Browsing by Subject "Photocatalytic"

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Open Access
General strategy for fabrication of ordered one dimensional inorganic structures by electrospinning: structural evolution from belt to solid via hollow tubes
(Wiley-VCH Verlag GmbH & Co. KGaA, 2020-12-23) Senthamizhan, Anitha; Balusamy, Brabu; Çelebioğlu, Aslı; Uyar, T.
Super-structured hollow materials are the subject of intense research due to their attracting properties and diverse applications. Despite their significance, it still remains a crucial challenge to develop a simple and well-organized method to prepare the hollow tubes with controlled architectures. Herein, a general route to prepare structurally well-defined 1D zinc oxide (ZnO) structures by a single-spinneret electrospinning method coupled with thermal treatment is demonstrated for the first time and subsequently designated to identify high-performance materials for catalytic application. Two critical factors including tailoring the precursor amount and colloidal-stability of the precursor play critical role in tuning the structure precisely. The careful optimization of processing conditions enables chronological structural evolution from tubular to solid fiber structures composed of nanograins. These ZnO complex hollow structures showcase excellent photocatalytic performance; single nanograined wall hollow tubes manifest the high-catalytic performance over other samples with remarkable cycling stability. Benefitting from fabrication adaptability, different types of metal oxide hollow tubes are prepared that indicates the generality of the method. The proposed method postulates new insights for the development of electrospun hollow-structured fibers in a simple, cost-effective, and industrially feasible manner which holds apparent potential in many sectors.
Open Access
Structural, optical and photocatalytic properties of pvc/cds nanocomposites prepared by soft chemistry method
(Springer, 2020-09-15) Rouabah, N.; Boudine, B.; Nazır, Roshan; Zaabat, M.; Sebais, M.; Halimi, O.; Soltani, M. T.; Chala, A.
This work investigates the preparation of cadmium sulfde nanoparticles (CdS) embedded in the polymeric polyvinylchloride (PVC) matrix. PVC/CdS nanocomposite flms were prepared via sol–gel method with deposition by spin-coating on glass substrates. Efects of CdS nanoparticles on the structural, morphological, optical and photocatalytic properties of the synthetized nanocomposite were studied. Results of XRD and Raman analysis confrm the formation of CdS nanoparticles with hexagonal phase in the PVC matrix, with average crystallite size between 17 to 69 nm. The UV–vis spectroscopy reveals that the transmission is between 80 and 95% in the visible region, and a direct energy bandgap between 4.07 eV for 3.85 eV. The PL emission spectra indicate the interstitial cadmium defect states. In addition, the surface modifer (PVC) exert great infuence not only on the optical performance of the particles themselves but also on the size distribution of the particle in the PVC matrix. The photocatalytic study shows a good potential of PVC/CdS nanocomposites flms for MB degradation under UV light irradiation.