Surface Modification of Low-Dimensional Heterostructured Functional Materials with Dendrimers and their Properties of Organic-Inorganic Nanocomposites

2016 ◽  
Vol 847 ◽  
pp. 299-307
Author(s):  
Bin Guo ◽  
Bo Zhang ◽  
Qin Cong ◽  
Lu Wei Ma ◽  
Xiao Chun He ◽  
...  
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Self Assembly ◽  
Functional Materials ◽  
Energy Materials ◽  
Living Body ◽  
New Energy ◽  
Photo Response ◽  
Low Dimensional ◽  
Film Substrate

Low-dimensional heterostructured functional materials have been widely applied in new energy materials, catalysts, et al. However, to enhance photo-response in visible light and the biocompatibility improvement are still the great challenges faced. And the dendrimers act good roles in transferring the drug and gene, and has good biocompatibility. Self-assembly on the surface of low-dimensional heterostructured functional materials with dendrimers holding-COOH groups was carried out in this paper. The characterizations of the materials were examined by SEM (scanning electron microscopy), XRD (X-ray diffraction), the Fourier-Transform Infrared (FTIR) spectra, ultraviolet-visible spectroscopy (UV-Vis) and so on. The photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. The results indicated that ZnO/CuS modified with dendrimers showed good photo-response to visible light and 808 nm laser, the photo-response properties enhanced greatly by adding some small amount of grapheme oxide. Photocatalytic efficiency was examined by selecting typical organic pollutants, some good results were obtained. The external stimuli driven nanorobots for removal the organic pollutants or toxins in the living body have been developed.

Organic Functionalization and Properties of ZnO Nanosheets with Polymer Containing N-Vinyl Carbazole

2017 ◽  
Vol 898 ◽  
pp. 2118-2127
Author(s):  
Lin Bian ◽  
Shi Sheng Lv ◽  
Jian Xun Qiu ◽  
Xin Tao Zhang ◽  
Ming Jun Gao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Visible Light ◽  
Organic Pollutants ◽  
Self Assembly ◽  
Ultra Violet ◽  
Functional Materials ◽  
Organic Electronic Devices ◽  
Zno Nanosheets ◽  
Film Substrate ◽  
Charge Transfer Materials

To make full use of the visible light more effectively, many studies are focuses on ZnO baesd nanocomposites. To modify the surface of ZnO with functional polymer is a very simple and effective approach. PVK (N-vinyl carbazole polymer) is one of typical organic functional materials, which is generally used as charge transfer materials for the applications of several organic electronic devices. Surface modification of ZnO nanosheets with polymer containing –COOH and N-vinyl carbazole group was performed with self-assembly process for improving the adsorption to visible light and properties of charge transfer in nanoscale. A series of characterizations were carried out by SEM (scanning electron microscopy), Fourier-Transform Infrared (FTIR) spectra, UV-Vis (Ultra-violet visible spectroscopy), et al. The adsorption of the nanocomposite was extended to the region of visible light. The photoconductivity response to weak visible light was studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate with casting method. The photocurrent of ZnO nanosheets modified with the polymer containing N-vinyl carbazole to weak visible light was changed greatly. The organic-inorganic nanocomposite showed good activities to visible light, with which it can be easily produced photo-induced charges, avoiding the recombination of charges produced by visible light. Photocatalytic efficiency was examined by selecting typical organic pollutants and some good results were obtained, showing much prospect in the fields of photocatalysts, nanoreactors, self-cleaning films, coatings, and organic pollutants treatment of environmental.

