Direct atomization atomic absorption spectrometry for intact biological samples: Application to trace metal analysis in silkworm eggs and their hatched worms

Fujiwara, Kitao; Umezawa, Yoshio; Numata, Yu-ichi; Fuwa, Keiichirō; Fujiwara, Shizuo

doi:10.1016/0003-2697(79)90378-6

Cited by 6 publications

(1 citation statement)

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“…Most of the methods described in the literature used electrospinning precursor solutions, which consist of synthetic polymers. As a natural product, worm silk has been applied in various fields rather than garments, such as tissue engineering , optical fibers , drug delivery and biological analysis . Herein, we report the fabrication of ZnS/Carbon (ZnS/C) and ZnO porous films using Silk Fibroin (SF) as a template and using a pure zinc ion solution in external phase spinning solution.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Porous ZnS and ZnO Films by Coaxial Electrospinning for Highly Efficient Photodegradation of Organic Dyes

Wang

Liang

Cheng

et al. 2017

Photochem & Photobiology

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Porous ZnS and ZnO nano-crystal films were fabricated via a three-step procedure. First, Zn(CH 3 COO) 2 /Silk Fibroin nanofiber mats were prepared by coaxial electrospinning. Second, Zn(CH 3 COO) 2 /Silk Fibroin mats were immersed in NaS solution to react with S 2À to obtain ZnS/Silk Fibroin nanofiber mats. Finally, ZnO porous films were prepared by calcination of ZnS/Silk Fibroin composite mat at 600°C in air atmosphere. When ZnS/Silk Fibroin mats were calcinated in nitrogen, ZnS/Carbon composite mats were obtained accordingly. The resulting porous films were fully characterized. The ZnO porous films were the aggregation of ZnO nano-crystal with hexagonal wurtzite structure. The seize of ZnO was estimated in the range of 10-20 nm. Both of the ZnS and ZnO nano-crystal films exhibited high photocatalytic activities for the photodegradation of Methylene blue and Rhodamine B. It was also found that ZnO porous films are better than ZnS/Carbon nanofiber mats. In addition, photocatalysis of a real wastewater sample from a printing and dyeing company was conducted. The ZnO porous films exhibited excellent performance to treat the real samples. Moreover, the porous ZnO nano-crystal photocatalyst could easily be recycled without notable loss of catalysis ability.

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Section: Introductionmentioning

confidence: 99%