Recyclable Xanthan/TiO<sub>2</sub> Composite Cryogels towards the Photodegradation of Cr(VI) Ions and Methylene Blue Dye

<div>(a) Decrease of initial concentration of MB (17.5 <i>μ</i>mol L<sup>-1</sup>) as a function of time upon contact with XG (red symbol) or XG/TiO<sub>2</sub> 10% (blue symbol) cryogels at <span class="nowrap"><svg height="11.1467pt" id="M115" style="vertical-align:-0.3500004pt" version="1.1" viewbox="-0.0498162 -10.7967 45.0526 11.1467" width="45.0526pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M412 140C382 77 369 73 315 73H129L270 222C362 320 402 379 402 466C402 571 322 635 234 635C177 635 130 609 99 576L42 495L64 475C90 514 133 568 201 568C274 568 318 519 318 435C318 349 255 267 193 193C144 135 87 78 32 23V0H405C417 45 427 89 440 131L412 140Z"></path></g><g transform="matrix(.013,0,0,-0.013,6.24,0)"><path d="M153 550H386L412 615L406 623H120L82 318C104 327 142 338 184 338C294 338 347 275 347 187C347 112 305 39 221 39C160 39 119 71 97 89C88 97 80 96 71 90C59 80 50 67 49 57C48 45 52 36 66 23C80 9 123 -12 169 -12C221 -11 288 15 342 59C403 109 431 165 431 225C431 308 366 395 238 395C212 395 165 379 127 364L153 550Z"></path></g><g transform="matrix(.013,0,0,-0.013,15.386,0)"><path d="M535 290V340H323V533H265V340H52V290H265V84H323V290H535ZM535 -22V28H52V-22H535Z"></path></g><g transform="matrix(.013,0,0,-0.013,25.922,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,32.162,-5.741)"><path d="M339 262C339 340 273 403 193 403S48 340 48 262S113 121 193 121S339 184 339 262ZM283 262C283 210 242 168 193 168S104 210 104 262S144 356 193 356S283 314 283 262Z"></path></g><g transform="matrix(.013,0,0,-0.013,36.177,0)"><path d="M614 175C564 76 510 21 408 21C256 21 146 149 146 336C146 488 235 629 402 629C510 629 570 586 597 480L626 488C620 541 614 582 606 638C578 643 510 665 429 665C206 665 44 527 44 316C44 157 153 -15 402 -15C474 -15 558 5 586 11C604 45 629 119 643 165L614 175Z"></path></g></svg>.</span> (b) Fittings to first-order kinetic model. The control experiment was done in the absence of cryogels.</div>

International Journal of Polymer Science

fig9

Figure 9

Figure 9: Recyclable Xanthan/TiO<sub>2</sub> Composite Cryogels towards the Photodegradation of Cr(VI) Ions and Methylene Blue Dye 

International Journal of Polymer Science

Recyclable Xanthan/TiO2 Composite Cryogels towards the Photodegradation of Cr(VI) Ions and Methylene Blue Dye

Figure 9

Recyclable Xanthan/TiO₂ Composite Cryogels towards the Photodegradation of Cr(VI) Ions and Methylene Blue Dye