Engineering Bipolar Covalent Organic Framework Membranes for Selective Acid Extraction DOI
Di Wu, Zhiwei Xing, Qing Guo

и другие.

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Nitric acid (HNO 3 ) is a vital industrial chemical, and its recovery from complex waste streams essential for sustainability resource optimization. This study demonstrates the effectiveness of bipolar covalent organic framework (COF) membranes with tunable ionic site distributions as solution this challenge. The are fabricated by layering anionic COF nanosheets on cationic layers, supported porous substrate. resulting exhibit significant rectifying behavior, driven asymmetric charge polarity intrinsic electric field, which enhances HNO transport. transmembrane diffusion coefficient 2.74 × 10 −5 cm 2 s −1 exceeds self‐diffusion rate NO − , leading to increased flux selectivity compared individual membranes. optimized membrane configuration achieves remarkable separation factors, ranging 22 242,000 HNO₃, in comparison other solutes such HCl, H SO 4 PO various metal salts an eight‐component mixed stream. results substantial increase HNO₃ purity, 12.5% 94.1% after single separation. With broad range materials versatility proposed design, work represents advancement chemical technologies.

Язык: Английский

Bandgap Engineering on UiO–66 Metal‐Organic Framework Derivatives for Solar‐Driven Seawater Desalination DOI Creative Commons

Qian Shao,

Yutong Ding, Wenxian Liu

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

Abstract The growing scarcity of freshwater, driven by climate change and pollution, necessitates the development efficient sustainable desalination technologies. Solar‐powered interfacial water evaporation has emerged as a promising solution; however, its practical implementation is hindered limited availability stable photothermal materials. Herein, bandgap engineering strategy via linker modification to enhance conversion capability metal‐organic frameworks (MOFs) reported toward solar‐driven desalination. By systematically introducing functional groups with varying electron‐donating electron‐withdrawing abilities, energy UiO–66–X (X = ─F, ─H, ─OH, ─NH 2 , ─(NH ) finely tuned. Density theory (DFT) calculations femtosecond transient absorption (fs–TA) spectroscopy reveal that stronger narrow MOFs, thereby improving their efficiency. optimized UiO–66–(NH material reaches peak surface temperature 58.7 °C when exposed simulated sunlight at ≈1 kW·m −2 efficiency 86.50% an rate 2.34 kg·m ·h −1 97.40%. This study presents novel approach for fine‐tuning in materials, offering pathway advanced solar technologies address global crisis.

Язык: Английский

Процитировано

2
Engineering Bipolar Covalent Organic Framework Membranes for Selective Acid Extraction DOI
Di Wu, Zhiwei Xing, Qing Guo

и другие.

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Nitric acid (HNO3) is a vital industrial chemical, and its recovery from complex waste streams essential for sustainability resource optimization. This study demonstrates the effectiveness of bipolar covalent organic framework (COF) membranes with tunable ionic site distributions as solution this challenge. The are fabricated by layering anionic COF nanosheets on cationic layers, supported porous substrate. resulting exhibit significant rectifying behavior, driven asymmetric charge polarity intrinsic electric field, which enhances HNO3 transport. transmembrane diffusion coefficient 2.74 × 10-5 cm2 s-1 exceeds self-diffusion rate NO3 -, leading to increased flux selectivity compared individual membranes. optimized membrane configuration achieves remarkable separation factors, ranging 22 242,000 HNO₃, in comparison other solutes such HCl, H2SO4, H3PO4, various metal salts an eight-component mixed stream. results substantial increase HNO₃ purity, 12.5% 94.1% after single separation. With broad range materials versatility proposed design, work represents advancement chemical technologies.

Язык: Английский

Процитировано

0
Engineering Bipolar Covalent Organic Framework Membranes for Selective Acid Extraction DOI
Di Wu, Zhiwei Xing, Qing Guo

и другие.

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Nitric acid (HNO 3 ) is a vital industrial chemical, and its recovery from complex waste streams essential for sustainability resource optimization. This study demonstrates the effectiveness of bipolar covalent organic framework (COF) membranes with tunable ionic site distributions as solution this challenge. The are fabricated by layering anionic COF nanosheets on cationic layers, supported porous substrate. resulting exhibit significant rectifying behavior, driven asymmetric charge polarity intrinsic electric field, which enhances HNO transport. transmembrane diffusion coefficient 2.74 × 10 −5 cm 2 s −1 exceeds self‐diffusion rate NO − , leading to increased flux selectivity compared individual membranes. optimized membrane configuration achieves remarkable separation factors, ranging 22 242,000 HNO₃, in comparison other solutes such HCl, H SO 4 PO various metal salts an eight‐component mixed stream. results substantial increase HNO₃ purity, 12.5% 94.1% after single separation. With broad range materials versatility proposed design, work represents advancement chemical technologies.

Язык: Английский

Процитировано

0