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Smart Polymeric Biomaterials in Tissue Engineering
Published in Rajesh K. Kesharwani, Raj K. Keservani, Anil K. Sharma, Tissue Engineering, 2022
Akhilesh Kumar Maurya, Nidhi Mishra
Synthetic (chemically synthesized) or artificial polymers are man-made polymers. Various types of man-made biopolymers are present with different functional group’s side chains and main chains. Synthetic polybiomaterials have potential to improve the quality of life; therefore, it has great importance in the medical field (Wnek, 2004). Biochemists are now capable of synthesizing number of synthetic biopolymers. Synthetic polymers offer several advantages over their natural counterparts, including improved chemical resistance, mechanical durability, and tunability of their properties. Biodegradable materials which have hydrophilic and nonhydrolytic properties such as polyethylene glycol (PEG), PVA, and polyacrylamide (PAM), amphiphilic block polymers such as PEG-b-PPG-b-PEG, hydrophobic polymers such as poly(n-butyl acrylate) as well as biomaterials which are hydrophobically and hydrolytically susceptible such as poly(α-esters), and thermally sensitive polymers such as PNIPAM have also been widely used as biomaterials (Fields et al., 2012).
Sol-gel template synthesis of visible photoactive Cu-S co-doped mesoporous TiO2 catalyst
Published in Journal of Applied Water Engineering and Research, 2023
Abubakar Hamisu, Sani Saminu Bala, Abdu Muhammad Bello, Abdullahi Musa Abubakar, Abel Adekanmi Adeyi
A new visible light active mesoporous copper and sulfur co-doped TiO2 catalyst (Cu, S/PEG-PVA/TiO2) was successfully synthesized by employing polyethylene glycol (PEG) and polyvinyl alcohol (PVA) as bi-template. Significant band gap energy red shift was observed when Bare-TiO2 was codoped with S and Cu (from 3.23 eV for Bare-TiO2 to 2.44 eV for Cu, S/TiO2). The addition of the templates (PEG and PVA) caused further decreases in the band gap to 2.37 eV. The catalytic performance of the synthesized catalysts was studied by monitoring the photodegradation of 4NP in aqueous solutions. The highest 4NP degradation of 96.3% was observed in 240 min for Cu, S/PEG-PVA/TiO2 catalyst.