A ailable online a www.sciencedi ec .com
ScienceDi ec
Ene gy Repo s 8 (2022) 489–494
www.else ie .com/loca e/egy
The 8 h In e na ional Con e ence on Ene gy and En i onmen Resea ch ICEER 2021, 13–17
Sep embe
Sola ene gy o liquid was ewa e ea men wi h no el TiO2
suppo ed ca alys s
Rui C. Ma insa, Ângelo Sac asa, Sanja Jo ano ica,b, Pa ícia Al esa, Paula Fe ei aa,c,
João Gomesa,∗
aUni e si y o Coimb a, CIEPQPF, Depa men o Chemical Enginee ing, Facul y o Sciences and Technology, Rua Síl io Lima, Polo
II, 3030-790 Coimb a, Po ugal
bDepa men o Chemical Enginee ing, Facul y o Technology and Me allu gy, Uni e si y o Belg ade, Se bia
cDepa men o Chemical and Biological Enginee ing, ISEC, Rua Ped o Nunes, 3030-199 Coimb a, Po ugal
Recei ed 13 Janua y 2022; accep ed 27 Janua y 2022
A ailable online xxxx
Abs ac
Pho oca aly ic oxida ion is p omising echnology o emo al o ecalci an pollu an s om wa e . Sola ene gy can be
an in e es ing adia ion sou ce since he ope a ing cos s can be lowe . Howe e , he use o powde pho oca alys is a majo
d awback o he echnology since sui able sepa a ion echnologies a e equi ed and ca alys s eco e y is di icul . This wo k
aims o es he sui abili y o using polyme ic suppo s o immobilize TiO2in he eac o and apply i o pa abens emo al
om wa e by sola pho oca aly ic oxida ion. Polyu e hanes (PU) and polydime hylsiloxane (PDMS) memb anes we e p epa ed
and modi ied wi h TiO2. While PU ma e ials a e only able o adso b (35% in 1 h) pa abens whiche e he modi ica ion applied,
modi ied PDMS was able o p omo e pa abens pho oca aly ic oxida ion emo ing 20% in 1 h unde sola ene gy. Plasma/UV
modi ica ion was able o ac i e PDMS memb anes (16% o me hyl pa aben (MP) emo al) and u he en apmen o TiO2in
he polyme ic ma ix did no imp o e he p ocess (18% o MP emo al). Thus, only he supe icial TiO2was ac i e. Resul s
show ha PDMS is sui able ma e ial o suppo TiO2aiming pho oca aly ic was ewa e ea men p ocess using he Sun as a
clean and enewable ene gy sou ce.
©2022TheAu ho (s).PublishedbyElse ie L d. This isanopenaccessa icleunde heCCBY-NC-NDlicense
(h p://c ea i ecommons.o g/licenses/by-nc-nd/4.0/).
Pee - e iew unde esponsibili y o he scien i ic commi ee o he 8 h In e na ional Con e ence on Ene gy and En i onmen Resea ch, ICEER, 2021.
Keywo ds: Sola ene gy; Con aminan s o eme ging conce n; Pa abens; Polyme ic suppo s; Sola pho oca aly ic oxida ion; Suppo ed TiO2
1. In oduc ion
Public heal h and ecological conce ns ega ding he p esence o con aminan s o eme ging conce n such as
pha maceu icals and pe sonal ca e p oduc s (PPCPs) in wa e a e g owing. These compounds a e no e icien ly
∗Co esponding au ho .
E-mail add ess: [email p o ec ed] (J. Gomes).
h ps://doi.o g/10.1016/j.egy .2022.01.196
2352-4847/© 2022 The Au ho (s). Published by Else ie L d. This is an open access a icle unde he CC BY-NC-ND license (h p:
//c ea i ecommons.o g/licenses/by-nc-nd/4.0/).
Pee - e iew unde esponsibili y o he scien i ic commi ee o he 8 h In e na ional Con e ence on Ene gy and En i onmen Resea ch, ICEER,
2021.
