Mn3O4 nanozyme coating accelerates nitrate reduction and decreases N2O emission during photoelectrotrophic denitrification by Thiobacillus denitrificans-CdS

References

ref title DOI material type comment
3866 680 Mn3O4 nanozyme coating accelerates nitrate reduction and decreases N2O emission during photoelectrotrophic denitrification by Thiobacillus denitrificans-CdS https://doi.org/10.1021/acs.est.0c02709 Metal oxide This work successfully constructed a Mn3O4 nanozyme-coated biosemiconductor, Thiobacillus denitrificans-cadmium sulfide (T. denitrificans-CdS@Mn3O4), via a simple, fast, and economic method. After Mn3O4 coating, the ROS were greatly eliminated; the concentrations of hydroxyl radicals, superoxide radicals, and hydrogen peroxide were reduced by 90%, 77.6%, and 26%, respectively, during photoelectrotrophic denitrification (PEDeN). T. denitrificans-CdS@Mn3O4 showed a 28% higher rate of nitrate reduction and 78% lower emission of nitrous oxide (at 68 h) than that of T.

Materials

ref material size size err size unit size type size comment BET b nanozyme b 10n b unit specific act sa 10n sa unit comment
7897 680 Mn3O4 10-100 nm TEM The TEM image of the T. denitrificans-CdS@Mn3O4 system also revealed that the particles were distributed on the bacterial cells and that the diameter of those particles ranged from 10 to 100 nm (Figure 2d), similar to that of T. denitrificans-CdS

Kinetics

ref material enzyme type substrate pH T km km err km 10n km unit vmax vmax err vmax 10n vmax unit kcat kcat err kcat 10n kcat unit kcat/km kcat/km 10n kcat/km unit comment
6575 680 Mn3O4 SOD 680

Applications

ref material application target method linear range linear ran unit LOD lod unit recovery comment
5610 680 Mn3O4 enhance the biosemiconductor performance