Porous Glass with Layered Morphology Prepared by Phase Separation

Materials, Journal Year: 2025, Volume and Issue: 18(5), P. 1133 - 1133

Published: March 3, 2025

In this study, porous glass with controllable layered structure was successfully prepared by the phase-separation method, aim to develop a high-performance high-temperature catalytic (denitrification) material. Glass compositions different R values (n (Na2O)/n (B2O3)) were designed based on phase diagram of sodium borosilicate glass. The obtained heat treatment in temperature range and acid-leaching remove boron-rich phase. For adsorption separation process, pore is very ideal, due its high contact area, storage capacity easy mass transfer characteristics, which means it has efficiency. experimental results show that thickness silicon layer can be precisely controlled 2-23 μm adjusting time (1.25-10 h), material excellent stability (the parameters do not change significantly after calcination at 600 °C for 10 h). V2O5 (multiphase redox catalyst) uniformly loaded impregnation completely retained. formation process studied infrared, Raman spectroscopy SEM analysis. This study provides new strategy development customizable materials.

Language: Английский

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Enhancing the Substrate Specificity of Nitrilase toward Aliphatic Nitriles Based on Substrate Channel Design

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Language: Английский

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Kinetic Understanding of the Enhanced Electroreduction of Nitrate to Ammonia for Co3O4–Modified Cu2+1O Nanowire Electrocatalyst

Catalysts, Journal Year: 2025, Volume and Issue: 15(5), P. 491 - 491

Published: May 19, 2025

Electrocatalytic nitrate reduction reaction (NO3−RR) to ammonia (NH3) presents an alternative, sustainable approach production. However, the existing catalysts suffer from poor NH3 yield under lower concentrations of NO3−, and kinetic understanding bimetal catalysis is lacking. In this study, a Co3O4–modified Cu2+1O nanowire (CoCuNWs) catalyst with high specific surface area was synthesized effectively produce 10 mM KNO3 basic solution. CoCuNWs demonstrated rate 0.30 mmol h−1 cm−2 Faradaic efficiency (FE) 96.7% at −0.2 V vs. RHE, which 1.5 times higher than bare NWs. The synergistic effect between Co3O4 significantly enhanced both conversion yield. Importantly, it revealed that kinetically more easily saturated NO3− (NO2−) ions NWs, as evidenced by current density plateau occurring NOx− concentrations. addition, exhibit diffusion coefficient being 1.6 also indicates presence could promote adsorption on CoCuNWs. Moreover, ATR–SEIRAS analysis applied illustrate pathway CoCuNWs, follows formation key intermediate *NO2−, *NO, *NH2OH *NH3. This work strategy for constructing dual–metal NO3−RR provides insight understand perspective kinetics.

Language: Английский

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基于温度梯度反演扩散流速的实验研究

Infrared and Laser Engineering, Journal Year: 2025, Volume and Issue: 54(5), P. 20250070 - 20250070

Published: Jan. 1, 2025

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