4.6 Article

Adsorption and photocatalytic decomposition of methylene blue on surface modified silica and silica-titania

Publisher

ELSEVIER
DOI: 10.1016/j.colsurfa.2008.04.035

Keywords

adsorption; silica-titania; methylene blue; photocatalysis; surface modification

Ask authors/readers for more resources

The adsorption behavior of reactants onto a silica-titania photocatalyst's surface can affect catalytic performance. In this work, the affects of surface functionalization on the adsorption behavior of methylene blue on silica and a silica-titania photocatalyst were investigated. The materials before and after surface modification were characterized by infrared spectrometry. Adsorption isotherms of methylene blue on silica functionalized with alkyl, amino, thiol, cyano, and thiocyano groups showed distinct differences from one another as well as from the unmodified material. Silica-titania was functionalized with thiol and thiocyano groups. The methylene blue adsorption isotherms compared to unmodified silica-titania were similarly affected, but to a lesser extent. Thiocyano groups on surface modified silica-titania were stable to UV photolysis, and the material retained photocatalytic activity. (C) 2008 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Article Polymer Science

Intermediates of tris(pentafluorophenyl)borane and dimethyl carbonate pave the way for deeper organosiloxane depolymerization reactions

Iryna Protsak, Volodymyr Gun'ko, Yevhenii Morozov, Ian M. Henderson, Dong Zhang, Zhang Yinjun, Volodymyr Turov

Summary: This study investigated the cleavage of siloxane bonds in polydimethylsiloxane using a mixture of dimethyl carbonate and tris(pentafluorophenyl)borane, finding that the cleavage can be achieved under mild conditions. The addition of tris(pentafluorophenyl)borane enhanced the depolymerization process, showing potential for silicone recycling and production of new OS polymers. Computational calculations revealed the mechanism behind the cleavage reaction, suggesting stable complexes formation between DMC molecules and B(C6F5)(3).

POLYMER JOURNAL (2021)

Article Nanoscience & Nanotechnology

Preparation and characterization of Ni-Co/SiO2 nanocomposite catalysts for CO2 methanation

Alla G. Dyachenko, Olena V. Ischenko, Olena V. Goncharuk, Mykola V. Borysenko, Olexandr V. Mischanchuk, Volodymyr M. Gun'ko, Dariusz Sternik, Vladyslav V. Lisnyak

Summary: Four different catalysts were prepared for CO2 methanation, with Ni(5)Co(5)/SiO2 and Ni(2)Co(8)/SiO2 showing excellent catalytic activity and high methane yield. The methanation reaction was found to pass through the formation of O-containing intermediates bound to the active Ni-Co and nanosilica sites, as revealed by thermo-programmed desorption mass spectroscopy.

APPLIED NANOSCIENCE (2022)

Article Chemistry, Physical

Atomic charge distribution functions as a tool to analyze electronic structure of molecular and cluster systems

Vladimir M. Gun'ko

Summary: The characteristics calculated using quantum chemical methods can be attributed to local electronic structures of individual atoms in complex systems. Average values may not be accurate due to variations in atomic characteristics. The study aims to utilize distribution functions of atomic charges, chemical shifts, and molecular orbital energies as simple tools for analyzing complex systems.

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY (2021)

Article Chemistry, Physical

Interfacial behavior of polar and nonpolar frozen/unfrozen liquids interacting with hydrophilic and hydrophobic nanosilicas alone and in blends

Vladimir V. Turov, Vladimir M. Gun'ko, Tetyana Krupska, Mykola Borysenko, Mykola T. Kartel

Summary: The study explores the effects of hydrophobization on nanosilica properties and the possibility of preparing hydrophilic samples by adding water and mechanical treatment. It was found that the density of the samples increases at specific water content, and the interaction energy between water and nanoparticles shows a non-monotonic relationship.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2021)

Article Polymer Science

Polymer Adsorbents vs. Functionalized Oxides and Carbons: Particulate Morphology and Textural and SurfaceCharacteristics

Volodymyr M. Gun'ko

Summary: The article discusses how to extract quantitative information from experimental data for complex materials characterization, using various methods such as X-ray scattering, thermoporometry, and spectroscopy. It is important to use appropriate physicomathematical models and computational programs to accurately describe the material properties. The most accurate characterization of complex materials is achieved by using multiple complemented methods simultaneously to enhance the understanding of material behavior.

