1
|
Valizadeh S, Valizadeh B, Khani Y, Jae J, Hyun Ko C, Park YK. Production of biodiesel via esterification of coffee waste-derived bio-oil using sulfonated catalysts. BIORESOURCE TECHNOLOGY 2024; 404:130908. [PMID: 38821422 DOI: 10.1016/j.biortech.2024.130908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 05/27/2024] [Accepted: 05/27/2024] [Indexed: 06/02/2024]
Abstract
Catalytic esterification of acid-rich coffee waste-derived bio-oil was performed using sulfonated metal oxide catalysts (Al2O3, MgO, ZrO2, and TiO2) and ethanol to produce fatty acid alkyl esters. The potential of the sulfonated catalysts for esterification decreased in the following order: Ti-SO4 > Zr-SO4 > Al-SO4 > Mg-SO4. Particularly, Ti-SO4 and Zr-SO4 resulted in 91.2 % (peak area %) and 85.2 % esters, respectively. This is attributed to the contributions of well-dispersed Brønsted acid sites created by -SO3H functional groups, additional Lewis acid sites formed by Ti and Zr oxides, and their appropriate pore size. Compared with HCl and H3PO4, the use of H2SO4 for TiO2 treatment significantly enhanced ester formation. When using Ti-SO4, increasing the catalyst-to-feedstock ratio (1/2 ∼ 1/10) significantly increased the esters' selectivity (38.7 %∼94.7 %). Ethanol utilization caused a superior selectivity for esters than methanol, while the increasing temperature favored ester production. This study proposes an eco-friendly and practical method for biodiesel generation.
Collapse
Affiliation(s)
- Soheil Valizadeh
- School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
| | - Behzad Valizadeh
- School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
| | - Yasin Khani
- School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
| | - Jungho Jae
- School of Chemical Engineering, Pusan National University, Busan 46241, Korea
| | - Chang Hyun Ko
- School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Korea.
| |
Collapse
|
2
|
Eco-Friendly Preparation of Silver Nanoparticles and Their Antiproliferative and Apoptosis-Inducing Ability against Lung Cancer. LIFE (BASEL, SWITZERLAND) 2022; 12:life12122123. [PMID: 36556488 PMCID: PMC9782107 DOI: 10.3390/life12122123] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
In the present study, the anti-proliferative and apoptotic potential of Tabebuia roseo-alba in lung cancer was assessed. Silver nanoparticles (AgNPs) of T. roseo-alba were synthesized using an ethanolic extract and characterized by adopting various parameters. Herein, the eco-friendly, cost-effective, and green synthesis of AgNPs was evaluated using an ethanolic extract of T. roseo-alba. The as-synthesized AgNPs were then characterized using various characterization techniques, such as UV-visible spectroscopy (UV-vis), X-ray powder diffraction (XRD), dynamic light scattering (DLS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The AgNPs are crystalline, spherical, and highly stable AgNPs of varying sizes in the range of 5-20 nm. The anticancer activity of the ethanolic extract of T. roseo-alba and its AgNPs was determined using an MTT assay. The results indicated that, although both samples showed prominent anti-proliferative activity on lung cancer cell lines, the AgNPs of T. roseo-alba were found to be more potent than the ethanolic extract. Further, apoptosis induction ability was evaluated by FITC Annexin V and PI staining, the results of which demonstrated the efficiency of the ethanolic extract of T. roseo-alba and its AgNPs in causing oxidative stress and subsequent cellular death. This was subsequently further confirmed by measuring the mitochondrial membrane potential after staining the cells with JC1. The apoptotic mode of cell death was further confirmed by DNA fragmentation and caspase assays using Western blot analysis.
