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Khan Z, Al-Thabaiti SA. Fabrication of chitosan-MnO 2‑iridium/nanoceria supported nanoparticles: Catalytic and anti-radical activities. Int J Biol Macromol 2023; 228:411-425. [PMID: 36566810 DOI: 10.1016/j.ijbiomac.2022.12.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/02/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Chitosan capped MnO2‑iridium nanoparticles supported on nanoceria (Ch-MnO2-Ir/CeO2) were fabricated by using combination of colloidal solution and metal displacement galvanic methods. The oxidative degradation of acid orange 7 in aqueous solution by activated persulfate with the as-prepared nanoparticles was studied. The resulting Ch-MnO2-Ir/CeO2 with S2O82-, 80 % degraded 70.06 mg/L of acid orange 7 within 100 min, while at the same time, Ch-Ir, Ch-MnO2, and Ch-Ir-MnO2 remained inactive. CeO2 increased the surface of the catalyst, and also improved the reactive oxygen species site of Ch-Ir-MnO2 through the activation of S2O82- with CeO2. The reversible redox cycle reaction, Ce (III) ↔ Ce (IV) and strong synergistic effect of MnO2-Ir are responsible for the remarkable catalytic performance of Ch-MnO2-Ir/CeO2/S2O82- system. The degradation of acid orange 7 could be significantly retarded with inorganic (NO3- < Cl- < SO42- < H2PO4- < HCO3-) and organic scavengers (ethanol < tertiary butanol < benzoquinone < phenol). Ch-MnO2-Ir/CeO2 exhibited excellent stability and reusability. Anti-radical activity of chitosan and Ch-MnO2-Ir/CeO2 was evaluated with 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical. The free radical properties increase with concentration of chitosan and Ch-MnO2-Ir/CeO2.
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Affiliation(s)
- Zaheer Khan
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
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Esmaeilzadeh P, Zandi A, Ghazanfari MH, Khezrnejad A, Fatemi M, Molaei Dehkordi A. Selective Fabrication of Robust and Multifunctional Super Nonwetting Surfaces by Diverse Modifications of Zirconia-Ceria Nanocomposites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9195-9209. [PMID: 35867863 DOI: 10.1021/acs.langmuir.2c00909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The creation of surfaces with various super nonwetting properties is an ongoing challenge. We report diverse modifications of novel synthesized zirconia-ceria nanocomposites by different low surface energy agents to fabricate nanofluids capable of regulating surface wettability of mineral substrates to achieve selective superhydrophobic, superoleophobic-superhydrophilic, and superamphiphobic conditions. Surfaces treated with these nanofluids offer self-cleaning properties and effortless rolling-off behavior with sliding angles ≤7° for several liquids with surface tensions between 26 and 72.1 mN/m. The superamphiphobic nanofluid coating imparts nonstick properties to a solid surface whereby liquid drops can be effortlessly displaced on the coating with a near-zero tilt and conveniently lifted off using a needle tip, leaving no trace. Further, the superamphiphobic surface demonstrates good oil repellency toward ultralow surface tension liquids such as n-hexane and n-heptane. The superoleophobic-superhydrophilic surface repels oil droplets well regardless of whether it is in the air or underwater conditions. In addition, reaping the benefits of the ZrO2-CeO2 nanocomposites' photocatalysis feature, the superoleophobic-superhydrophilic coating exhibits self-cleaning ability by the degradation of color dyes. Modification of the wettability of substrates is carried out by a cost-effective and facile solution-immersion approach, which creates surfaces with hierarchical nano-submicron-scaled structures. The multipurpose coated surfaces have outstanding durability and mechanical stability. They also resist well high-temperature-high-pressure conditions, which will provide various practical applications in different fields, including the condensate banking removal in gas reservoirs or the separation of oil/water mixtures.