R.C. Ma ins, ˆ
A. Sac as, S. Jo ano ic e al. Ene gy Repo s 8 (2022) 489–494
emo ed by he con en ional was ewa e ea men due o hei e ac o y cha ac e is ics. Thus, a e discha ged
un ea ed o na u al wa e cou ses and a e being de ec ed in wa e sou ces and hei po en ial impac is no well
known [1]. Among hose subs ances’ pa abens a e used as p ese a i e and an imic obial agen s in many PPCPs
[2]. Pa abens cons i u e an impo an g oup o conce n also due o hei addi i e es ogenic cha ac e . Thus, he
seek o sui able e ia y ea men p ocesses is a scien i ic challenge and di e en app oaches can be ound in he
li e a u e o he aba emen o hese con aminan s. Ad anced oxida ion p ocesses such as pho oca aly ic oxida ion,
pho oca aly ic ozona ion using sola ene gy as adia ion sou ce appea as sui able al e na i es o hei emo al
[3–5].
Pho oca aly ic oxida ion can be pe o med a ambien p essu e and empe a u e condi ions using a ca alys wi h
semiconduc o cha ac e is ics. This me hodology gains mo e po en ial specially i sola ene gy can be used as a
cos less and clean adia ion sou ce. TiO2is he mos usual pho oca alys in his app oach since i can p oduce
hyd oxyl adicals in he p esence o sui able adia ion. Typically, his ca alys is used as powde o minimize he
mass ans e esis ances as well as maximizing he ca aly ic a ea exposed o adia ion ene gy [6] Howe e , when
applied in suspension in he liquid bulk i b ings p oblems o he ca alys eco e y and euse. Al e na i ely, o
allow he ca alys euse, powde can be immobilized on o a suppo , ha can ha e di e en sou ces. In his s udy
will be ocus polyme ic suppo s, such as PU and silicones. A a e al. [7] immobilized N-TiO2on o he polys y ene
(PS) su ace o pho oca aly ic oxida ion o me hylene blue and compa ed i s pe o mance wi h N-TiO2powde .
The high amoun o N-TiO2on o PS su ace has simila esul s wi h he powde which means low di usional
esis ances. The e o e, he immobiliza ion o TiO2in a sui able suppo has se e al ad an ages o e i s use in
aqueous medium suspension. One o hem is he ac ha no expensi e pos - ea men is necessa y o he eco e y
o ca alys pa icles a e oxida ion om he pu i ied wa e enabling a con inuous ope a ion o he eac o [8].
Howe e , immobiliza ion o TiO2on a suppo may also b ing some disad an ages ha may comp omise oxida ion
e iciency. As an example, in e ac ion be ween sunligh pho ons as well as eac an s wi h he ca alys ’s su ace may
be educed. Addi ionally, pho oca aly ic eac ion is limi ed by he a e o mass ans e o eac an s be ween he
bulk luid and he ca aly ic su ace [9]. Finally, by inc easing he hickness o he ca alys ilm, he in e nal mass
ans e migh play a dominan ole while limi ing he pho oca alysis a he suppo su ace. The e o e, a possible
s a egy o maximize TiO2/pho ons/ eac an s in e ac ions is by p omo ing an e ec i e immobiliza ion o he ca alys
in he su ace o he suppo . This may be achie ed by se e al echniques and a plasma su ace ea men is one
he mos e ec i e, pa icula ly when he o iginal su aces ha e no chemically eac i e g oups [10].
