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Highly Hydroxylated Porous Nanozirconia for Complete Trace Cr(VI) Removal
Nong, SY; Dong, WJ; Xiao, Y; Riaz, MS; Dong, CL; Zhao, YT; Liu, ZC; Wang, RQ; Huang, FQ
2020-04-24
Source PublicationACS APPLIED NANO MATERIALS
ISSN2574-0970
Issue4Pages:3315
SubtypeArticle
AbstractHexavalent chromium [Cr(VI)] is carcinogenic and mutagenic even at very low concentrations, yet there are still few effective methods to remove COO to an ultralow level (<10 ppb). Herein, highly hydroxylated and porous nanozirconia (nano-ZrO2) is prepared through a unique top-down microetching method, which simulates the formation of "Karst Landform" in nature. Specifically, BaZrO3 is utilized as the precursor to be etched to form porous ZrO2, while the particle shape is still maintained in spite of the removal of Ba atoms. X-ray photoelectron spectroscopy confirms that the as-prepared ZrO2 has a surface hydroxyl groups density of up to 72 nm(-2), which can be protonated in an acidic solution and hence chelated with electronegative Cr(VI) (Cr2O72-). Thus, a distribution coefficient K-d of 4.16 X 10(5) mL g(-1) is reached, which is the highest value for Cr(VI) adsorption at present. Therefore, this porous nano-ZrO2 shows fast and efficient adsorption of trace COO (Cr2O72-) from 2010 to 4.8-5.5 ppb within 60 s, which is far lower than the recommended concentration for drinking water (SO ppb; World Health Organization). With excellent recycling performance and high selectivity, this material can be applied in the terminal treatment system of drinking water. Moreover, the mechanism of this trace adsorption is also well investigated, which may guide future material designs in water treatment and the enrichment of trace elements.
DOI10.1021/acsanm.0c00017
WOS KeywordORGANIC FRAMEWORKS ; CR-VI ; ADSORPTION ; CHROMIUM ; MECHANISM ; BEHAVIOR ; CAPTURE ; IONS
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28117
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Nong, SY,Dong, WJ,Xiao, Y,et al. Highly Hydroxylated Porous Nanozirconia for Complete Trace Cr(VI) Removal[J]. ACS APPLIED NANO MATERIALS,2020(4):3315.
APA Nong, SY.,Dong, WJ.,Xiao, Y.,Riaz, MS.,Dong, CL.,...&Huang, FQ.(2020).Highly Hydroxylated Porous Nanozirconia for Complete Trace Cr(VI) Removal.ACS APPLIED NANO MATERIALS(4),3315.
MLA Nong, SY,et al."Highly Hydroxylated Porous Nanozirconia for Complete Trace Cr(VI) Removal".ACS APPLIED NANO MATERIALS .4(2020):3315.
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