Date of Award

1-2024

Document Type

Thesis

Degree Name

Master of Science in Chemical Engineering (MSChE)

Department

Chemical and Petroleum Engineering

First Advisor

Dr. Mohammad Tahir

Abstract

This research focuses on the development and application of Metal-Organic Frameworks (MOFs)-based nanocomposites for the photocatalytic removal of pharmaceutical contaminants, with a specific emphasis on ciprofloxacin (CIP). The photocatalytic degradation of CIP was investigated using as-synthesized photocatalysts of TiO2 nanowires (TiO2NWs), bare MOF of NH2-MIL-125, TiO2NW/NH2-MIL-125 composite, and Lanthanum (La)-doped composite. Intriguingly, the TiO2NW/NH2-MIL-125 composite exhibited the highest efficiency, achieving a photodegradation rate of 0.0111 min-1, surpassing the independent performances of bare MOF of NH2-MIL-125 and TiO2NW. The observed efficiency was attributed to the formation of a Z-scheme heterojunction which improves charge separation and the generation of active species (•O2– and •OH) under the induced solar irradiation. Furthermore, the first-order rate constant of 0.0111 min-1 estimated for the TiO2NW/NH2-MIL-125 photocatalyst demonstrates promising and competitive performance when compared to prior research. This study emphasizes the potential for enhancing MOF photocatalytic properties through formation of heterojunction with inorganic photocatalysts like TiO2, particularly for pharmaceutical wastewater treatment. This research presents a promising solution for addressing pharmaceutical contaminations and invites further exploration into MOFs-based photocatalysis, recognizing experimental limitations and the scarcity of relevant literature.

