Abstract
Carbon dioxide, one of the primary greenhouse gasses leading to global warming, ocean acidification, and climate change is an obnoxious concern. Human dependency on fossil fuels not only spikes the CO2 level but also depletes the limited energy resources. The horrendous impact of carbon footprint has made the reduction of CO2 into solar fuel an indispensable task. The photocatalyst-enzyme integrated artificial system has emerged as a benchmark for CO2 fixation solving both the energy crisis and carbon emission simultaneously. Herein a TBE-Y photocatalyst designed by coupling triptycene (T) with eosin-Y (EY) through Friedel Craft reaction shows excellent solar light harvesting property, high molar extinction coefficient, and appropriate band-gap. The as-synthesized 3D polymeric TBE-Y photocatalyst exhibits high NADH regeneration (78.77%) which when consecutively coupled with enzyme (formate dehydrogenase) via electron mediator produces HCOOH (189.34 μmol) from CO2 in high yield in 2 h.
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