scholarly journals Double-Inverse-Opal-Structured Particle Assembly as a Novel Immobilized Photocatalytic Material

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Hikaru Namigata ◽  
Kanako Watanabe ◽  
Saya Okubo ◽  
Masashi Hasegawa ◽  
Keishi Suga ◽  
...  
Keyword(s):  
Decomposition Rate ◽  
Organic Pollutant ◽  
Inverse Opal ◽  
Dye Molecules ◽  
Particle Assembly ◽  
Highly Active ◽  
High Diffusion Rate ◽  
Flowing System ◽  
Photocatalytic Material ◽  
Direct Immobilization

Immobilization of photocatalysts on supports is an important method of adding highly active photocatalysts to a continuous flowing system without the need for photocatalyst recovery. However, direct immobilization prevents exposure to all photocatalytically active surfaces. Therefore, to immobilize particulate photocatalysts, while exposing the photocatalytic surface to organic pollutant water in a continuous flowing system, in this study, we employed double-inverse-opal (DIO) with periodically arranged, interconnected macropores, each containing a single photocatalytic particle. Increasing the macropore size successfully enhanced the decomposition rate of organic dye due to the high diffusion rate of dye molecules in the macropores of thin DIOs. However, an excessive increase in macropore size lowered the decomposition rate of dye molecules because an increase in DIO thickness caused the attenuation of light used to excite the photocatalytic particles. This study presents novel, immobilized photocatalytic DIO-structured particles that can be employed in continuous flowing reaction systems by tuning the photocatalytic particle size, macropore size, and DIO thickness.

Enhancing visible light photocatalytic performance with N-doped TiO2 nanotube arrays assisted by H2O2

2019 ◽  
Vol 33 (01n03) ◽  
pp. 1940025 ◽  
Author(s):  
Chao Xiong ◽  
Shengsen Zhang ◽  
Yu Zhao ◽  
Min Zheng ◽  
Dongdong Hou ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Organic Pollutant ◽  
Electrochemical Anodization ◽  
Nanotube Arrays ◽  
Pollutant Degradation ◽  
Organic Pollutant Degradation ◽  
Acid Orange Ii ◽  
Photocatalytic Material ◽  
Visible Light Photocatalytic

N-doped TiO2 nanotube arrays were prepared by an electrochemical anodization method and subsequent ammonia annealing. Microstructures, morphology, optical properties and photocatalytic properties of the N-doped TiO2 nanotube arrays were measured and analyzed. In the degradation of Acid Orange II(AO-II), the photocatalytic degradation efficiency of the N-doped TiO2 nanotube arrays assisted by H2O2 are 12 times, 2 times and 5 times higher than TiO2 nanotube arrays, TiO2 nanotube arrays assisted by H2O2 and H2O2, respectively. Experimental results show that the N-doped TiO2 nanotube arrays is a promising photocatalytic material for organic pollutant degradation under visible light, especially under the assistance of H2O2.

Silver nanoparticles deposited inverse opal film as a highly active and uniform SERS substrate

2015 ◽  
Vol 347 ◽  
pp. 514-519 ◽  
Author(s):  
Junhong Zhao ◽  
Jian Lin ◽  
Xiuhua Li ◽  
Guannan Zhao ◽  
Wenjun Zhang
Keyword(s):  
Silver Nanoparticles ◽  
Sers Substrate ◽  
Inverse Opal ◽  
Opal Film ◽  
Highly Active

Morphology effect of honeycomb-like inverse opal for efficient photocatalytic water disinfection and photodegradation of organic pollutant

2018 ◽  
Vol 444 ◽  
pp. 42-52 ◽  
Author(s):  
Yuanyuan Zhang ◽  
Lili Wang ◽  
Dandan Liu ◽  
Yangyang Gao ◽  
Chao Song ◽  
...  
Keyword(s):  
Organic Pollutant ◽  
Water Disinfection ◽  
Inverse Opal ◽  
Morphology Effect

Silver nanosheet-coated inverse opal film as a highly active and uniform SERS substrate

