-
Ĉ2¬17+ӎ QUӂ MINH
1*+,Ç1&ӬU TӘNG HӦP VҰT LIӊU COMPOSITE ;Ò&7È&48$1*+Ï$75Ç11ӄN BiVO4 9¬ӬNG DӨNG TRONG XӰ /é&+Ҩ70¬8+Ӳ8&Ѫ'ѬӞI
È1+6È1*1+Î17+ҨY
&KX\rQQJjQK .ӻ ThuұW0{L7Uѭӡng 0mVӕ: 85.20.320
LUҰ19Ă17+Ҥ&6Ƭ
TP HӖ &+Ë0,1+7+È1* 1Ă0 2021
Trang 2Ĉ2¬17+ӎ QUӂ MINH
1*+,Ç1&ӬU TӘNG HӦP VҰT LIӊU COMPOSITE ;Ò&7È&48$1*+Ï$75Ç11ӄN BiVO4 9¬ ӬNG DӨNG TRONG XӰ /é&+Ҩ70¬8+Ӳ8&Ѫ'ѬӞI
È1+6È1*1+Î17+ҨY
&KX\rQQJjQK: Kӻ ThuұW0{L7Uѭӡng 0mVӕ: 85.20.320
LUҰ19Ă17+Ҥ&6Ƭ
TP HӖ &+Ë0,1+7+È1*1Ă0
Trang 3&iQEӝKѭӟQJGүQNKRDKӑF 1: 761JX\ӉQDuy Trinh &iQEӝKѭӟQJGүQNKRDKӑF: 3*676%L;XkQ7KjQK &iQEӝFKҩPQKұQ[pW PGS.TS 1J{0ҥQK7KҳQJ &iQEӝFKҩPQKұQ[pW: PGS.TS /rĈӭF7UXQJ
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Trang 4
NHIӊM VӨ LUҰ19Ă17+Ҥ&6Ƭ
+ӑWrQKӑFYLrQ Ĉ2¬17+ӎ48ӂ MINH MSHV: 1870276 1Jj\WKiQJQăPVLQK 1ѫLVLQK /ong An &KX\rQQJjQK .ӻWKXұW0{LWUѭӡQJ
I 7Ç1Ĉӄ7¬, 1JKLrQFӭu tәng hӧp vұt liӋXFRPSRVLWH[~FWiFTXDQJKyDWUrQnӅn BiVO4 Yjӭng dөng trong xӱ OêFKҩWPjXKӳXFѫGѭӟLiQKViQJQKuQWKҩy
TS NguyӉn Duy Trinh
Trang 5LӡLÿҫXWLrQHP[LQJӱi lӡi cҧPѫQÿӃQTXêWKҫ\F{Ĉҥi hӑc quӕFJLD7KjQKSKӕ Hӗ &Kt0LQK- 7UѭӡQJĈҥi hӑF%iFK.KRDÿmQKLӋWWuQK giҧQJGҥ\JL~SÿӥHPWURQJTXiWUuQKKӑFWұSWҥLWUѭӡng
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ĈRjQ7Kӏ QuӃ Minh
Trang 67Ï07ҲT LUҰ19Ă1
ĈӅ WjL ³1JKLrQFͱu t͝ng hͫp v̵t li͏u composite [~FWiFTXDQJKyD WUrQQ͉n
thӵc hiӋn tҥL3KzQJWKtQJKLӋm Khoa hӑc vұt liӋu ӭng dөng thuӝc ViӋQNƭWKXұW&{QJnghӋ cao - 7Uѭӡng Ĉ+ NguyӉn TҩW 7KjQK Trong luұQ YăQ Qj\ chҩW TXDQJ [~F WiF BiVO4 Yj tәng hӧp tӯ WtQKYӟi NiFe2O4 YjBiVO4 ÿmÿѭӧFSKiWWULӇQWK{QJTXDSKѭѫQJSKiSWKӫy nhiӋt &iFPүu tәng hӧSÿѭӧFSKkQWtFKEӣLFiFSKѭѫQJSKiSQKLӉu xҥ tia X ;5' NtQKKLӇQYLÿLӋn tӱ TXpW 6(0 Yj phә phҧn xҥ khuӃFKWiQ89-Vis (UV-Vis DRS) Yjquang phә WiQ[ҥ Raman KӃt quҧ cho thҩ\KuQKWKiLFӫa BiVO4 tinh khiӃt FyKuQKGҥQJEiWGLӋn vӟi bӅ mһt nhҹQFQJYӟLFiFKҥWWURQJNKLKuQKWKiLFӫa NiFe2O4 trҫQFyFiFKҥt nano vӟLÿѭӡQJNtQKWURQJNKRҧng 10 - 20 nm 3KkQWtFK('6-Mapping ÿm[iFQKұn ciFGҥQJKyDKӑc cӫa phӭc hӧp NiFe2O4/BiVO4 YjVӵ SKkQEӕ ÿӗQJÿӅu cӫDFiFQJX\rQWӕ 1LYj)HWUrQEӅ mһt BiVO4 KӃt quҧ SKkQWtFK;5'Yj89-Vis-DRS cho thҩy tҩt cҧ FiFPүXÿӅXFyFҩXWU~FWLQKWKӇ ӣ dҥng monoclinic-scheelite (m-V ÿѫQWLQKWKӇ YjFyWKӇ hҩSWKXQăQJOѭӧQJWURQJYQJiQKViQJQKuQWKҩy Trong WUѭӡng hӧp mүu 20% NiFe2O4/BiVO4, rҩt nhiӅu hҥWQDQRÿѭӧc lҳQJÿӑQJWKjQKNKӕi Oѭӧng lӟn, cho thҩy sӵ kӃt hӧp cӫDFiFKҥt nano NiFe2O4 WUrQEӅ mһt cӫa chҩW[~FWiFBiVO4 So vӟi BiVO4 tinh khiӃt, vұt liӋu tәng hӧp NiFe2O4/BiVO4 FyKLӋu suҩt quang [~FWiFFDRKѫQtrong viӋc SKkQKӫ\TXDQJUKRGDPLQH% 5K% Gѭӟi bӭc xҥ iQKViQJ
