期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 18, 页码 15566-15576出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b04181
关键词
organosilica nanoparticles; phenol red; adsorbent; water remediation; nanomaterials
资金
- NIH [HL117048, HL137187]
- EPSRC [EP/L026287/1]
- American Cancer Society Institutional Research through the Moores Cancer Center, University of California, San Diego [14-250-42]
- Engineering and Physical Sciences Research Council [EP/L026287/1] Funding Source: researchfish
- EPSRC [EP/L026287/1] Funding Source: UKRI
Nanomaterials are promising tools in water remediation because of their large surface area and unique properties compared to bulky materials. We synthesized an organosilica nanoparticle (OSNP) and tuned its composition for anionic dye removal. The adsorption mechanisms are electrostatic attraction and hydrogen bonding between the amine on OSNP and the dye, and the surface charge of the OSNP can be tuned to adsorb either anionic or cationic dyes. Using phenol red as a model dye, we studied the effect of the amine group, pH, ionic strength, time, dye concentration, and nanomaterial mass on the adsorption. The theoretical maximum adsorption capacity was calculated to be 175.44 mg/g (0.47 mmol/g), which is higher than 67 out of 77 reported adsorbents. The experimental maximum adsorption capacity is around 201 mg/g (0.53 mmol/g). Furthermore, the nanoparticles are highly reusable and show stable dye removal and recovery efficiency over at least 10 cycles. In summary, the novel adsorbent system derived from the intrinsic amine group within the frame of OSNP are reusable and tunable for anionic or cationic dyes with high adsorption capacity and fast adsorption. These materials may also have utility in drug delivery or as a carrier for imaging agents.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据