Three-dimensional bioactive, antioxidant, and porous nanocomposite scaffolds are inevitable to avoid dependency and disability in the life cycle. Herein, we develop a facile fabrication protocol of nano porous zinc doped hydroxyapatite (Zn-HAp) scaffold enhanced by polysaccharide polymeric structure for bone tissue engineering applications. The bioactive nano scaffold exhibit opens porous assembly that sustains its flexible and robust nature and promotes efficient linking capability. Moreover, nano scaffold geometry and its porosity were controlled efficiently in various concentrations of zinc doped hydroxyapatite (Zn-HAp) nanoparticles. Indeed, the composite scaffolds are retained in a dry shape with a suitable load-bearing strength adjacent to the cancellous bone. The presence of zinc doped hydroxyapatite in the polymeric matrix of nano scaffold regulates its antibacterial response against different bacterial strains owing to its oxidative stress nature. The antioxidant and biocompatibility of nanoscaffolds were investigated by DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging behavior, the scavenging activity of ABTS (2,2-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid) radical, and iron-chelating potential. The observed results reveal that polysaccharide-dependent porous geometry possesses adequate biocompatibility, radical scavenging behavior, and excellent antibacterial properties that validate it as a suitable candidate material for bone tissue implantation. The unprecedented radical scavenging and antioxidant bioactive nanocomposite scaffold are all set to reshape the future bone tissue implantation.
A highly cost-effective recycled biomaterial extracted from lime peel has been made biocompatible and has been coated on a commercial fluorine-doped tin oxide (FTO) substrate of glass using the spin coating method. Structural, morphologic, electronic, and antibacterial measurements were thoroughly characterized as a green biomaterial thin film using X-rays (XRD), PL, FTIR, Raman, SEM, HRTEM, AFM, I–V, and antibacterial diffusion techniques. The comprehensive analysis of structures of recyclable waste in the form of lime peel extract (LPE) as thin films showed the crystalline cellulose structure that corresponds to the lattice fringe (0.342 nm) exposed by HRTEM. The K
+1
interstitial active sites or vacancies in LPE/FTO thin films are confirmed by the PL spectra that show important evidence about conduction mechanisms, and hence facilitates Ag
+1
ion migration from the top to the bottom electrode. The AFM investigations revealed the minor surface roughness (169.61 nm) of the LPE/FTO film, which controls the current leakage that is associated with surface defects. The designed memory cell (Ag/LPE/FTO) exhibits stable, reproducible electrical switching under low operational voltage and is equipped with excellent retention over 5 × 10
3
s. Furthermore, owing to presence of flavonoids and their superior antioxidant nature, lime peel extract powder shows tremendous antimicrobial activity against gram-positive and Gram-negative bacterial strains.
Biomass-based
photothermal conversion is of great importance for
solar energy utilization toward carbon neutrality. Herein, a hybrid
solar evaporator is innovatively designed via UV-induced printing
of pyrolyzed Kudzu biochar on hydrophilic cotton fabric (KB@CF) to
integrate all parameters in a single evaporator, such as solar evaporation,
salt collection, waste heat recovery for thermoelectricity, sieving
oil emulsions, and water disinfection from microorganisms. The UV-induced
printed fabric demonstrates stronger material adhesion as compared
to the conventional dip-dry technique. The hybrid solar evaporator
gives an enhanced evaporation rate (2.32 kg/m2 h), and
the complementary waste heat recovery system generates maximum open-circuit
voltage (V
out ∼ 143.9 mV) and solar
to vapor conversion efficiency (92%), excluding heat losses under
one sun illumination. More importantly, 99.98% of photothermal-induced
bacterial killing efficiency was achieved within 20 min under 1 kW
m–2 using the hyperthermia effect of Kudzu biochar.
Furthermore, numerical heat-transfer simulations were performed successfully
to analyze the enhanced interfacial heat accumulation (75.3 °C)
and heat flux distribution of the thermoelectric generators under
one sun. We firmly believe that the safe use of bio-polluted invasive
species in hybrid solar-driven evaporation systems eases the environmental
pressure toward carbon neutrality.
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