Anatase TiO2 nanosheets supported on reduced graphene oxide (RGO) were synthesized via a one-step, solvothermal method. During the solvothermal step, graphene oxide (GO) was reduced to RGO, and, subsequently, anatase TiO2 with 73.7% exposed {001} facets was grown in situ on the surfaces of the RGO nanosheets. Compared with pure TiO2, the RGO/TiO2 hybrid nanocomposite had improved photoactivity as a result of effective photoinduced electron transfer from TiO2 to the RGO acceptor through interfacial interactions. Trapping tests showed that the oxidation of dye molecules proceeded for about 22% through the reaction with (•)OH radicals, and the remaining 78% occurred via direct interactions with holes. The holes left in TiO2 crystals were the main reason for the enhanced photocatalytic properties of the RGO/TiO2 composite. This paper not only reports the fabrication of highly active photocatalysts but also gives deeper insight into the photocatalytic mechanism of carbon/TiO2 composites.

the authors empirically study consumer choice behavior in the wake of a product-harm crisis, which creates consumer uncertainty about product quality. they develop a model that explicitly incorporates the impact of such uncertainty on consumer behavior, assuming that consumers are uncertain about the mean product quality level and learn about product quality through the signals contained in use experience and the productharm crisis and also that consumers are uncertain about the precision of the signals in conveying product quality and update their perception of this precision over time. they estimate this model using a scanner panel data set that includes consumer purchase history before, during, and after a product-harm crisis that affected Kraft Foods australia's peanut butter division in June 1996. the proposed model fits the data better than the standard consumer learning model, which assumes consumers are uncertain about product quality level but the precision of information in conveying product quality is known. this study also provides insights into consumers' behavioral choice responses to a product-harm crisis. Finally, the authors conduct counterfactual experiments based on the estimation results and provide insights to managers on crisis management.

No abstract

No abstract

TiO2-based nanomaterials could reach the maximal photoactivity when designing 0D/1D heterogenous structure with appropriate phase composition and high surface area.