2012 ◽  
Vol 22 (4) ◽  
pp. 1370-1374 ◽  
Author(s):  
Lifang He ◽  
Jianan Huang ◽  
Tingting Xu ◽  
Limiao Chen ◽  
Kui Zhang ◽  
...  
Keyword(s):  
Sers Substrate ◽  
Inverse Opal ◽  
Opal Film ◽  
Highly Active

scholarly journals Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2940
Author(s):  
Bingke Zhang ◽  
Shengwen Fu ◽  
Dongbo Wang ◽  
Shujie Jiao ◽  
Zhi Zeng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Band Structure ◽  
Energy Band ◽  
Organic Pollutant ◽  
Molecular Vibration ◽  
Redox Potentials ◽  
Highly Active ◽  
Band Position ◽  
Carrier Separation ◽  
Solvothermal Methods

The photocatalysis technique has been proven to be a promising method to solve environmental pollution in situations of energy shortage, and has been intensively investigated in the field of pollutant degradation. In this work, a band structure-controlled solid solution of BiOBrXI1−X (x = 0.00, 0.05, 0.10, 0.15, 0.20, 1.00) with highly efficient light-driven photocatalytic activities was successfully synthesized via simple solvothermal methods. The phase composition, crystal structure, morphology, internal molecular vibration, optical properties, and energy band structure were characterized and analyzed by XRD, SEM, HRTEM, XPS, Raman, and UV Vis DRS. To evaluate the photocatalytic activity of BiOBrXI1−X, rhodamine B was selected as an organic pollutant. In particular, BiOBr0.15I0.85 displayed significantly enhanced photocatalytic activity by virtue of modulating the energy band position, optimizing redox potentials, and accelerating carrier separation. Moreover, the enhancement mechanism was elucidated on the basis of band structure engineering, which provides ideas for the design of highly active photocatalysts for practical application in the fields of environmental issues and energy conservation.

Magnetic Nanoscaled Fe3O4 as an Efficient and Reusable Heterogeneous Catalyst for Degradation of Methyl Orange in Microwave-Enhanced Fenton-Like System

2013 ◽  
Vol 448-453 ◽  
pp. 830-833 ◽  
Author(s):  
Dong Bai ◽  
Peng Yan
Keyword(s):  
Methyl Orange ◽  
Microwave Irradiation ◽  
Reaction Temperature ◽  
Heterogeneous Catalysts ◽  
Removal Rate ◽  
Organic Pollutant ◽  
Pollutant Removal ◽  
Magnetic Nanomaterials ◽  
Highly Active ◽  
Degradation Of Methyl Orange

In this study, the Fe3O4magnetic nanoparticles (MNPs) were synthesized as heterogeneous catalysts to effectively degrade methyl orange. The coulping method of microwave irradiation and Fenton-like reaction was used for degradation of methyl orange waste water. The effects of Fe3O4dosage, initial H2O2concentration, catalyst cycles, reaction temperature and so on were assessed systematically. The experimental results showed that the microwave-assisted Fenton-like process using H2O2/Fe3O4was the most effective treatment process compared with other traditional methods. According to degradation of methyl orange, it has been found that the oxidation by Fenton-likes reagent is dependent on Fe3O4dosage, H2O2dosage, reaction temperature. The results indicate that under the optimal conditions, the removal rate of methyl orange could reach nearly 100%. Moreover, six cyclic tests for methyl orange degradation showed that the magnetic catalyst was very stable, recoverable, highly active, and easy to separate using an external magnet. Hence, the coulping method of microwave irradiation and Fenton-like reaction with magnetic nanomaterials of Fe3O4as the catalyst has potential use in organic pollutant removal.

