Ridhima Sharma , Sanghamitra Barman , Bonamali Pal
{"title":"负载zsm -5的粉煤灰- tio2 - cu杂化复合材料在可见光-太阳照射下对结晶紫的吸附和光催化活性的提高","authors":"Ridhima Sharma , Sanghamitra Barman , Bonamali Pal","doi":"10.1016/j.micromeso.2025.113892","DOIUrl":null,"url":null,"abstract":"<div><div>In the present investigation, Cu photo-deposited fly ash–TiO<sub>2</sub> (FT-Cu<sub>1</sub>) composites were synthesized. The prepared composite was modified with 1 wt%, 3 wt%, and 5 wt% of ZSM-5 zeolite and named as 1ZFT-Cu<sub>1</sub>, 3ZFT-Cu<sub>1</sub>, and 5ZFT-Cu<sub>1</sub>, respectively, for the removal of crystal violet dye. Experiments were conducted to evaluate the performance of the ZFT-Cu<sub>1</sub> composites (1, 3, and 5 wt% ZSM-5 loadings) for the adsorption and photocatalytic degradation of crystal violet under visible and solar light. Structural and optical characterizations were performed using UV–VIS DRS, FE-SEM, XRD, FTIR, and BET surface area analysis. The results demonstrated enhanced crystallinity, decreased agglomeration, and improved visible-light absorption due to incorporation of ZSM-5 zeolite into the FT-Cu<sub>1</sub> composite. Among the modified composites, the 3ZFT-Cu<sub>1</sub> composite (3 wt% ZSM-5 loading) showed the highest photocatalytic activity, achieving 98 % removal of CV dye (Q<sub>e</sub> = 27 mg/g) under visible light and 95 % removal (Q<sub>e</sub> = 20.24 mg/g) under solar light at catalyst dose of 5 mg, dye concentration of 5 mg/L, contact time of 180 min, and pH 9. The adsorption data were well-fitted to Freundlich isotherms confirming multilayer coverage, and the kinetics adhered to a pseudo-first-order model. The enhanced efficiency is attributed to the synergistic effects of Cu doping, porous ZSM-5, and fly ash support, which improved light absorption and dye adsorption. Furthermore, 3ZFT-Cu<sub>1</sub> retained 84 % degradation efficiency after five cycles, confirming good stability and reusability. The photodecomposition pathway of CV dye was identified through free radical trapping using hole scavengers, confirming its visible-light-active potential for dye-based wastewater treatment.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"400 ","pages":"Article 113892"},"PeriodicalIF":4.7000,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improved adsorption and photocatalytic activity of ZSM-5-loaded fly ash–TiO2–Cu hybrid composites for crystal violet removal under visible-solar light irradiation\",\"authors\":\"Ridhima Sharma , Sanghamitra Barman , Bonamali Pal\",\"doi\":\"10.1016/j.micromeso.2025.113892\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In the present investigation, Cu photo-deposited fly ash–TiO<sub>2</sub> (FT-Cu<sub>1</sub>) composites were synthesized. The prepared composite was modified with 1 wt%, 3 wt%, and 5 wt% of ZSM-5 zeolite and named as 1ZFT-Cu<sub>1</sub>, 3ZFT-Cu<sub>1</sub>, and 5ZFT-Cu<sub>1</sub>, respectively, for the removal of crystal violet dye. Experiments were conducted to evaluate the performance of the ZFT-Cu<sub>1</sub> composites (1, 3, and 5 wt% ZSM-5 loadings) for the adsorption and photocatalytic degradation of crystal violet under visible and solar light. Structural and optical characterizations were performed using UV–VIS DRS, FE-SEM, XRD, FTIR, and BET surface area analysis. The results demonstrated enhanced crystallinity, decreased agglomeration, and improved visible-light absorption due to incorporation of ZSM-5 zeolite into the FT-Cu<sub>1</sub> composite. Among the modified composites, the 3ZFT-Cu<sub>1</sub> composite (3 wt% ZSM-5 loading) showed the highest photocatalytic activity, achieving 98 % removal of CV dye (Q<sub>e</sub> = 27 mg/g) under visible light and 95 % removal (Q<sub>e</sub> = 20.24 mg/g) under solar light at catalyst dose of 5 mg, dye concentration of 5 mg/L, contact time of 180 min, and pH 9. The adsorption data were well-fitted to Freundlich isotherms confirming multilayer coverage, and the kinetics adhered to a pseudo-first-order model. The enhanced efficiency is attributed to the synergistic effects of Cu doping, porous ZSM-5, and fly ash support, which improved light absorption and dye adsorption. Furthermore, 3ZFT-Cu<sub>1</sub> retained 84 % degradation efficiency after five cycles, confirming good stability and reusability. The photodecomposition pathway of CV dye was identified through free radical trapping using hole scavengers, confirming its visible-light-active potential for dye-based wastewater treatment.</div></div>\",\"PeriodicalId\":392,\"journal\":{\"name\":\"Microporous and Mesoporous Materials\",\"volume\":\"400 \",\"pages\":\"Article 113892\"},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2025-10-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microporous and Mesoporous Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S138718112500407X\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S138718112500407X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Improved adsorption and photocatalytic activity of ZSM-5-loaded fly ash–TiO2–Cu hybrid composites for crystal violet removal under visible-solar light irradiation
In the present investigation, Cu photo-deposited fly ash–TiO2 (FT-Cu1) composites were synthesized. The prepared composite was modified with 1 wt%, 3 wt%, and 5 wt% of ZSM-5 zeolite and named as 1ZFT-Cu1, 3ZFT-Cu1, and 5ZFT-Cu1, respectively, for the removal of crystal violet dye. Experiments were conducted to evaluate the performance of the ZFT-Cu1 composites (1, 3, and 5 wt% ZSM-5 loadings) for the adsorption and photocatalytic degradation of crystal violet under visible and solar light. Structural and optical characterizations were performed using UV–VIS DRS, FE-SEM, XRD, FTIR, and BET surface area analysis. The results demonstrated enhanced crystallinity, decreased agglomeration, and improved visible-light absorption due to incorporation of ZSM-5 zeolite into the FT-Cu1 composite. Among the modified composites, the 3ZFT-Cu1 composite (3 wt% ZSM-5 loading) showed the highest photocatalytic activity, achieving 98 % removal of CV dye (Qe = 27 mg/g) under visible light and 95 % removal (Qe = 20.24 mg/g) under solar light at catalyst dose of 5 mg, dye concentration of 5 mg/L, contact time of 180 min, and pH 9. The adsorption data were well-fitted to Freundlich isotherms confirming multilayer coverage, and the kinetics adhered to a pseudo-first-order model. The enhanced efficiency is attributed to the synergistic effects of Cu doping, porous ZSM-5, and fly ash support, which improved light absorption and dye adsorption. Furthermore, 3ZFT-Cu1 retained 84 % degradation efficiency after five cycles, confirming good stability and reusability. The photodecomposition pathway of CV dye was identified through free radical trapping using hole scavengers, confirming its visible-light-active potential for dye-based wastewater treatment.
期刊介绍:
Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal.
Topics which are particularly of interest include:
All aspects of natural microporous and mesoporous solids
The synthesis of crystalline or amorphous porous materials
The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic
The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions
All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials
Adsorption (and other separation techniques) using microporous or mesoporous adsorbents
Catalysis by microporous and mesoporous materials
Host/guest interactions
Theoretical chemistry and modelling of host/guest interactions
All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.