1
|
Fu Q, Xie D, Ge J, Zhang W, Shan H. Negatively Charged Composite Nanofibrous Hydrogel Membranes for High-Performance Protein Adsorption. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12193500. [PMID: 36234628 PMCID: PMC9565482 DOI: 10.3390/nano12193500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/26/2022] [Accepted: 10/01/2022] [Indexed: 06/02/2023]
Abstract
Nanofibrous materials are considered as promising candidates for fabricating high-efficiency chromatography media, which are urgently needed in protein pharmaceuticals purification and biological research, yet still face several bottlenecks. Herein, novel negatively charged composite nanofibrous hydrogel membranes (NHMs) are obtained by a facile combination of electrospinning and surface coating modification. The resulting NHMs exhibit controllable morphologies and chemical structures. Benefitting from the combined effect of the stable framework of silicon dioxide (SiO2) nanofiber and the function layer of negatively charged hydrogel, as well as good pore connectivity among nanofibers, NHMs exhibit a high protein adsorption capacity of around 1000 mg g-1, and are superior to the commercial cellulose fibrous adsorbent (Sartobind®) and the reported nanofibrous membranous adsorbents. Moreover, due to their relatively stable physicochemical and mechanical properties, NHMs possess comprehensive adsorption performance, favorable resistance to acid and solvents, good selectivity, and excellent regenerability. The designed NHMs composite adsorbents are expected to supply a new protein chromatography platform for effective protein purification in biopharmaceuticals and biochemical reagents.
Collapse
Affiliation(s)
- Qiuxia Fu
- School of Textile and Clothing, Nantong University, Nantong 226019, China
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong University, Nantong 226019, China
| | - Dandan Xie
- School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Jianlong Ge
- School of Textile and Clothing, Nantong University, Nantong 226019, China
| | - Wei Zhang
- School of Textile and Clothing, Nantong University, Nantong 226019, China
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong University, Nantong 226019, China
| | - Haoru Shan
- School of Textile and Clothing, Nantong University, Nantong 226019, China
- National and Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, Nantong University, Nantong 226019, China
| |
Collapse
|
2
|
Chen Y, Wu Q, Wang J, Song Y. RETRACTED: Visible-light-induced photocatalytic mitigation of ibuprofen using magnetic black TiO 2-x/CaFe 2O 4 decorated on diatomaceous earth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 763:142960. [PMID: 33109374 DOI: 10.1016/j.scitotenv.2020.142960] [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: 06/18/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editors-in-Chief. Jun Wang and Youtao Song are listed as authors on the manuscript but have informed the journal that this occurred without their consent or knowledge of the submission and the email addresses provided were fake. Jun Wang and Youtao Song do not support the scientific conclusions of the article. Qiong Wu and Yan Chen furthermore note significant scientific errors with the article (including the wrong deconvolution method used for analysis of the XPS data, misuse of some characterization images and inability to reproduce some of the photodegradation data). One of the conditions of submission of a paper for publication is that all authors must be aware of and agree with its submission. As such this article represents a misuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.
Collapse
Affiliation(s)
- Yan Chen
- College of Environment, Liaoning University, Shenyang, PR China
| | - Qiong Wu
- College of Environment, Liaoning University, Shenyang, PR China
| | - Jun Wang
- College of Environment, Liaoning University, Shenyang, PR China; College of Chemistry, Liaoning University, Shenyang, PR China.
| | - Youtao Song
- College of Environment, Liaoning University, Shenyang, PR China.
| |
Collapse
|
3
|
Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review. Catalysts 2020. [DOI: 10.3390/catal10070804] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A high-efficiency method to deal with pollutants must be found because environmental problems are becoming more serious. Photocatalytic oxidation technology as the environmentally-friendly treatment method can completely oxidate organic pollutants into pollution-free small-molecule inorganic substances without causing secondary pollution. As a widely used photocatalyst, titanium dioxide (TiO2) can greatly improve the degradation efficiency of pollutants, but several problems are noted in its practical application. TiO2 modified by different materials has received extensive attention in the field of photocatalysis because of its excellent physical and chemical properties compared with pure TiO2. In this review, we discuss the use of different materials for TiO2 modification, highlighting recent developments in the synthesis and application of TiO2 composites using different materials. Materials discussed in the article can be divided into nonmetallic and metallic. Mechanisms of how to improve catalytic performance of TiO2 after modification are discussed, and the future development of modified TiO2 is prospected.
