检索结果-南通市图书馆

organic dye removal and recycling performances of graphene oxide-coated biopolymer sponge

Progress in Natural Science:Materials International 2022年第5期32卷 634-642页

作者： Thi Sinh Vo Tran Thi Bich Chau Vo School of Mechanical Engineering Sungkyunkwan University Department of Industrial Management Can Tho University

In this study, a biopolymer sponge(PS) with a crosslinked mixture of gelatin-chitosan-poly(vinyl alcohol) was dipped into graphene oxide(GO) solution to form a composite sponge(CS, GO-coated PS) by a combination of simple dip-coating and freeze-drying procedures, as a sponge-like adsorbent in organic dye removal applications.The morphological, chemical, crystalline, mechanical and thermal characterizations of the as-obtained sponges were further investigated for the possible changes in the structure of sponge-like adsorbent after coating the GO sheets on the 3D porous structure of PS. The results showed that the CS had possessed effectively organic dye removal performances comparing to the PS. In the adsorption, the Langmuir and pseudo-second-order models corresponding to a monolayer approach and a chemical adsorption were appropriated. The maximum adsorption capacity of Rhodamine B and Congo red reached 126.8 and 135.0 mg·g-1; and 145.6 and 148.6 mg·g-1corresponding onto the PS and CS. It indicates that the maximum adsorption capacity on the CS enhanced significantly comparing to those on the PS owing to the functional GO sheets coated in the 3D porous structure of PS, which leads to supplying further functional adsorption sides on the whole 3D porous structure of CS. Notably, the sponges-like adsorbents could be regenerated and used again without a remarkable decrease of dye removal ability occurred in 9 adsorbing–desorbing cycles. Therefore, the CS prepared in this study can become a potential adsorbent for actual applications because of non-toxic materials, proper structural features, low-cost material and operation, and reliable recyclability.

关键词： Graphene oxide Biopolymer sponge organic dye Adsorption dye removal Recyclability

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Graphene oxide-covered melamine foam utilizing as a hybrid foam toward organic dye removal and recyclability

引用

Progress in Natural Science:Materials International 2022年第3期32卷 296-303页

作者： Thi Sinh Vo Tran Thi Bich Chau Vo School of Mechanical Engineering Sungkyunkwan University Department of Industrial Management Can Tho University

Graphene-based adsorbents have been attracted extensive interest in recent years. Herein, graphene oxidecovered melamine foam(GO-covered MF) was designed and prepared by a mild submerge-covering method with the support of a super-hydrophilic melamine framework, showing its adsorption performances for various organic dyes. The structure morphology as well as chemical, thermal and mechanical properties of the as-obtained hybrid foam(HF) were further determined for the possible structure changes after covering the GO sheets on the MF framework. Moreover, the HF exhibited an excellent ability for organic dye adsorption application, and which was well fitted in the pseudo-second-order kinetic and Langmuir models corresponding to a chemical adsorption and a mono-layer approach during the adsorption process. The maximum adsorption capacity by using the asobtained HF corresponded to 258.56 mg g-1(methylene blue), 233.22 mg g-1(Rhodamine B), 206.92 mg g-1(methyl orange), and 184.93 mg g-1(Congo red), which are competitive with that of other graphene-based absorbents. In particular, the HF could be reused without a noticeable degradation of organic dye removal performance. As such, the HF prepared in this study can become an encouraging candidate for practical application owing to the reliable recyclability and low-cost.

