Exploring the temperature-induced structural evolution and optical properties of an acid-based geopolymer incorporating CuO and Fe

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2025-01-12 DOI:10.1007/s00289-025-05649-y

Houda Ettoumi, Mohamed Dammak, Mohamed Toumi

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引用次数: 0

Abstract

The synthesis of a Cu/Fe-acid-based geopolymer (CFASP) involved the combination of Metakaolin, CuO, and Fe filings with diluted phosphoric acid. X-ray diffraction (XRD) analysis unveiled the presence of two crystalline phases within the geopolymer matrix at room temperature: the pyrophyllite-2M1 type structure and (Cu, Fe)₃(PO₄)₂. Upon heating to 400 °C, the (Cu, Fe)₃(PO₄)₂ phase was retained, while the pyrophyllite-2M1 phase transformed into pyrophyllite-A1. Further heating to 600 °C resulted in the disappearance of (Cu, Fe)₃(PO₄)₂ peaks, leaving behind pyrophyllite-like structures, whereas at 1000 °C, iron and aluminum phosphate (Al, Fe)PO₄ and metaphosphate (Fe, Al)(PO₃)₃ emerged alongside an amorphous phase. Raman spectroscopy delineated various entities and bonds, hinting at zeolite formation and the presence of Cu₂O. The geopolymer network exhibited a uniform distribution of constituents with diverse structural configurations. Luminescence analysis uncovered fluorescence emission peaks and temperature-dependent bandgap energy, underscoring tailored optical properties essential for applications in construction and ceramics. The exceptional transparency and adjustable optical characteristics position CFASP favorably for innovative uses in architectural glazing and beyond.

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探索含CuO和Fe的酸基地聚合物的温度诱导结构演化和光学性质

将偏高岭土、氧化铜和铁屑与稀释的磷酸结合，合成一种铜/铁酸基地聚合物（CFASP）。x射线衍射（XRD）分析揭示了室温下地聚合物基体中存在两种晶相：叶叶石- 2m1型结构和（Cu, Fe）3(PO4)2。加热至400℃时，（Cu, Fe）3(PO4)2相保留，叶黄石- 2m1相转变为叶黄石- a1。进一步加热到600°C，导致（Cu, Fe）3(PO4)2峰消失，留下叶叶石状结构，而在1000°C时，铁和铝磷酸盐（Al, Fe）PO4和偏磷酸盐（Fe, Al）（PO3）3与非晶相一起出现。拉曼光谱描绘了各种实体和键，暗示了沸石的形成和Cu2O的存在。地聚合物网络的组成成分分布均匀，具有不同的结构构型。发光分析揭示了荧光发射峰和温度相关的带隙能量，强调了在建筑和陶瓷应用中定制的光学特性。卓越的透明度和可调的光学特性使CFASP在建筑玻璃和其他领域的创新应用中处于有利地位。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."