Collapse
|
4
|
Hafdi H, Joudi M, Mouldar J, Hatimi B, Nasrellah H, El Mhammedi MA, Bakasse M. Design of a new low cost natural phosphate doped by nickel oxide nanoparticles for capacitive adsorption of reactive red 141 azo dye. ENVIRONMENTAL RESEARCH 2020; 184:109322. [PMID: 32146215 DOI: 10.1016/j.envres.2020.109322] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 02/14/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
Nickel oxide doped natural phosphate (NP/NiO) nanoparticles were thermally synthesized for effective adsorption of Reactive Red 141 (RR141) as toxic dye model, characterization methods such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy combined with energy dispersive X-ray analysis(SEM-EDAX)and have been employed to identify the adsorbent. Surface area and pore size volume were determined by the Brunauer, Emmett and Teller (BET) method. Environmental factors such as pH, time of contact, initial RR141 concentration, the dose of adsorbent and solution temperature have been all put to the test to evaluate optimum adsorption activity. Thermal processing NP/NiO at 1% NiO doping percentage was effectual for exhibiting best adsorption behavior at an annealing temperature of 600 °C. Furthermore, batch experiments revealed significant adsorption activity reaching 96%. The maximal adsorption capacity was found to be 38.91 mg of RR 141 per 0.1 g of the adsorbent in only 40min of contact, at an initial colorant concentration of 20 mg L-1, pH 6 at ambient temperature and a volume of 100 ml. Langmuir isotherm model was more adequate to describe the adsorption process than the Freundlich model. The rate mechanism of the adsorption process was determined from the intraparticle diffusion model, Boyd plot revealed that the adsorption of the dye on the NP/NiO was mainly governed by film diffusion. Moreover, the dye adsorption was spontaneous and exothermic. The mechanism of adsorption may involve chemical adsorption through hydrogen bonding mechanism and electrostatic interactions between the dye molecules and the adsorbent. Thermal regeneration was feasible only for three cycles, the adsorbent also showed great potential for real textile wastewater treatment.
Collapse
Affiliation(s)
- H Hafdi
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco
| | - M Joudi
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco
| | - J Mouldar
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco
| | - B Hatimi
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco
| | - H Nasrellah
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco
| | - M A El Mhammedi
- University Soultan Moulay Slimane, Laboratory of Chemistry, Modeling and Environmental Sciences, Polydisciplinary Faculty, Khouribga, Morocco
| | - M Bakasse
- Laboratory of Chemistry Organic, Bioorganic and Environment, Faculty of Science, University Chouaib Doukkali, El Jadida, Morocco.
| |
Collapse
|
5
|
Adsorption Performance for Reactive Blue 221 Dye of β-Chitosan/Polyamine Functionalized Graphene Oxide Hybrid Adsorbent with High Acid-Alkali Resistance Stability in Different Acid-Alkaline Environments. NANOMATERIALS 2020; 10:nano10040748. [PMID: 32295277 PMCID: PMC7221750 DOI: 10.3390/nano10040748] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/10/2020] [Accepted: 04/12/2020] [Indexed: 11/17/2022]
Abstract
A hybrid material obtained by blending β-chitosan (CS) with triethylenetetramine-functionalized graphene oxide (TFGO) (CSGO), was used as an adsorbent for a reactive dye (C.I. Reactive Blue 221 Dye, RB221), and the adsorption and removal performances of unmodified CS and mix-modified CSGO were investigated and compared systematically at different pH values (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12). The adsorption capacities of CS and CSGO were 45.5 and 56.1 mg/g, respectively, at a pH of 2 and 5.4 and 37.2 mg/g, respectively, at a pH of 12. This indicates that TFGO was successfully introduced into CSGO, enabling π-π interactions and electrostatic attraction with the dye molecules. Additionally, benzene ring-shaped GO exhibited a high surface chemical stability, which was conducive to maintaining the stability of the acid and alkali resistance of the CSGO adsorbent. The RB221 adsorption performance of CS and CSGO at acidic condition (pH 3) and alkaline condition (pH 12) and different temperatures was investigated by calculating the adsorption kinetics and isotherms of adsorbents. Overall, the adsorption efficiency of CSGO was superior to that of CS; thus, CSGO is promising for the treatment of dye effluents in a wide pH range.
