Biến tính bề mặt cryptomelane và hoạt tính xúc tác trong xử lý vocs

TR I H C QU C GIA TP HCM NGă I H C BÁCH KHOA TR N TR NG PHÚ BI N TÍNH B M T CRYPTOMELANE VÀ HO T TÍNH XÚC TÁC TRONG X LÝ VOCs SURFACE MODIFICATION OF CRYPTOMELANE AND CATALYTIC ACTIVITY IN VOCs ABATEMENT Chuyên ngành: K thu t Hóa h c Mã s : 8520301 LU NăV NăTH CăS TP H CHÍ MINH, tháng 08 n măβ0β2 Cơngătrìnhăđ Cán b h c hồn thành t i: Tr ngă i h c Bách Khoa ậ HQG-HCM ng d n khoa h c : TS Tr n Th y Tuy t Mai Cán b ch m nh n xét : TS Nguy n Qu c Thi t Cán b ch m nh n xét : TS Nguy năV năD ng Lu năv năth căs ăđ c b o v t iăTr ngày 04 tháng 08 n mă2022 ngă i h căBáchăKhoa,ă HQGăTp.ăHCM Thành ph n H iăđ ngăđánhăgiáălu năv năth căs ăg m: PGS TS Nguy n Quang Long ậ Ch t ch TS Ngơ Tr n Hồng D ng ậ Th ăkỦ TS Nguy n Qu c Thi t ậ y viên ph n bi n TS Nguy năV năD ngăậ y viên ph n bi n TS Nguy n M nh Hu n ậ y viên Xác nh n c a Ch t ch H iăđ ngăđánhăgiáăLVăvƠăTr ngành sau lu năv năđưăđ c s a ch a (n u có) CH T CH H Iă NG TR ng Khoa qu n lý chuyên NG KHOA K THU T HÓA H C TR I H C QU C GIA TP.HCM NGă I H C BÁCH KHOA - C NG HÒA Xà H I CH NGH AăVI T NAM c l p - T - H nh phúc NHI M V LU NăV NăTH CăS H tên h c viên: Tr n Tr ng Phú MSHV: 2070656 NgƠy,ătháng,ăn măsinh:ă04/11/1998 N iăsinh:ăTP HCM Chuyên ngành: K thu t Hóa H c Mã s : 8520301 I TÊNă TÀI: Tên Ti ng Vi t: Bi n tính b m t cryptomelane ho t tính xúc tác x lý VOCs Tên Ti ng Anh: Surface modification of cryptomelane and catalytic activity in VOCs abatement II NHI M V VÀ N I DUNG: - T ng h p v t li u K-OMS-2, Ag-OMS-2, Ni-OMS-2 Ag-Ni-OMS-2 - Kh oăsátăđ cătr ngăv t li u b ngăph ngăphápănhi u x tia X (XRD), quang ph Raman, kính hi năviăđi n t quét (SEM), phân tích thành ph n nguyên t kim lo i b ng ICP-MS, ch s oxy hóa trung bình c a Mn (Mn-AOS), đ ng nhi t h p ph - gi i h p ph N2, gi i h p ph O2 theoăch ngătrìnhănhi tăđ (O2-TPD) quang ph quangăđi n t tia X (XPS) - Kh o sát ho t tính xúc tác ph n ng oxy hoƠnătoƠnăh iăethanol III NGÀY GIAO NHI M V : 09/2021 IV NGÀY HOÀN THÀNH NHI M V : 06/2022 V CÁN B H NG D N: TS Tr n Th y Tuy t Mai Tp HCM, ngày CÁN B H NG D N TR CH NHI M B NG KHOA K THU T HÓA H C tháng n m 2022 MỌNă ÀOăT O L I C Mă N Em xin g i l i c m năchơnăthƠnhăđ n Ban Giám Hi uătr Khoa ậ ngă i h c Bách HQG TP HCM Khoa K thu t Hóa h căđưăh tr em su t th i gian h c t p làm vi c t iătr ng,ăc ngănh ăđưăt oăđi u ki n cho em th c hi năđ tài lu năv nănƠy Em xin bày t lòng bi tă năsơuăs căđ n th y cô b môn K thu t Hóa lý ậ Phân tích C mă năth y Nguy n Quang Long th y Lâm Hoa Hùng đưănhi t tìnhăt ăv n, h tr ki n th c cho em trình làm lu năv n.ăC mă năcôăNguy n PhúcăThanhăDuyăđưăh tr d ng c đ em có th hồn thành lu năv năthu n l i nh t C mă nă cácă b n sinh viên, h c viên cao h c, anh ch phịng thí nghi m Xúc tác phịng thí nghi m Hóa lý vìăđưăln ch d a tinh th n v ng ch c C mă năNguy n Th TrúcăPh nh ngăng c n.