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This study investigates the synthesis of TiO2 using the rind of Aloe vera (L.) Burm extract as a green-capping agent. It was discovered that adding the studied extract up to 10 % (TOAv10) increased the surface area and pore volume while maintaining the spherical shape of the nanoparticles. Overall, the TOAv4 sample has the highest photocatalytic activity compared to other samples and a good photocatalytic activity compared to TiO2 prepared without extract. The current findings provide an environmentally friendly and low-cost protocol for the synthesis of TiO2 nanoparticles in the application of wastewater treatment.

In this study, the generation of 1D TiO2 nanowires was controlled by introducing NH4OH in a one-step hydrothermal method. The increasing amount of NH4OH reduced the width of the resulting TiO2 nanowires, revealing that NH4OH altered the morphologies of the synthesized TiO2 nanowires. NTW20 showed the best photoreduction performance since NTW20 had smaller widths, large surface area and more efficient redox reaction on the surface. In comparison, the absence of photocatalyst yielded a low photoreduction activity of 5.7 %, indicating that the synthesized TiO2 nanowires showed an excellent performance in photocatalysis reactions.