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Affiliation(s)
- Pouriya Esmaeilzadeh
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11155-9564, Iran
| | - Ahmad Zandi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11155-9564, Iran
| | | | - Ayub Khezrnejad
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11155-9564, Iran
| | - Mobeen Fatemi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11155-9564, Iran
| | - Asghar Molaei Dehkordi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran 11155-9564, Iran
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Naidi SN, Khan F, Harunsani MH, Tan AL, Kim YM, Khan MM. Effect of Zr doping on photoantioxidant and antibiofilm properties of CeO 2 NPs fabricated using aqueous leaf extract of Pometia pinnata. Bioprocess Biosyst Eng 2021; 45:279-295. [PMID: 34727229 DOI: 10.1007/s00449-021-02656-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 10/14/2021] [Indexed: 02/07/2023]
Abstract
Synthesized cerium oxide nanoparticles (S-CeO2 NPs) and 1%, 5% and 10% zirconium doped CeO2 (Zr-doped CeO2) NPs were fabricated using aqueous leaf extract of Pometia pinnata. The synthesized NPs were characterized using standard techniques which confirmed successful synthesis of NPs with particle size ranging from 12 to 23 nm and band gap energy of 2.54-2.66 eV. Photoantioxidant activities showed enhanced activities under visible light irradiation in comparison to the dark condition in the dose-dependent study. Biofilm inhibition studies showed ~ 73% biofilm inhibition of Staphylococcus aureus at 512 µg/mL for S-CeO2, whereas 10% Zr-doped CeO2 NPs showed biofilm inhibition of 52.7%. The bactericidal tests showed killing properties at 1024 µg/mL of S-CeO2 NPs and at 512 µg/mL of 1% Zr-doped CeO2. Reduced bactericidal activities were observed for 5% and 10% Zr-doped CeO2. These studies showed that the fabricated NPs have both good photoantioxidant and antibacterial properties.
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Affiliation(s)
- Siti Najihah Naidi
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Fazlurrahman Khan
- Research Center for Marine Integrated Bionics Technology, Pukyong National University, Busan, 48513, South Korea
| | - Mohammad Hilni Harunsani
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Ai Ling Tan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam
| | - Young-Mog Kim
- Research Center for Marine Integrated Bionics Technology, Pukyong National University, Busan, 48513, South Korea.,Department of Food Science and Technology, Pukyong National University, Busan, 48513, South Korea
| | - Mohammad Mansoob Khan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
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Etim UJ, Bai P, Gazit OM, Zhong Z. Low-Temperature Heterogeneous Oxidation Catalysis and Molecular Oxygen Activation. CATALYSIS REVIEWS 2021. [DOI: 10.1080/01614940.2021.1919044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ubong J. Etim
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
| | - Peng Bai
- College of Chemical Engineering, China University of Petroleum, Qingdao, China
| | - Oz M. Gazit
- Wolfson Faculty of Chemical Engineering, Technion – Israel Institute of Technology, Haifa, Israel
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, China
- Technion Israel Institute of Technology (IIT), Haifa, Israel
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Guerra-Que Z, Cortez-Elizalde J, Pérez-Vidal H, Arévalo-Pérez JC, Silahua-Pavón AA, Córdova-Pérez GE, Cuauhtémoc-López I, Martínez-García H, González-Díaz A, Torres-Torres JG. Bimetallic M-Cu (M = Ag, Au, Ni) Nanoparticles Supported on γAl 2O 3-CeO 2 Synthesized by a Redox Method Applied in Wet Oxidation of Phenol in Aqueous Solution and Petroleum Refinery Wastewater. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2570. [PMID: 34685011 PMCID: PMC8541079 DOI: 10.3390/nano11102570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 11/30/2022]
Abstract
Three bimetallic catalysts of the type M-Cu with M = Ag, Au and Ni supports were successfully prepared by a two-step synthesized method using Cu/Al2O3-CeO2 as the base monometallic catalyst. The nanocatalysts were characterized using X-ray diffraction (XRD), temperature-programmed reduction of H2 (H2-TPR), N2 adsorption-desorption, scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and ultraviolet-visible spectroscopy with diffuse reflectance (DR-UV-Vis) techniques. This synthesized methodology allowed a close interaction between two metals on the support surface; therefore, it could have synthesized an efficient transition-noble mixture bimetallic nanostructure. Alloy formation through bimetallic nanoparticles (BNPs) of AgCuAlCe and AuCuAlCe was demonstrated by DR-UV-Vis, EDS, TEM and H2-TPR. Furthermore, in the case of AgCuAlCe and AuCuAlCe, improvements were observed in their reducibility, in contrast to NiCuAlCe. The addition of a noble metal over the monometallic copper-based catalyst drastically improved the phenol mineralization. The higher activity and selectivity to CO2 of the bimetallic gold-copper- and silver-copper-supported catalysts can be attributed to the alloy compound formation and the synergetic effect of the M-Cu interaction. Petroleum Refinery Wastewater (PRW) had a complex composition that affected the applied single CWAO treatment, rendering it inefficient.
