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article

Graphene oxide–BiOBr composite material as highly efficient photocatalyst for degradation of methylene blue and rhodamine-B dyes

S. Vadivel, M. Vanitha, A. Muthukrishnaraj, N. Balasubramanian, more

Journal of Water Process Engineering > 2014 > 1 > Complete > 17-26

A graphene oxide (GO)/BiOBr composite was successfully synthesized, using a simple two-step process. The tetragonal phase of BiOBr was incorporated into GO sheets, and was employed as a photocatalyst for the degradation of rhodamine-B (RhB) and methylene blue (MB) under visible light. The synthesized composites have been characterized by Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction...

article

Magnetically separable titania-coated nickel ferrite photocatalyst

Yun Seup Chung, Seung Bin Park, Duk-Won Kang

Materials Chemistry and Physics > 2004 > 86 > 2-3 > 375-381

A magnetically separable photocatalyst was prepared by a continuous multi-step spray pyrolysis process. In the first step, nickel ferrite core particles were prepared by an ultrasonic spray pyrolysis. In the second step, tetraethyl orthosilicate (TEOS) and titanium isopropoxide (TTIP) were sequentially injected and coated on the surface of the core particles. The sequentially coated layers were decomposed...

article

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi₂Fe₄O₉/C@AgBr composite

Mingliang Ma, Yan Chen, Yanyan Liu, Jiabin Jiang, more

Applied Organometallic Chemistry > 36 > 5 > n/a - n/a

Wastewater treatment has become a research hot issue in recent decade. Organic dyes as one of the main pollutants can change the water behavior. To deracinate the organic pollutants from wastewater, there are numerous methods have been taken into consideration. Photocatalysis is the promising strategy for the dye degradation with low cost, high efficiency, and environmental friendliness. Hence, a...

article

ZIF‐67 derived hollow double‐shell core Co₃O₄ modified g‐C₃N₄ to construct p‐n heterojunction for efficient photocatalytic hydrogen evolution

Dujuan Li, Xiaoli Ma, Peng Su, Zhibo Jiang, more

International Journal of Energy Research > 46 > 6 > 7479 - 7494

The imidazolium salt zeolite framework (ZIFs) organometallic framework materials have the advantages of high stability and controllable structure and are excellent materials for preparing photocatalytic semiconductors. In this study, the regular dodecahedron material ZIF‐67 was used as the substrate, and the intermediate was calcined after the substrate adsorbed Co‐based metal clusters to obtain Co...

article

Photocatalytic Degradation Properties of Li‐Cr Ions Substituted CoFe₂O₄ Nanoparticles for Wastewater Treatment Application

Rahul Kalia, Ankush Chauhan, Ritesh Verma, Mansi Sharma, more

physica status solidi (a) > 219 > 8 > n/a - n/a

Herein, the dual substitution of Li/Cr in CoFe₂O₄ ferrite nanoparticles synthesized through the sol‐gel auto combustion method is reported. X‐ray diffraction confirms mixed cubic spinel structure, while as dense morphology with well‐defined grain boundaries with the minimum grain size of 20 nm is obtained using FE‐TEM analysis. The thermal stability of the sample improves with an increase in dopant...

article

Synergistic performance of Fe₃O₄/SnO₂/rGO nanocomposite for supercapacitor and visible light‐responsive photocatalysis

Md Rezaul Karim, Akbar Mohammad, Moo Hwan Cho, Taeho Yoon

International Journal of Energy Research > 46 > 5 > 6517 - 6528

The performance of nanomaterials in energy storage devices and catalysts is influenced by their size and surface area. In addition, because the surface accessibility to ions or reactants significantly affects the performance of the devices, the surface area and pore structure of the nanomaterials are critical design parameters. Herein, a nanocomposite containing Fe₃O₄, SnO₂, and reduced graphene...

article

Nanotechnological approaches as a promising way for heavy metal mitigation in an aqueous system

Peraman Muthukumaran, Palanisamy Suresh Babu, Shanmugasundaram Shyamalagowri, Murugesan Kamaraj, more