POLYMERS (2021)

Article Chemistry, Physical

Temperature (200-283 K) dependence of methane adsorption onto hydrophobic nanosilica/arginine composite at various hydration

Vladimir V. Turov, Vladimir M. Gun'ko, Tetyana Krupska, Mykola Borysenko, Magdalina D. Tsapko, Nataliia Guzenko, Mykola T. Kartel

Summary: This study investigates the improved methane adsorption conditions provided by the nanoparticle/aggregate/agglomerate structure, texture, and surface characteristics of hydrophobic nanosilica AM1 treated with arginine and water. Characterization methods such as adsorption, desorption, microscopy, spectroscopy, XRD, SAXS, and quantum chemistry were used. The presence of bound water in wetted composites enhances nanoporosity and facilitates methane adsorption up to 7.3-4.9 wt% at 199-283 K.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

Article Chemistry, Physical

Controlled confined space effects on clustered water bound to hydrophobic nanosilica with nonpolar and polar co-adsorbates

Volodymyr V. Turov, Tetyana V. Krupska, Nataliia V. Guzenko, Mykola V. Borysenko, Yury M. Nychiporuk, Volodymyr M. Gun'ko

Summary: This study investigates the influence of hierarchical nanoparticle/aggregate/agglomerate structure, texture, and surface characteristics of hydrophobic nanosilica AM1 stirred with a small amount of water on the behaviors of weakly and strongly associated waters. The results show significant reorganization of the interfacial water forming clusters and domains differently affected by various co-adsorbates. The findings provide insights into the quantitative analysis of weakly and strongly associated waters affected by different co-adsorbates.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2022)

Article Environmental Sciences

Development, Synthesis and Characterization of Tannin/Bentonite-Derived Biochar for Water and Wastewater Treatment from Methylene Blue

Mariia Galaburda, Alicja Bosacka, Dariusz Sternik, Viktor Bogatyrov, Olena Oranska, Volodymyr Gun'ko, Anna Derylo-Marczewska

Summary: In this study, novel hybrid carbon-mineral materials were synthesized and their adsorption efficiency in wastewater treatment was investigated. The results showed that the materials exhibited good adsorption performance and differentiated selectivity towards different organic compounds. These findings demonstrate the potential of biochars as materials for water and wastewater remediation.

WATER (2022)

Article Chemistry, Physical

Structural features of fumed binary and ternary nanooxides with silica, alumina, and titania

V. M. Gun'ko

Summary: Complex fumed nanooxides SiO2/Al2O3, SiO2/TiO2, and Al2O3 /SiO2/TiO2 were studied and found that the interior and surface contents of alumina in SA and AST are nonmonotonic functions of total Al2O3 content, while the titania in ST and AST is not affected. This is due to the difference in precursor reactivity of Al2Cl6 and SiCl4 vapor compared to TiCl4 and SiCl4 vapor. Additionally, titania tends to form cores while silica forms NPNP shells.

CHEMICAL PHYSICS (2022)

Article Environmental Sciences

Physicochemical and Sorption Characteristics of Carbon Biochars Based on Lignin and Industrial Waste Magnetic Iron Dust

Mariia Galaburda, Alicja Bosacka, Dariusz Sternik, Olena Oranska, Mykola Borysenko, Volodymyr Gun'ko, Anna Derylo-Marczewska

Summary: Magnetosensitive biochars were prepared by mechanochemical ball-milling of lignin and blast furnace dust, followed by pyrolysis. The materials were characterized using various techniques, and the adsorption studies showed their potential in water remediation.