关键词： Graphene oxide Melamine foam organic dye Adsorption Hybrid foam Recyclability

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Using NH_(2)-MIL-125(Ti)for efficient removal of Cr(Ⅵ)and Rh B from aqueous solutions:Competitive and cooperative behavior in the binary system

引用

Journal of Environmental Sciences 2024年第2期136卷 437-450页

作者： Lei Zheng Lixia Sun Jiangbo Qiu Junling Song Luyi Zou Yue Teng Yongzhong Zong Hongyan Yu School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China Kunming South Water Co. Ltd.Kunming 650501China Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan UniversityWuxi 214122China

The coexistence of inorganic and organic contaminants is a challenge for real-life water treatment applications.Therefore,in this research,we used NH_2-MIL-125(Ti)to evaluate the single adsorption of hexavalent chromium(Cr(Ⅵ))or Rhodamine B(RhB)in an aqueous solution and further investigate simultaneous adsorption experiments to compare the adsorption behavior changes.The main influencing factors,for example,reaction time,initial concentration,reaction temperature,and pH were studied in detail.In all reaction systems,the pseudo-second-order kinetic and Langmuir isotherm models were well illuminated the adsorption progress of Cr(Ⅵ)and RhB.Thermodynamic studies showed that the adsorption process was spontaneous and endothermic.As compared to the single system,the adsorption capacity of Cr(Ⅵ)in the binary system gradually decreased as the additive amount of RhB increased,whereas the adsorption capacity of RhB in the binary system was expanded brilliantly.When the binary reaction system contained 100 mg/L Cr(Ⅵ),the removal rate of RhB increased to 97.58%.The formation of Cr(Ⅵ)-RhB and Cr(Ⅲ)-RhB complexes was the cause that provided facilitation for the adsorption of RhB.These findings prove that the interactions during the water treatment process between contaminants may obtain additional benefits,contributing to a better adsorption capacity of co-existing contaminant.

关键词： Adsorption Heavy metal ion organic dye Simultaneous removal Mechanism studies

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An efficient photocatalytic CO_(2) reduction system improved by emodin as a redox mediator

引用

Green Chemical Engineering 2023年第4期4卷 433-438页

作者： Hua Gao Guoquan Liu Yong Zhu Zhibing Wen Xiao Liu Guan Wang Fei Li State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian116024China

Solar-driven photoreduction of CO_(2)to value-added fuels such as CO,CH_(4),and CH_(3)OH is a promising approach for alleviating the greenhouse effect.Transition-metal-complex molecular catalysts exhibit high catalytic performance for CO_(2)reduction owing to their tunable structures.In this study,we developed an efficient,inexpensive,and noble-metal-free photocatalytic CO_(2)reduction system containing an organic photosensitizer proflavine,a cobalt molecular catalyst,and an organic electron transfer relay emodin in DMF/H_(2)O(DMF:N,N-dimethylformamide)solvent.In the presence of water,a turnover number(TON)of 1333 was achieved for CO_(2)-to-CO conversion under ambient conditions and visible light irradiation,which is a 1.7-fold improvement over the system without emodin.In addition,a high selectivity of 90%was obtained for CO production.Absorption spectroscopy and cyclic voltammetry confirmed the crucial role of emodin in facilitating electron transfer between the photosensitizer and catalyst.We expect that our system will promote the development of an effective homogenous photocatalytic solar-fuel production technology.

关键词： Photocatalysis CO_(2)reduction Electron relay organic dye

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Transpiration-prompted Photocatalytic Degradation of dye Pollutant with AuNPs/PANI Based Cryogels