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Affiliation(s)
- Zenaida Guerra-Que
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
- Laboratorio de Investigación 1 Área de Nanotecnología, Tecnológico Nacional de México Campus Villahermosa, Km. 3.5 Carretera Villahermosa–Frontera, Cd. Industrial, C.P., Villahermosa 86010, Tabasco, Mexico
| | - Jorge Cortez-Elizalde
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Hermicenda Pérez-Vidal
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Juan C. Arévalo-Pérez
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Adib A. Silahua-Pavón
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Gerardo E. Córdova-Pérez
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Ignacio Cuauhtémoc-López
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Héctor Martínez-García
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
| | - Anabel González-Díaz
- Laboratorio de Análisis y Caracterización, Universidad Juárez Autónoma de Tabasco, DAIA, Km. 1 Carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico;
| | - José Gilberto Torres-Torres
- Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Universidad Juárez Autónoma de Tabasco, Km. 1 carretera Cunduacán-Jalpa de Méndez, C.P., Cunduacán 86690, Tabasco, Mexico; (J.C.-E.); (H.P.-V.); (J.C.A.-P.); (A.A.S.-P.); (G.E.C.-P.); (I.C.-L.); (H.M.-G.)
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Cortez-Elizalde J, Cuauhtémoc-López I, Guerra-Que Z, Espinosa de los Monteros AE, Lunagómez-Rocha MA, Silahua-Pavón AA, Arévalo-Pérez JC, Cordero-García A, Cervantes-Uribe A, Torres-Torres JG. Chemical and Structural Changes by Gold Addition Using Recharge Method in NiW/Al 2O 3-CeO 2-TiO 2 Nanomaterials. MATERIALS (BASEL, SWITZERLAND) 2021; 14:5470. [PMID: 34639867 PMCID: PMC8509746 DOI: 10.3390/ma14195470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/11/2021] [Accepted: 09/15/2021] [Indexed: 11/24/2022]
Abstract
NiWAu trimetallic nanoparticles (NPs) on the surface of support Al2O3-CeO2-TiO2 were synthesized by a three-step synthetic method in which Au NPs were incorporated into presynthesized NiW/Al2O3-CeO2-TiO2. The recharge method, also known as the redox method, was used to add 2.5 wt% gold. The Al2O3-CeO2-TiO2 support was made by a sol-gel method with two different compositions, and then two metals were simultaneously loaded (5 wt% nickel and 2.5 wt% tungsten) by two different methods, incipient wet impregnation and ultrasound impregnation method. In this paper, we study the effect of Au addition using the recharge method on NiW nanomaterials supported on mixed oxides on the physicochemical properties of synthesized nanomaterials. The prepared nanomaterials were characterized by scanning electron microscopy, BET specific surface area, X-ray diffraction, diffuse reflectance spectroscopy in the UV-visible range and temperature-programmed desorption of hydrogen. The experimental results showed that after loading of gold, the dispersion was higher (46% and 50%) with the trimetallic nanomaterials synthesized by incipient wet impregnation plus recharge method than with impregnation plus ultrasound recharge method, indicating a greater number of active trimetallic (NiWAu) sites in these materials. Small-sized Au from NiWAu/ACTU1 trimetallic nanostructures was enlarged for NiWAu/ACT1. The strong metal NPs-support interaction shown for the formation of NiAl2O4, Ni-W-O and Ni-Au-O species simultaneously present in the surface of trimetallic nanomaterial probably plays an important role in the degree of dispersion of the gold active phase.
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Affiliation(s)
- Jorge Cortez-Elizalde
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Ignacio Cuauhtémoc-López
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Zenaida Guerra-Que
- Laboratorio de Investigación 1 Área de Nano-Tecnología, Tecnológico Nacional de México Campus Villahermosa, Km. 3.5 Carretera Villahermosa–Frontera, Cd. Industrial, Villahermosa 86010, Tabasco, Mexico;
| | - Alejandra Elvira Espinosa de los Monteros
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Ma. Antonia Lunagómez-Rocha
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adib Abiu Silahua-Pavón
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Juan Carlos Arévalo-Pérez
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adrián Cordero-García
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - Adrián Cervantes-Uribe
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
| | - José Gilberto Torres-Torres
- Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuen-tes de Energía y Remediación Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), Universidad Juárez Autónoma de Tabasco, DACB, Km.1 Carretera Cunduacán-Jalpa de Méndez, Cun-duacán 86690, Tabasco, Mexico; (J.C.-E.); (I.C.-L.); (A.E.E.d.l.M.); (M.A.L.-R.); (A.A.S.-P.); (J.C.A.-P.); (A.C.-G.); (A.C.-U.)