ă ng,ăNguy n Minh Hùng Nguy n Ng c Thi n, i b n đưăđ ng hành t đ i h c đ n cao h c, s năsƠngăgiúpăđ m i c bi t c mă năhaiăb n sinh viên ngăH ngăQu c Long Nguy n Gia Hân vìăđưăln bên c nh t nh ngăngƠyăđ u tiên th c hi n lu năv n, v t qua nh ng th iăđi m khóăkh nănh t Cu i cùng, em xin g i l i c mă năchơnăthƠnhăvƠăsơuăs căđ n cô Tr n Th y Tuy tăMai,ăng iăđưăluônăgiúpăđ ,ăđ ng viên,ăh ng d n t n tình cho em su t kho ng th i gian em h c t p làm vi c t i phòng thí nghi m Dùăđưăr t n l căđ hồn thi n lu năv năm t cách tr n v n nh tănh ngăsaiăsótă lƠăđi u khơng th tránh kh i R t mong nh năđ c nh ng ý ki năđóngăgópăt th y b n đ b năthơnăemăc ngănh ălu năv nănƠyăđ c hoàn thi n h n Trân tr ng TP H Chí Minh, ngày 04 thángă07ăn măβ0ββ H c viên th c hi n Tr n Tr ng Phú i TÓM T T LU NăV N Ơ nhi m khơng khí ln m t nh ng ch đ nh n đ c nhi u s quan tâm nh t toàn th gi i S phát th i h p ch t h uăc ăd bayăh i,ăđi n hình nh ăbenzen,ătoluene,ăformaldehydeăvƠăethanol,ăđ n t ho tăđ ng s ng h ng ngày c aăconăng l i nh s n xu t, xây d ng, giao thơng, th măchíăđ n t nh ng ngu năn ngă ng thay th cho nhiên li u truy n th ng, ch ng h nă nh ă x ngă sinhă h c Nhi u nghiên c uăđưăđ c th c hi n nh m x lý h iăethanolătrongăkhơngăkhí cácăđi u ki n t nhiên c a mơi tr ng, v y v n h n ch v hi u qu x lý tính kinh t Trong nghiên c u này, v t li u cryptomelane OMS-2 bi n tính v i Ag Ni s đ c ng d ngăđ x lỦăh iăethanolă nhi tăđ th p Các phân tích đ cătr ngăchoăth y v t li u M-OMS-2 (M = K, Ag, Ni, Ag-Ni) t ng h pătheoăph ng pháp h iăl uănhi t có c uătrúcăvƠăhìnhătháiăđ cătr ngăc a cryptomelane (XRD, ph Raman SEM), v i thành ph n nguyên t kim lo i phù h p v i lý thuy t (ICP-MS) Phân tích ch s oxy hóa trung bình c a Mn (Mn-AOS) cho th y q trình bi n tính crytomelane v i AgăvƠăNiăđưălƠmăt ngăMn-AOS t 3.6 (K-OMS-2) lên ~3.9 (Ag-Ni-OMS-β),ăc ngă nh ăc i thi năđángăk di n tích b m t riêng BET K t qu O2-TPD ghi nh n nh h ng c aădopantăđ n liên k t Mn-O vƠăđ linhăđ ng c a oxy b m t v t li u Phân tích XPS cho th yăhƠmăl ng l tr ng oxy b m t m uăđ ng pha t p Ag- Niăcaoăh năsoăv i đ năphaăt p V i n ngăđ banăđ u h iăethanolă~15000ăppm d̀ng khơng khí,ăđ chuy n hóa t ng c ng ethanol ( ) m u cryptomelane khơng bi n tính K-OMS-2 m u cryptomelane đ năphaă t p Ag-OMS-2, NiOMS-2 ch đ t l năl t 0.2 %, 8.1 % 5.4 % nhi tăđ ph n ng 28 C Trong đó, v t li u Ag-Ni-OMS-2 (cryptomelane đ ng pha t p Ag vƠ Ni) t raăv ho t tính xúc tác oxy hóa hoƠn toƠn ethanol đ t ~18.6 % t tr i v cùngăcácăđi u ki n kh o sát H nă th n a, gi m n ngă đ n p li u h iăethanol xu ng 2.5 l n (~6000 ppm), hi u qu x lỦăh iăethanolă 28 C Ag-Ni-OMS-2 t ng lên g p 3.3 l n (61.0 %).