NIR (Near-Infrared) Driven Carbon Nanotube Modified with Dendrimers

2016 ◽  
Vol 848 ◽  
pp. 551-556 ◽  
Author(s):  
Ming Jun Gao ◽  
Bin Guo ◽  
Lu Wei Ma ◽  
Bo Zhang ◽  
Xiao Chun He ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotube ◽  
Visible Light ◽  
Organic Pollutants ◽  
Self Assembly ◽  
Near Infrared ◽  
Living Body ◽  
Stimuli Response ◽  
Film Substrate ◽  
External Stimuli

Dendrimers and carbon nanotube took an important role in transport and delivery of drugs, gene, et al, however, to improve its functional properties is still a great challenge. Carbon nanotube not only has good biocompatibility but also hold optical adsorption in NIR. In biomimetic and biomedical fields, nanorobots or nanocarriers with external stimuli response for removal the organic pollutants and toxins or drugs in the living body are attractive for research and applications. In this paper, the self-assembly with CNTs containing –COOH and dendrimers having –NH2 groups was carried out. A series of characterizations were performed by SEM (scanning electron microscopy), TEM (transmission electron microscopy), XRD (X-ray diffraction), and Fourier-Transform Infrared (FTIR) spectra. The adsorption properties and releasing characteristics of CNTs modified with dendrimers were performed with simulating drugs. Some meaningful results were obtained. The photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET(polyethylene terephthalate) film substrate. The results indicated that CNTs modified with dendrimers showed good photo-response to visible light and 808 nm laser. It would be developing smart nanorobots with external stimuli response for removal the organic pollutants and toxins or drugs in the living body.

Charge Behavior of Low-Dimensional V2O5/Graphene Nanoribbons Oxides Nanocomposites under Irradiation of Visible Light and its Application

2016 ◽  
Vol 847 ◽  
pp. 203-210
Author(s):  
Bo Zhang ◽  
Jing Zheng ◽  
Lu Wei Ma ◽  
Bin Guo ◽  
Xiao Chun He ◽  
...  
Keyword(s):  
Low Power ◽  
Visible Light ◽  
Organic Pollutants ◽  
Graphene Nanoribbons ◽  
Lithium Ion ◽  
Photo Catalysis ◽  
Interdigital Electrodes ◽  
Key Issues ◽  
Low Dimensional ◽  
Film Substrate

Due to its outstanding photo-catalysis properties, low-dimensional V2O5 has many important applications in lithium ion batteries, supercapacitors, electrochromic devices, photocatalysts, sensors, et al. As good photocatalysts for organic pollutants, some key issues of photocatalysts are charge generation, separation, transfer of nanocomposites under irradiation of visible light. To improve their important properties and pave the effective conductive channels for charge transfer and separation, low-dimensional V2O5/graphene nanoribbons nanocomposites were prepared. The emphasis is put on adsorption response to VOC of nanocomposite based on the QCM (quartz crystal microbalance) device. In order to investigate the mechanism of charge-generated by visible light, the photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. Some good results were obtained. This illustrates that this nanocomposite can easily produce the charge-generate with visible light and 808 nm laser with low-power, avoiding the recombination of charge-generate by light. It would be good applications in remove the organic pollutants with photocatalysis effects.

Two-Dimensional Composite Biomimetic Films with Wide Optical Spectrum Response and their Properties

2016 ◽  
Vol 848 ◽  
pp. 57-63
Author(s):  
Xiao Chun He ◽  
Lin Bian ◽  
Bo Zhang ◽  
Lu Wei Ma ◽  
Bin Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Organic Pollutants ◽  
Nanocomposite Film ◽  
Near Infrared ◽  
Low Cost ◽  
Biomimetic Materials ◽  
Laminated Structure ◽  
Energy Devices ◽  
Film Substrate