Arabic Abstract


ﺗﻄﻮﯾﺮ ﻣﺮﻛﺐ TiO2/NH2-MIL-125 ﻹزاﻟﺔ اﻟﺴﯿﺒﺮوﻓﻠﻮﻛﺴﺎﺳﯿﻦ ﺗﺤﺖ اﻹﺷﻌﺎع اﻟﺸﻤﺴﻲ اﻟﻤﺴﺘﺤﺚ

ﯾﺮﻛﺰ ھﺬا اﻟﺒﺤﺚ ﻋﻠﻰ ﺗﻄﻮﯾﺮ وﺗﻄﺒﯿﻖ اﻟﻤﺮﻛﺒﺎت اﻟﻨﺎﻧﻮﯾﺔ اﻟﻤﻜﻮﻧﺔ ﻣﻦ اﻟﮭﯿﺎﻛﻞ اﻟﻔﻠﺰﯾﺔ اﻟﻌﻀﻮﯾﺔ (MOFs) ﻹزاﻟﺔ اﻟﻤﻠﻮﺛﺎت اﻟﺪواﺋﯿﺔ ﻋﻦ طﺮﯾﻖ اﻟﺘﺤﻔﯿﺰ اﻟﻀﻮﺋﻲ، ﻣﻊ اﻟﺘﺮﻛﯿﺰ ﺑﺸﻜﻞ ﺧﺎص ﻋﻠﻰ اﻟﺴﯿﺒﺮوﻓﻠﻮﻛﺴﺎﺳﯿﻦ (CIP). ﺗﻤﺖ دراﺳﺔ ﺗﺤﻠﻞ CIP ﻋﻦ طﺮﯾﻖ اﻟﺘﺤﻔﯿﺰ اﻟﻀﻮﺋﻲ ﺑﺎﺳﺘﺨﺪام ﻣﺤﻔﺰات ﺿﻮﺋﯿﺔ ﻣُﺼﻨﱠﻌﺔ ﻣﻦ أﺳﻼك اﻟﻨﺎﻧﻮﯾﺔ TiO2(TiO2NWs)، و MOF اﻟﻤﺠﺮد اﻟﻤﺼﻨﻮع ﻣﻦ 125-NH2-MIL، و اﻟﻤﺮﻛﺐ TiO2NW/NH2-MIL-125، وﻣﺮﻛﺐ اﻟﻤﻨﺸﻂ ﺑﺎﻟﻼﻧﺜﺎﻧﻢ La)-doped). ﻣﻦ اﻟﻤﺜﯿﺮ ﻟﻼھﺘﻤﺎم أن اﻟﻤﺮﻛﺐ TiO2NW/NH2-MIL-125 أظﮭر أﻋﻠﻰ ﻛﻔﺎءة، ﺣﯿﺚ ﺣﻘﻖ ﻣﻌﺪل ﺗﺤﻠﻞ ﺿﻮﺋﻲ ﻗﺪره 52.4%، ﻣﺘﺠﺎوزًا اﻷداء اﻟﻤﺴﺘﻘﻞ ﻟﻜﻞ ﻣﻦ اﻟﮭﯿﺎﻛﻞ اﻟﻔﻠﺰﯾﺔ اﻟﻌﻀﻮﯾﺔ اﻟﻤﺠﺮدة اﻟﻤﻜﻮﻧﺔ ﻣﻦ 125-NH2-MIL و الTiO2NW . ﺗُﻌﺰى اﻟﻜﻔﺎءة اﻟﻤﻠﺤﻮظﺔ إﻟﻰ ﺗﻜﻮﯾﻦ وﺻﻠﺔ ﻣﺘﻐﺎﯾﺮة ﻋﻠﻰ ﺷﻜﻞ ﻣﺨﻄﻂ Z اﻟﺬي ﯾﻌﻤﻞ ﻋﻠﻰ ﺗﺤﺴﯿﻦ ﻓﺼﻞ اﻟﺸﺤﻨﺎت وﺗﻮﻟﯿﺪ اﻷﻧﻮاع اﻟﻨﺸﻄﺔ (O2– and •OH•) ﺗﺤﺖ اﻹﺷﻌﺎع اﻟﺸﻤﺴﻲ اﻟﻤﺴﺘﺤﺚ. ﻋﻼوة ﻋﻠﻰ ذﻟﻚ، ﻓﺈن ﺛﺎﺑﺖ ﻣﻌﺪل اﻟﺪرﺟﺔ اﻷوﻟﻰ اﻟﺒﺎﻟﻎ 0.0111 د-1 اﻟﻤﻘﺪر ﻟﻠﻤﺤﻔﺰ اﻟﻀﻮﺋﻲ 125-TiO2NW/NH2-MIL ﯾُﻈﮭﺮ أداءً واﻋﺪًا وﺗﻨﺎﻓﺴﯿًﺎ ﻋﻨﺪ ﻣﻘﺎرﻧﺘﮫ ﺑﺎﻟﺒﺤﺚ اﻟﺴﺎﺑﻖ. ﺗﺆﻛﺪ ھﺬه اﻟﺪراﺳﺔ ﻋﻠﻰ إﻣﻜﺎﻧﯿﺔ ﺗﻌﺰﯾﺰ ﺧﺼﺎﺋﺺ اﻟﺘﺤﻔﯿﺰ اﻟﻀﻮﺋﻲ ﻟﻠﮭﯿﻜﻞ اﻟﻔﻠﺰي اﻟﻌﻀﻮي ﻣﻦ ﺧﻼل ﺗﻜﻮﯾﻦ اﻟﺘﺮاﺑﻂ ﻏﯿﺮ اﻟﻤﺘﺠﺎﻧﺲ ﻣﻊ اﻟﻤﺤﻔﺰات اﻟﻀﻮﺋﯿﺔ ﻏﯿﺮ اﻟﻌﻀﻮﯾﺔ ﻣﺜﻞTiO2، ﺧﺎﺻﺔ ﻟﻤﻌﺎﻟﺠﺔ ﻣﯿﺎه ﻣﻌﺎﻣﻞ اﻷدوﯾﺔ. ﯾﻘﺪم ھﺬا اﻟﺒﺤﺚ ﺣﻼً واﻋﺪاً ﻟﻤﻌﺎﻟﺠﺔ اﻟﺘﻠﻮث اﻟﻨﺎﺗﺞ ﻋﻦ ﻣﻌﺎﻣﻞ اﻷدوﯾﺔ وﯾﺪﻋﻮ إﻟﻰ ﻣﺰﯾﺪ ﻣﻦ اﻻﺳﺘﻜﺸﺎف اﻟﺤﻔﺰ اﻟﻀﻮﺷﻲ اﻟﻘﺎﺋﻢ ﻋﻠﻰ ﻟﮭﯿﺎﻛﻞ اﻟﻔﻠﺰﯾﺔ اﻟﻌﻀﻮﯾﺔ، ﻣﻊ ادراك اﻟﻘﯿﻮد اﻟﺘﺠﺮﯾﺒﯿﺔ وﻧﺪرة اﻟﻤﻨﺸﻮرات اﻟﻌﻠﻤﯿﺔ ذات اﻟﺼﻠﺔ.

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