In his wo k, h ee di e en ma e ials (one PDMS and wo PU) we e used o p epa e ilms. These ma e ials
p esen se e al cha ac e is ics which p esen hemsel es as highly ad an ageous o he pu pose o his wo k, namely
hei anspa ency and lexibili y as well as he abili y o adhe e o glass. The no el y o his wo k was ocused on he
assessmen o he oxida ion e iciency o pa abens when using hese polyme ic ma e ials as suppo ma ices o he
pho oca alys TiO2. Fo his pu pose, TiO2was immobilized in he polyme ic ilms ei he by en apmen (achie ed
du ing ilms p epa a ion) o supe icially (achie ed by plasma ollowed by UV i adia ion). The oxida ion e iciency
o TiO2was hen e alua ed o bo h immobiliza ion echniques by using a pa abens mix u e (me hyl-MP, e hyl-EP
and p opyl-PP pa aben). The use o low-cos , clean and enewable ene gy om he Sun o p omo e oxida ion is an
impo an ad an age o such p ocess when compa ed wi h o he ene gy sou ces such as UV lamps ha will inc ease
he was ewa e ea men ene ge ic cos .
2. Ma e ials and me hods
2.1. Chemicals
MP, EP and PP we e pu chased om Sigma-Ald ich. TiO2(Ae oxide Degussa P25) was pu chased o E onik
Indus ies. Desmopan®481 (481) and Desmopan®3330 (3330) we e ob ained om Baye Ma e ial Science AG and
Sylga d®184 (PDMS), a ki con aining wo pa s, a liquid silicon ubbe base and a cu ing agen , was pu chased
om DOW-Co ning. Dime hyl o mamide >95% (DMF) was acqui ed om Fishe Chemical.
2.2. Films p epa a ion and immobiliza ion o TiO2
Desmopan®based PU ilms we e p epa ed by cas ing (sol en e apo a ion). Desmopan®was dissol ed in DMF
o a 10% (w/ ) PU solu ion. This solu ion was pou ed in o glass Pe i pla es. Then, he Pe i dishes we e s o ed in
490
R.C. Ma ins, ˆ
A. Sac as, S. Jo ano ic e al. Ene gy Repo s 8 (2022) 489–494
an o en, a 60 ◦C o 24 h and a e wa ds 1 mm ilms we e ob ained and emo ed om he dishes. Sylga d®184
PDMS p e-polyme and c oss-linking agen we e mixed a he a io o 10:1 (w /w ) and degassed unde acuum.
Films wi h 2 mm hickness we e ob ained by cu ing a 65 ◦C du ing 4 h.
Se e al app oaches we e ollowed o immobilize TiO2in o he polyme ic memb anes. The i s me hod was
he en apmen o he pho oca alys in he polyme ic ma ix (E). Du ing his me hodology, 1.27 mg o TiO2/g o
polyme we e homogeneously mixed in he liquid polyme and once cu ing occu ed, a uni o m dis ibu ion o
he agen was ob ained. The o he app oach in ol ed he linkage o TiO2 o he su ace o he ilms, which was
achie ed by c ea ing adicals on he polyme ’s su ace by a gon plasma i adia ion (P). Fo ha pu pose, a labo a o y
and small-scale p oduc ion plasma sys em FEMTO (low p essu e plasma), manu ac u ed by Diene Elec onics,
wi h a s ainless-s eel plasma chambe o 100 mm diame e and 270 mm leng h, was used o he plasma su ace
modi ica ion expe imen s. The PU memb anes we e placed 80 mm om he elec ode. The memb anes we e plasma
ea ed wi h A gon, a chambe p essu e o 0.6 mba , o 2 min and ene gy powe o plasma o 100 W [11]. Then,
wo me hodologies we e e alua ed: a) a hin laye o TiO2solu ion (70 mg/L) was pou ed on o he plasma- ea ed
su ace and u he plasma i adia ed (Plasma); b) he plasma- ea ed memb anes we e dipped in o a (70 mg/L) TiO2
aqueous solu ion and UV ene gy i adia ed in an UV chambe (D . G obel UV-Elek onik GmbH, Model BS-02) o
30 min (plasma/UV). A e wa ds, all he ilms we e washed abundan ly wi h wa e and d ied un il cons an weigh .
Finally, a combina ion o bo h echniques was applied. The e o e, ilms wi h en apped TiO2we e p epa ed and
u he ea ed wi h plasma/UV ollowing he p e iously desc ibed me hodology (E+P).
