**Conflict of interest**

There are no conflicts to declare.

*Photocatalytic Adsorbents Nanoparticles DOI: http://dx.doi.org/10.5772/intechopen.79954*

*Advanced Sorption Process Applications*

**5. Conclusions**

**Acknowledgements**

**Conflict of interest**

stable state without reacting with organic molecules due to their short lifetimes and because the contaminants are dispersed in the solution. Thus, when the dye is adsorbed, the transfer of electrons between the ROS and the contaminant becomes

Photocatalytic adsorbents nanoparticles have a tremendous potential to wastewater treatment for capture and degrade many contaminants. Coupling of adsorption and photocatalysis demonstrated to be an efficient process to overcome of the limitations presented by the separated techniques. α-Hematite and metal-organic frameworks have exhibited excellent adsorption performance for removing contaminants from aqueous solutions and superior photocatalytic capacities to degrade and mineralize many recalcitrant compounds in visible light. Some researches have been developed to couple the TiO2 properties with MOFs or α-Fe2O3, as well as other inorganic or organic compounds, to enhance the photocatalytic activity. As illustrated in this review, a range of photocatalytic adsorbents technologies have been proposed or are under active development for wastewater treatment, but many

The authors acknowledge the Community University of Chapecó and Region

more probable, increasing the efficiency of the process.

techniques are still at an experimental or pilot stage.

(Unochapecó), for technical and scientific support.

There are no conflicts to declare.

**74**
