Experimenting with APAN Nanofibers

  • Published on
    12-Apr-2017

  • View
    193

  • Download
    13

Embed Size (px)

Transcript

Experimenting with APAN Nanofibers

Experimenting with APAN NanofibersEmily JengTaiwan Tech Trek 20141

1

National I-Lan University2

3

Air Pollution and Nanometer Particulate Measurement Laboratory3

PAN Solution

PAN: 0.800 gDMAC: 15 mL4-6 hrs

4

PAN: polyacrylonitrileDMAC: dimethylacetamide4

Electrospinning

NeedleRolling DrumSyringe (with solution)GeneratorTubing5

PAN Nanofibers6

Making APAN Nanofibers

15 g NaOH+85 mL water30 min reactionDETA+water+1 g Na2CO31 hour reaction

7

Cu Adsorption Experiments

8

ICP

9

Experimental Parameters ChangedPercentage of DETA added for reaction:0% (PAN nanofibers)10%20%30%Different Cu(II) Concentrations:5 ppm10 ppm20 ppm40 ppm10

RESULTS

11

Na2CO3PANDETAAPAN12

Effect of Concentration13

Effect of DETA

14

Adsorption Capacities5 ppm10 ppm20 ppm40 ppm0% DETA0.401 mg/g0.475 mg/g0.709 mg/g1.967 mg/g10% DETA1.072 mg/g2.316 mg/g3.303 mg/g5.793 mg/g20% DETA1.134 mg/g1.861 mg/g3.194 mg/g4.137 mg/g30% DETA1.230 mg/g2.430 mg/g4.778 mg/g8.048 mg/g

15

Kinetics Analysis

16

16

Kinetics ComparisonFirst Order5 ppm10 ppm20 ppm40 ppmR20.97540.93170.98810.9064Qe exp (mg/g)0.98531.8062.3242.458Qe calc (mg/g)1.1241.7912.2322.094k10.086820.064020.048130.06974

Second Order5 ppm10 ppm20 ppm40 ppmR20.9980.93270.94610.9378Qe exp (mg/g)0.98531.8062.3242.458Qe calc (mg/g)1.1202.4283.5313.263k20.13760.02380.28320.3065

17

Adsorption Isotherms

18

Adsorption Isotherms

19

Looking at the R2 values, it is clear that the Langmuir model fits the best for this experiment.Langmuir ModelR2bqm0.99851.743 L/mg2.710 mg/g

Freundlich ModelR2Kfn0.8911.521 mg/g3.010

20

20

Conclusion/Final ThoughtsPAN nanofibers APAN nanofibers Cu(II) Adsorption Experiments ICP AnalysisAs concentration increases, adsorption curves become less steep, but adsorption capacity increasesAs more DETA is added, adsorption capacity increasesExperiment fits the second order kinetic model and Langmuir adsorption isotherm21

Thank you!!

22

Recommended

View more >