2.3. Sola pho oca aly ic oxida ion expe imen s
The pho oca aly ic ac i i y o he p epa ed ma e ials was e alua ed unde sunligh condi ions and a da k
condi ions. Expe imen s we e ca ied ou a he Depa men o Chemical Enginee ing o he Uni e si y o Coimb a
(40.186622◦,−8.4182372◦). A mix u e o 3 pa abens: MP, EP and PP was p epa ed (1 mg/L o each in ul apu e
wa e ). A ci cula memb ane co e ing he glass eac o (50 mL) bo om we e placed and he liquid s i ing was
p omo ed by bubbling ai . The eac o is exposu e o he sunligh adia ion di ec ly wi hou any concen a o . The
a e age sola adia ion powe was a ound 700 ±150 W/m2du ing he expe imen s.
The concen a ion o pa abens du ing he expe imen s was measu ed by he high-pe o mance liquid ch oma og-
aphy (HPLC) equipped wi h a diode a ay de ec o (DAD) (UFLC, Shimadzu). The mobile phase is composed by
a a io o 50:50 o me hanol and ul apu e wa e acidi ied wi h 0.1% o phospho ic acid. The low a e o his phase
h ough he column C18 (SiliaCh om) a 40 ◦C was 0.5 mL/min. The de ec ion o pa abens was pe o med a a
wa eleng h o 255 nm.
3. Resul s and discussion
3.1. TiO2immobiliza ion me hodology e ec
The TiO2 immobiliza ion me hodology is a pa ame e ha may in luence he pho oca aly ic e ec o TiO2 o e
he pa aben’s mix u e deg ada ion. In a p ima y assessmen o he immobiliza ion me hodology e ec he 3 main
s a egies we e e alua ed: en apmen (E), plasma/UV ea men (P) and en apmen + plasma/UV ea men (E+P).
Fig. 1 shows pa abens emo al by pho oca aly ic oxida ion a e 1 h o sunligh ene gy (700 ±150 W/m2) exposu e
using as ca alys he ma e ials e e ed.
The pa abens emo al is no a unc ion o TiO2 immobiliza ion me hod when he suppo is PU (ei he 481
o 3330). S ill, he use o plasma/UV seems o sligh ly inc ease MP emo al when compa ed o he case whe e
he memb anes we e no subjec ed o plasma ea men , p obably due o he inc ease in hei hyd ophilici y
[10]. Di e en esul s a e ound o PDMS memb anes. While deg ada ion was e y low (below han 5%) when
memb anes wi h en apped TiO2(E) we e used, emo als o abou 30% o PP we e ob ained when PDMS was
modi ied using plasma/UV and TiO2was added o he su ace. Mo eo e , no u he imp o emen was achie ed
when TiO2was added by bo h me hods (E+P). Thus, one may conclude ha only supe icial TiO2is a ailable o
he deg ada ion eac ions since i is exposed o bo h pollu an s and ligh ene gy. Ligh has u he di icul y on
eaching TiO2in he polyme ic ma ix. Besides, di usional esis ances di icul pollu an s o ge hose ac i e si es.
491
R.C. Ma ins, ˆ
A. Sac as, S. Jo ano ic e al. Ene gy Repo s 8 (2022) 489–494
Fig. 1. TiO2 immobiliza ion me hodology o e pa abens emo al o (a) Desmopan 481; (b) Desmopan 3330; (c) PDMS suppo s.
3.2. Selec ion o su ace modi ica ion me hodology
When wo king wi h hyd ophobic ma e ials, en apmen o he ca alys in he polyme ic ma ix may no be a
sui able app oach since no con ac o he wa e wi h he pho oca aly ic agen will occu . In such cases, and as
al eady con i med in Sec ion 3.1, polyme s’ su ace modi ica ion wi h immobiliza ion o he ca alys showed o be
a mo e con enien me hod, by p omo ing con ac be ween con aminan s and TiO2and leading o he p oduc ion
o hyd oxyl adicals. The deg ada ion o pa abens mix u e was used as e alua ion c i e ia o he selec ion o he
be e su ace immobiliza ion solu ion o TiO2(Plasma o Plasma/UV). This was pe o med using sunligh adia ion
(700 ±150 W/m2) along 1 h o exposu e (Fig. 2). The inco po a ion me hod o TiO2will ep esen an impo an
ole o he pa aben’s deg ada ion pe o mance.
