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题名: Facile Synthesis of Silver Bromide-Based Nanomaterials and Their Efficient and Rapid Selective Adsorption Mechanisms Toward Anionic Dyes
作者: Tang, L; Wang, JJ; Wang, L; Jia, CT; Lv, GX; Liu, N; Wu, MH
刊名: ACS SUSTAINABLE CHEMISTRY & ENGINEERING
出版日期: 2016
卷号: 4, 期号:9, 页码:4617-4625
关键词: AgBr ; CTAB ; Selective adsorption ; Anionic dyes ; Kinetic and isotherm models
DOI: 10.1021/acssuschemeng.6b00743
通讯作者: Wu, MH (reprint author), Shanghai Univ, Shanghai Inst Appl Radiat, 333 Nanchen Rd, Shanghai 200444, Peoples R China. ; Wang, L (reprint author), Shanghai Univ, Inst Nanochem & Nanobiol, 99 Shangda Rd, Shanghai 200444, Peoples R China.
文章类型: 期刊论文
英文摘要: A novel adsorbent of AgBr-AgBr/CTAB nano materials, which was synthesized via Tollen's reagent with the aid of hexadecyltrimethy ammonium bromide (CTAB), showed an excellent high affinity to anions and was used for removal of organic dyes in aqueous solutions. The synthesized AgBr-AgBr/CTAB was thoroughly characterized by XRD, SEM, TEM, XPS, FTIR, TGA, DLS as well as zeta potential measurements. The adsorption property and capacity of AgBr-AgBr/CTAB for organic dyes were evaluated using methylene blue (MB), rhodamine B (RhB), acid red 18 (AR-18), orange G (OG), indigo carmine (IC), and methyl orange (MO) as models. The adsorption capacity of AgBr-AgBr/CTAB complex toward four anionic dyes OG, AR-18, IC, and MO solutions was 87.43 +/- 2.03 mg g(-1), 205.89 +/- 2.12 mg g(-1), 140.42 +/- 2.13 mg g(-1), and 104.6 +/- 1.59 mg g(-1), respectively. On the other hand, this adsorbent exhibited little adsorption ability toward two cationic dyes, MB (2.99 +/- 0.40 mg g(-1)) and RhB (2.96 +/- 0.60 mg g(-1)). Interestingly, AgBr-AgBr/CTAB could be applied to efficiently adsorb anionic dyes from binary cationic-anionic dye systems with a high separation factor, and such adsorbent could be reused at least 5 times with adsorption capacities above 95%. The removal of anionic dyes followed pseudo-first-order kinetics and Langmuir isotherm model, indicating that anionic dyes were monolayerly adsorbed on our as-prepared materials. To further elucidate the adsorption mechanism, the theoretical calculation based on first-principles was also provided. The results suggested R-SO3- groups were the active sites and electrostatic attraction was the dominating contribution for the adsorption of anionic dyes.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000382713100017
ISSN号: 2168-0485
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内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26506
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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