Correction: Pontes do Nascimento et al. Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B. Materials 2020, 13, 2150

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1. Error in Figure

In the original publication [1], an error occurred in “Figure 3. Scanning electron micrographs of samples (a) and (b) ZnAl_2_O_4_–750; (c) and (d) NiAl_2_O_4_–950; (e) and (f) CoAl_2_O_4_–750”, specifically in Figure 3d. The image from Figure 3b was inadvertently duplicated and used again in Figure 3d. The figure’s label remains unchanged, but the image itself has been replaced. The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated. Figure 3 should be replaced with the following figure:

2. References

In the revised version of this article, two references underwent an exchange. References numbered 4 and 5 required modifications due to changes made during manuscript formatting. These references have been substituted with the following sources, which maintain the same numbering:

• Li, X.; Zhu, Z.; Zhao, Q.; Wang, L. 2011 replaces reference number 4.
• Rahnamaeiyan, S.; Nasiri, M.; Talebi, R.; Khademolhoseini, S. 2015 replaces reference number 5.

Consequently, the reference initially numbered 5 (Kapse, S.D.; Raghuwanshi, F.C.; Kapse, V.D.; Patil, D.R. Curr. Appl. Phys. 2012, 12, 307–312) has been renumbered as 30. And the references after 30 was changed to 31, 32, 33, etc.

• References in the Original

• 4. Nakatsuka, A.; Ikeda, Y.; Yamasaki, Y.; Nakayama, N.; Mizota, T. Cation distribution and bond lengths in CoAl_2_O_4_ spinel. Solid State Commun. 2003, 128, 85–90.
• 5. Kapse, S.D.; Raghuwanshi, F.C.; Kapse, V.D.; Patil, D.R. Characteristics of high sensitivity ethanol gas sensors based on nanostructured spinel Zn_1−x_Co_x_Al_2_O_4_. Curr. Appl. Phys. 2012, 12, 307–312.

• New References

• 4. Li, X.; Zhu, Z.; Zhao, Q.; Wang, L. Photocatalytic degradation of gaseous toluene over ZnAl_2_O_4_ prepared by different methods: A comparative study. J. Hazard. Mater. 2011, 186, 2089–2096.
• 5. Rahnamaeiyan, S.; Nasiri, M.; Talebi, R.; Khademolhoseini, S. Novel sol–gel method for synthesis of cobalt aluminate and its photocatalyst application. J. Mater. Sci. Mater. Electron. 2015, 26, 8720–8725.
• 30. Kapse, S.D.; Raghuwanshi, F.C.; Kapse, V.D.; Patil, D.R. Characteristics of high sensitivity ethanol gas sensors based on nanostructured spinel Zn_1−x_Co_x_Al_2_O_4_. Curr. Appl. Phys. 2012, 12, 307–312.