ساخت نانوگل‌های cu2s و بررسی خواص نوری و نورگرمایی آن در دو ناحیه‌ مرئی و فروسرخ

در اﯾﻦ ﮐﺎر، ﻧﺎﻧﻮﮔﻞ ﻫﺎی cu2s ﮐﻪ ﯾﮏ ﻧﯿﻢ رﺳﺎﻧﺎی ﻧﻮع p و ﻏﯿﺮﺳﻤﯽ اﺳﺖ و دارای ﮔﺎف ﻧﻮاری ﻏﯿﺮﻣﺴﺘﻘﯿﻢ اﺳﺖ، ﺑﻪ روش ﺣﻼﻟﯽ-ﺣﺮارﺗﯽ ﺳﻨﺘﺰ و از ﻃﺮﯾﻖ آﻧﺎﻟﯿﺰﻫﺎی xrd و fesem ﺷﻨﺎﺳﺎﯾﯽ ﺷﺪﻧﺪ. ﺳﭙﺲ، ﺧﻮاص ﻧﻮری آﻧﻬﺎ از ﻃﺮﯾﻖ آﻧﺎﻟﯿﺰ uv-vis اﻧﺪازهﮔﯿﺮی و ﺑﺮای ﺑﺮرﺳﯽ ﭘﯿﻮﻧﺪﻫﺎی ارﺗﻌﺎﺷﯽ و ﺷﻨﺎﺳﺎﯾﯽ و ﻣﺸﺨﺺ ﮐﺮدن ﮔﺮوه ﻫﺎی ﻋﺎﻣﻠﯽ از آﻧﺎﻟﯿﺰ ft-ir اﺳﺘﻔﺎده ﺷﺪ. ﻫﻤﭽﻨﯿﻦ، ﺧﻮاص ﻧﻮرﮔﺮﻣﺎﯾﯽ اﯾﻦ ﻧﺎﻧﻮﮔﻞ ﻫﺎ در ﻣﺤﺪوده ﻧﻮر ﻣﺮﺋﯽ و ﻓﺮوﺳﺮخ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد اﯾﻦ ﻧﺎﻧﻮﮔﻞ ﻫﺎ در ﻫﺮ دو ﻣﺤﺪوده‌ ﻧﻮر ﻣﺮﺋﯽ و ﻓﺮوﺳﺮخ ﺧﻮاص ﻧﻮرﮔﺮﻣﺎﯾﯽ ﺧﻮﺑﯽ از ﺧﻮد ﻧﺸﺎن ﻣﯽ دﻫﺪ. در ﻧﺎﺣﯿﮥ ﻣﺮﺋﯽ، ﺑﺎ ﺗﺎﺑﺶ ﻧﻮر ﻣﺮﺋﯽ ﺗﺎﺑﯿﺪه ﺷﺪه از ﻻﻣﭗ ﻣﺘﺎل ﻫﺎﻟﯿﺪ ﺑﺎ ﺗﻮان 400 وات ﺑﺎ ﺷﺪت 1000 2^w/m ﺑﻪ ﻣﺪت 60 دﻗﯿﻘﻪ ﺑﻪ ﻣﺤﻠﻮل آب ﺣﺎوی g/l 30 از ° cu2s 23c اﻓﺰاﯾﺶ دﻣﺎ و در ﻧﺎﺣﯿﻪ ﻣﺎدون ﻗﺮﻣﺰ ﺑﺎ ﺗﺎﺑﺶ ﻟﯿﺰر 808 ﻧﺎﻧﻮﻣﺘﺮ ﯾﮏ اﻓﺰاﯾﺶ 44 درﺟﻪ ای در ﻣﺪت زﻣﺎن 15 دﻗﯿﻘﻪ ﺑﺮای ﻏﻠﻈﺖ 10 g/l از cu2s ﻣﺸﺎﻫﺪه ﺷﺪ. ﻫﻤﭽﻨﯿﻦ، ﺗﺒﺨﯿﺮ ﺳﻄﺤﯽ آب، در ﺣﻀﻮر اﯾﻦ ﻧﺎﻧﻮﮔﻞ ﻫﺎ ﺑﺎ ﺗﺎﺑﺶ ﻧﻮر ﻣﺮﺋﯽ ﺑﺮرﺳﯽ ﺷﺪ و ﻧﺸﺎن داد ﮐﻪ ﺑﺎ اﻓﺰاﯾﺶ ﻏﻠﻈﺖ اﯾﻦ ﻧﺎﻧﻮﮔﻞ ﻫﺎ تا g/l 30 تبخیر ﺳﻄﺤﯽ ﺗﺎ 4 ﺑﺮاﺑﺮ ﻧﺴﺒﺖ ﺑﻪ آب ﺧﺎﻟﺺ اﻓﺰاﯾﺶ ﻣﯽ ﯾﺎﺑﺪ.

fabrication of cu2s nanoflowers and investigation of its optical and photothermal properties in both visible and infrared regions

abstract: in this work, cu2s nanoflowers, which is a non-toxic p-type semiconductor and has an indirect band gap of 1.21 ev, were synthesized by solvothermal method and characterized through xrd and fesem analyses. then, their optical properties were measured through uv-vis, ft-ir and pl analyses. also, the photothermal properties of these nanoflowers were investigated in the range of visible and near infrared light. the results showed that these nanoflowers have good photothermal properties in both visible and infrared light ranges. in the visible region, by irradiating a water solution containing 20 g/l of cu2s, a temperature increase of 23 °c was observed during 60 min. and in the infrared region, with 808 nm laser radiation, a 44 °c increase was observed for a concentration of 10 g/l of cu2s. also, surface evaporation of water in the presence of these nanoflowers was investigated with visible light irradiation and showed that the water evaporation increases up to 4 times with increasing the concentration of these nanoflowers