Collapse
|
3
|
Trusova EA, Titov DD, Afzal AM, Abramchuk SS. Influence of Graphene Sheets on Compaction and Sintering Properties of Nano-Zirconia Ceramics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7342. [PMID: 36295413 PMCID: PMC9611474 DOI: 10.3390/ma15207342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/30/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
The use of a nanostructured graphene-zirconia composite will allow the development of new materials with improved performance properties and a high functionality. This work covers a stepwise study related to the creation of a nanostructured composite based on ZrO2 and graphene. A composite was prepared using two suspensions: nano-zirconia obtained by sol-gel synthesis and oxygen-free graphene obtained sonochemically. The morphology of oxygen-free graphene sheets, phase composition and the morphology of a zirconia powder, and the morphology of the synthesized composite were studied. The effect of the graphene sheets on the rheological and sintering properties of a nanostructured zirconia-based composite powder has been studied. It has been found that graphene sheets in a hybrid nanostructure make it difficult to press at the elastic deformation stage, and the composite passes into the plastic region at a lower pressure than a single nano-zirconia. A sintering mechanism was proposed for a composite with a graphene content of 0.635 wt%, in which graphene is an important factor affecting the process mechanism. It has been determined that the activation energy of the composite sintering is more than two times higher than for a single nano-zirconia. Apparently, due to the van der Waals interaction, the graphene sheets partially stabilize the zirconia and prevent the disordering of the surface monolayers of its nanocrystals and premelting prior to the sintering. This leads to an increase in the activation energy of the composite sintering, and its sintering occurs, according to a mixed mechanism, in which the grain boundary diffusion predominates, in contrast to the single nano-zirconia sintering, which occurs through a viscous flow.
Collapse
Affiliation(s)
- Elena A. Trusova
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49 Leninsky pr., 119334 Moscow, Russia
| | - Dmitrii D. Titov
- Ceramic Materials Engineering, University of Bayreuth, Ludwig-Thima-Ste. 36b, 95447 Bayreuth, Germany
| | - Asya M. Afzal
- Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 49 Leninsky pr., 119334 Moscow, Russia
| | - Sergey S. Abramchuk
- Faculty of chemistry, Lomonosov Moscow State University, GSP-1, Leninskie Gory, 119991 Moscow, Russia
| |
Collapse
|
4
|
|
5
|
Abd El-Aal M, Mogharbel RT, Ibrahim A, Almutlaq N, Sh Zoromba M, Al-Hossainy AF, Ibrahim SM. Synthesis, characterization, and photosensitizer applications for dye-based on ZrO2- acriflavine nanocomposite thin film [ZrO2+ACF]C. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131827] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
6
|
Grządka E, Matusiak J, Godek E, Maciołek U. Mixtures of cationic guar gum and anionic surfactants as stabilizers of zirconia suspensions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
7
|
Patil KN, Prasad D, Bhanushali JT, Kakade B, Jadhav AH, Nagaraja BM. Chemoselective hydrogenation of cinnamaldehyde over a tailored oxygen-vacancy-rich Pd@ZrO2 catalyst. NEW J CHEM 2021. [DOI: 10.1039/d0nj05595f] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde is captivating due to its industrial relevance.
Collapse
Affiliation(s)
- Komal N. Patil
- Centre for Nano and Material Science (CNMS)
- JAIN (Deemed-to-be University)
- Bangalore-562112
- India
| | - Divya Prasad
- Centre for Nano and Material Science (CNMS)
- JAIN (Deemed-to-be University)
- Bangalore-562112
- India
| | - Jayesh T. Bhanushali
- Centre for Nano and Material Science (CNMS)
- JAIN (Deemed-to-be University)
- Bangalore-562112
- India
| | - Bhalchandra Kakade
- Department of Chemistry
- SRM Research Institute
- SRM Institute of Science and Technology
- Chennai
- India
| | - Arvind H. Jadhav
- Centre for Nano and Material Science (CNMS)
- JAIN (Deemed-to-be University)
- Bangalore-562112
- India
| | - Bhari Mallanna Nagaraja
- Centre for Nano and Material Science (CNMS)
- JAIN (Deemed-to-be University)
- Bangalore-562112
- India
| |
Collapse
|
8
|
Mao X, Xiao W, Wan Y, Li Z, Luo D, Yang H. Dispersive solid-phase extraction using microporous metal-organic framework UiO-66: Improving the matrix compounds removal for assaying pesticide residues in organic and conventional vegetables. Food Chem 2020; 345:128807. [PMID: 33310261 DOI: 10.1016/j.foodchem.2020.128807] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 11/19/2020] [Accepted: 11/30/2020] [Indexed: 02/07/2023]
Abstract
An efficient dispersive solid-phase extraction method was developed to trace pesticide residues in commonly consumed vegetables. In this method, UiO-66 with uniform micropores was used as sorbent, and gas chromatography-mass spectrometry was applied to detect the pesticides. Thanks to the size sieving action of uniform micropores, UiO-66 directly extracted the target pesticides from vegetable matrices and excluded the relatively large matrix compounds. This well eliminated the matrix effect. The important experimental conditions were evaluated by orthogonal array experimental design. In optimized conditions, good linearity (R2 ≥ 0.99), detection limits (0.4-2.0 ng/g), recoveries (60.9-117.5%) and precision (relativestandarddeviations < 14.6%) were achieved. Moreover, the sorbent UiO-66 can be reused more than 20 times. These demonstrate a simple, reliable and robust method to screen the pesticide residues in vegetables. Furthermore, the validated method was applied to detect the pesticides in various organic and conventional vegetables.
