparticles obtained from agro-waste stem sweep was fabricated to detect nanomolar concenteration of glucose. The catalyst has provided a desired analytical performance for the glucose sensor with low limit of detection (0.063 µM) in the linear range of 1–1900 µM and sensitivity of 662.93 µA mM⁻¹. The results depend on the presence of NX in the sensor and confirm the preference of a porous host existence for the AuNi catalyst in the sensing process. In AuNi/NX/MWCNT electrocatalyst, the disaggregation of Au nanoparticles by decorating on sacrificial Ni and the creation of abundant active sites through NX make the acceptable results for non-enzymatic detection of glucose in the human serum samples.