Journal of Basic Microbiology > 62 > 3-4 > 376 - 394

The ever‐rising environmental problems because of heavy metals emerging from anthropogenic activities pose an impending threat to all biota globally. Considering their persistence and possibility in biomagnification, they are prominent among pollutants. There has been an apparent shift of research interest in advancing cost‐effective and competent technologies to mitigate environmental contaminants,...

article

Pulsed‐UV illumination on graphene oxide: A new strategy in photocatalytic synthesis of electrocatalysts to control the structural and electrochemical properties

Navid Haghmoradi, Zahide Tuğba Sarı, Emre Utku Öztürk, Siddhartha Peri, more

International Journal of Energy Research > 46 > 4 > 5200 - 5214

This study demonstrated the capability of a novel method in controlling the structural and electrochemical properties of electrocatalysts, utilizing a pulsed‐ultraviolet (UV) setup for the synthesis procedure. A hand‐made reactor provided a new set of parameters. The variation of UV_on and UV_off periods resulted in samples with a range of different structures, compositions, and activities. Graphene/Pt...

article

Site‐Selective C(sp³)‐H Alkenylation Using Decatungstate Anion as Photocatalyst

Yi‐Ting Wang, Yi‐Lun Shih, Yen‐Ku Wu, Ilhyong Ryu

Advanced Synthesis & Catalysis > 364 > 5 > 1039 - 1043

Site‐selective C(sp³)‐H alkenylation was achieved under photo‐irradiation in the presence of a catalytic amount of decatungstate anion, W₁₀O₃₂⁴⁻. In this reaction, the radical addition/β‐scission sequence is successfully combined with photocatalytic C(sp³)‐H functionalization. The reaction using weaker C−H bonds such as those in THF revealed that the benzenesulfonyl radical itself underwent HAT directly...

article

Exploring the Synergy of B, Ce Dopants in Codoped Titanium Dioxide Multifunctional Photocatalysts for Antibiotic Degradation and Microbial Disinfection Under Solar Light

Manasa Manjunatha, Pranay R. Chandewar, Hari Mahalingam

physica status solidi (a) > 219 > 3 > n/a - n/a

An eco‐friendly, controllable citrate‐EDTA complexing sol–gel method is employed to systematically synthesize a series of B_xCe_1−xTiO₂ (x = 0.9, 0.8, 0.7 at%) codoped photocatalysts. The degradation of ciprofloxacin (CIP) and norfloxacin (NOR) antibiotics, as well as Escherichia coli disinfection under sunlight, is assessed using these synthesized codoped photocatalysts. After physicochemical characterization...

article

A Nanographene‐Based Two‐Dimensional Covalent Organic Framework as a Stable and Efficient Photocatalyst

Enquan Jin, Shuai Fu, Hiroki Hanayama, Matthew A. Addicoat, more

Angewandte Chemie > 134 > 5 > n/a - n/a

Synthesis of covalent organic frameworks (COFs) with desirable organic units furnishes advanced materials with unique functionalities. As an emerging class of two‐dimensional (2D) COFs, sp²‐carbon‐conjugated COFs provide a facile platform to build highly stable and crystalline porous polymers. Herein, a 2D olefin‐linked COF was prepared by employing nanographene, namely, dibenzo[hi,st]ovalene (DBOV),...

article

A Nanographene‐Based Two‐Dimensional Covalent Organic Framework as a Stable and Efficient Photocatalyst

Enquan Jin, Shuai Fu, Hiroki Hanayama, Matthew A. Addicoat, more

Angewandte Chemie International Edition > 61 > 5 > n/a - n/a

Synthesis of covalent organic frameworks (COFs) with desirable organic units furnishes advanced materials with unique functionalities. As an emerging class of two‐dimensional (2D) COFs, sp²‐carbon‐conjugated COFs provide a facile platform to build highly stable and crystalline porous polymers. Herein, a 2D olefin‐linked COF was prepared by employing nanographene, namely, dibenzo[hi,st]ovalene (DBOV),...

article

Synergy mechanism for TiO₂/activated carbon composite material: Photocatalytic degradation of methylene blue solution

