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Insights into the physical properties and anisotropic nature of ErPdBi with an appearance of low minimum thermal conductivity
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作者 S K Mitro R Majumder +3 位作者 K M hossain md Zahid Hasan md emran hossain M A Hadi 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第1期398-406,共9页
We theoretically study the structural, elastic and optical properties of Er Pd Bi together with its anisotropic behaviors using density functional theory. It is observed that Er Pd Bi satisfies the Born stability crit... We theoretically study the structural, elastic and optical properties of Er Pd Bi together with its anisotropic behaviors using density functional theory. It is observed that Er Pd Bi satisfies the Born stability criteria nicely and possesses high quality of machinability. The anisotropic behavior of Er Pd Bi is reported with the help of theoretical anisotropy indices incorporating 3 D graphical presentation, which suggests that Er Pd Bi is highly anisotropic in nature. It is noticed that the minimum thermal conductivity is very low for Er Pd Bi compared to the several species. This low value of minimum thermal conductivity introduces the potentiality of Er Pd Bi in high-temperature applications such as thermal barrier coatings.In addition, deep optical insights of Er Pd Bi reveal that our material can be used in different optoelectronic and electronic device applications ranging from organic light-emitting diodes, solar panel efficiency, waveguides etc. to integration of integrated circuits. Therefore, we believe that our results will provide a new insight into high-temperature applications and will benefit for the development of promising optoelectric devices as well. 展开更多
关键词 Er Pd Bi minimum thermal conductivity ANISOTROPY density functional theory(DFT)
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Fabrication of Bi_2O_3/TiO_2nanocomposites and their applications to the degradation of pollutants in air and water under visible-light 被引量:7
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作者 Ashok Kumar Chakraborty md emran hossain +1 位作者 md Masudur Rhaman K M A Sobahan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第2期458-465,共8页
A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light (λ≥ 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was emplo... A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light (λ≥ 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2 nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3. 展开更多
关键词 nanoheterojunction Bi2O3/TiO2 composite photocatalyst pollutants visible-light
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