Density Functional Theory Study on the Adsorption Mechanism of Sulphide Gas Molecules on ?-Fe2O3(001) Surface
نویسندگان
چکیده
Sulphide gas is an impurity that affects the quality of natural gas, which needs reasonable storage and transportation. In this work, we investigated adsorption structure electronic behavior hydrogen sulfide (H2S), carbonyl sulfur (COS), methyl mercaptan (CH3SH) on sulphide molecules pure vacant ?-Fe2O3(001) surfaces by density functional theory with geometrical relaxations. The results show H2S CH3SH are mainly adsorbed in form Fe2O3(001) surface. On surface, they can be Fe atoms molecular dissociation. absolute value energy vacancy defect ?-Fe2O3 surface larger, states electron orbital hybridization more significant, stronger. charge differential Mulliken population analysis rearranged chemical bonds formed. affinity to slightly higher than CH3SH, while COS basically do not adsorb may related stable properties themselves.
منابع مشابه
Adsorption of ozone molecules on AlP-codoped stanene nanosheet: A density functional theory study
Density functional theory calculations were carried out to investigate the structural and electronicproperties of the adsorption of O3 molecules on AlP-codoped monolayers to fully exploit the gas sensingcapability of these two-dimensional materials. Various adsorption sites of O3 molecule on the considerednanosheets were examined in detail. The side oxygen atoms of the O3 mole...
متن کاملthe effect of traffic density on the accident externality from driving the case study of tehran
در این پژوهش به بررسی اثر افزایش ترافیک بر روی تعداد تصادفات پرداخته شده است. به این منظور 30 تقاطع در شهر تهران بطور تصادفی انتخاب گردید و تعداد تصادفات ماهیانه در این تقاطعات در طول سالهای 89-90 از سازمان کنترل ترافیک شهر تهران استخراج گردید و با استفاده از مدل داده های تابلویی و نرم افزار eviews مدل خطی و درجه دوم تخمین زده شد و در نهایت این نتیجه حاصل شد که تقاطعات پر ترافیک تر تعداد تصادفا...
15 صفحه اولExploration of the adsorption of caffeine molecule on the TiO2 nanostructures: A density functional theory study
The first principles were calculated to study the adsorption behaviors of caffeine molecules on the pristineand N-doped TiO2 anatase nanoparticles. Both oxygen and nitrogen in the caffeine molecule can reactstrongly with TiO2 nanoparticle. Thus, the binding sites were located on the oxygen or nitrogen atom ofthe caffeine, while the binding site of the TiO2 nanoparticle occurs ...
متن کاملDensity functional theory study of the adsorption of NO2 molecule on Nitrogen-doped TiO2 anatase nanoparticles
Adsorption of NO2 molecule on pristine and N-doped TiO2 anatase nanoparticles have been studied using the density functional theory (DFT) technique. The structural properties (such as bond lengths and bond angles) and the electronic properties (such as density of states, band structures and atomic partial charges) have been computed for considered nanoparticles. The result...
متن کاملDensity functional theory study of the adsorption of NO2 molecule on Nitrogen-doped TiO2 anatase nanoparticles
Adsorption of NO2 molecule on pristine and N-doped TiO2 anatase nanoparticles have been studied using the density functional theory (DFT) technique. The structural properties (such as bond lengths and bond angles) and the electronic properties (such as density of states, band structures and atomic partial charges) have been computed for considered nanoparticles. The result...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Inorganics (Basel)
سال: 2021
ISSN: ['2304-6740']
DOI: https://doi.org/10.3390/inorganics9110080