A Glauert type laminar wall jet issuing into a stationary liquid medium lying above a wall has technical uses in wall cooling and flow control. It plays a vital role in industrial applications like cooling/heating by impingement of jet, turbine blades, film cooling, mass and heat transfer phenomena. In this regard, a steady incompressible two-dimensional laminar Glauert kind wall jet is scrutinized in this study by considering nanoparticles suspension in the base liquid sodium alginate $(NaA\lg )$ with suction and wall slip boundary conditions. Further, a comparative study is done by considering aluminum alloy $(AA7075)$ and single-walled carbon nanotube $(SWCNT)$ as nanoparticles. The reduced ordinary differential equations (ODEs) are numerically solved by applying Runge–Kutta–Fehlberg fourth fifth-order (RKF-45) technique along with the shooting method. Results reveal that $NaA\lg -SWCNT$ Casson nanofluid shows enhanced heat transfer than $NaA\lg -AA7075$ Casson nanoliquid for increased values of radiation parameter. The rising values of the Casson parameter deteriorate the heat transfer rate of both nanoliquids but an inverse trend is seen for improved values of radiation parameter.

Photocatalytic degradation failure is a significant environmental pollution problem. Therefore, this article emphasizes the in-depth photocatalytic degradation of methylene blue (MB) by UV light irradiation using ZnO photocatalysts nanoparticles every 30 min of a time interval and examines the improvement in the irradiation period. The sol-gel co-precipitation route produces the photocatalyst ZnO nanoparticle to eliminate MB dye. The characterization studies of ZnO photocatalysts are explored by x-ray diffraction, scanning electron, and UV visible spectroscopic techniques. The XRD study elucidates a lesser crystallite size of the order 24.71 nm with a small microstrain, and dislocation density boosts the ZnO nanoparticle to act as dilapidation of 10 ppm of MB colourant. The SEM photographs of Zinc oxide nanoparticles reveal the nanospeck dimension of 32 nm. The EDX and Elemental mapping explore the composition of the ZnO photocatalyst. The syntheses of ZnO nanoparticles have low overpotential for HER (Hydrogen Evolution Reaction). A very low slope of 41.2 mV/dec represents the Volmer-Tafel mechanistic pathway for the HER process. Chronopotentiometry was conducted, and the amount of hydrogen collected during these experiments was 21 ml for the ZnO nanoparticles.