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A Review on Silver Nanoparticles: Classification, Various Methods of Synthesis, and Their Potential Roles in Biomedical Applications and Water Treatment. WATER 2021. [DOI: 10.3390/w13162216] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Recent developments in nanoscience have appreciably modified how diseases are prevented, diagnosed, and treated. Metal nanoparticles, specifically silver nanoparticles (AgNPs), are widely used in bioscience. From time to time, various synthetic methods for the synthesis of AgNPs are reported, i.e., physical, chemical, and photochemical ones. However, among these, most are expensive and not eco-friendly. The physicochemical parameters such as temperature, use of a dispersing agent, surfactant, and others greatly influence the quality and quantity of the synthesized NPs and ultimately affect the material’s properties. Scientists worldwide are trying to synthesize NPs and are devising methods that are easy to apply, eco-friendly, and economical. Among such strategies is the biogenic method, where plants are used as the source of reducing and capping agents. In this review, we intend to debate different strategies of AgNP synthesis. Although, different preparation strategies are in use to synthesize AgNPs such as electron irradiation, optical device ablation, chemical reduction, organic procedures, and photochemical methods. However, biogenic processes are preferably used, as they are environment-friendly and economical. The review covers a comprehensive discussion on the biological activities of AgNPs, such as antimicrobial, anticancer anti-inflammatory, and anti-angiogenic potentials of AgNPs. The use of AgNPs in water treatment and disinfection has also been discussed in detail.
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Naidi SN, Khan F, Tan AL, Harunsani MH, Kim YM, Khan MM. Green synthesis of CeO 2 and Zr/Sn-dual doped CeO 2 nanoparticles with photoantioxidant and antibiofilm activities. Biomater Sci 2021; 9:4854-4869. [PMID: 33908451 DOI: 10.1039/d1bm00298h] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Cerium oxide (CeO2) and 1%, 5% and 10% zirconium/tin-dual doped CeO2 nanoparticles (Zr/Sn-dual doped CeO2 NPs) were synthesized using an aqueous leaf extract of Pometia pinnata. By using UV-visible diffuse reflectance spectroscopy, the band gap energies of these materials were found to be in the range of ∼2.49 to 2.66 eV. The average crystallite sizes of the fluorite phase obtained from X-ray diffraction were between 7 and 16 nm. X-ray photoelectron spectroscopy (XPS) analysis further confirmed the synthesis of CeO2 and Sn-doped CeO2 NPs. Almost spherical shapes of the nanomaterials with an average particle size of 12-17 nm were determined using scanning electron microscopy and transmission electron microscopy studies. Photoantioxidant activities of the synthesized materials showed enhanced photoantioxidant response under visible light irradiation in comparison with those under dark conditions in both dose- and time-dependent manner. The CeO2 NPs exhibited a significant concentration-dependent antibiofilm activity against the Gram-positive bacteria Staphylococcus aureus (S. aureus) and Listeria monocytogenes (L. monocytogenes). Only the 10% Zr/Sn-dual doped-CeO2 NPs were found to inhibit S. aureus biofilm formation at higher concentrations. All Zr/Sn-dual doped CeO2 NPs exhibited a concentration-dependent biofilm inhibition of L. monocytogenes and also bactericidal activity towards S. aureus. These nanomaterials exhibited enhanced photoantioxidant activities and antibacterial properties, which make them suitable for various biological applications.
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Affiliation(s)
- Siti Najihah Naidi
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
| | - Fazlurrahman Khan
- Institute of Food Science, Pukyong National University, Busan 48513, South Korea
| | - Ai Ling Tan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
| | - Mohammad Hilni Harunsani
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
| | - Young-Mog Kim
- Institute of Food Science, Pukyong National University, Busan 48513, South Korea and Department of Food Science and Technology, Pukyong National University, Busan 48513, South Korea
| | - Mohammad Mansoob Khan
- Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam.
