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Constructing mesoporous phosphated titanium oxide for efficient Cr(III) removal
Wang, P; Sun, D; Zhang, SN; Huang, XY; Bi, QY; Qian, M; Zhao, W; Huang, FQ
2020-02-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
SubtypeArticle
AbstractHeavy metal removal by environmental-friendly nanostructured TiO2 adsorbent is a promising strategy to facilitate wastewater treatment. Here, a boiling water synthetic approach is explored to prepare mesoporous phosphated TiO2 (PTO) used for Cr(III) adsorption in polluted water. We obtain mesoporous 8-PTO (synthesized with 8% molar ratio of H3PO4) with a high specific surface area (278 m(2)/g), narrow size distribution ( < 5 nm), low pH(zpc) (pH of zero point of charge) value ( similar to 1.0), and abundant surface hydroxyl group, which is attributed to the introduction of H3PO4 during the hydrolysis process of TiCl4 in boiling water. Importantly, the obtained 8-PTO shows better thermal stability than pure TiO2 and retains mesoporous structure after thermal treatment owning to [PO4] tetrahedral incorporated into the network of [TiO6] octahedral. The optimized 8-PTO exhibits superior Cr(III) adsorption up to 92 mg/g in sewage, which makes it one of the best materials among TiO2 adsorbent known for Cr(III) Removal (10-83 mg/g). Additionally, the as-prepared mesoporous 8-PTO adsorbent possesses an excellent reusability without significant degradation and can largely avoid the generation of secondary contaminants. A linear relationship (R-2 = 0.9985) between adsorption capacity and hydroxyl content percentage of different PTO samples is revealed, indicating that the surface hydroxyl groups play a decisive role in the adsorption process. This study provides a facile approach to synthesize high specific surface area mesoporous phosphated TiO2 with rich surface functional groups for efficient Cr(III) removal in sewage.
DOI10.1016/j.jhazmat.2019.121278
WOS KeywordHEAVY-METAL REMOVAL ; MAGNETITE NANOPARTICLES ; AQUEOUS-SOLUTIONS ; ADSORPTION ; TIO2 ; CHROMIUM(III) ; BIOSORPTION ; SORPTION ; WATER ; IONS
Language英语
WOS Research AreaEngineering ; Environmental Sciences & Ecology
PublisherELSEVIER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28296
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, P,Sun, D,Zhang, SN,et al. Constructing mesoporous phosphated titanium oxide for efficient Cr(III) removal[J]. JOURNAL OF HAZARDOUS MATERIALS,2020.
APA Wang, P.,Sun, D.,Zhang, SN.,Huang, XY.,Bi, QY.,...&Huang, FQ.(2020).Constructing mesoporous phosphated titanium oxide for efficient Cr(III) removal.JOURNAL OF HAZARDOUS MATERIALS.
MLA Wang, P,et al."Constructing mesoporous phosphated titanium oxide for efficient Cr(III) removal".JOURNAL OF HAZARDOUS MATERIALS (2020).
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