Inorganic/Analytical Seminar – MD Zaman Wahad
About the event
Speaker: MD Zaman Wahad
Group: Dr. Kevin Kittilstved
Title: Advances in bulk and nanostructured SrTiO3 and related Ruddlesden–Popper phases for photocatalysis and environmental remediation
Abstract: Strontium titanate (SrTiO3) and its layered Ruddlesden–Popper (RP) derivatives, Srn+1TinO3n+1 (n = 1, 2), have emerged as versatile perovskite-type oxides with remarkable stability and tunable electronic properties for photocatalytic and environmental applications. This literature review highlights recent advances in doping strategies, nanostructuring, and heterojunction design aimed at improving light absorption, charge separation, and surface reactivity of SrTiO3 and related RP-based materials. Particular emphasis is placed on the influence of lanthanide and transition-metal dopants, which modify crystal morphology, band structure, and carrier dynamics, while also introducing recombination centers that limit overall efficiency. The role of co-catalysts and interfacial engineering in promoting redox reactions and suppressing electron–hole recombination is critically evaluated. Moreover, the construction of Z-scheme heterostructures and integration with carbonaceous materials such as graphene are discussed as promising routes to enhance visible-light utilization and prevent photocorrosion. Finally, future research directions are proposed to optimize dopant selection, elucidate interfacial mechanisms, and achieve scalable, durable, and high-quantum-yield photocatalysts for solar-driven water splitting and pollutant degradation.
References:
1. Sasaki, Y., et al., Solar water splitting using powdered photocatalysts driven by Z-schematic interparticle electron transfer without an electron mediator. The Journal of Physical Chemistry C, 2009. 113(40): p. 17536-17542.
2. Doughty, R.M., et al., Fermi level pinning controls band bending and photochemical charge separation in particles of n-SrTiO3, n-SrTiO3: Al, and n-GaAs: Te. The Journal of Physical Chemistry C, 2020. 124(34): p. 18426-18435.
3. Wu, G., et al., Hydrothermal synthesis and visible-light-driven photocatalytic degradation for tetracycline of Mn-doped SrTiO3 nanocubes. Applied Surface Science, 2015. 333: p. 39-47.
4. Fujinami, K., et al., Sub-10 nm strontium titanate nanocubes highly dispersed in non-polar organic solvents. Nanoscale, 2010. 2(10): p. 2080-2083.
5. Wang, J., et al., Nb/N co-doped layered perovskite Sr2TiO4: preparation and enhanced photocatalytic degradation tetracycline under visible light. International Journal of Molecular Sciences, 2022. 23(18): p. 10927.