Fig. 2. Su ace modi ica ion me hod o immobiliza ion o TiO2, (a) Desmopan 481; (b) Desmopan 3330; (c) PDMS suppo s.
The PUs (Desmopan 481 and Desmopan 3330) do no p esen signi ican di e ences in e ms o deg ada ion o
bo h inco po a ion me hods (Plasma and Plasma/UV). The esul s a e qui e simila bu sligh ly highe when UV
adia ion was used. Howe e , o PDMS his di e ence was mo e e iden which p o ed he bene icial e ec o UV
adia ion on TiO2inco po a ion. The applica ion o UV adia ion leads o a mo e hyd ophilic PDMS [12] which
has g ea ele ance o TiO2ac i i y since wa e wi h ca alys will p omo e he p oduc ion o hyd oxyl adicals. In
ac , wa e p esen s an impo an ole o he e iciency o mic ocon aminan s emo al and hyd ophilic memb ane
imp o es he pa abens deg ada ion (Fig. 2). Ano he ea u e ele an o his modi ica ion me hodology could be
ela ed wi h di usional esis ances. This modi ica ion could make he memb ane mo e pe meable allowing wa e
and con aminan s di usion o each ac i e si es o ca alys [12].
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R.C. Ma ins, ˆ
A. Sac as, S. Jo ano ic e al. Ene gy Repo s 8 (2022) 489–494
3.3. Suppo s adso p ion e ec
Rega ding o he p e ious esul s he bes pe o mance (Fig. 1) seems o be o PU memb anes. Meanwhile, i is
impo an o con i m i pa abens emo al is due o deg ada ion h ough he ca alys in e ac ion wi h sola ene gy o
i we e jus adso bed o he memb ane’s su ace. This analysis was made compa ing he pollu an s emo al a da k
condi ions esul s wi h hose ob ained by sola pho oca aly ic oxida ion o memb anes p epa ed by plasma/UV.
Also, he adso p ion capaci y a da k condi ions o he memb anes wi hou modi ica ion was assessed. In ac , he
mic ocon aminan s can be easily adso bed on o he polyme ic su ace, due o hei pola i y. I is also expec ed ha
he inc ease o chain leng h dec eases he pola i y which makes PP mo e nonpola han EP and e en mo e han MP.
Fig. 3 compa es he esul s using he modi ied memb anes a da k and sola condi ions. Fo compa a i e pu poses,
sola expe imen s we e also pe o med using non-modi ied memb anes.
Fig. 3. Compa ison o adso p ion and sola adia ion wi h and wi hou TiO2 o (a) Desmopan 481; (b) Desmopan 3330; (c) PDMS suppo s.
Fo PUs (481 and 3330), he deg ada ion o pa abens was almos negligible, which indica es hei adso p ion on
he memb ane su ace as he main mechanism behind hei emo al om wa e using hese ma e ials (Fig. 3a,b).
Besides, e en using he non-modi ied PU (Blank Sola expe imen s) i was possible o achie e a pa abens emo al
pe cen age simila o he one ob ained when he memb anes we e modi ied wi h TiO2(481 Sola and 3330 Sola ).
This highligh s ha only pollu an s adso p ion on he polyme ic memb ane is occu ing when PU ma e ials a e used.
