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Elham F. Mohamed,Gamal Awad 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-
Synthesis of new hollow nano-composite photocatalysts based yeast biomass has been considered as afuture innovation technology to control air pollution. This work demonstrates that a green,environmentally friendly, sustainable, and facile hydrothermal carbonization route of low-cost andrenewable yeast biomass used to fabricate natural doping N-colloidal carbon spheres (NCSs) as a hardtemplate for hollow N-TiO2/MnO2. The presence of natural doping nitrogen serves as a stabilizer andreductant. Hence, the yeast provided a solid frame with deposits nitrogen to form the hybrid N/yeastprecursor. The resulting NCSs were obtained by hydrothermal method at 180 C for 6 h. Thecharacterization was performed using SEM, TEM, XRD, FTIR and N2 adsorption/desorption analysis. Itwas found that thefindings fully retained the morphology of the yeast cells and the size of the hollowspheres was about 1.5–2 mm. The results of catalytic test showed that the new hollow nanosphere NTiO2/MnO2 possessed a higher photodegradation activity for gaseous formaldehyde under visibleirradiation than the commercial TiO2, due to their higher surface area (160 m2 g 1), hollow structure andsuperior reducibility. Its catalytic efficiency was attained to be more than 90%, which is about 10 timeshigher than that of the conventional catalyst TiO2–P25.