WATER (2023)

Article Chemistry, Physical

Influence of machining duration of 0.8SiO2/0.2Al2O3 nanopowder on electrochemical characteristics of lithium power sources

Yu. V. Yavorskyi, A. B. Hrubiak, Ya. V. Zaulychnyy, M. V. Karpets, V. V. Moklyak, V. M. Gun'ko, O. I. Dudka

Summary: This study investigates the relationship between the electrochemical properties and grinding duration of mixed nanosilica and nanoalumina powders. It explores the impact of structural and morphological changes on the electrochemical characteristics of the nanocomposite powder. The study utilizes techniques such as scanning electron spectroscopy, X-ray diffraction analysis, and ultra-soft X-ray emission spectroscopy to analyze the structural and morphological characteristics.

APPLIED SURFACE SCIENCE (2023)

Article Chemistry, Physical

Surroundings effects on the interfacial and temperature behaviors of NaOH/water bound to hydrophilic and hydrophobic nanosilicas

Volodymyr M. Gun'ko, Volodymyr V. Turov, Tetyana Krupska, Mykola Borysenko

Summary: This study investigates the temperature and interfacial behaviors of concentrated alkali solutions under confined space effects. The findings illustrate that the characteristics of bound water and water/NaOH clusters strongly depend on the hydrophilicity/hydrophobicity of nanosilicas, dispersion media, and the deposition sequence of NaOH and water.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Biochemistry & Molecular Biology

Selected Textural and Electrochemical Properties of Nanocomposite Fillers Based on the Mixture of Rose Clay/Hydroxyapatite/Nanosilica for Cosmetic Applications

Victoria Paientko, Olena I. Oranska, Volodymyr M. Gun'ko, Ewa Skwarek

Summary: To improve the properties of rose clay composites, mechanical treatment was used to prepare nanostructured composites with natural and synthetic nanomaterials. Various characterization methods were employed to analyze the materials. The composites showed enhanced release of bioactive substances and demonstrated potential for cosmetic applications.

MOLECULES (2023)

Article Chemistry, Multidisciplinary

Resource-saving synthesis of nanoscaled silicon dioxide and its textural characteristics

Mirtemir Kurbanov, Lyudmyla Andriyko, Jamshid Panjiev, Sardor Tulaganov, Volodymyr Gun'ko, Andrii Marynin, Stanislaw Pikus

Summary: A new pilot plant equipment has been developed that utilizes the physical effects of sublimation and desublimation for processing silicon-containing raw materials. By using this equipment, amorphous silicon dioxide and iron oxide can be separated from metallurgical waste, resulting in a collective concentrate of valuable components.

JOURNAL OF NANOPARTICLE RESEARCH (2023)

Article Nanoscience & Nanotechnology

Water Clusterization in the Interparticle Space of Hydrophobic Nanosilica AM-1

T. Krupskaya, V. M. Gun'ko, L. S. Andriyko, N. Yelahina, V. V. Turov

Summary: The study showed that in hydrated powders, water fills the interparticle voids of nanosilica in the form of submicron clusters, with interfacial energy directly proportional to added water. At high water concentrations, water structures spontaneously increase in size, accompanied by a sharp decrease in interfacial energy. Aqueous suspensions of AM-1 easily mix with chloroform, forming stable suspensions, and methyl silica suspensions exhibit high thixotropic properties depending on applied mechanical loads.

PHYSICS AND CHEMISTRY OF SOLID STATE (2021)

Article Chemistry, Physical

BiOCl as the role of cleaner for the fabrication of self-cleaning PES membranes based on the RTIPS method

Wenjing Tan, Chunmei Gao, Shifeng Ji, Yunqing Xing, Yi Guo, Baogui Liang

Summary: Membrane separation technology is widely used in wastewater treatment due to its cost-effectiveness and productivity. However, organic membrane fouling caused by humic acid is a major barrier to its further development. This study successfully addressed this issue through the production of composite materials and self-cleaning membranes, providing beneficial strategies and solutions for membrane contamination problems.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Low-temperature plasma-induced porous Sb2WO6 microspheres with rich oxygen vacancies to promote high-performance photocatalytic activity

Qichang Peng, Qingdong Ruan, Bin Wang, Jinyuan Liu, Chao Huang, Xingwang Zhu, Dan Li, Liangliang Liu, Yinchuan Wang, Xiaolin Zhang, Jia Yan, Paul K. Chu, Hui Xu

