Scanning transmission X-ray microscopy studies of chromium hydroxide hollow spheres and nanoparticles formed by gamma radiation

作者：Wang Zhigiang; Alrehaily Leena; Joseph Jiju; Wren Jungsook Clara^*; Wang Jian; Sham Tsun Kong^*

来源：Canadian Journal of Chemistry, 2017, 95(11): 1146-1150.

DOI：10.1139/cjc-2017-0142

• chromium hydroxide
• hollow spheres
• gamma radiolysis
• scanning transmission X-ray microscopy
• X-ray absorption near edge structure

Amorphous chromium-containing solid nanoparticles and hollow spheres were formed as the intermediate product during the synthesis of Cr2O3 by gamma radiolysis of dichromate solution. Scanning transmission X-ray microscopy (STXM) is applied to investigate the electronic structure and chemical composition of this intermediate product (solid nanoparticles and hollow spheres). The STXM result obtained at O K-edge and Cr L-3,L-2-edge confirms that chromium in the sample exists as Cr3+ and that the solid nanoparticles and hollow spheres are both Cr(OH)(3). Combined with other techniques, a mechanism for gamma radiation induced formation of Cr2O3 nanoparticles via Cr(OH)(3) intermediates from dissolved dichromate is proposed.

• 出版日期2017-11
• 单位Saskatchewan; Saskatoon; Canadian Light Source Inc; Canadian Light Source Inc.