Review Reports

Round 1

Reviewer 1 Report

In this paper, authors studied the effects of metal oxides for the water treatments. The roles pf transition metal oxides are investigated according the recently published works. In addition, the future utilization and development of such nanocomposites for efficient water purification system were described.

The review is interesting for the readers of this journal and it can be accepted for publication after minor revision:

1. The abstract is poor and can be improved by addition of the interesting points from the review, the particular goal of this work, and the originality this study.
2. The effects of metal type are not discussed. It will be better to add and compare the metal type for different metal oxide.
3. Authors could discuss the results obtained for the water treatments by comparison and addition of the metal oxide efficiency and reusability.
4. Figure 6 and 7 are in low quality and should be improved

Author Response

Reviewer #1 (Remarks to the Author):
In this paper, authors studied the effects of metal oxides for the water treatments. The roles of transition metal oxides are investigated according the recently published works. In addition, the future utilization and development of such nanocomposites for efficient water purification system were described.

The review is interesting for the readers of this journal and it can be accepted for publication after minor revision:

 

Comment 1.1: The abstract is poor and can be improved by addition of the interesting points from the review, the particular goal of this work, and the originality this study.

Response 1.1: Thank you for your kind words regarding the review article. The abstract has been improved in the revised article.

 

Comment 1.2: The effects of metal type are not discussed. It will be better to add and compare the metal type for different metal oxide.

Response 1.2: We appreciate for your suggestive comments. As suggested, we have modified the whole article under sub-headings discussing particular type of metal oxides like, Dye degradation by Titanium oxides, Dye degradation by Zinc oxides, Dye degradation by Iron oxides and so-on.

Comment 1.3: Authors could discuss the results obtained for the water treatments by comparison and addition of the metal oxide efficiency and reusability.

Response 1.3: The reusability section has been incorporated in the tables and compared with other metal oxides and nanocomposites.

Comment 1.4: Figure 6 and 7 are in low quality and should be improved
Response 1.4: Improved Figure 6 and 7 are incorporated in the revised article.

 

Reviewer 2 Report

This manuscript reviewed the research done concerning photo dye degradation via transition metal oxide, bimetallic oxides and their carbon supported counterparts on co-adsorbents, which is of certain significance for researchers. However, some revisions should be made to make the paper more convincing.

1. Title seems to be too general and not appropriate since the manuscript refers only to photo dye degradation in water purification. I suggest re-write it.
2. The Introduction section should be expanded when introducing researches concerning photo dye degradation via transition metal oxide, bimetallic oxides and their carbon nanocmposites in order to allow readers to easily understand the structure of the manuscript.
3. We are in the year 2021. I'd suggest using more recent references (above 2015).
4. Line 153. Replace ʺ3. Nanocomposites for Water Purificationʺ with ʺ3. Nanocomposites for photocatalytic dye degradationʺ.
5. Please try to optimize the quality of graphs included in Figures 6-8.
6. I suggest sections ʺDiscussion & Future Perspectivesʺ and ʺConclusionsʺ to be combined in one: ʺConclusions and perspectivesʺ.

Comments for author File: Comments.pdf

Author Response

Reviewer #2 (Remarks to the Author):
This manuscript reviewed the research done concerning photo dye degradation via transition metal oxide, bimetallic oxides and their carbon supported counterparts on co-adsorbents, which is of certain significance for researchers. However, some revisions should be made to make the paper more convincing.

Comment 2.1: Title seems to be too general and not appropriate since the manuscript refers only to photo dye degradation in water purification. I suggest re-write it.

Response 2.1: Thank you very much for kind suggestions to improve our review article. We have revised the manuscript and included your suggestions in the revised article.

The title has been modified to “Transition Metal Oxides and their Composites for Photocatalytic Dye Degradation”.

 

Comment 2.2: The Introduction section should be expanded when introducing researches concerning photo dye degradation via transition metal oxide, bimetallic oxides and their carbon nanocmposites in order to allow readers to easily understand the structure of the manuscript.

Response 2.2: Introduction has been improved in the revised article by introducing the transition metal oxide, bimetallic oxides and their carbon nanocomposites for photocatalytic dye degradation.

 

Comment 2.3: We are in the year 2021. I'd suggest using more recent references (above 2015).

Response 2.3: The revised article has been updated with related recent references.

  Comment 2.4: Line 153. Replace ʺ3. Nanocomposites for Water Purificationʺ with ʺ3. Nanocomposites for photocatalytic dye degradationʺ.

Response 2.4: Section 3 has been renamed as “Nanocomposites for photocatalytic dye degradation”

 

Comment 2.5: Please try to optimize the quality of graphs included in Figures 6-8.

Response 2.5: Improved Figure 6-8 are incorporated in the revised article.

Comment 2.6: I suggest sections ʺDiscussion & Future Perspectivesʺ and ʺConclusionsʺ to be combined in one: ʺConclusions and perspectivesʺ.

Response 2.6: Section 4 ʺConclusions and perspectives” has been modified as suggested.