Microwave-Enhanced Fenton-Like System, Fe3O4/H2O2 for Rhodamine B Wastewater Degradation

2013 ◽  
Vol 448-453 ◽  
pp. 834-837
Author(s):  
Peng Yan ◽  
Lin Bo Gao ◽  
Wei Tao Li
Keyword(s):  
Rhodamine B ◽  
Treatment Time ◽  
Iron Catalyst ◽  
Organic Pollutant ◽  
Pollutant Removal ◽  
Magnetic Nanomaterials ◽  
Environmental Concerns ◽  
Operational Parameters ◽  
Highly Active ◽  
Potential Use

Fenton reactions have been increasingly applied to emergent pollutants degradation. Although homogeneous reaction by classical Fenton enables organic wastewater degradation, long treatment time and high iron catalyst concentrations are needed, raising environmental concerns. This paper proposed an innovative and cheap solution to degrade Rhodamine B (RmB) by combining magnetic nanomaterials of Fe3O4as the catalyst with microwave-enhanced fenton-like system. The main operational parameters were optimized systematically (hydrogen peroxide concentration; Fe3O4dosage; catalyst cycles; reaction time and reaction temperature). The degradation rate of Rhodamine B was increased and accelerated due to the assistance of microwave irradiation, with value of 99% after heated for only 5 min, even higher than that of treated by traditional Fenton process for 20 min. Moreover, six cyclic tests for Rhodamine B degradation showed that the magnetic catalyst was very stable, recoverable, highly active, and easy to separate using an external magnet. Hence, microwave-enhanced Fenton-like system with magnetic nanomaterials of Fe3O4as the catalyst has potential use in organic pollutant removal.

Quantitative Freeze Fracture Studies of Gap Junctions in Somatic Cell Hybrids, Their Parents, and Revertants

1976 ◽  
Vol 34 ◽  
pp. 218-219
Author(s):  
W. J. Larsen ◽  
R. Azarnia ◽  
W. R. Loewenstein
Keyword(s):  
Gap Junctions ◽  
Striated Muscle ◽  
Freeze Fracture ◽  
Cell Movement ◽  
Dye Molecules ◽  
Somatic Cell Hybrids ◽  
Cell Coupling ◽  
Normal Cells ◽  
Mediate Cell ◽  
Almost All

Although the physiological significance of the gap junction remains unspecified, these membrane specializations are now recognized as common to almost all normal cells (excluding adult striated muscle and some nerve cells) and are found in organisms ranging from the coelenterates to man. Since it appears likely that these structures mediate the cell-to-cell movement of ions and small dye molecules in some electrical tissues, we undertook this study with the objective of determining whether gap junctions in inexcitable tissues also mediate cell-to-cell coupling.To test this hypothesis, a coupling, human Lesh-Nyhan (LN) cell was fused with a non-coupling, mouse cl-1D cell, and the hybrids, revertants, and parental cells were analysed for coupling with respect both to ions and fluorescein and for membrane junctions with the freeze fracture technique.

Effect of pomegranate fruit supplementation on performance and various markers in athletes and active subjects: a systematic review

2019 ◽  
pp. 1-15
Author(s):  
Alicja Urbaniak ◽  
Anna Skarpańska-Stejnborn
Keyword(s):  
Vessel Diameter ◽  
Whole Body ◽  
Double Blind Study ◽  
Double Blind ◽  
Physically Active ◽  
Highly Active ◽  
Body Strength ◽  
Rate Of Increase ◽  
Study Designs ◽  
Pomegranate Fruit

Abstract. The aim of the study was to review recent findings on the use of POM supplements in athletes of various disciplines and physically active participants. Eleven articles published between 2010 and 2018 were included, where the total number of investigated subjects was 176. Male participants constituted the majority of the group (n = 155), as compared to females (n = 21). 45% of research described was conducted on athletes, whereas the remaining studies were based on highly active participants. Randomised, crossover, double-blind study designs constituted the majority of the experimental designs used. POM supplementation varied in terms of form (pills/juice), dosage (50 ml–500 ml) and time of intervention (7 days–2 months) between studies. Among the reviewed articles, POM supplementation had an effect on the improvement of the following: whole body strength; feeling of vitality; acute and delayed muscle fatigue and soreness; increase in vessel diameter; blood flow and serum level of TAC; reduction in the rate of increase for HR, SBP, CK and LDH; support in the recovery of post-training CK, LDH, CRP and ASAT to their baseline levels; reduction of MMP2, MMP9, hsCRP and MDA; and increased activity of antioxidant enzymes (glutathione peroxidase and superoxide dismutase). In the majority of reviewed articles POM supplementation had a positive effect on a variety of parameters studied and the authors recommended it as a supplement for athletes and physically active bodies.

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