Since graphene was discovered, the biomimetic materials with laminated structure (such as, shellfish) had become one of the research-hot fields. Chitosan comes from shellfish, and was considered as a very promising abundant natural biopolymer. It holds not only outstanding mechanical properties, film-forming technology and low cost, but also has good applications in environmental fields due to its excellent adsorption properties to a broad range of organic pollutants and some heavy metal ions. Preparation of biomimetic materials with laminated structure utilizing chitosan have many advantages, however, to improve functional properties of chitosan based biomimetic materials is still a great challenge. Graphene has various applications, including storage energy devices, hydrogen production with photo-catalysts, and environmental fields because of its high charge mobility and good mechanical properties. However, graphene and its oxide have difficult re-dispersion properties in fabrication of nanocomposite. In this paper, the nanosheets stacking of metal oxide and grapheme oxide with aid of chitosan was carried out. Several characterizations were examined by SEM (scanning electron microscopy), XRD (X-ray diffraction), ultraviolet-visible spectroscopy (UV-Vis), and Fourier-Transform Infrared (FTIR) spectra. Photocatalytic tests were examined by selecting typical organic pollutants. The photoconductivity response of nanocomposite film to visible light and 808 nm laser with low-power were investigated based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. The results indicated that the organic-inorganic film not only had wide visible light and NIR (near-infrared) responses, but also had good removal ability to organic pollutants. The nanocomposite film also exhibited clearly photo-response to visible light and 808 nm laser. It would be potential good applications in self-cleaning film, nanocoating, et al.

scholarly journals The Analysis of the Characteristic Development of Material Chemistry Specialty under the Background of "Big Materials"

2019 ◽  
Vol 3 (3) ◽  
pp. 172
Author(s):  
Zegong Zhang
Keyword(s):  
Material Science ◽  
Rapid Development ◽  
Functional Materials ◽  
New Materials ◽  
Energy Materials ◽  
Chemistry Major ◽  
Material Chemistry ◽  
Nanometer Materials ◽  
New Energy ◽  
Teaching Purpose

<p>With the rapid development of science and technology, the material discipline also developed rapidly, and gradually developed a lot of new materials. With the emergence of new materials, there are many specialties such as nanometer materials and technology, functional materials, new energy materials and devices. The material chemistry major is a kind of material and chemistry cross traditional major. The teaching purpose of material chemistry major is to improve students' knowledge and skills in material chemistry, so that they can carry out scientific research, teaching, development and other management work in engineering, material science and other related industries, and become an innovative talent in the field of material science. At present, in the environment of rapid development of large materials, the most prominent problem of material chemistry major is how to highlight the specialty characteristics as much as possible in this environment, so as to realize the construction and development of specialty characteristics.</p>

Self-assembly Z-scheme heterostructured photocatalyst of Ag2O@Ag-modified bismuth vanadate for efficient photocatalytic degradation of single and dual organic pollutants under visible light irradiation

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60291-60307 ◽  
Author(s):  
Qi Yang ◽  
Fei Chen ◽  
Xiaoming Li ◽  
Dongbo Wang ◽  
Yu Zhong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Organic Pollutants ◽  
Visible Light Irradiation ◽  
Self Assembly ◽  
Simple Synthesis ◽  
Photoelectric Properties ◽  
Photocatalytic Activities ◽  
Promising Application

Simple synthesis, high photocatalytic activities, preferable photoelectric properties and a promising application in wastewater treatment.

Surface Modification of Graphene Oxide with Pyrene Derivatives and their Photo-Switching Behaviors

2017 ◽  
Vol 898 ◽  
pp. 1739-1748 ◽  
Author(s):  
Shi Sheng Lv ◽  
Lin Bian ◽  
Jian Xun Qiu ◽  
Xin Tao Zhang ◽  
Ming Jun Gao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Visible Light ◽  
Ultra Violet ◽  
Functional Materials ◽  
Switching Behavior ◽  
Surface Chemical ◽  
Pyrene Derivatives ◽  
Film Substrate ◽  
Chemical Groups