Thus, he p esence o TiO2is no impo an o he p ocess no he in e ac ion wi h he sola ene gy. Mo eo e ,
i is possible o see he e ec o pa abens pola i y. The a e o adso p ion o each pa aben inc eased wi h he
dec ease o pola i y since PP p esen ed he highes emo al compa ing o he o he pa abens. On he o he hand, i
is possible o see pe o mance di e ences o he PDMS memb anes subjec ed o di e en condi ions. Fo he da k
condi ions and he memb ane wi hou TiO2 he pa abens deg ada ion was almos null. Unde he sunligh ene gy
(700 ±150 W/m2) wi h he TiO2inco po a ed on o he PDMS memb ane was possible o achie e abou 15% o
emo al o MP and EP while achie ing abou 30% o PP emo al. The e o e, i is possible o conclude ha wi h
he modi ied PDMS memb anes subjec ed o ligh ene gy, hyd oxyl adicals we e p oduced leading o pa abens
deg ada ion and he con aminan s emo al was no only due o adso p ion. The a es o hyd oxyl adical ega ding
o pa abens inc eases wi h he chain leng h [4]. Besides, he p esence o TiO2is c ucial o he pho oca aly ic
ac i i y since negligible pa abens emo al occu ed when PDMS memb ane wi hou TiO2was used unde sunligh
condi ions.
4. Conclusions
PU ma e ials we e only able o emo e pa abens om wa e by adso p ion and no ca aly ic oxida ion was
p omo ed. Con a ily, when PDMS memb anes we e es ed, pa abens adso p ion was negligible. Thus, pa abens
emo al by TiO2modi ied PDMS memb anes unde sola ene gy was achie ed by hyd oxyl adical’s p oduc ion
ollowed by o ganic con aminan s oxida ion. When compa ing he pe o mance o memb anes modi ied by di e en
493

R.C. Ma ins, ˆ
A. Sac as, S. Jo ano ic e al. Ene gy Repo s 8 (2022) 489–494
p ocesses i was concluded ha TiO2en apped in he polyme ic ma ix was no ac i e. Di e en ly, TiO2added o
PDMS su ace by Plasma/UV was he main esponsible o he pho oca aly ic ac i i y. This s udy p o ed o PDMS
suppo 30% o PP emo al in 1 h o eac ion. These esul s show ha PDMS is an in e es ing ma e ial o suppo
TiO2in pho oca aly ic was ewa e ea men s o e coming he d awback associa ed o he use o powde ca alys s.
Thus, his may p omo e he applica ion o pho oca aly ic oxida ion using clean and cheap sola ene gy o wa e
ea men and euse, gi ing a con ibu ion o ensu e access o a o dable, eliable, sus ainable and mode n ene gy
o all (SDG7).
CRediT au ho ship con ibu ion s a emen
Rui C. Ma ins: Concep ualiza ion, Fo mal analysis, W i ing – o iginal d a , W i ing – e iew & edi ing,
Funding acquisi ion. ˆ
Angelo Sac as: Da a cu a ion, In es iga ion, Fo mal analysis. Sanja Jo ano ic: Da a cu a ion,
In es iga ion, Fo mal analysis. Pa ´
ıcia Al es: W i ing – e iew & edi ing. Paula Fe ei a: Concep ualiza ion,
W i ing – e iew & edi ing. Jo˜
ao Gomes: Concep ualiza ion, Supe ision, W i ing – o iginal d a , W i ing – e iew
& edi ing, Funding acquisi ion.
Decla a ion o compe ing in e es
The au ho s decla e ha hey ha e no known compe ing inancial in e es s o pe sonal ela ionships ha could
ha e appea ed o in luence he wo k epo ed in his pape .
Acknowledgmen s
This wo k was inanced by Eu opean S uc u al and In es men Funds h ough Po ugal2020 by he p ojec
Pho oSupCa al – De elopmen o suppo ed ca aly ic sys ems o was ewa e ea men by pho o-assis ed p ocesses
(POCI-01-0247-FEDER-047545). The au ho s acknowledges Founda ion o Science and Technology – FCT
(Po ugal) by he inancial suppo s CEECIND/01207/2018 and UIDB/00102/2020. The au ho S.J. acknowledges
he g an BTI 08/2019 o he IAESTE in e nship, Po ugal unde he p o ocol be ween APIET and FCT.
