Adsorption kinetics of methyl blue using metal-modified barium lanthanum titanate as an effective absorbent

被引：10

作者：

Chang, Ai-Lun ^{[1
,2
]}

Ba-Son Nguyen ^{[3
]}

Van-Huy Nguyen ^{[4
]}

Hu, Chechia ^{[1
,2
,5
]}

机构：

[1] Chung Yuan Christian Univ, R&D Ctr Membrane Technol, Dept Chem Engn, Taoyuan 320, Taiwan

[2] Chung Yuan Christian Univ, Luh Hwa Res Ctr Circular Econ, Taoyuan 320, Taiwan

[3] HCMC Univ Technol & Educ, Dept Renewable Energy, Ho Chi Minh City 700000, Vietnam

[4] Binh Duong Univ, Fac Biotechnol, Thu Dau Mot 820000, Vietnam

[5] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2022年 / 276卷

关键词：

Adsorption; Metal doping; BaLa4Ti4O15; BaLa2Ti3O10; Methyl blue removal; NANOPARTICLES; WATER; PHOTOCATALYST; REDUCTION; HYDROXYL; DEFECT; DYE; NM;

D O I：

10.1016/j.matchemphys.2021.125363

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Metal (Ag, Zn, and Na)-modified Ba-La-Ti-oxide (BLTO) was prepared, characterized, and applied as an adsorbent for methyl blue (MB) removal. Na-BaLa4Ti4O15 exhibited MB adsorption capacities of 37.6 mg g-1 while that for Zn-BaTiO3/BaLa2Ti3O10 was 33.0 mg g-1; both of these are eight times higher than that of commercial TiO2 powder. The MB adsorption proceeds according to Langmuir and Freundlich isotherms and fits the pseudo-2nd-order kinetic model, that the operative mechanism is chemisorption and involves strong adsorbate-adsorbent interactions. This could be attributed to the tuning of crystallinity by adding different metal ions to BLTO. For instance, Zn-doping induced the cubic-tetragonal transition, whereas Na-doping led to reduced crystallinity and a nonhomogeneous distribution of cations at B-sites of the BLTO structure. In summary, the BLTO, with appropriate metal modifications, shows promise as an absorbent for MB removal and future environmental remediation.

引用

页数：9

共 32 条

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