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9
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New MoO3-CeO2-ZrO2 and WO3-CeO2-ZrO2 nanostructured mesoporous aerogel catalysts for the NH3-SCR of NO from diesel engine exhaust. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.12.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Naidi SN, Khan F, Tan AL, Harunsani MH, Kim YM, Khan MM. Photoantioxidant and antibiofilm studies of green synthesized Sn-doped CeO2 nanoparticles using aqueous leaf extracts of Pometia pinnata. NEW J CHEM 2021. [DOI: 10.1039/d1nj00416f] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CeO2 and Sn-doped CeO2 NPs synthesized using aqueous leaf extracts of Pometia pinnata and their photoantioxidant and antibiofilm applications.
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Affiliation(s)
- Siti Najihah Naidi
- Chemical Sciences
- Faculty of Science
- Universiti Brunei Darussalam
- Jalan Tungku Link
- Gadong
| | - Fazlurrahman Khan
- Institute of Food Science
- Pukyong National University
- Busan 48513
- South Korea
| | - Ai Ling Tan
- Chemical Sciences
- Faculty of Science
- Universiti Brunei Darussalam
- Jalan Tungku Link
- Gadong
| | | | - Young-Mog Kim
- Institute of Food Science
- Pukyong National University
- Busan 48513
- South Korea
- Department of Food Science and Technology
| | - Mohammad Mansoob Khan
- Chemical Sciences
- Faculty of Science
- Universiti Brunei Darussalam
- Jalan Tungku Link
- Gadong
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11
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12
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Silahua-Pavón AA, Torres-Torres G, Arévalo-Pérez JC, Cervantes-Uribe A, Guerra-Que Z, Cordero-García A, Espinosa de Los Monteros A, Beltramini JN. Effect of gold addition by the recharge method on silver supported catalysts in the catalytic wet air oxidation (CWAO) of phenol. RSC Adv 2019; 9:11123-11134. [PMID: 35520247 PMCID: PMC9063395 DOI: 10.1039/c9ra00540d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/01/2019] [Indexed: 11/21/2022] Open
Abstract
Catalysts Ag/ZrO2–CeO2 and Au/ZrO2–CeO2 were synthesized by a deposition–precipitation method and Ag–Au/ZrO2–CeO2 was prepared using a recharge method for the second metal (Au). The materials were characterized by physisorption of N2, XRD, ICP, UV-vis RDS, H2-TPR, XPS and TEM. The results obtained show that the specific areas for monometallic materials were 29–37 m2 g−1 and 27–74 m2 g−1 for bimetallics. The tetragonal crystal phase of ZrO2 stabilizes when CeO2 quantity increases. Using XPS an increment in Ce3+ species abundance was determined for bimetallic catalysts in contrast to the monometallic ones; according to the Ag 3d region, this metal oxidation was observed when augmenting the content of CeO2 in the materials, and with Au the opposite effect was produced. It was determined by TEM, that the average size of the metallic particles was smaller at bimetallic catalysts due the preparation method. Catalytic activity was evaluated by CWAO of phenol, the Ag–Au/ZrO2–CeO2 catalyst with 20% wt of cerium reached a degradation of 100% within an hour, being the most active catalyst. Maleic, formic and oxalic acid were identified as reaction intermediates; and at the end of the reaction acetic acid was identified as the main by-product, because it is the most refractory and the conditions for oxidation must be more severe. Addition of gold changed the properties of silver monometallic catalysts by inhibiting the low formation of intermediates and changed of reaction route by formic acid to CO2 and water. Furthermore, the bimetallic catalyst showed in the reuse cycles the better stability in CWAO of phenol.![]()
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Affiliation(s)
- Adib A Silahua-Pavón
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Gilberto Torres-Torres
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Juan Carlos Arévalo-Pérez
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Adrián Cervantes-Uribe
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Zenaida Guerra-Que
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300.,Instituto Tecnológico de Villahermosa Km. 3.5 Carretera, Villahermosa - Frontera, Cd. Industrial 86010 Villahermosa Tabasco Mexico
| | - Adrián Cordero-García
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Alejandra Espinosa de Los Monteros
- Universidad Juárez Autónoma de Tabasco, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energìa y de Remediaciòn Ambiental, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB Km. 1 Carretera Cunduacán-Jalpa de Méndez AP. 24, C.P. 86690, Cunduacán Tabasco Mexico +52 19143360928 +52 19143360300
| | - Jorge N Beltramini
- ARC Centre of Excellence for Functional Nanomaterials, The Australian Institute for Bioengineering and Nanotechnology (AIBN) and School of Engineering, The University of Queensland St. Lucia QLD 4072 Australia
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Guerra-Que Z, Pérez-Vidal H, Torres-Torres G, Arévalo-Pérez JC, Silahua Pavón AA, Cervantes-Uribe A, Espinosa de los Monteros A, Lunagómez-Rocha MA. Treatment of phenol by catalytic wet air oxidation: a comparative study of copper and nickel supported on γ-alumina, ceria and γ-alumina–ceria. RSC Adv 2019; 9:8463-8479. [PMID: 35547604 PMCID: PMC9087632 DOI: 10.1039/c9ra00509a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/05/2019] [Indexed: 12/20/2022] Open