Summary: The escalating issue of water pollution has led to significant attention in the field of photocatalysis. In this study, OV-Sb2WO6-X photocatalyst with oxygen vacancies was synthesized, which exhibited enhanced charge separation efficiency and improved photocatalytic activity. The introduction of oxygen vacancies was successfully controlled and characterized, and the modified photocatalyst showed superior degradation efficiency for dye wastewater treatment.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Preparation and application of self-emulsifying curing agent for CO2 high-pressure corrosion-resistant resin cement

Wangcheng Zhang, Cunchuan Zheng, Hu Xie, Weichao Du

Summary: By using a specific curing agent ETB, the problem of dispersion and stability for oily epoxy resin in cement slurry system has been successfully solved. The application of the emulsified curing agent ETB in oilfield cement slurry system shows good rheological performance, resistance to high temperature and high pressure water loss, and corrosion resistance.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

New approaches for regulation of structure and adsorption properties of biochar based on freshwater sediments (sapropels)

O. I. Krivonos, A. Babenko, O. B. Belskaya

Summary: This study synthesized biochar based on sapropel and investigated the effects of chemical modification on its textural characteristics, acid-base properties, and adsorption properties. The results showed that the chemical modification increased the fraction of micropores, specific surface area, and changed the surface properties of biochar. The experiment also revealed that biochar pretreated with alkali exhibited the maximum adsorption capacity for copper ions. A conceptual model identifying the mechanisms of copper adsorption on sapropel-based biosorbent was proposed.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Detailed experimental performance of two new pyrimidine-pyrazole derivatives as corrosion inhibitors for mild steel in HCl media combined with DFT/MDs simulations of bond breaking upon adsorption

H. Lachhab, N. Benzbiria, A. Titi, S. Echihi, M. E. Belghiti, Y. Karzazi, A. Zarrouk, R. Touzani, C. Jama, F. Bentiss

Summary: The corrosion inhibitory potency of two new pyrimidine-pyrazole derivatives, PPA and PPC, was evaluated for mild steel in 1 M HCl. The results showed enhanced inhibition activities with increased concentration, reaching maximal values of 91.15% and 92.39% for PPA and PPC, respectively. However, the mitigation potency decreased with increasing temperature. SEM and XPS analysis revealed that PPA and PPC adsorbed on the mild steel surface, forming a shielding layer that prevented the dissolution of the steel in the acidic solution.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Encapsulation of essential oil to prepare environment friendly nanobio-fungicide against Fusarium oxysporum f.sp. lycopersici: An experimental and molecular dynamics approach

Shanmugapriya Sivalingam, D. Jeya Sundara Sharmila, Goutham Golla, Lakshmanan Arunachalam, Tarunendu Singh, G. Karthikeyan, A. Shanthi, Kannan Malaichamy

Summary: This study aims to develop a nano-biofungicide comprising of volatile essential oil molecules to enhance its efficacy in the field of agriculture through easily scalable green synthesis technique. The nano biofungicide was prepared through one pot hot melt ultrasonication technique with easy water dispersibility and long term stability. The physico-chemical analysis revealed that, nano bio-fungicides were amorphous sphere-shaped nanoparticles with low melting point. The encapsulation efficiency of major components of essential oil was determined, and it was found that they followed Higuchi model of release kinetics. The essential oil loaded nanostructured lipid carrier showed significantly higher mycelial growth inhibition compared to pure essential oil, indicating enhanced bio-efficacy.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Waterborne epoxy composite coating with long-term corrosion resistance through synergy of MXene nanosheets and ZnO quantum dots

Yinlong Li, Yingqing Zhan, Yiwen Chen, Hongshan Jia, Ximin Chen, Fei Zhu, Xulin Yang

Summary: In this study, ZnO quantum dots decorated MXene nanosheets were used as a functional filler for waterborne epoxy coating. The improved dispersion and synergy of ZnO QDs and MXene nanosheets enhanced the anticorrosion performance of the coating.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Alginate-based aerogel fibers with a sheath-core structure for highly efficient methylene blue adsorption via directed freezing wet-spinning

Fucheng Guan, Jing Tao, Qiang Yao, Zheng Li, Yihang Zhang, Shi Feng, Jianbin Sun, Qiang Yang, Xuecui Song, Jing Guo, Yuanfa Liu

