On the Selectivity of Simultaneous CO and N Reduction Using TiO/Carbon Sphere Photocatalysts Prepared by Microwave Treatment and Mounted on Silica Cloth.

This paper presents new photocatalysts obtained by treating carbon spheres (CS) and TiO in a microwave reactor at a pressure of 20 atm and a temperature of up to 300 °C for 15 min and then depositing TiO/CS composites on glass fibre cloths. Such highly CO-adsorbing photocatalysts showed photoactivity in the simultaneous water-splitting process, generating H, reducing CO to CO and CH, and reducing N to NH. In addition, calculations of the hydrogen balance involved in all reactions were performed.

CO Sorbents Based on Spherical Carbon and Photoactive Metal Oxides: Insight into Adsorption Capacity, Selectivity and Regenerability.

This work aimed to obtain hybrid composites based on photoactive metal oxide and carbon having adsorption properties. The materials, composed of titanium dioxide or zinc oxide and spherical carbon, were obtained from resorcinol-formaldehyde resin, treated in a solvothermal reactor heated with microwaves and then subjected to carbonization, were received. The functional groups of pure carbon spheres (unsaturated stretching C=C, stretching C-OH and C-H bending vibrations), CS/ZnO and CS/TiO samples were determined by FT-IR analysis.

New Insight on Carbon Dioxide-Mediated Hydrogen Production.

A new approach to hydrogen production from water is described. This simple method is based on carbon dioxide-mediated water decomposition under UV radiation. The water contained dissolved sodium hydroxide, and the solution was saturated with gaseous carbon dioxide.

The Effect of the Modification of Carbon Spheres with ZnCl on the Adsorption Properties towards CO.

Zinc chloride and potassium oxalate are often applied as activating agents for carbon materials. In this work, we present the preparation of ZnO/carbon spheres composites using resorcinol-formaldehyde resin as a carbon source in a solvothermal reactor heated with microwaves. Zinc chloride as a zinc oxide source and potassium oxalate as an activating agent were applied.

ZnO/Carbon Spheres with Excellent Regenerability for Post-Combustion CO Capture.

This paper examines the synthesis of the ZnO/carbon spheres composites using resorcinol-formaldehyde resin as a carbon source and zinc nitrate as a zinc oxide source in a solvothermal reactor heated with microwaves. The influence of activation with potassium oxalate and modification with zinc nitrate on the physicochemical properties of the obtained materials and CO adsorption capacity was investigated. It was found that in the case of nonactivated material as well as activated materials, the presence of zinc oxide in the carbon matrix had no effect or slightly increased the values of CO adsorption capacity.

Assessment of the Suitability of the One-Step Hydrothermal Method for Preparation of Non-Covalently/Covalently-Bonded TiO₂/Graphene-Based Hybrids.

A hybrid nanocomposites containing nanocrystalline TiO₂ and graphene-related materials (graphene oxide or reduced graphene oxide) were successfully prepared by mechanical mixing and the hydrothermal method in the high-pressure atmosphere. The presented X-ray photoelectron spectroscopy (XPS) study and quantitative elemental analysis confirm similar content of carbon in graphene oxide GO (52 wt% and 46 wt%, respectively) and reduced graphene oxide rGO (92 wt% and 98 wt%, respectively). No chemical interactions between TiO₂ and GO/rGO was found.

Antibacterial properties of TiO modified with reduced graphene oxide.

In this paper, the antibacterial activity of titanium dioxide modified with reduced graphene oxide (rGO) was presented. TiO/rGO photocatalysts were prepared by the hydrothermal method under elevated pressure at 180°C and heated at 100°C in Ar flow. The obtained photocatalysts were characterized by means of XRD, FTIR/DRS, UV-vis/DR, Raman spectroscopy and scanning electron microscopy (SEM).