WUuQKSKkQKӫ\FiFFKҩWPjXKӳXFѫFrystal violet (CV) tҥi nӗQJÿӝ SSPYjOѭӧng chҩW[~FWiFmg/100 mL trong 5 giӡ KӃt quҧ cho thҩy BiVO4 tәng hӧp ӣ nhiӋWÿӝ 140 ƯC thӇ hiӋn tӕFÿӝ SKkQKӫy cao nhҩWÿҥWWUrQ 0% vӟi k = 11.36î 10-3 SK~W-1 KӃt quҧ QJKLrQFӭu chӍ ra rҵng, hoҥWWtQK[~FWiFTXDQJKyDYѭӧt trӝi cӫa BiVO4 do FyNtFKWKѭӟc tinh thӇ nhӓ, diӋQWtFKEӅ mһWULrQJOӟQYjNKҧ QăQJSKkQWiFKÿLӋn tӱ tӕt.Theo ÿy, viӋc chӃ tҥo chҩWEiQGүn vӟi sӵ kӃt hӧp cӫDFiFYұt liӋu tӯ WtQKFXQJFҩSFiLQKuQmӟi vӅ viӋFQkQJFDRKLӋu suҩWTXDQJ[~FWiFFӫDFK~QJ
Trang 7Subject: ³Research on the synthesis photocatalytic composite materials based
conducted at Advan Materials Lab of NTT Hi-Tech Insitute, Nguyen Tat Thanh university In this study, magnetic composite photocatalyst with NiFe2O4 and BiVO4 has developed through two-steps hydrothermal method Synthesized samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis diffusion reflectance spectra (UV-Vis DRS) The results show that the morphology of the bare BiVO4 had a decahedral shape with smooth surfaces along with particles, while the morphology of the bare NiFe2O4 had nanoparticles with the diameter in a range of 10-20 nm The EDS-Mapping analysis confirmed the chemical species of NiFe2O4/BiVO4 composite and uniform distribution of Ni and Fe elements over the BiVO4 surface From the results of XRD and UV-vis DRS, synthesized samples showed monoclinic-scheelite (m-s) structure and has a great wider absorption in the visible light range In the case of 20% NiFe2O4/BiVO4 samples, a lot of nanoparticles were deposited into large bulk, implying the incorporation of NiFe2O4 nanoparticles on the surface of BiVO4 catalyst Compared with the bare BiVO4, the NiFe2O4/BiVO4 composites had a higher photocatalytic efficiency for photodecomposition of rhodamine B (RhB) under visible LED light irradiation showed the highest degradation rate of 82,9% with k = ௗî-3min-1 Synthesized samples were evaluated for photocatalytic activity through the degradation of organic pigments crystal violet (CV) at a concentration of 20ppm and a catalyst content of 50 mg/100 mL for 5 hours The results showed that
due to the small crystalline size of BiVO4, large surface area and excellent electronic separation Therefore, the fabrication of semiconductors with a combination of magnetic materials provides new insight for the enhancement of their photocatalytic performance
