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- 저자 : Altaf Amna (검색결과 2 건)
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Alfryyan Nada,Irshad Amna,Altaf Sehar,Basha Beriham,Al-Buriahi M. S.,Alrowaili Z. A.,Sabeeh Humera,Din Muhammad Imran 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.1
The current study is based on the synthesis of lanthanum ferrite (LF), silver-doped lanthanum ferrite (AgLF), and its composite with CNTs (AgLF@CNT) for degradation of organic effluents under visible light. The physiochemical characteristics of synthesized nanomaterials were examined by X-ray diffraction technique (XRD), Fourier transforms infrared spectroscopy (FTIR) and UV–Visible spectroscopy. XRD results revealed that the synthesized product has a crystalline structure. Tauc plot method was used to analyze the bandgap energy of the prepared nanocatalysts. Bare and doped lanthanum ferrite showed bandgap energy of 2.72 eV and 1.81 eV, respectively. The % degradation shown by LF, AgLF and AgLF@CNT for the degradation of methylene orange was 37.93%, 53.98%, and 78.26%, respectively. AgLF@CNT showed 74.42% degradation of crystal violet at the rate of 0.007 min−1. AgLF@CNT has an effective visible efficiency of photocatalysis for methylene orange and crystal violet degradation and gives better photodegradation efficiency due to a large number of active sites, greater surface area, good oxidizer and greater stability of carbon nanotubes.
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A review of carbon-based materials and their coating techniques for biomedical implants applications
Hassan Sadia,Nadeem Aroosa Younis,Qaiser Hafsah,Kashif Amer Sohail,Ahmed Ammad,Khan Khushbukhat,Altaf Amna 한국탄소학회 2023 Carbon Letters Vol.33 No.4
Carbon-based materials have emerged as an excellent class of biomedical materials due to their exceptional mechanical properties, lower surface friction, and resistance to wear, tear, and corrosion. Experimental studies have shown the promising results of carbon-based coatings in the field of biomedical implants. The reasons for their successful applications are their ability to suppress thrombo-inflammatory reactions which are evoked as an immune response due to foreign body object implantation. Different types of carbon coatings such as diamond-like carbon, pyrolytic carbon, silicon carbide, and graphene have been extensively studied and utilized in various fields of life including the biomedical industry. Their atomic arrangement and structural properties give rise to unique features which make them suitable for multiple applications. Due to the specificity and hardness of carbon-based precursors, only a specific type of coating technique may be utilized for nanostructure development and fabrication. In this paper, different coating techniques are discussed which were selected based on the substrate material, the type of implant, and the thickness of coating layer. Chemical vapor deposition-based techniques, thermal spray coating, pulsed laser deposition, and biomimetic coatings are some of the most common techniques that are used in the field of biomaterials to deposit a coating layer on the implant. Literature gathered in this review has significance in the field of biomedical implant industry to reduce its failure rate by making surfaces inert, decreasing corrosion related issues and enhancing biocompatibility.
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