ă i u nƠy ph n ánh ti măn ngătoăl n c a lo i v t li u x lý h iăethanolănóiăriêngăvƠăVOCsănóiăchungă nhi tăđ th p ii C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an ABSTRACT Air pollution is always one of the most attention topics worldwide Emissions of volatile organic compounds, such as benzene, toluene, formaldehyde, and ethanol, come from human daily living activities such as using fuel sources for production, construction, and traffic, and even come from alternative energy sources to traditional fuels, such as biogasoline Many studies have been carried out to treat ethanol vapor in the air under natural environmental conditions, but treatment efficiency and economics are still limitations In this study, cryptomelane OMS-2 modified with Ag and Ni is applied to treat ethanol vapor at a low temperature Characterization analysis showed that the M-OMS-2 (M = K, Ag, Ni, Ag-Ni) materials synthesized by the reflux method have the characteristic structure and morphology of cryptomelane (XRD, Raman spectra and SEM), with metal compositions in agreement with the theory (ICP-MS) Analysis of the average oxidation state of Mn (Mn-AOS) showed that denaturation with Ag and Ni increased Mn-AOS from 3.6 (K-OMS-2) to ~3.9 (Ag-Ni-OMS-2), also improving the BET specific surface area O2-TPD results indicated the interaction of dopants with Mn-O bonding and the mobility of oxygen species on the surface of the materials XPS analysis showed that the oxygen vacancies content on the surface of the Ag-Ni co-doped cryptomelane was more significant than the single-doped one With the initial ethanol vapor concentration of about 15000 ppm, the total ethanol conversion ( ) on K-OMS-2, Ag-OMS-2 and Ni-OMS-2 single-doped samples was only 0.2 %, 8.1 % and 5.4 %, respectively, at the reaction temperature of 28 oC Meanwhile, the Ag-Ni-OMS-2 co-doped cryptomelane is superior in the catalytic activity of the complete ethanol oxidation when reaches ~18.6 % under the same investigation conditions Furthermore, when the ethanol vapor concentration was reduced by 2.5 times (~6000 ppm), the ethanol vapor treatment efficiency at 28 oC on Ag-Ni-OMS-2 increased by 3.3 times (61.0 %), indicating a great application potential of this material in the treatment of ethanol vapor and VOCs in general at low temperature iii Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an L IăCAMă OAN Tôi tên Tr n Tr ng Phú, h c viên cao h c chuyên ngành K thu t Hóa h c, MSHV 2070656 t iătr ngă i h căBáchăKhoa,ă i h c Qu c gia Tp H Chí Minh Tơiăxinăcamăđoanănghiênăc u ắBi n tính b m t cryptomelane ho t tính xúc tác x lý VOCs”ălà k t qu c a trình h c t p, nghiên c u khoa h c đ c l p nghiêm túc Các s li u lu năv năđ g cărõărƠng,ăđángătinăc y,ăđ ToƠn b lu năv năđ c thu th p t th c t , có ngu n c x lý trung th c khách quan c th c hi n t i ph̀ng thí nghi m Xúc tác vƠ ph̀ng thí nghi m Hóa LỦ, khoa K Thu t Hóa h c,ătr ngă i h c Bách Khoa Tp HCM Tôi xin ch u trách nhi m v k t qu nghiên c u c a TÁC GI Tr n Tr ng Phú iv Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an M CL C L I C Mă N i TÓM T T LU NăV N ii ABSTRACT iii M C L C v DANH M C HÌNH viii DANH M C B NG ix CH NGă1.ăM U 1.1 Lý ch năđ tài 1.2 M c tiêu c aăđ tài 1.γ.