Global warming and environmental pollution due to carbon dioxide (CO₂) emissions are the most important problems and major challenges to the present researchers and the scientific community throughout the world.^1–3  The most important challenges due to global warming and environmental pollution are the decline in organic matter, salinization, soil biodiversity loss, landslides, desertification, flooding, and acid rain. And for human beings, the many health problems caused due to environmental pollution such as breathing problems, lung cancer, heart problems, heavy metal concentrations in the blood due to water pollution.^4,5  Similarly, the ecosystems is also being seriously damaged, many aquatic systems are being affected, fish and animals die every year due to environmental water pollution. Seriously looking into efficient techniques and practices to tackle CO₂ emissions could successfully overcome the emergent problems.⁶  Developing efficient nanomaterials and their composites with high surface area as adsorbents has become the hot topic of research for successfully capturing CO₂ emission.⁷  The nano-adsorbents can selectively and efficiently bind the CO₂ gas molecules over a wider range of temperatures and pressures.^8–11