Collapse
|
6
|
Lee JC, Gopalan AI, Saianand G, Lee KP, Kim WJ. Manganese and Graphene Included Titanium Dioxide Composite Nanowires: Fabrication, Characterization and Enhanced Photocatalytic Activities. NANOMATERIALS 2020; 10:nano10030456. [PMID: 32143287 PMCID: PMC7153601 DOI: 10.3390/nano10030456] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 11/16/2022]
Abstract
We report the detailed microstructural, morphological, optical and photocatalytic studies of graphene (G) and manganese (Mn) co-doped titanium dioxide nanowires (TiO2(G–Mn) NWs) prepared through facile combined electrospinning–hydrothermal processes. The as-prepared samples were thoroughly characterized using X-ray diffraction (XRD), transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and diffuse reflectance spectroscopy (DRS). XRD studies reveal the formation of mixed anatase-rutile phases or rutile phase depending on the dopant (Mn) precursor concentrations in the electrospinning dope and calcination temperature. The evaluation of lattice parameters revealed that the incorporation of Mn species and carbon atoms in to the lattice of anatase or rutile TiO2 could occur through substituting the sites of oxygen atoms. XPS results confirm the existence of Mn2+/Mn3+ within the TiO2 NW. Raman spectroscopy provides the evidence for structural modification because of the graphene inclusion in TiO2 NW. The optical band gap of G–Mn including TiO2 is much lower than pristine TiO2 as confirmed through UV-vis DRS. The photocatalytic activities were evaluated by nitric oxide (NOx) degradation tests under visible light irradiation. Superior catalytic activity was witnessed for rutile G–Mn-co-doped TiO2 NW over their anatase counterparts. The enhanced photocatalytic property was discussed based on the synergistic effects of doped G and Mn atoms and explained by plausible mechanisms.
Collapse
Affiliation(s)
- Jun-Cheol Lee
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (J.-C.L.); (A.-I.G.); (K.-P.L.)
| | - Anantha-Iyengar Gopalan
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (J.-C.L.); (A.-I.G.); (K.-P.L.)
| | - Gopalan Saianand
- Faculty of Science, The University of Newcastle, Callaghan, NSW 2308, Australia;
| | - Kwang-Pill Lee
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (J.-C.L.); (A.-I.G.); (K.-P.L.)
| | - Wha-Jung Kim
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (J.-C.L.); (A.-I.G.); (K.-P.L.)
- Correspondence: ; Tel.: +82-53-950-6335
| |
Collapse
|
7
|
Liu H, Zhu X, Han R, Dai Y, Sun Y, Lin Y, Gao D, Wang X, Luo C. Study on the internal electric field in the Cu2O/g-C3N4 p–n heterojunction structure for enhancing visible light photocatalytic activity. NEW J CHEM 2020. [DOI: 10.1039/c9nj05737d] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cu2O/g-C3N4 p–n heterojunction efficiently removes tetracycline in the presence of a built-in electric field.
Collapse
Affiliation(s)
- Hao Liu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Xiaodong Zhu
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Rui Han
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yuxue Dai
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yuanling Sun
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yanna Lin
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Dandan Gao
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Xueying Wang
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| | - Chuannan Luo
- Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- P. R. China
| |
Collapse
|
8
|
Ultrasound-Assisted Preparation of Chitosan/Nano-Activated Carbon Composite Beads Aminated with (3-Aminopropyl)Triethoxysilane for Adsorption of Acetaminophen from Aqueous Solutions. Polymers (Basel) 2019; 11:polym11101701. [PMID: 31623271 PMCID: PMC6835286 DOI: 10.3390/polym11101701] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 12/11/2022] Open
Abstract
A composite chitosan/nano-activated carbon (CS-NAC) aminated by (3-aminopropyl)triethoxysilane (APTES) was prepared in the form of beads and applied for the removal of acetaminophen from aqueous solutions. NAC and APTES concentrations were optimized to obtain a suitable adsorbent structure for enhanced removal of the pharmaceutical. The aminated adsorbent (CS-NAC-APTES beads) prepared with 40% w/w NAC and 2% v/v APTES showed higher adsorption capacity (407.83 mg/g) than CS-NAC beads (278.4 mg/g). Brunauer–Emmett–Teller (BET) analysis demonstrated that the surface area of the CS-NAC-APTES beads was larger than that of CS-NAC beads (1.16 times). The adsorption process was well fitted by the Freundlich model (R2 > 0.95), suggesting a multilayer adsorption. The kinetic study also substantiated that the pseudo-second-order model (R2 > 0.98) was in better agreement with the experimental data. Finally, it was proved that the prepared beads can be recycled (by washing with NaOH solution) at least 5 times before detectable performance loss.