Abstract
Cu, Ni, CuO and NiO catalysts, prepared by wet impregnation with urea and supported on γ-Al2O3, CeO2, and Al2O3–CeO2, were evaluated for Catalytic Wet Air Oxidation (CWAO) of phenol in a batch reactor under a milder condition (120 °C and 10 bar O2). The synthesized samples, at their calcined and/or their reduced form, were characterized by XRD, H2-TPR, N2 adsorption–desorption, SEM-EDS and DR-UV-Vis to explain the differences observed in their catalytic activity towards the studied reaction. The influence of the support on the efficiency of CWAO of phenol at 120 °C and 10 bar of pure oxygen has been examined and compared over nickel and copper species. The SEM-EDS results reveal that the spherical crystalline Cu and Ni were successfully deposited on the surface of γ-Al2O3, CeO2, Al2O3–CeO2 within 16–90 nm and that they were highly homogeneously dispersed. It was found that catalysts prepared from impregnation solutions of Cu(NO3)2·3H2O and Ni(NO3)2·6H2O with urea addition had different textural characteristics and degrees of dispersion of Cu and Ni species. The urea addition in the traditional wet impregnation method was essential to improve the reducibility and degree of dispersion in Ni, and to a lesser extent, in Cu. According to the characterization analysis of H2-TPR and UV-VIS RD a structure–activity relationship can be determined. The chemical oxygen demand (COD) and GC analyses confirmed the effect of calcined and reduced species for Cu and Ni applied to the catalytic oxidation of phenol, showing their significant impact in the final performance of the catalyst. Influence of the calcination and reduction treatment effects used to activate catalysts on the global catalytic performance on phenol oxidation over different supports.![]()
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Affiliation(s)
- Zenaida Guerra-Que
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - Hermicenda Pérez-Vidal
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - G. Torres-Torres
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - Juan Carlos Arévalo-Pérez
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - Adib Abiu Silahua Pavón
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - Adrian Cervantes-Uribe
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - A. Espinosa de los Monteros
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
| | - Ma. Antonia Lunagómez-Rocha
- Laboratory of Catalytic Nanomaterials Applied to the Development of Energy Sources and Environmental Remediation
- Applied Science and Technology Research Center of Tabasco (CICTAT)
- Juarez Autonomous University of Tabasco
- DACB
- Cunduacan
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14
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Singuru R, Lee J, Dhanalaxmi K, Reddy BM, An K, Mondal J. Design of Efficient Noble Metal Free Copper-Promoted Nickel-Ceria-Zirconia Nanocatalyst for Bio-Fuel Upgrading. ChemistrySelect 2018. [DOI: 10.1002/slct.201800896] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ramana Singuru
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad 500007 India
- AcSIR - Indian Institute of Chemical Technology; Hyderabad-500 007 India
| | - Jihyeon Lee
- School of Energy & Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798, Korea
| | - Karnekanti Dhanalaxmi
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad 500007 India
- AcSIR - Indian Institute of Chemical Technology; Hyderabad-500 007 India
| | - Benjaram M. Reddy
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad 500007 India
- AcSIR - Indian Institute of Chemical Technology; Hyderabad-500 007 India
| | - Kwangjin An
- School of Energy & Chemical Engineering; Ulsan National Institute of Science and Technology (UNIST); Ulsan 689-798, Korea
| | - John Mondal
- Inorganic and Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology; Uppal Road Hyderabad 500007 India
- AcSIR - Indian Institute of Chemical Technology; Hyderabad-500 007 India
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15
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Pleşa Chicinaş R, Gál E, Bedelean H, Darabantu M, Măicăneanu A. Novel metal modified diatomite, zeolite and carbon xerogel catalysts for mild conditions wet air oxidation of phenol: Characterization, efficiency and reaction pathway. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.12.050] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Zhang Y, Zhou Y, Wang Q, Shi J, Peng C, He L, Shi L. Manipulating catalytic activity and durability of Pt-modified Cu–Fe–La/γ-Al 2O 3 ternary catalyst for catalytic wet air oxidation: effect of calcination temperature. RSC Adv 2018. [DOI: 10.1039/c7ra11899f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel Pt-modified Cu–Fe–La/γ-Al2O3 catalysts were prepared by an incipient-wetness impregnation method, and their performances were evaluated in catalytic wet air oxidation (CWAO) of printing and dyeing wastewater (PDW).