Wenqi Xu, Yang Jin, Yongsheng Ren, Jun Li, more

The Canadian Journal of Chemical Engineering > 100 > 2 > 276 - 290

To improve the photocatalytic effect of TiO₂ and the possibility of recycling, three different types of commercial activated carbon (AC) are used to prepare the TiO₂/AC composite photocatalyst using the sol–gel method. The properties and catalytic activity of TiO₂/AC composite are evaluated in comparison with bare TiO₂, based on several characterization techniques and methylene blue (MB) photodegradation...

article

Facet Junction Engineering for Photocatalysis: A Comprehensive Review on Elementary Knowledge, Facet‐Synergistic Mechanisms, Functional Modifications, and Future Perspectives

Shaodong Sun, Liping He, Man Yang, Jie Cui, more

Advanced Functional Materials > 32 > 1 > n/a - n/a

A facet junction (also called facet heterojunction or surface heterojunction) is defined as a complex polyhedral single crystal exposed to two, three, or four types of crystallographic planes, and is a promising platform for achieving multifunctional photocatalysis. Compared with simple polyhedral counterparts enclosed by the same crystallographic planes or conventional heterogeneous junctions, facet...

article

Synthesis, Characterization, and Photocatalytic Activity of NiO Nanoflowers

Pradnya M. Bodhankar, Sapna Jadhav, Pradip B. Sarawade

Macromolecular Symposia > 400 > 1 > n/a - n/a

The sustainable development of pollution‐free technologies for environmental remediation has concerned significant attraction due to rapid growth of industrialization. Herein, synthesis of nanoflower‐like NiO porous nanostructures prepared from different nickel precursors by solvothermal method in combination with calcination treatment is reported. The obtained porous NiO‐Ac (prepared from nickel...

article

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

Kwang-Hyok Han, Yong-Ho Kim, In-Ho Pak, Ju-Hyon Yu, more

Chemical Engineering & Technology > 45 > 1 > 178 - 188

In order to enhance the effectiveness of pollutant removal by photocatalysis under visible light, a multifunctional photocatalyst was prepared by grafting polydopamine (PDA) with the core‐shell nanocomposite Fe₃O₄@SiO₂@TiO₂ (FST). The structural, morphological, and magnetic responses of FST@PDA were characterized by X‐ray diffraction pattern, Fourier transform infrared spectroscopy, transmission electron...

article

UV‐induced oxygenation of toluene enhanced by Co (acac)₂/9‐mesityl‐10‐methylacridinium ion/N‐hydroxyphthalimide tandem

Alexander Pokutsa, Kei Ohkubo, Andriy Zaborovski, Pawel Bloniarz

Asia‐Pacific Journal of Chemical Engineering > 16 > 6 > n/a - n/a

The effect of near‐UV irradiation on the oxygenation of toluene dissolved in MeCN was studied in a stainless‐steel reactor upon O₂ bubbling at 80°C and 100°C and 10 atm using Co (acac)₂ and 9‐mesityl‐2,7,10‐trimethylacridinium perchlorate (Me₂Acr⁺–Mes ClO₄⁻) as the catalyst and photocatalyst, respectively. In the absence of the process mediator N‐hydroxyphthalimide (NHPI), the rate of PhCH₃ oxidation...

article

Magnetic field‐assisted photochemical oxidation of benzyl alcohol to corresponding aldehydes by introducing TiO₂(P25)‐ZnO/Fe³⁺ as a novel nanophotocatalyst

Saied Fallahnezhad, Ali Amoozadeh

Journal of the Chinese Chemical Society > 68 > 11 > 2085 - 2092

For the first time, the surface modification of nanophotocatalyst TiO₂(P25)‐ZnO was reported by the introduction of Fe³⁺ for modulation of the photocatalytic activity. The nanophotocatalyst TiO₂(P25)‐ZnO/Fe³⁺ was synthesized and its crystal structure, morphology, and photocatalytic activity were well determined by, diffuse reflectance spectroscopy, energy dispersive X‐ray, X‐ray diffraction, and scanning...

