TY - JOUR
T1 - Organosilica Nanoparticles with an Intrinsic Secondary Amine
T2 - An Efficient and Reusable Adsorbent for Dyes
AU - Chen, Fang
AU - Zhao, Eric
AU - Kim, Taeho
AU - Wang, Junxin
AU - Hableel, Ghanim
AU - Reardon, Philip James Thomas
AU - Ananthakrishna, Soundaram Jeevarathinam
AU - Wang, Tianyu
AU - Arconada-Alvarez, Santiago
AU - Knowles, Jonathan C.
AU - Jokerst, Jesse V.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/5/10
Y1 - 2017/5/10
N2 - 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.
AB - 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.
KW - adsorbent
KW - nanomaterials
KW - organosilica nanoparticles
KW - phenol red
KW - water remediation
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U2 - 10.1021/acsami.7b04181
DO - 10.1021/acsami.7b04181
M3 - Article
C2 - 28422482
AN - SCOPUS:85019199604
SN - 1944-8244
VL - 9
SP - 15566
EP - 15576
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 18
ER -