Solar-driven energy conversion is a promising technology for a sustainable energy future and environmental remediation, and an efficient catalyst is a key factor. Recently, metal halide perovskites(MHPs) have emerged ...Solar-driven energy conversion is a promising technology for a sustainable energy future and environmental remediation, and an efficient catalyst is a key factor. Recently, metal halide perovskites(MHPs) have emerged as promising photocatalysts due to their exceptional photoelectronic properties and low-cost solution processing, enabling successful applications in H_(2) evolution, CO_(2) reduction, organic synthesis, and pollutant degradation. Despite these successes, the practical applications of MHPs are limited by their water instability. In this review, the recently developed strategies driving MHPcatalyzed reactions in aqueous media are outlined. We first articulate the structures and properties of MHPs, followed by elaborating on the origin of instability in MHPs. Then, we highlight the advances in solar-driven MHPbased catalytic systems in aqueous solutions, focusing on developing external protection strategies and intrinsically water-stable MHP materials. With each approach offering peculiar sets of advantages and challenges, we conclude by outlining potentially promising opportunities and directions for MHP-based photocatalysis research in aqueous conditions moving forward. We anticipate that this timely review will provide some inspiration for the design of MHPbased photocatalysts, manifestly stimulating their applications in aqueous environments for solar-to-chemical energy conversion.展开更多
Anthraquinone-2-sulfonate（AQS） was employed in humus substitutes to evaluate the effects and influencing factors of U（VI） reduction by Shewanella oneidensis MR-1（S. oneidensis MR-1） under anaerobic condition. Th...Anthraquinone-2-sulfonate（AQS） was employed in humus substitutes to evaluate the effects and influencing factors of U（VI） reduction by Shewanella oneidensis MR-1（S. oneidensis MR-1） under anaerobic condition. The removal rate of U（VI） at 30 °C reaches 99.0% afterd 96 h with the p H value of 7.0 and AQS concentration of 1.0 mmol/L. The effective concentrations of AQS as the accelerator for U（VI） bioreduction are approximately 0.5-1.0 mmol/L. The bioreduction of U（VI） is inhibited when the concentration of AQS exceeds 2.0 mmol/L. The coexistence of ions, such as Cu2＋, Cr6＋, Mn2＋, shows a remarkable negative effect on the U（VI） reduction, and Zn2＋ shows less influence on the process compared with other tested ions. The U（VI） reduction is remarkably inhibited when the concentration of nitrate ion exceeds 1.0 mmol/L. Otherwise, no difference is found when the nitrate ion concentration is less than 0.5 mmol/L. Sulfate ion（5.0 mmol/L） slightly promotes the U（VI） reduction. Zero-valent iron（ZVI） promotes the U（VI） reduction by S. oneidensis, and the reduction rate improves with increasing the amount of ZVI in the range of 0-2.0 g/L. The XPS result indicates that uranium deposits on the cell surface are in U（VI） and U（IV） forms, and the majority of uranium in the solution is stable UO2.展开更多
基金City University of Hong Kong,Grant/Award Number:SIRG 7020022Hong Kong Research Grant Council(RGC),Grant/A ward Numbers:GRFCityU 11305419,GRF CityU 11306920,GRF CityU 11308721,GRF CityU11316522。
文摘Solar-driven energy conversion is a promising technology for a sustainable energy future and environmental remediation, and an efficient catalyst is a key factor. Recently, metal halide perovskites(MHPs) have emerged as promising photocatalysts due to their exceptional photoelectronic properties and low-cost solution processing, enabling successful applications in H_(2) evolution, CO_(2) reduction, organic synthesis, and pollutant degradation. Despite these successes, the practical applications of MHPs are limited by their water instability. In this review, the recently developed strategies driving MHPcatalyzed reactions in aqueous media are outlined. We first articulate the structures and properties of MHPs, followed by elaborating on the origin of instability in MHPs. Then, we highlight the advances in solar-driven MHPbased catalytic systems in aqueous solutions, focusing on developing external protection strategies and intrinsically water-stable MHP materials. With each approach offering peculiar sets of advantages and challenges, we conclude by outlining potentially promising opportunities and directions for MHP-based photocatalysis research in aqueous conditions moving forward. We anticipate that this timely review will provide some inspiration for the design of MHPbased photocatalysts, manifestly stimulating their applications in aqueous environments for solar-to-chemical energy conversion.
基金Projects(1117508111475080)supported by the National Natural Science Foundation of China+3 种基金project(13JJ3078)supported by the Natural Science Foundation of Hunan ProvinceChinaProject(14k083)supported by the Innovation Platform Open Fund Project of University in Hunan ProvinceChina
文摘Anthraquinone-2-sulfonate（AQS） was employed in humus substitutes to evaluate the effects and influencing factors of U（VI） reduction by Shewanella oneidensis MR-1（S. oneidensis MR-1） under anaerobic condition. The removal rate of U（VI） at 30 °C reaches 99.0% afterd 96 h with the p H value of 7.0 and AQS concentration of 1.0 mmol/L. The effective concentrations of AQS as the accelerator for U（VI） bioreduction are approximately 0.5-1.0 mmol/L. The bioreduction of U（VI） is inhibited when the concentration of AQS exceeds 2.0 mmol/L. The coexistence of ions, such as Cu2＋, Cr6＋, Mn2＋, shows a remarkable negative effect on the U（VI） reduction, and Zn2＋ shows less influence on the process compared with other tested ions. The U（VI） reduction is remarkably inhibited when the concentration of nitrate ion exceeds 1.0 mmol/L. Otherwise, no difference is found when the nitrate ion concentration is less than 0.5 mmol/L. Sulfate ion（5.0 mmol/L） slightly promotes the U（VI） reduction. Zero-valent iron（ZVI） promotes the U（VI） reduction by S. oneidensis, and the reduction rate improves with increasing the amount of ZVI in the range of 0-2.0 g/L. The XPS result indicates that uranium deposits on the cell surface are in U（VI） and U（IV） forms, and the majority of uranium in the solution is stable UO2.