Summary: This paper presents a method for preparing adsorbent materials based on biomass that can efficiently adsorb methylene blue. The experimental results show that the material has a hierarchical structure, high adsorption capacity, and reusability.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

In-situ study on the heterocoagulation between fine coal particles and coarse glass beads by the particle vision and measurement (PVM) techniques

Pengfei Hu, Zuli Mo, Weiliang Wang, Chengzhe Li, Zhaojia Guo, Guanqing Lin, Zhimin Guo

Summary: This study developed a novel in-situ particle vision and measurement (PVM) system to investigate heterocoagulation between coarse and fine particles in mineral processing. The experimental results showed that the degree of heterocoagulation decreased with increasing pH and stirring speed. Furthermore, under certain hydrodynamic conditions, coal particles were more distributed at the rear of the glass bead.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Label-free immunosensor for detection of hepatitis C (HCV) core antigen using ternary polypyrrole-Ag doped ZnO-exfoliated graphene nanocomposite

Tanveer ul Haq Zia, Anwar ul Haq Ali Shah, Behisht Ara, Kashif Gul

Summary: A label-free immunosensor for detection of hepatitis C core antigen was fabricated using a ternary nanocomposite based on polypyrrole, silver doped zinc oxide, and exfoliated graphene. The immunosensor demonstrated low detection limit, high selectivity, and stability.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Zwitterionic polymers as high-performance coatings for hemoperfusion adsorbents and their chemisorption of protein-bound toxins through computational simulations

Xiaoyan Feng, Jiachen Li, Lijun Liang, Linli Zhu, Sa Liu, Li Ren

Summary: In this study, polystyrene divinylbenzene microspheres were surface-modified by poly(carboxybetaine methacrylate) to develop an efficient hemoperfusion adsorbent for the removal of protein-bound toxins. The modified microspheres showed increased adsorption capacity and better biocompatibility, making them promising for clinical hemoperfusion therapy.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

A flexible high-efficiency approach to preparing a durable flame-retardant cellulosic fabric as well as the research of the property

Xiaoye Bi, Dong Xue, Yunpeng Wang, Chencheng Lv, Zexiong Li, Tao Zhao

Summary: This research aimed to develop a durable and formaldehyde-free flame retardant treatment for cotton fabrics. The results demonstrated successful grafting of phosphorous acid (PA) onto cotton fabrics, leading to enhanced flame resistance while maintaining the desired fabric characteristics.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Inhibiting mechanisms and applications of novel Al-starch for ultrafine gangue minerals based on experimental and computational study

Ruolin Wang, Wenjuan Sun, Haisheng Han, Dongping Tao

Summary: This study finds that Al-starch colloidal depressants can effectively inhibit the flotation of ultrafine calcite and chlorite, and increase the grade of valuable minerals. The chemisorption of Al-starch on mineral surface changes the functional group peaks and generates new O-Al functional groups.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Tuneable functionalized biochar for simultaneous removal of pharmaceuticals from binary mixture

Wondimu K. Wakejo, Ali Maged, Beteley T. Meshesha, Joon W. Kang, Abayneh G. Demesa, Sandip Chakrabarti, Thallada Bhaskar, Ashok Kumar Gupta, Amit Bhatnagar

Summary: Simultaneously removing different pharmaceutical pollutants from wastewater is an important environmental issue, and the use of a system that can remove multiple contaminants at once is necessary. Functionalized biochar (FBC) has been found to be effective in simultaneously removing acetaminophen and ciprofloxacin and other pharmaceutical pollutants.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)

Article Chemistry, Physical

Full utilization of Cu single atoms on carbon nitride nanofibers for enhanced Fenton-like degradation of methylene blue

Yu Wang, Fengwen Yan, Jie Wu, Zhijun Huang, Liuting Song, Shunda Yuan

Summary: In this study, Cu single atoms are anchored on the external surface of g-C3N4 nanofibers to maximize atom utilization. This catalyst exhibits excellent Fenton-like catalytic activity and good stability due to the full utilization of Cu active sites.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2024)