ă CH iăt ng ph m vi nghiêm c u c aăđ tài NGăβ:ăT NGăQUANă TÀI 2.1 T ng quan v VOCs 2.1.1 Khái ni m v VOCs 2.1.2 Ngu n phát th i VOCs .3 2.1.3 Tác h i c a VOCs .4 2.1.4 Ethanol 2.1.5 X lý VOCs b ngăph ngăphápăoxyăhóaăxúcătác .9 2.2 T ng quan v v t li u OMS-2 10 β.β.1.ă căđi m c u trúc tính ch t c a OMS-2 .10 β.β.γ.ăCácăph CH ngăphápăđ nh danh v t li u 14 NGăγ:ăTH C NGHI M 18 3.1 T ng h p v t li u 18 3.2 Kh oăsátăđ cătr ngăv t li u .20 3.3 Kh o sát ph n ngăoxyăhóaăh iăethanol 21 v Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an 3.3.1 Xây d ngăđ ng chu n th hi n m i quan h gi aăđ h p thu n ngăđ ethanolăđưăph n ng 21 3.3.2 Kh o sát ho t tính xúc tác c a v t li u cryptomelane q trình oxy hóaăh iăethanol 23 3.3.2.1 Kh o sát nhăh v t li u OMS-2 ng c a trình pha t păđ n ho t tính xúc tác c a nhi tăđ phịng 26 3.3.2.2 Kh o sát nhăh ng c a n ngăđ h iăethanolăđ n ho t tính xúc tác c a v t li u co-doping OMS-2 26 3.3.2.3 Kh o sát nhăh ng c a th i gian x lỦăđ n ho t tính xúc tác c a v t li u co-doping OMS-2 27 CH NGă4:ăK T QU VÀ BÀN LU N 28 4.1 K t qu đ nh danh v t li u 28 4.1.1 Nhi u x tia X ậ XRD 28 4.1.2 Quang ph Raman 29 4.1.3 nh SEM 30 4.1.4 Thành ph n nguyên t kim lo i Mn-AOS 31 4.1.5.ă ngăđ ng nhi t h p ph ậ gi i h p ph N2 di n tích b m t riêng BET 32 4.1.6 Gi i h p ph O2 theoăch ngătrìnhănhi tăđ ậ O2-TPD 34 4.1.7 Quang ph quangăđi n t tia X ậ XPS .35 4.2 K t qu kh o sát ho t tính xúc tác thơng qua ph n ngăoxyăhóaăh iăethanol 40 4.β.1.ă ng chu n bi u di n m i quan h gi aăđ h p thu n ngăđ ethanol 40 4.2.2 K t qu kh o sát ho t tính xúc tác c a v t li u cryptomelane q trìnhăoxyăhóaăh iăethanol 41 vi Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an 4.2.2.1 Kh o sát nhăh ng c a trình pha t păđ n ho t tính xúc tác t i nhi tăđ phịng 41 4.2.2.2 Kh o sát nhăh ng c a n ngăđ ethanolăđ n ho t tính xúc tác t i nhi tăđ phòng 42 4.2.2.3 Kh o sát nhăh ng c a th i gian ph n ngăđ n ho t tính xúc tác t i nhi tăđ phòng 44 CH NGă5:ăK T LU N VÀ KI N NGH 46 5.1 K t lu n 46 5.2 Ki n ngh 46 TÀI LI U THAM KH O 48 vii Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an 25 0.06 0.05 20 18.6 0.039 0.04 15 13.6 0.029 0.03 10.1 10 0.02 0.01 tăli u) T căđ ăchuy năhóaă(mol C2H5OH / g v ăchuy năhóaăh iăethanolă(%) 0.054 0.00 γ0ăphútăđ u Sauă18ăgi Sauăβ4ăgi Th iăgianăkh oăsát Hình 4.11 nhăh ng c a th i gian x lỦăđ n ho t tính xúc tác i u ki n thí nghi m: v t li u kh o sát g m 0.03 g Ag0.05Ni0.1 0.02 g v n th ch anh;ă l uă l ngă d̀ngă khơngă khí:ă 480ă mL/phút;ă l uă l ngă d̀ngă h iă ethanol:ă β0ă mL/phút; nhi tăđ b u nhi t: 20 oC, thi t b ph n ngăđ ( 30  oC) 45 Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn c gi nhi tăđ phòng C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an CH NG 5: K T LU N VÀ KI N NGH 5.1 K t lu n - K t qu phân tích XRD ph Raman cho th y c u trúc đ cătr ngăc a cryptomelane m u v t li uăđưăt ng h p, ngoƠiăraăc ngăkhôngăxu t hi n pha t p ch t Ag2O, NiO, birnessite pyrolusite nh SEM cho th y m u cryptomelane bi n tính v n gi đ c hình