Effect of Cu, Cr, S Doped TiO2 for Transparent Plastic Bar Reinforced Concrete
Round 1
Reviewer 1 Report
Dear authors, after after reading your publication I have only minor comments.
1) Can you specify the wavelenght of the visible light used for photocatalytic testing and compare it with the band gap energies concerning to the NO removal.
2) You claim that the acrylic polymer exhibit high transparency for light. Please can you specify in which range of wavelenghts?
3) Can you compare TiO2-doped powders with the concrete@TiO2-doped?
4) The Ordinary concrete was also treated with the TiO2-doped photocatalyst? (Fig. 18). If not, how do you explain quite high photocatalytic activity in NO removal?
5) Part of the section 4.1 is a description of metheodology and should be transferred to Experimental.
Author Response
Please see the attachment
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This paper describes the preparation of doped TiO2 for Transparent Plastic
Bar Reinforced Concrete. The elements Cu, Cr and S were used as dopants but nothing is discussed on the criteria for choosing these elements. Indeed, there are many works on the doping of TiO2 where the shift towards the visible light of the photocatalytic activity is rationalized – for example: Materials 2019, 12, 3874; doi:10.3390/ma12233874.
- The observation of Figure 5, particularly for sulfur, does not show a homogeneous mixture.
- Error bars must be shown in all figures containing experimental data.
- In all manuscript (including tables) the averages values with corresponding standard deviation must be shown corresponding to several independent assays.
- This paper contains a large number of figures. The number should be reduced to about half of that and the others sent to SI (particularly the photos and schemes).
- The discussion must include other similar photocatalytic results and comparatively discuss these with those described in this paper. The figures of merit of the new materials described in the paper must be stressed.
- A blank assay, using only concrete, should be present.
Author Response
Please see the attachmen
Author Response File: 
Author Response.docx
Round 2
Reviewer 2 Report
The authors have answered satisfactorily to the referee questions.