Collapse
Affiliation(s)
- Xuejin Mao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China
| | - Weiming Xiao
- Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Yiqun Wan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China.
| | - Zhanming Li
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore
| | - Dongmei Luo
- College of Chemistry and Chemical Engineering, Chifeng University, Chifeng 024000, China
| | - Hongshun Yang
- Department of Food Science and Technology, National University of Singapore, Singapore 117542, Singapore.
| |
Collapse
|
9
|
Choi J, Kim S. Improved Stability and Controllability in ZrN-Based Resistive Memory Device by Inserting TiO 2 Layer. MICROMACHINES 2020; 11:E905. [PMID: 33003640 PMCID: PMC7600328 DOI: 10.3390/mi11100905] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/26/2020] [Accepted: 09/28/2020] [Indexed: 11/16/2022]
Abstract
In this work, the enhanced resistive switching of ZrN-based resistive switching memory is demonstrated by embedding TiO2 layer between Ag top electrode and ZrN switching layer. The Ag/ZrN/n-Si device exhibits unstable resistive switching as a result of the uncontrollable Ag migration. Both unipolar and bipolar resistive switching with high RESET current were observed. Negative-SET behavior in the Ag/ZrN/n-Si device makes set-stuck, causing permanent resistive switching failure. On the other hand, the analogue switching in the Ag/TiO2/ZrN/n-Si device, which could be adopted for the multi-bit data storage applications, is obtained. The gradual switching in Ag/TiO2/ZrN/n-Si device is achieved, possibly due to the suppressed Ag diffusion caused by TiO2 inserting layer. The current-voltage (I-V) switching characteristics of Ag/ZrN/n-Si and Ag/TiO2/ZrN/n-Si devices can be well verified by pulse transient. Finally, we established that the Ag/TiO2/ZrN/n-Si device is suitable for neuromorphic application through a comparison study of conductance update. This paper paves the way for neuromorphic application in nitride-based memristor devices.
Collapse
Affiliation(s)
| | - Sungjun Kim
- Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Korea;
| |
Collapse
|
10
|
Khan M, Shaik MR, Khan S, Adil SF, Kuniyil M, Khan M, Al-Warthan AA, Siddiqui MRH, Nawaz Tahir M. Enhanced Antimicrobial Activity of Biofunctionalized Zirconia Nanoparticles. ACS OMEGA 2020; 5:1987-1996. [PMID: 32039336 PMCID: PMC7003502 DOI: 10.1021/acsomega.9b03840] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 01/13/2020] [Indexed: 05/03/2023]
Abstract
The effective interactions of nanomaterials with biological constituents play a significant role in enhancing their biomedicinal properties. These interactions can be efficiently enhanced by altering the surface properties of nanomaterials. In this study, we demonstrate the method of altering the surface properties of ZrO2 nanoparticles (NPs) to enhance their antimicrobial properties. To do this, the surfaces of the ZrO2 NPs prepared using a solvothermal method is functionalized with glutamic acid, which is an α-amino acid containing both COO- and NH4 + ions. The binding of glutamic acid (GA) on the surface of ZrO2 was confirmed by UV-visible and Fourier transform infrared spectroscopies, whereas the phase and morphology of resulting GA-functionalized ZrO2 (GA-ZrO2) was identified by X-ray diffraction and transmission electron microscopy. GA stabilization has altered the surface charges of the ZrO2, which enhanced the dispersion qualities of NPs in aqueous media. The as-prepared GA-ZrO2 NPs were evaluated for their antibacterial properties toward four strains of oral bacteria, namely, Rothia mucilaginosa, Rothia dentocariosa, Streptococcus mitis, and Streptococcus mutans. GA-ZrO2 exhibited increased antimicrobial activities compared with pristine ZrO2. This improved activity can be attributed to the alteration of surface charges of ZrO2 with GA. Consequently, the dispersion properties of GA-ZrO2 in the aqueous solution have increased considerably, which may have enhanced the interactions between the nanomaterial and bacteria.
