Temperature-Driven Structural Evolution during Preparation of MCM−41 Mesoporous Silica

Materials, Journal Year: 2024, Volume and Issue: 17(8), P. 1711 - 1711

Published: April 9, 2024

This study explores the influence of micelles on evolution MCM−41’s pore structure via 24 h hydrothermal treatments in a range temperatures from 100 °C to 200 °C. MCM−41 was characterized using BET, SAXD, FTIR, TEM, and TG-DSC. The findings demonstrate that with temperature elevation 160 °C, undergo expansion, leading an enhanced lattice constant 4.50 nm 4.96 increase diameter 3.17 3.45 nm, while maintaining structural orderliness channels. Upon cooling, reversible contraction strategic addition water glass contribute reduction size. However, at threshold 180 SAXD (100) peak’s half-peak width surges by approximately 40% relative illustrating progressive disruption hexagonal configuration MCM−41. Coupled elevated silica dissolution higher alkaline solution, total disintegration ordered results drastic specific surface area 307 m2/g. These are beneficial developing transformation mechanisms materials designing mesoporous modulation innovatively.

Language: Английский

Synergistic preparation of zeolite A from coal gasification coarse slag and red mud for the adsorptive removal of organic dyes

Journal of Industrial and Engineering Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

Physicochemical Properties and Planting Performance of Artificial Soil Developed from Multiple Coal-Based Solid Waste Materials

Sustainability, Journal Year: 2024, Volume and Issue: 16(5), P. 1955 - 1955

Published: Feb. 27, 2024

Using coal-based solid waste (CSWM) to develop artificial soil (AS) can solve the shortage of planting in mine ecological restoration and realize resource utilization waste, which is a very promising research direction. This study used three common CSWM, coal gangue (CG), fly ash (FA), desulfurization gypsum (DG), prepare AS. The physicochemical properties AS, such as bulk density, specific gravity, porosity, field water capacity, available nutrient content, pH value EC value, were studied. Simultaneously, Elymus dahuricus was utilized pot experiments explore performance Results show that, CG content decreased, gravity AS porosity increased. Both capacity saturation demonstrated notable upward trend. results showed that plant growth best when 80% FA DG 20%. In comparison control group consisting pure CG, biomass optimal experimental exhibited significant increase 20.48%. verified feasibility making by combining various provides new pathway for mines.

Language: Английский