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Affiliation(s)
- Yongli Zhang
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Yanbo Zhou
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Qingyu Wang
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Junjun Shi
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Chao Peng
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Lingfeng He
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
| | - Liang Shi
- School of Environment and Chemical Engineering
- Foshan University
- Foshan
- China
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17
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Pisarek M, Krajczewski J, Wierzbicka E, Hołdyński M, Sulka GD, Nowakowski R, Kudelski A, Janik-Czachor M. Influence of the silver deposition method on the activity of platforms for chemometric surface-enhanced Raman scattering measurements: Silver films on ZrO 2 nanopore arrays. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 182:124-129. [PMID: 28411421 DOI: 10.1016/j.saa.2017.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/05/2017] [Accepted: 04/08/2017] [Indexed: 06/07/2023]
Abstract
Deposition of plazmonic metal nanoparticles on nanostructured oxide templates is an important part in preparation and design of suitable substrates for surface-enhanced Raman scattering (SERS) measurements. In this contribution we analyze the influence of the Ag deposition methods (magnetron sputtering and evaporation in vacuum, which are often used interchangeably) on SERS activity of the resultant Ag-n/ZrO2/Zr composite samples fabricated. We found that deposition of the same amount of Ag (0.020mg/cm2) on the ZrO2 nanoporous layers using magnetron sputtering and evaporation in vacuum leads to formation of two different surface morphologies, which can be distinguished on the basis of high-resolution scanning electron microscopy (HR-SEM) measurements. Those differences distinctly affect SERS intensity measured for probe molecules: pyridine and sodium 2-mercaptoethanesulfonate. SERS substrates obtained using evaporation technique are ca. 1.5 times more efficient than substrates prepared using magnetron sputtering.
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Affiliation(s)
- Marcin Pisarek
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Jan Krajczewski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Ewa Wierzbicka
- Department of Physical Chemistry & Electrochemistry, Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - Marcin Hołdyński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Grzegorz D Sulka
- Department of Physical Chemistry & Electrochemistry, Faculty of Chemistry, Jagiellonian University in Krakow, Ingardena 3, 30-060 Krakow, Poland
| | - Robert Nowakowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Andrzej Kudelski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
| | - Maria Janik-Czachor
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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18
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Bandara WRN, de Silva RM, de Silva KMN, Dahanayake D, Gunasekara S, Thanabalasingam K. Is nano ZrO2 a better photocatalyst than nano TiO2 for degradation of plastics? RSC Adv 2017. [DOI: 10.1039/c7ra08324f] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The environmental accumulation of plastic is a huge problem due to its low degradability.
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Affiliation(s)
| | - Rohini M. de Silva
- Department of Chemistry
- Faculty of Science
- University of Colombo
- Colombo 03
- Sri Lanka
| | - K. M. Nalin de Silva
- Department of Chemistry
- Faculty of Science
- University of Colombo
- Colombo 03
- Sri Lanka
| | - Damayanthi Dahanayake
- Sri Lanka Institute of Nanotechnology (SLINTEC)
- Nanotechnology and Science Park
- Homagama
- Sri Lanka
| | - Sunanda Gunasekara
- Sri Lanka Institute of Nanotechnology (SLINTEC)
- Nanotechnology and Science Park
- Homagama
- Sri Lanka
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