Increasing global warming due to NOx, CO2, and CH4, is significantly harming ecosystems and life worldwide. One promising methodology is converting pollutants into valuable chemicals via photocatalytic processes (by reusable photocatalysts). In this context, the present work aimed to produce a Nb2O5 photocatalyst nanofiber system by electrospinning to convert CO2. Based on the collected data, the calcination at 600 ∘C for 2 h resulted in the best condition to obtain nanofibers with homogeneous surfaces and an average diameter of 84 nm. As a result, the Nb2O5 nanofibers converted CO2 mostly into CO and CH4, reaching values around 8.5 μmol g−1 and 0.55 μmol g−1, respectively.

The current context, linked to environmental pollution problems, presents several demands related to communication aimed at organizations and citizens to achieve better levels of environmental sustainability. Medicines for home use are products that require specific guidelines for consumption and disposal and have specific legislation that guides the disposal of their leftovers or those that are expired, due to their potential and pollution of the environment. In this sense, this study intends to demonstrate how Design plays an important role, guiding individuals to proceed with the correct disposal and mitigating the impact of pollution of the environment by drugs. As for the methods, it presents part of the results of a master's research characterized as qualitative, which made use of documentary and field research to obtain its data. The results demonstrate how communication is an important sector to be considered within a circular network for the effectiveness of Public Policies aimed at Solid Waste Management, especially with regard to the Disposal of Expired or Disused Medicines for Home Use. In this sense, there is Design, as a tool to help consumers exercise their civic duty in the part that fits them in the shared responsibility for the life cycle of products provided for in the National Policy on Solid Waste.

The increase in global warming due to NOx, CO2, and CH4 harmfully different ecosystems and significantly prejudice world life. A promising methodology in this sense is the pollutant conversion into valuable chemicals from photocatalytic processes by reusable photocatalyst. In this way, the present work aimed to produce a Nb2O5 photocatalyst nanofibers system to convert CO2 by the electrospinning method. Based on the collected data, the nanofibers calcination at 600°C for 2 h resulted in the best condition to obtain a homogeneous surface with an average diameter of 84 nm. As a result, the Nb2O5 nanofibers converted CO2 mostly into CO and CH4, reaching values around 8.5 μmol g−1 and 0.55 μmol g−1, respectively.