Author

Maryam Hajjami

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Open access Oct 2026

SulfoChar as a Novel Nano-Biochar Additive for B20 Biodiesel Blends: Enhancing Combustion and Reducing Exhaust Emissions

While biodiesel blends offer renewable alternatives to conventional diesel, mitigating their nitrogen oxide (NOx) penalties and optimizing combustion typically requires synthetic or metallic additives. This study introduces SulfoChar, a sulfonated walnut-shell nanobiochar functionalized with sulfonic acid (–SO3H) group...

Mahtab Yarveysi, B. Shadidi, Maryam Hajjami et al. · Fuels · 0 citations

Open access Aug 2026

Amine-functionalized biochar as a green and recyclable nanocatalyst for the efficient synthesis of 1,8-naphthyridine and 2-amino-4H-chromene derivatives

Biochar is a renewable carbon-based material derived from biomass resources, which has attracted widespread attention due to its low production cost, environmental sustainability and high surface modification and functionalization capabilities. However, its potential application as an effective catalyst, especially for...

Reza Hazbavi, Maryam Hajjami, M. Zolfigol et al. · RSC Advances · 1 citation

Open access Sep 2026

A sulfonic acid-functionalized amine-linked covalent organic framework as a robust catalyst for the preparation of pyrrole-2-ones

In recent years, covalent organic frameworks (COFs) have emerged as powerful heterogeneous catalysts. Notwithstanding, attainment of both crystallinity and stability of COF-based catalysts under harsh conditions is still challenging. Herein, an imine-linked COF has been transformed into an amine-linked COF via the redu...

Mohammadamin Oghan, M. Zolfigol, Maryam Hajjami et al. · Nanoscale Advances · 0 citations