Collapse
|
9
|
Chen Y, Wu Q, Wang J, Song Y. Visible-light-driven elimination of oxytetracycline and Escherichia coli using magnetic La-doped TiO 2/copper ferrite/diatomite composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:26593-26604. [PMID: 31292873 DOI: 10.1007/s11356-019-05873-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/28/2019] [Indexed: 06/09/2023]
Abstract
The development of powdery photocatalyst has long been studied, yet the low recovery in water is still its bottleneck. In this work, magnetic recyclable lanthanum-doped TiO2/copper ferrite/diatomite (La-TCD) ternary composite was synthesized via sol-gel method. The physicochemical properties of various hybrid catalysts were characterized and studied, and their photocatalytic properties were evaluated via the decomposition of antibiotic oxytetracycline and disinfection of bacteria Escherichia coli under visible light. The formation of heterojunction between La-doped TiO2 and copper ferrite hindered the recombination of photo-induced charge carriers and improved the photocatalytic activity. The photodecomposition rate of OTC was accelerated by the high adsorption ability of diatomite, due to the adsorption and decomposition synergistic effect between catalysts and substrate diatomite. The optimal La dopant amount as well as optimal catalyst dosage was determined. The composite could simply be recovered from waterbody via an external magnet, and the repetition tests indicated no obvious decrease of photoactivity. This nanocomposite presented good potential to be applied in environmental remediation process, due to its high photocatalytic efficiency under visible light, as well as its good reusability and stability.
Collapse
Affiliation(s)
- Yan Chen
- College of Environment, Liaoning University, Shenyang, 110036, People's Republic of China
| | - Qiong Wu
- College of Environment, Liaoning University, Shenyang, 110036, People's Republic of China
| | - Jun Wang
- College of Chemistry, Liaoning University, Shenyang, 110036, People's Republic of China.
| | - Youtao Song
- College of Environment, Liaoning University, Shenyang, 110036, People's Republic of China.
| |
Collapse
|
10
|
Wang Z, Zhou Y, Lu W, Peng N, Chen W. The Impact of TiO 2 Nanoparticle Concentration Levels on Impulse Breakdown Performance of Mineral Oil-Based Nanofluids. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E627. [PMID: 30999649 PMCID: PMC6523878 DOI: 10.3390/nano9040627] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/09/2019] [Accepted: 04/12/2019] [Indexed: 11/16/2022]
Abstract
The insulation of mineral oil-based nanofluids was found to vary with different concentration level of nanoparticles. However, the mechanisms behind this research finding are not well studied. In this paper, mineral oil-based nanofluids were prepared by suspending TiO2 nanoparticles with weight percentages ranging from 0.0057% to 0.0681%. The breakdown voltage and chop time of nanofluids were observed under standard lightning impulse waveform. The experimental results show that the presence of TiO2 nanoparticles increases the breakdown voltage of mineral oil under positive polarity. The enhancement of breakdown strength tends to saturate when the concentration of nanoparticle exceeds 0.0227 wt%. Electronic traps formed at the interfacial region of nanoparticles, which could capture fast electrons in bulk oil and reduce the net density of space charge in front of prebreakdown streamers, are responsible for the breakdown strength enhancement. When the particle concentration level is higher, the overlap of Gouy-Chapman diffusion layers results in the saturation of trap density in nanofluids. Consequently, the breakdown strength of nanofluids is saturated. Under negative polarity, the electrons are likely to be scattered by the nanoparticles on the way towards the anode, resulting in enhanced electric fields near the streamer tip and the decrement of breakdown voltage.
Collapse
Affiliation(s)
- Ziyi Wang
- 2011 Collaborative Innovation Center of Clean Energy and Smart Grid, Changsha University of Science & Technology, Changsha 410114, China.
| | - You Zhou
- 2011 Collaborative Innovation Center of Clean Energy and Smart Grid, Changsha University of Science & Technology, Changsha 410114, China.
| | - Wu Lu
- College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
| | - Neng Peng
- 2011 Collaborative Innovation Center of Clean Energy and Smart Grid, Changsha University of Science & Technology, Changsha 410114, China.
| | - Weijie Chen
- 2011 Collaborative Innovation Center of Clean Energy and Smart Grid, Changsha University of Science & Technology, Changsha 410114, China.
| |
Collapse
|