引用

Chinese Journal of Polymer Science 2022年第10期40卷 1141-1153,I0006,I0005页

作者： Xiao-Xiao Guo Shi-Chang Hou Jun Chen Cong Liao Wei-Dong He CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Incautious discharge of organic dyes such as methyl orange(MO)has produced serious pollution to the environment,calling for the efficient techniques to remove them with retaining the green world.The photo-catalytic degradation of organic dyes is promising among the developed techniques.Thus,a strategy based on transpiration-prompted photocatalytic degradation of dye pollutant under sunlight is put forward.Aniline(ANI)is graft-polymerized onto poly(acrylamide-co-N-4-aminophenylacrylamide)(PAAm)cryogel embedded with gold nanoparticles(AuNPs,diameter:4-10 nm).The obtained cryogels integrated with AuNPs and PANI inside PAAm matrix(AuNP@PAAm-g-PANI)have been structurally explored based on the chemical composition and the phase/porous morphology.SEM and TEM observation shows that PANI and AuNPs are uniformly distributed in PAAm matrix.Since the macro-porosity of cryogel,hydrophilicity of PAAm and photo-thermal activity of PANI,PAAm-g-PANI cryogels without AuNPs can have a photo-thermal evaporation rate of water at 1.63 kg·m^(-2)·h^(-1).As a comparison,Au NP@PAAm-g-PANI cryogels with AuNPs exhibit higher one at 2.20 kg·m^(-2)·h^(-1),suggesting the promotion of AuNPs to photo-thermal evaporation.Meanwhile,PANI appreciatively assists AuNPs to display higher catalytic ability for the oxidative degradation of MO.Therefore,the removal of MO from water is obviously prompted by the water transpiration under sunlight with AuNP@PAAm-g-PANI cryogels,whose rate constant can reach to 0.320 h^(-1),being three folds of that for the sole absorption of MO.This transpiration-prompted photocatalytic degradation provides a fascinating route to eliminate organic pollutants and obtain pure water from wastewater simultaneously with sustainable sunlight energy.

关键词： Photothermal evaporation Photocatalytic degradation Sunlight organic dye Composite cryogel

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Nickel NHC Complex for Visible-Light Driven CO2 Reduction in CH3CN/H2O Solution Assisted by organic dye

A Nickel NHC Complex for Visible-Light Driven CO2 Reduction ...

引用

中国化学会第八届全国配位化学会议

作者： Jinguo Wu Xuezhao Li Tianchi Feng Cheng He State Key Laboratory of Fine Chemicals Dalian University of Technology

Many chemists focused on photocatalytic reduction of CO to one carbon product.The Nickel NHC Complex designed by pervious research showed good solubility and stability in CH CN/H O solution.Electrocatalytic current potential is observed under a CO atmosphere,revealing the complex is a precatalyst for visible-light driven photochemical reduction of CO.Photochemical experiments were performed in a CH CN/H O solvent mixture(1:1 v/v,) containing 5 mM organic dye which replaced noble metal compound like[Ru(bpy)] as a photosensitizer,and 2.0 M TEA as a sacrificial reductant.GC and IC analysis indicated HCOOH was the main product.Trace H and CO was detected.By isotopic C ,the carbon atoms of the product are determined from carbon dioxide.

关键词： Nickel NHC Complex Photocatalytic organic dye CH3CN/H2O Solution

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Removal of Anionic dyes from Aqueous Solution with Layered Cationic Aluminum Oxyhydroxide

引用

Chemical Research in Chinese Universities 2022年第6期38卷 1532-1541页

作者： ZHANG Tianran YU Huacheng WANG Wenkai BAI Pu JIN Keyan ZHANG Jia-Nan YAN Wenfu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012P.R.China Department of Chemistry The University of Hong KongPokfulam RoadHong Kong SARP.R.China Beijing National Laboratory for Molecular Science Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871P.R.China College of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001P.R.China

It is highly desired yet challenged to find an adsorbent with low cost and excellent performance in the removal of organic dyes from aqueous solution. Here we reported that a layered cationic aluminum oxyhydroxide material hydrothermally synthesized from the low-cost source materials of AlCl_(3)·6H_(2)O, CaO and H_(2)O, known as JU-111, can meet such criterion in removing methyl orange(MO) and Congo red(CR). JU-111 shows fast adsorption kinetics[especially for CR(15 s)] and high adsorption capacity(MO: >1000 mg/g;CR: >2900 mg/g), surpassing most of the reported adsorbents. Comprehensive characterizations of the adsorption process of MO and CR revealed that both adsorptions were achieved via the anion exchange process. The characteristics of extremely low cost and excellent performance render JU-111 great potential in the practical applications in the removal of anionic dyes.