The characteristics of surface and interface of nanocomposites are favor for exerting some functional properties and widening new applications. Some low-dimensional materials generally have abundant chemical groups and reaction activities. These surface chemical groups of nanomaterials provide a large platform to develop new nanocomposites and applications by surface chemical reaction and surface reconstruction of another kind of materials. Among so many hot-fields materials, graphene and its nanocomposite are developed rapidly. The graphene oxide not only has good charge transferring property, but also has abundant chemical groups on its surface, such as, -COOH, -OH and epoxide group. Therefore, graphene oxide is a good candidate substrate for further constructing other functional materials in nanoscale. The graphene oxide and pyrene derivatives were selected as representative materials for studies. Assembly of pyrene containing –NH2 groups on the surface of graphene oxide was carried out. A series of characterizations were performed by SEM (scanning electron microscopy), TEM (transmission electron microscopy), the FTIR (Fourier-Transform Infrared ) spectra, The UV-Vis (Ultra-violet visible spectroscopy), photoluminescence spectra, et al. The results indicated that the UV-Vis of nanocomposite was almost covered the whole region of visible light, and the results of PL showed strong fluorescence quenching. There was strong interaction between the graphene oxide and pyrene. The photoconductivity response to weak visible light and 808 nm laser were studied based on interdigital electrodes of Au on flexible PET(polyethylene terephthalate) film substrate with casting method. The results showed that graphene oxide modified with pyrene derivatives exhibited that the photocurrent increased obviously to visible light, and photoresponse to weak 808 nm laser emerged photo-switching behavior. It would be developed the light detector to NIR, biomimetic fields or external stimuli driven nanocarriers for biomedical fields, et al.

Unique Functional Materials Derived from β-Amino Acid Oligomers

2017 ◽  
Vol 70 (2) ◽  
pp. 126 ◽  
Author(s):  
Mark P. Del Borgo ◽  
Ketav Kulkarni ◽  
Marie-Isabel Aguilar
Keyword(s):  
Amino Acid ◽  
Drug Design ◽  
Self Assembly ◽  
Functional Materials ◽  
Bioactive Molecules ◽  
Peptide Drug ◽  
New Materials ◽  
Amino Acid Oligomers

The unique structures formed by β-amino acid oligomers, or β-peptide foldamers, have been studied for almost two decades, which has led to the discovery of several distinctive structures and bioactive molecules. Recently, this area of research has expanded from conventional peptide drug design to the formation of assemblies and nanomaterials by peptide self-assembly. The unique structures formed by β-peptides give rise to a set of new materials with altered properties that differ from conventional peptide-based materials; such new materials may be useful in several bio- and nanomaterial applications.

Electrospun-based TiO2 nanofibers for organic pollutant photodegradation: a comprehensive review

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Khee Chung Hui ◽  
Hazwani Suhaimi ◽  
Nonni Soraya Sambudi
Keyword(s):  
Visible Light ◽  
Organic Pollutants ◽  
Organic Pollutant ◽  
Hollow Fibers ◽  
Promising Alternative ◽  
Tio2 Nanofibers ◽  
As Doping ◽  
Secondary Pollutants ◽  
Photocatalytic Reactors ◽  
Light Area

Abstract Titanium dioxide (TiO2) is commonly used as a photocatalyst in the removal of organic pollutants. However, weaknesses of TiO2 such as fast charge recombination and low visible light usage limit its industrial application. Furthermore, photocatalysts that are lost during the treatment of pollutants create the problem of secondary pollutants. Electrospun-based TiO2 fiber is a promising alternative to immobilize TiO2 and to improve its performance in photodegradation. Some strategies have been employed in fabricating the photocatalytic fibers by producing hollow fibers, porous fibers, composite TiO2 with magnetic materials, graphene oxide, as well as doping TiO2 with metal. The modification of TiO2 can improve the absorption of TiO2 to the visible light area, act as an electron acceptor, provide large surface area, and promote the phase transformation of TiO2. The improvement of TiO2 properties can enhance carrier transfer rate which reduces the recombination and promotes the generation of radicals that potentially degrade organic pollutants. The recyclability of fibers, calcination effect, photocatalytic reactors used, operation parameters involved in photodegradation as well as the commercialization potential of TiO2 fibers are also discussed in this review.

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