This work provided a synthetic strategy to improve TiC/TiO2 composite’s performance as photocatalyst by incorporating cross-linked xylan/PVA. The work is not very significant in the novelty. Key steps of synthesis (TiC oxidized in air for carbon doped TiO2, and similar synthesis of xylan/PVA/TiO2 composite) have been reported in other works. The performance of this catalyst is not very outstanding. I suggest a major revision and issues listed below need to be solved.
1. Some conclusions are not well supported by the data.
The slope of TGA curve (450℃ to 900℃) in Fig 2 indicates the oxidation of TiC but not a constant composition in that temperature range.
TiC@AR/PX is 5 times of TiC in the K value only in first order with a low R2 value, not in any mode.
2. Calculation of band gap energy for TiC@AR is not accurate. The linear region should be selected for the calculation. See details in the reference:
https://doi.org/10.1021/acs.jpclett.8b02892
3. The photocatalytic data is not convincing. Sudden degradations at around 90 min need to be verified, which were catalyzed by TiC and TiC@AR.
4. TEM image for TiC@AR is not clear enough to prove the TiO2 layer on TiC particles. Don’t mark all the particles with lines and curves. HRTEM needs to be added for further proof.
5. More literature work is needed. Similar catalysts need to be compared with to exhibit the significance of the synthesis. Proposed mechanism needs the support of references, or some experimental data.

Issues have been resolved with convincing data. I recommend it accepted for publication.