Collapse
Affiliation(s)
- Mujeeb Khan
- Department
of Chemistry, College of Science, King Saud
University, P.O. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Mohammed Rafi Shaik
- Department
of Chemistry, College of Science, King Saud
University, P.O. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Shams
Tabrez Khan
- Department
of Agricultural Microbiology, Faculty of Agriculture, Aligarh Muslim University, Aligarh, Uttar Pradesh 202002, India
| | - Syed Farooq Adil
- Department
of Chemistry, College of Science, King Saud
University, P.O. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Mufsir Kuniyil
- Department
of Chemistry, Koneru Lakshmaiah Education
Foundation, Vaddeswaram, Guntur, Andhra Pradesh 522502, India
| | - Majad Khan
- Chemistry
Department, King Fahd University of Petroleum
& Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| | - Abdulrahman A. Al-Warthan
- Department
of Chemistry, College of Science, King Saud
University, P.O. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Mohammed Rafiq H. Siddiqui
- Department
of Chemistry, College of Science, King Saud
University, P.O. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Muhammad Nawaz Tahir
- Chemistry
Department, King Fahd University of Petroleum
& Minerals, Dhahran 31261, Kingdom of Saudi Arabia
| |
Collapse
|
11
|
Trusova EA, Titov DD, Kirichenko AN, Shelekhov EV, Trutnev NS, Afzal AM, Perezhogin IA. The phase composition, morphology and compressibility of graphene-zirconia composite nanostructured powder. NANOSCALE ADVANCES 2020; 2:182-189. [PMID: 36134010 PMCID: PMC9417050 DOI: 10.1039/c9na00624a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 11/24/2019] [Indexed: 06/16/2023]
Abstract
Nanostructured composite particles of nano- and submicron sizes were synthesized by a combination of sol-gel and sonochemical techniques. Their graphene content was 0.8-0.9 wt%. These layered particles consisted of graphene sheets in which zirconia nanocrystals were discretely incorporated. The synthesized powders were characterized using XRD, TEM, HRTEM, diffusion aerosol spectrometry and elemental analysis. A comparison of the compressibility modulus, limit values of linear section deformation and compressibility factor shows that the compressibility of the composite is difficult to achieve compared to that of pure zirconia, apparently, due to the low elasticity of graphene sheets.
Collapse
Affiliation(s)
- E A Trusova
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
| | - D D Titov
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
| | - A N Kirichenko
- Technological Institute for Superhard and Novel Carbon Materials 7a Tsentralnaya street, Troitsk Moscow 142190 Russia
| | - E V Shelekhov
- National University of Science and Technology (MISiS) 4 Leninskiy pr. Moscow 119049 Russia
| | - N S Trutnev
- Moscow Polytechnic University 38 Bol'shaya Semenovskaya street Moscow 107023 Russia
| | - A M Afzal
- Baikov Institute of Metallurgy and Materials Science RAS, 49 Leninsky pr. Moscow 119334 Russia
- Peoples' Friendship University of Russia 6 Miklukho-Maklaya str. Moscow 117198 Russia
| | - I A Perezhogin
- Technological Institute for Superhard and Novel Carbon Materials 7a Tsentralnaya street, Troitsk Moscow 142190 Russia
- Lomonosov Moscow State University Leninskie Gory Moscow 119991 Russia
- Moscow Institute of Physics and Technology State University 9 Institutskiy Per., Dolgoprudny Moscow Region 141700 Russia
| |
Collapse
|
12
|
Facile Sonochemical Preparation of Au-ZrO2 Nanocatalyst for the Catalytic Reduction of 4-Nitrophenol. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10020503] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
High-intensity ultrasonic waves have great potential for the green synthesis of various nanomaterials under mild conditions and offer an excellent alternative for hazardous chemical methods. Herein a facile approach for the eco-friendly synthesis of Au-ZrO2 nanocatalyst with a high catalytic activity using a facile ultrasonic method is presented. Gold (Au) in the nanosize regime was successfully deposited on the surface of solvothermally synthesized monodispersed ZrO2 nanoparticles (ZrO2 NPs) in a very short period of time (5 min) at room temperature. Spherical shape small size Au nanoparticles that are uniformly dispersed on the surface of ZrO2 nanoparticles were obtained. Notably, in the absence of ZrO2 nanoparticles, HAuCl4 could not be reduced, indicating that nano-sized ZrO2 not only acted as support but also helped to reduce the gold precursor at the surface. The as-prepared Au-ZrO2 nanocatalyst was characterized by various techniques. The Au-ZrO2 nanocatalyst served as a highly efficient reducing catalyst for the reduction of 4-nitrophenol. The reaction time decreased with increasing the amount of catalyst.
Collapse
|