Re e ences
[1] N.H. T an, M. Reinha d, K.Y-H. Gin, Occu ence and a e o eme ging con aminan s in municipal was ewa e ea men plan s om
di e en geog aphical egions-a e iew, Wa e Res 133 (2018) 182–217.
[2] M. Bosio, B. Souza-Cha es, J. Gomes, M. Gmu ek, R. Ma ins, E. Saggio o, M. Dezo i, J.P. Bassin, M.E. Quin a-Fe ei a, R.M.
Quin a-Fe ei a, Elec ochemical oxida ion o pa aben compounds and he e ec s o byp oduc s on neu onal ac i i y, Ene gy Rep 6
(2020) 903–908.
[3] T. Veleg aki, E. Hapeshi, D. Fa a-Kassinos, I. Poulios, Sola -induced he e ogeneous pho oca aly ic deg ada ion o me hyl-pa aben, Appl
Ca al B 178 (2015) 2–11.
[4] J. Gomes, I. Leal, K. Bedna czyk, M. Gmu ek, M. S elmachowski, A. Zaleska-Medynska, M.E. Quin a-Fe ei a, R. Cos a, R.M.
Quin a-Fe ei a, R.C. Ma ins, De oxi ica ion o pa abens using UV-A enhanced by noble me als – TiO2suppo ed ca alys s, J En i on
Chem Eng 5 (2017) 3065–3074.
[5] E. Domingues, F. Rod igues, J. Gomes, M.J. Quina, S. Cas o-Sil a, R.C. Ma ins, Sc eening o low-cos ma e ials as he e ogeneous
ca alys s o oli e mill was ewa e Fen on’s pe oxida ion, Ene gy Rep 6 (2020) 161–167.
[6] S.C.A. Sousa, J.C. Ca doso, O.C. Mon ei o, Imp o ed pe o mance o i ana e nanos uc u es o manganese adso p ion and pos e io
pollu an s pho oca aly ic deg ada ion, J Pho ochem Pho obiol A: Chem 378 (2019) 9–16.
[7] R. A a, O. Sacco, V. Vaiano, L. Rizzo, G.Y. To e, D. Sannino, Visible ligh ac i e N-doped TiO2immobilized on polys y ene as
e icien sys em o was ewa e ea men , J Pho ochem Pho obiol A Chem 348 (2017) 255–262.
[8] D. Mukhe jee, S. Ba ghi, A.K. Ray, P epa a ion and cha ac e iza ion o he TiO2immobilized polyme ic pho oca alys o deg ada ion
o aspi in unde UV and sola ligh , P ocesses 2 (2014) 12–23.
[9] R. Klaewkla, M. A end, W.F. Hoelde ich, A Re iew o mass ans e con olling he eac ion a e in he e ogeneous ca aly ic sys ems,
mass ans e - ad anced aspec s, InTech, ISBN: 978-953-307-636-2, 2011, pp. 667–684,
[10] H.R. Khaledian, P. Zol agha i, V. Elhami, M. Aghbolaghy, S. Kho am, A. Ka imi, A. Kha aee, Modi ica ion o immobilized i anium
dioxide nanos uc u es by a gon plasma o pho oca aly ic emo al o o ganic dyes, Molecules 24 (383) (2019).
[11] P. Al es, R. Ca doso, T.R. Co eia, B.P. An unes, I.J. Co eia, P. Fe ei a, Su ace modi ica ion o polyu e hane ilms by plasma and
ul a iole ligh o imp o e haemocompa ibili y o a i icial hea al es, Colloids Su B 113 (2014) 25–32.
[12] K. E imenko, W.E. Wallace, J. Genze , Su ace modi ica ion o Sylga d-184 Poly(dime hyl siloxane) ne wo ks by ul a iole and
ul a iole /ozone ea men , J Colloid In e ace Sci 254 (2002) 306–315.
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