Trang 8LӠ,&$0Ĉ2$1
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Trang 9.é+,ӊU VIӂT TҲT
AOP Advanced Oxidation Processes 4XiWUuQKR[\KyDQkQJFDR
Trang 10DANH MӨC BҦNG
Bҧng 3 1&iFORҥLKyDFKҩWÿѭӧc sӱGөQJWURQJNKyDOXұQ 22Bҧng 3.2 Thӡi gian lҩy mүXWURQJÿiQKJLiKoҥWWtQKTXDQJ[~FWiF 30Bҧng 4.1 ĈһFÿLӇm mүu vұt liӋu BiVO4 sau khi tәng hӧp tҥLFiFQKLӋWÿӝ NKiFQKDX 34Bҧng 4.2 ĈһFÿLӇm mүu vұt liӋu BiVO4, NiFe2O4 Yj1L)H2O4 / BiVO4 sau khi tәng
hӧp 35
Bҧng 4.3 7K{QJVӕ mҥng tinh thӇ cӫDFiFPүu vұt liӋu 37Bҧng 4.4 &iFWK{Qg sӕ mҥng tinh thӇ cӫa vұt liӋu BiVO4 Yj1L)H2O4/ BiVO4 41Bҧng 4.5 7tQKFKҩWKyDOêYjWKjQKSKҫQKyDKӑc cӫa mүu NiFe2O4 Yj
NiFe2O4/BiVO4 44
Bҧng 4.6 Bҧng thӕQJNrKҵng sӕ tӕFÿӝ NYjKӋ sӕ WѭѫQJTXDQR2 48
Trang 11+uQK 6ѫÿӗ QJX\rQOêNKҧ QăQJ[ӭFWiFTXDQJKyD 8
+uQK CҩXWU~FWLQKWKӇ (a) anatse, (b) brookite, (c) rutile cӫa TiO2 9
+uQK CҩXWU~FSKDWLQKWKӇ cӫa BiVO4 11
+uQK CҩXWU~FYQJFӫa tetragonal zircon BiVO4 YjPRQRFOLQLFVFKHHOLWH%L924 ÿѭӧFÿӅ xuҩt bӣL.XGRYjFiFFӝng sӵ 11
+uQK5 CҩXWU~F%L92NiӇu scheelite (a), s-t BiVO4 (b), m-s BiVO4 12
+uQK &ѫFKӃ phҧn ӭng cӫa vұt liӋu BiVO4 14
+uQK%uQKWKӫy nhiӋt 16
+uQK 4X\WUuQKWәng hӧp mүu BiVO4 24
+uQK 4X\WUuQKWәng hӧp vұt liӋu NiFe2O4 bҵQJSKѭѫQJSKiSWKӫy nhiӋt 26
+uQK 4X\WUuQKWәng hӧp vұt liӋu NiFe2O4/BiVO4 bҵQJSKѭѫQJSKiSWKӫy nhiӋt 28+uQK Phә XRD cӫDFҭXWU~FV-m BiVO4 Yj]-t BiVO4 31
+uQK 6ѫÿӗ QJX\rQWҳFVLQKUDFiFWtQKLӋu trong SEM 32
+uQK GiҧQÿӗ XRD chuҭn cӫa vұt liӋu BiVO4 36
+uQK Phә Raman cӫDFiFPүu vұt liӋu BiVO4 38
+uQK Ҧnh SEM cӫDFiFPүu (A) BVO_100, (B) BVO_120, (C) BVO_140, (D) BVO_160, (E) BVO_180, (F) BVO_200 39
+uQK GiҧQÿӗ XRD cӫa BiVO4 (A), 5% NiFe2O4/BiVO4 (B), 10% NiFe2O4/BiVO4 (C), 15% NiFe2O4/BiVO4 (D), 20% NiFe2O4/BiVO4 (E), 25% NiFe2O4/BiVO4 ) YjNiFe2O4 (G) 40
+uQK ҧnh SEM cӫa BiVO4 (A), 20% NiFe2O4/ BiVO4 % Yj1L)H2O4 |(C), phә EDX cӫa 20% NiFe2O4/ BiVO4 42
+uQK Phә phҧn xҥ khuӃFKWiQ89B9,6 $ YjQăQJOѭӧQJYQJFҩm (B) cӫDFiFvұt liӋu nano NiFe2O4, BiVO4 Yj1L)H2O4/BiVO4 43
+uQK HoҥWWtQKTXDQJ[~FWiFFӫDFiFPүXWURQJSKkQKӫy CV 46
+uQK Ĉӝng hӑc cӫDFiFPүu vұt liӋu 47
+uQK Phә hҩp thu UV-Vis trong CV cӫa mүu vұt liӋu BVO_140 47
+uQK 0jXVDXNKL[ӱ OêFӫa mүu vұt liӋu BVO_140 48
+uQK KӃt quҧ khҧRViWQӗQJÿӝ cӫa dung dӏch Crytal Violet cӫa mүu BVO_140 49
+uQK KӃt quҧ khҧRViWNKӕLOѭӧng vұt liӋX[~FWiFFӫa mүu BVO_140 50
+uQK HoҥWWtQK[~FWiFFӫa vұt liӋu nano NiFe2O4, BiVO4 Yj1L)H2O4/BiVO4 qua SKkQKӫy RhB 51
+uQK 4.14 Sӵ suy giҧPÿӝng hӑFOQ &Ƞ&