article

Insights into the effect of halide enriched ZnO synthesized using tetrabutylammonium halides toward photocatalytic degradation of Rhodamine 6G

Sudhakar B. Satpal, Anjali A. Athawale

Environmental Progress & Sustainable Energy > 40 > 6 > n/a - n/a

ZnO and halide (Cl, Br, and I) enriched ZnO samples have been synthesized by polyol method. Halide enriched zinc oxide (ZnO‐X) were obtained when synthesis was carried out in the presence of tetrabutylammonium halide (X‐Cl, Br, and I) salts. X‐ray results reveal that the halide ions seem to occupy the oxygen vacancy sites as well as interstitial sites of the ZnO lattice increasing the cell volume...

article

Mn_0.₂Cd₀_.₈S modified with 3D flower‐shaped Co₃(PO₄)₂ for efficient photocatalytic hydrogen production

Xiaoli Ma, Dujuan Li, Peng Su, Zhibo Jiang, more

International Journal of Energy Research > 45 > 13 > 19453 - 19466

PO₄³⁻ ions have good conductivity and can provide open channels for rapid ion migration. In contrast, the solid solution Mn_0.2Cd_0.8S catalyst has been limited for a long time due to its low charge separation efficiency and its tendency to lead to rapid electrons and holes binding. Therefore, on the basis of in‐depth study catalysts of Co₃(PO₄)₂ and Mn_0.2Cd_0.8S, we successfully synthesized flake‐shaped...

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Search results

Graphene oxide–BiOBr composite material as highly efficient photocatalyst for degradation of methylene blue and rhodamine-B dyes

Magnetically separable titania-coated nickel ferrite photocatalyst

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi₂Fe₄O₉/C@AgBr composite

ZIF‐67 derived hollow double‐shell core Co₃O₄ modified g‐C₃N₄ to construct p‐n heterojunction for efficient photocatalytic hydrogen evolution

Photocatalytic Degradation Properties of Li‐Cr Ions Substituted CoFe₂O₄ Nanoparticles for Wastewater Treatment Application

Synergistic performance of Fe₃O₄/SnO₂/rGO nanocomposite for supercapacitor and visible light‐responsive photocatalysis

Nanotechnological approaches as a promising way for heavy metal mitigation in an aqueous system

Pulsed‐UV illumination on graphene oxide: A new strategy in photocatalytic synthesis of electrocatalysts to control the structural and electrochemical properties

Site‐Selective C(sp³)‐H Alkenylation Using Decatungstate Anion as Photocatalyst

Exploring the Synergy of B, Ce Dopants in Codoped Titanium Dioxide Multifunctional Photocatalysts for Antibiotic Degradation and Microbial Disinfection Under Solar Light

A Nanographene‐Based Two‐Dimensional Covalent Organic Framework as a Stable and Efficient Photocatalyst

A Nanographene‐Based Two‐Dimensional Covalent Organic Framework as a Stable and Efficient Photocatalyst

Synergy mechanism for TiO₂/activated carbon composite material: Photocatalytic degradation of methylene blue solution

Facet Junction Engineering for Photocatalysis: A Comprehensive Review on Elementary Knowledge, Facet‐Synergistic Mechanisms, Functional Modifications, and Future Perspectives

Synthesis, Characterization, and Photocatalytic Activity of NiO Nanoflowers

Fe₃O₄@SiO₂@TiO₂@PDA Nanocomposite for the Degradation of Organic Materials

UV‐induced oxygenation of toluene enhanced by Co (acac)₂/9‐mesityl‐10‐methylacridinium ion/N‐hydroxyphthalimide tandem

Magnetic field‐assisted photochemical oxidation of benzyl alcohol to corresponding aldehydes by introducing TiO₂(P25)‐ZnO/Fe³⁺ as a novel nanophotocatalyst

Insights into the effect of halide enriched ZnO synthesized using tetrabutylammonium halides toward photocatalytic degradation of Rhodamine 6G

Mn_0.₂Cd₀_.₈S modified with 3D flower‐shaped Co₃(PO₄)₂ for efficient photocatalytic hydrogen production

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