thái d ngănanorodăđ cătr ngăc a OMS-2 - S có m t c aă Agă vƠă Niă lƠmă thayă đ i thành ph n lo i Mnn+ c u trúc cryptomelane, d năđ n s thayăđ i Mn-AOS phân b hƠmăl ng kim lo i v t li u Bên c nhăđó,ădi n tích b m t riêng BET m u pha t p Agăđ thi n so v i cryptomelane khơng bi nătính,ăđ c bi t m uăđ ng pha t p Ag-Ni cc i - K t qu O2-TPD cho th y nhăh ng c aădopantăđ năđ linhăđ ng oxy b m t v t li u, ngồi cịn th hi n rõ t ngătácăc a dopant v i liên k t Mn-O - Phân tích ph XPS ch hƠmăl ng kim lo i b m t v t li u không chênh l ch nhi u so v i toàn b v t li u, bên c nhăđó c ngăxácănh n k t qu Mn-AOS cho th y s c i thi n v hƠmăl ng l tr ng oxy b m t m u co-doped - Khi kh o sát s chuy n hóa h iăethanolătrênăcác m u v t li u th th y m uăđ ng pha t p Ag-Ni v nhi tăđ phịng, có t tr i rõ r t so v i m uăđ năphaăt p không bi n tính, cho th y s hi u qu c a q trình bi n tính b m t cryptomelane 5.2 Ki n ngh V t li uăđ ng pha t p Ag-Ni-OMS-2 đư cho th y ti măn ngă ng d ng x lý h iăethanolănóiăriêngăvƠăVOCsănóiăchungă nhi tăđ th p toàn di n vƠăđánhăgiáăchiăti tăh năv v t li uăvƠăh có nhìn khách quan, ng nghiên c u này, c n phân tích thêm y u t nh : - S n ph m c a q trình x lý c năđ c phân tích đ xácăđ nhăhƠmăl ng CO2 s n ph m ph (n u có) - nhăh ng c a kh iăl ng v t li u, đ m khơng khí, ầ c ngăc năđ sátăđ có đánhăgiáăchiăti tăh năv ho t tính xúc tác c a v t li u 46 Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn c kh o C.33.44.55.54.78.65.5.43.22.2.4 22.Tai lieu Luan 66.55.77.99 van Luan an.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.C.33.44.55.54.78.655.43.22.2.4.55.22 Do an.Tai lieu Luan van Luan an Do an.Tai lieu Luan van Luan an Do an CÔNG TRÌNH KHOA H C T P Tran, X P Ta-Thi, K C Nguyen, D N Tran, T D Nguyen-Phan, K N Pham, G H Nguyen, and T M Tran-Thuy,ăắEnhancedăformaldehyderemovalăoverămodifiedăcryptomelaneăcatalysts,”ăIOP Conference Series: Earth and Environmental Science, Dec 2021, vol 947, no 1, p 012024, doi: 10.1088/1755-1315/947/1/012024 T M Tran-Thuy, N T Nguyen-Thi, T P Tran, N H Tran-Le, M A Dang, Q V Nguyen, and M T Nguyen-Kim,ăắCerium-modified cryptomelane: an antibacterial activity against Pseudomonas aeruginosa,”ă IOP Conference Series: Earth and Environmental Science, Dec 2021, vol 947, no 1, p 012027, doi: 10.1088/1755-1315/947/1/012027 T M Tran-Thuy, T P Le, T P Tran, H H Lam, L Q Nguyen, D V Nguyen, and T Dang-Bao, ắChromium-doped cryptomelane: Mn-O debilitationăandăreactiveăenhancementăinăformaldehydeăabatement,”ăMaterials Letters, vol 305, p 130777, Dec 2021, doi: 10.1016/j.matlet.2021.130777 47 Stt.010.Mssv.BKD002ac.email.ninhd 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van Luan an Do an Stt.010.Mssv.BKD002ac.email.ninhd 77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77.77.99.44.45.67.22.55.77.C.37.99.44.45.67.22.55.77t@edu.gmail.com.vn.bkc19134.hmu.edu.vn.Stt.010.Mssv.BKD002ac.email.ninhddtt@edu.gmail.com.vn.bkc19134.hmu.edu.vn