Recent advances in sustainable strategies for development of innovative nanobiocatalysts using immobilized β-glucosidase for industrial applications

β-glucosidases are a well-characterized, diverse group of hydrolytic enzymes that act on various substrates. They are extensively used in different sectors, including: bioethanol, food, flavor, nutraceutical, and pharmaceutical industries. Immobilization improves the operational stability, reusability and catalytic efficiency of β-glucosidase compared to the free enzyme. The nanoscale dimensions, high surface area of the nanomaterial, and strong enzyme-nanosupport interactions prevent denaturation and leaching of β-glucosidase. This boosts enzyme stability, reduces the need for replenishment, and allows for easy recovery and reuse, minimizing enzyme waste and energy consumption in industrial biocatalysis. Nanosupport materials, including: inorganic materials, carbon, biopolymer-based, and magnetic nanoparticles, have gained popularity as immobilization matrices for generating either β-glucosidase immobilization or co-immobilization systems for various applications. The present review focuses on the current trends in immobilization strategies of β-glucosidase for improving operational stability and recyclability of the enzyme. Additionally, this review provides deeper insights into various surface modifications of magnetic and non-magnetic nanosupport matrices employed for immobilization and their impact on the catalytic efficiency of β-glucosidase. Moreover, the review thoroughly investigates the challenges encountered in immobilizing β-glucosidases on various nanosupport matrices. It concludes with insightful remarks that encourage future researchers to conduct studies dedicated to the development of a highly efficient, industrially adapted nanobiocatalytic system to achieve sustainable biotransformation aligning with United Nations Sustainable Development Goals (SDG): SDG 2 (Sustainable Food System), SDG 7 (Affordable and Clean Energy), SDG 9 (Sustainable Industry), SDG 12 (Responsible Consumption), and SDG 13 (Climate Action: Reducing Carbon Emissions).