Jeffrey C.S. Wu

TL;DR: In this paper, the diffusion of electron mediator, Fe 2+ /Fe 3+, through Nafion membrane was investigated and the transfer rate of mediator ions was remarkably larger than the photoreaction rate, indicating that membrane did not delay the water-splitting reaction in the twin reactor.

Abstract: Artificial rock weathering can potentially fix a large amount of CO2 generated from industrial and other sources with a slight expense of mechanical energy. From technological, economic, and environmental perspectives, artificial rock weathering is a preferential method to dispose carbon dioxide. Carbonate and hydrogen carbonate ions are formed spontaneously when carbon dioxide is dissolved in an aqueous solution owing to the negative Gibbs free energy. The calcium silicate component of wollastonite reacts with carbonate ions and becomes calcium carbonate and silicate. Such a reaction is economically feasible because this transformation does not require energy infusion. The products are naturally stable and can be discharged safely without pollution. Experimental results indicated that, in an aqueous solution, 1 ton of wollastonite could fix nearly 140 kg of carbon dioxide. No carbonation was observed when using talc under our experimental conditions. The study indicate that the reaction rate of artificia...

TL;DR: In this paper, the effects of post-calcination treatment on the properties of the prepared TiO 2 thin films were studied, where X-ray diffraction, scanning electron microscope-energy dispersive spectrometry (SEM-EDS), and UV-V is absorption spectrometer were performed to reveal the crystallinity, surface morphology, chemical composition, and light absorbance.

TL;DR: In this article, two types of experimental photocatalytic hydrogenation and reduction of CO2 in the liquid phase and gas phase, respectively, were carried out under hydrogen, in the case of reaction in liquid phase, the highest yield of CH4 was found in the presence 5.5wt.% CuO/TiO2 and pure TiO2.

TL;DR: This work develops defect engineering at the metal–oxide interface to make photooxidation sites close to photoreduction sites to enable hole-driven CO oxidation at the Pt-TiO2 interface to occur, which opens up room-temperature alcohol decomposition on Pt nanoparticles to H2 and adsorbed CO.