Enhanced Photocatalytic CO Reduction with Photothermal Effect by Cooperative Effect of Oxygen Vacancy and Au Cocatalyst.

CO conversion into chemical fuels is a sustainable approach to the concurrent mitigation of the energy crisis and the greenhouse effect. It is still urgently desirable but quite challenging to explore a promising catalyst for CO photoreduction due to the severity in the fast recombination of electron holes and the deficiency of active sites, which have a tremendous influence on the catalytic behavior. In this regard, mesoporous TiO nanospheres containing oxygen vacancies (OVs) and metallic Au nanoparticles (NPs) were successfully prepared and showed markedly enhanced CO reduction activity and CH selectivity by the simple combination of photocatalysis with the simultaneous photothermal effect under full-spectrum irradiation.

Ternary multifunctional catalysts of polymeric carbon nitride coupled with Pt-embedded transition metal oxide to enhance light-driven photothermal catalytic degradation of VOCs.

Light driven photothermal catalysis has been carried out by converting the light energy into heat to reach the light-off temperature of the reaction. Herein we have synthesized the ternary multifunctional catalysts of polymeric carbon nitride coupled with Pt-embedded transition metal oxide (Pt-Co/CN), for the catalytic degradation of toluene. Under the condition of space velocity of 30,000 mL/(gh) and concentration of 210 ppm, toluene conversion and CO mineralization can reach 90% and 83% over Pt-Co/CN, respectively.

MOF-Templated Preparation of Highly Dispersed Co/AlO Composite as the Photothermal Catalyst with High Solar-to-Fuel Efficiency for CO Methanation.

CH production from CO hydrogenation provides a clean approach to convert greenhouse gas CO into chemical energy, but high energy consumption in this reaction still restrains its further application. Herein, we use a light-driven CO methanation process instead of traditional thermocatalysis by an electrical heating mode, with the aim of greatly decreasing the energy consumption. Under UV-vis-IR light irradiation, the photothermal CO methanation over highly dispersed Co nanoparticles supported on AlO (Co/AlO) achieves impressive CH production rates (as high as 6036 μmol g h), good CH selectivity (97.

Superhydrophobic titania nanoparticles for fabrication of paper-based analytical devices: An example of heavy metals assays.

A new strategy has been introduced to successfully fabricate the hydrophobic barriers of PADs by using organofluorine-modified superhydrophobic TiO NPs. Superhydrophobic TiO-140 NPs with high-photoactivity can be converted to hydrophilicity by self-degradation of surface organic moieties under full spectrum light irradiation. Superhydrophobic TiO-RT NPs with low-photoactivity exhibits good hydrophobic stability under light irradiation.

Efficient promotion of charge transfer and separation in hydrogenated TiO/WO with rich surface-oxygen-vacancies for photodecomposition of gaseous toluene.

Oxygen-deficient TiO/WO constructed via the controllable temperature of hydrogen annealing is designed in view of combining the broad visible spectrum absorption with the prominent coupled semiconductor properties. Surface lattice disorder of TiO/WO arises at hydrogen annealing temperature of 200 and 300°C, while critical phase transition from TiO/WO to TiO/WO occurs at 400°C, both of which can introduce oxygen vacancies. The hydrogenated TiO/WO with rich surface-oxygen-vacancies exhibits much higher photocatalytic activity for decomposition of gaseous toluene than pristine TiO/WO under visible-light illumination (λ>420nm).

Solvothermal syntheses of Bi and Zn co-doped TiO with enhanced electron-hole separation and efficient photodegradation of gaseous toluene under visible-light.

This study investigated the effects of Bi doped and Bi-Zn co-doped TiO on photodegradation of gaseous toluene. The doped TiO with various concentration of metal was prepared using the solvothermal route and characterized by SEM, XRD, Raman, BET, DRS, XPS, PL and EPR. Their photocatalytic activities under visible-light irradiation were drastically influenced by the dopant content.