Supporting information

Transcription

1 Supporting information Platinum nanoparticle encapsulated metal organic frameworks for colorimetric measurement and facile removal of mercury (II) Huaping Li a, Huifang Liu a, Jidong Zhang b, Yuxiao Cheng b, Cuiling Zhang a*, Xinyu Fei a, Yuezhong Xian a* Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 20041, China Shanghai Entry-Exit Inspection and Quarantine Bureau, Shanghai , China *Corresponding authors (Cuiling Zhang); (Yuezhong Xian)

2 Figure S1 TEM image of PVP-stabilized Pt NPs. Inset is the size distribution histogram of Pt NPs with average diameter of 2.48 nm. Figure S2 TEM image of partial morphology of Pt 2. S-2

3 Figure S3 Representative energy dispersive X-ray (EDX) spectrum for Pt 2 composites. Figure. S4 TGA of (a) UiO-66-NH 2 and (b) Pt NP@UiO-66-NH 2. S-3

4 Figure S5 Pore-size distribution of UiO-66-NH 2 and Pt NP@UiO-66-NH 2. Figure S6 The effects of (A) temperature and (B) ph on the peroxidase-like activity of Pt NP@UiO-66-NH 2. The system contains 0.4 mm TMB, 25 mm H 2 O 2 and 20 μl Pt NP@UiO-66-NH 2 (1 mg/ml) and the signals at A 652 are collected at 15 min after initiation the reaction. S-4

5 Figure. S7 PXRD patterns of the Pt 2 before and after treated in aqueous solution of Hg 2+. Figure S8 XPS spectra of Pt 2 before (black line) and after (red line) treated in solution of Hg 2+. S-5

6 Figure S9 Adsorption isotherm fitted by Freundlich model. Figure S10 The pseudo second-order model for the removal of Hg 2+ by Pt 2. S-6

7 Figure S11 The effect of coexistence metal ions on the removal efficiency of Pt 2 for Hg 2+. Figure S12 The reusability of the Pt 2 nanocomposites for the adsorption of Hg 2+. Figure S13 XPS spectrum for Hg 4f electrons after adsorption of Hg 2+ by Pt 2 nanocomposites. S-7

8 Table S1 Comparison of the kinetic parameters of different peroxidase mimics Enzyme K m (m M) V m (10-8 M s-1) TMB H 2 O 2 TMB H 2 O 2 Pt NP@UiO-66-NH BSA-stabilized Pt NPs[1] citrate-capped Pt NPs[2] Fe 3 O 4 NPs[3] Horseradish Peroxidase[4] Table S2 Adsorption isotherm parameters for Hg 2+ by Pt NP@UiO-66-NH 2 Langmuir isotherm Freundlich isotherm qmax (mg g -1 ) KL (mg L -1 ) R 2 KF (mg g -1 ) 1/n R Table S3 Kinetic parameters for adsorption of Hg 2+ by Pt NP@UiO-66-NH 2 Experimental Pseudo-first-order kinetic model Pseudo-second-order kinetic model q e (mg g -1 ) q e (mg g -1 ) k 1 (min -1 ) R 2 q e (mg g -1 ) k 2 ((g mg -1 )/min R S-8

9 Table S4 Comparison the sensitivity and adsorption capacity of various MOFs Materials Linear range (μm) Detection limit (nm) Adsorption capacity (mg g -1 ) Ref. LnMOF / 5 MIL-53(Fe) MOF / 6 PCN / 7 Eu 3+ /CDs@MOF Zr-MOF(MFC-S) / / FJI-H12 / / Zr-DMBD / / Zn 4 O(L) 3 / / Pt NP@UiO-66-NH This work References (1) Li, W.; Chen, B.; Zhang, H.; Sun, Y.; Wang, J.; Zhang, J.; Fu, Y. BSA-stabilized Pt nanozyme for peroxidase mimetics and its application on colorimetric detection of mercury(ii) ions. Biosens. Bioelectron. 2015, 66, (2) Wu, G. W.; He, S. B.; Peng, H. P.; Deng, H. H.; Liu, A. L.; Lin, X. H.; Xia, X. H.; Chen, W. Citrate-Capped Platinum Nanoparticle as a Smart Probe for Ultrasensitive Mercury Sensing. Anal. Chem. 2014, 86, (3) Gao, L.; Zhuang, J.; Nie, L.; Zhang, J.; Zhang, Y.; Gu, N.; Wang, T.; Feng, J.; Yang, D.; Perrett, S.; Yan, X. Nat. Nanotechnol. 2007, 2, (4) Josephy, P. D.; Eli, T.; Mason, R. P. The Horseradish Peroxidase-catalyzed Oxidationof 3,5,3,5 -Tetramethylbenzidine. J. Biol. Mistry. 1982, 257, S-9

10 (5) Zhu, Y. M.; Zeng, C. H.; Chu, T. S.; Wang, H. M.; Yang, Y. Yi.; Tong, Y. X.; Sua, C. Y.; Wong, W. T. A novel highly luminescent LnMOF film: a convenient sensor for Hg 2+ detecting. J. Mater. Chem. A. 2013, 1, (6) Jia, J.; Xu, F. J.; Long, Z.; Hou, X.D.; Sepaniak, Michael. J. Metal organic framework MIL-53(Fe) for highly selective and ultrasensitive direct sensing of MeHg +. Chem. Commun. 2013, 49, (7) Yang, J.; Wang, Z.; Li, Y. S.; Zhuang, Q. X.; Zhao, W. R.; Gu, J. L. Porphyrinic MOFs for reversible fluorescent and colorimetric sensing of mercury(ii) ions in aqueous phase. RSC Adv. 2016, 6, (8) Xu, X. Y.; Yan, B. Fabrication and application of a ratiometric and colorimetric fluorescent probe for Hg 2+ based on dual-emissive metal organic framework hybrids with carbon dots and Eu 3+. J. Mater. Chem. C. 2016, 4, (9) Huang, L. J.; He, M.; Chen B. B.; Hu, B. A mercapto functionalized magnetic Zr-MOF by solvent-assisted ligand exchange for Hg 2+ removal from water. J. Mater. Chem. A, 2016, 4, (10) Liang, L. F.; Chen, Q. H.; Jiang, F. L.; Yuan, D. Q.; Qian, J. J.; Lv, G. X.; Xue, H.; Liu, L. Y.; Jiang, H. L.; Hong, M. C.; In situ large-scale construction of sulfurfunctionalized metal organic framework and its efficient removal of Hg(II) from water. J. Mater. Chem. A. 2016, 4, (11) Yee, K. K.; Reimer, N.; Liu, J.; Cheng, S. Y.; Yiu, S. M.; Weber, J.; Stock, N.; Xu, Z. Effective Mercury Sorption by Thiol-Laced Metal-Organic Frameworks: in Strong Acid and the Vapor Phase. J. Am. Chem. Soc. 2013, 135, S-10

11 (12) He, J.; Yee, K. K.; Xu, Z.; Zeller, M.; Hunter, A. D.; Chui, S. S.-Y.; Che, C. M. Thioether Side Chains Improve the Stability, Fluorescence, and Metal Uptake of a Metal-Organic Framework. Chem. Mater. 2011, 23, S-11