关键词： JU-111 Adsorption organic dye Methyl orange Congo red

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photocatalytic degradation of organic dyes with H_3PW_(12)O_(40)/TiO_2-SiO_2

引用

Rare Metals 2016年第10期35卷 797-803页

作者： Shui-Jin Yang Yu-Lin Xu Wen-Peng Gong Yong-Kui Huang Guo-Hong Wang Yun Yang Chuan-Qi Feng Hubei Collaborative Innovation Center for Rare Metal Chemistry College of Chemistry and Chemical EngineeringHubei Normal University College of Chemistry and Chemical Engineering Hubei University

H3PW12O40/TiO2-SiO2 was synthesized by impregnation method which significantly improved the catalytic activity under simulated natural light. The prop- erties of the samples were characterized by Fourier trans- form infrared spectra （FTIR）, X-ray powder diffraction pattern （XRD）, Scanning electron micrographs （SEM）, and Zeta potential. Degradation of methyl violet was used as a probe reaction to explore the influencing factors on the photodegradation reaction. The results show that the opti- mal conditions are as follows： initial concentration of methyl violet of 10 mg·L^-1, pH of 3.0, catalyst dosage of 2.9 g·L^-1, and light irradiation time of 2.5 h. Under these conditions, the degradation rate of methyl violet is 95.4 %. The reaction on photodegradation for methyl violet can be expressed as the first-order kinetic model, and the possible mechanism for the photocatalysis under simulated natural light is suggested. After used continuously for five times, the catalyst keeps the inherent photocatalytic activity for degradation of dyes. The photodegradation of methyl orange, methyl red, naphthol green B, and methylene blue was also tested, and the degradation rate of dyes can reach 81%-100%.

关键词： Heteropoly acid TiO2 SiO2 Photocatalytic degradation organic dye

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THERMOCHROMIC POLYMER MATERIALS

引用

Chinese Journal of Polymer Science 2007年第2期25卷 123-135页

作者： A.Seeboth A.Klukowska R.Ruhmann D.L tzsch Fraunhofer Institute for Applied Polymer Research Volmerstraβe 7B12489 BerlinGermany

Thermochromic polymers will play an extremely important role in the next future. The physical background of thermochromism and the state of development of thermochromic polymers based on light absorption effects are reported. In detail, the interactions between the polymer matrix and the thermochromic composite - composed of leuco or indicator dyes - are discussed on a molecular level. Thermochromic hydrogels with extremely high transparency, an outstanding switching behavior from colorless to colored or between different colors is presented. Preparation of thermosetting and thermoplastic polymers, including the resulting optical, and, for the first time, the mechanical properties are discussed in relation to matrix tuned high-resistant microcapsules.

关键词： Thermochromism Polymer matrix Microcapsule organic dye Mechanical property.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new D–D–π–A dye for efficient dye-sensitized solar cells

引用

Journal of Energy Chemistry 2016年第5期25卷 769-774页

作者： Xiaoqiang Yu Huailing Jiang Yi Wang Yantao Shi Tingli Ma Ming Bao State Key Laboratory of Fine Chemicals Dalian University of Technology Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology

New metal-free organic dye sensitizers containing mono-triphenylamine or bis-triphenylamine as the electron donor, a thiophene as the π-conjugated system, and a cyanoacrylic acid moiety as the electron acceptor were synthesized. The optical and electrochemical properties of the dyes were investigated,and their performance as sensitizers in solar cells was evaluated. dye-sensitized solar cells based on dye containing bis-triphenylamine as the electron donor produced a photon-to-current conversion efficiency of 6.06%（Jsc = 14.21 m A/cm;, Voc = 0.62 V, ff = 0.69） under 100 m W/cm;simulated AM 1.5 G solar irradiation（100 m W/cm;）.

关键词： dye-sensitized solar cells organic dye Bis-triphenylamine Electron donor Photon-to-current conversion efficiency

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：