Synthesis and Photocatalytic Performance of Hierarchical Porous Titanium Phosphonate Hybrid Materials

2010 ◽  
Vol 132 ◽  
pp. 87-95 ◽  
Author(s):  
Tian Yi Ma ◽  
Tie Zhen Ren ◽  
Zhong Yong Yuan
Keyword(s):  
Photocatalytic Performance ◽  
Porous Titanium ◽  
Bet Surface Area ◽  
Tetrabutyl Titanate ◽  
Diphosphonic Acid ◽  
Organic Hybrid ◽  
Hierarchical Porous ◽  
Hybrid Framework ◽  
Ft Ir ◽  
Surfactant Assisted

A hierarchical meso-/macroporous titanium phosphonate (TPPH) hybrid material was prepared via a simple surfactant-assisted process with the use of the precursor tetrabutyl titanate and 1-hydroxy ethylidene-1,1-diphosphonic acid. The prepared hybrid TPPH presented amorphous phase, exhibiting a hierarchical macroporous structure composed of mesopores with a pore size of 2.0 nm. The BET surface area is 256 m2/g. The hydroxyethylidene-bridged organophosphonate groups were homogeneously incorporated in the network of the hierarchical porous solid, as revealed by FT-IR, MAS NMR, XPS, and TGA measurements. The optical properties and photocatalytic activity of the hierarchical TPPH material were investigated in comparison with those of hierarchical porous titanium phosphate and pure mesoporous titania materials, showing superiority of the inorganic-organic hybrid framework, suggesting promising photocatalysts for wastewater cleanup.

Synthesis of Ag/ZnO Nanocomposite with Excellent Photocatalytic Performance via a Facile Sol-Gel Method

2014 ◽  
Vol 875-877 ◽  
pp. 251-256 ◽  
Author(s):  
Lin Sun ◽  
Rong Shao ◽  
Lan Qin Tang ◽  
Zhi Dong Chen
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Calcination Temperature ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ft Ir

Ag/ZnO nanocomposite photocatalysts with high photocatalytic performance were successfully synthesized via a facile sol-gel method. The prepared Ag/ZnO products were characterized by XRD, SEM, EDS, FT-IR, BET surface area, TG and DSC. Photodegradation experiments of the samples were carried out by choosing Methylene Blue (MB) as a model target under UV irradiation with homemade photocatalytic apparatus. Among these products, when the molar ratio of Ag to ZnO was fixed at 0.07 and the calcination temperature was around 450 °C, the obtained samples exhibited the highest photocatalytic activity.

Preparation of Y2Ti2O7 Nanocrystal by Sol-Gel Method and its Characterization

2010 ◽  
Vol 97-101 ◽  
pp. 2175-2179 ◽  
Author(s):  
Zhong Sheng Chen ◽  
Wei Ping Gong ◽  
Teng Fei Chen ◽  
Guo Xuan Xiong ◽  
Guo Lin Huang
Keyword(s):  
Citric Acid ◽  
Solid State ◽  
Sol Gel ◽  
Bet Surface Area ◽  
Tetrabutyl Titanate ◽  
Preparation Process ◽  
Excellent Activity ◽  
Dta Analysis ◽  
Ft Ir ◽  
Average Size

Y2Ti2O7 nanocrystals have been prepared at the calcining temperature of 700-900°C by using tetrabutyl titanate as starting materials and citric acid as chelator. The preparation process was monitored by XRD, FT-IR and TG-DTA analysis. Compared with traditional solid state reaction (SSR), the present used methods can prepare can Y2Ti2O7 nanocrystals at a relatively low temperature (750°C) and with shortened reaction time (dwelling time of 1 h). The morphology and averge size of as-prepared products were analysized by FESEM. Results showed that the as-prepared Y2Ti2O7 with good dispersibility and narrow size-distritution were all sphere-like; the average size was about 40-50 nm, Also, the obtained products had higher BET surface area (32 m2/g). These properties are very helpful for a photocatalytic catalyst to achieve excellent activity.

Preparation and Photocatalytic Properties of Nano Ni/TiO2 Composite in Alginate

2012 ◽  
Vol 531-532 ◽  
pp. 539-542
Author(s):  
Hai Feng Chen ◽  
Ting Yan
Keyword(s):  
Photocatalytic Performance ◽  
Sol Gel ◽  
Catalytic Efficiency ◽  
Inorganic Materials ◽  
Molar Ratio ◽  
Tetrabutyl Titanate ◽  
Doping Amount ◽  
Illumination Time ◽  
Ft Ir ◽  
Nano Nickel

New nano nickel-doped titanium dioxide composites had been produced by a conducting sol-gel method. The alginate gel was used as a template to prevent the conglomeration of the inorganic materials. In this experiment, nickel nitrate, tetrabutyl titanate and sodium alginate were used as main materials to prepare different amount nickel-doped TiO2 particles. The amount of Ni was studied from 0 to 9 mol.-% (where mol.-% refers to the Ni/TiO2 molar ratio), and the Ni/TiO2 composites were characterized by XRD, FT-IR, TG-DTA, and we carried out doping amount, catalyst amount and illumination time influence on photocatalytic performance of nano Ni/TiO2 composite in aqueous methyl orange. The activity of TiO2 gradually increased with the increasing of doping amount, and there was highest catalytic efficiency when Ni = 9 % mol.

scholarly journals Porous Titanium Dioxide Spheres for Drug Delivery and Sustained Release

2021 ◽  
Vol 8 ◽  
Author(s):  
Xin-gang Cui ◽  
Hua Chen ◽  
Qing-bang Ye ◽  
Xin-yu Cui ◽  
Xiao-jing Cui ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Drug Release ◽  
Drug Carrier ◽  
Textural Properties ◽  
Porous Titanium ◽  
High Specific Surface Area ◽  
Tetrabutyl Titanate ◽  
Transmission Electron ◽  
Ft Ir ◽  
Adsorption Desorption

By hydrothermal method, porous TiO2 spheres with pompon morphology are successfully synthesized in the tetrabutyl titanate (TBT)–acetic acid (HAc) system with no other additives. The morphological, structural and textural properties of the specimen are figured out by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray powder diffraction (XRD), N2 adsorption/desorption, and fluorescence microscope. The results show the pompon-like morphology of porous TiO2 with high specific surface area and large pore volume, which can be used as a drug carrier. In this paper, doxorubicin hydrochloride (DOX) is chosen as drug model to understand the process of drug release. And results indicate that the porous TiO2 is biocompatible and can be used for continuing drug-release, which shows lots of possibilities in medical fields.

Influence of surfactant-assisted synthesis and different operational parameters on photocatalytic performance of Cu2FeSnS4 particles

2021 ◽  
Vol 24 ◽  
pp. 101134
Author(s):  
Akmal Abbas ◽  
Keyan Li ◽  
Xinwen Guo ◽  
Aimin Wu ◽  
Chunshan Song ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Operational Parameters ◽  
Surfactant Assisted

A series of porous 3D inorganic–organic hybrid framework crystalline materials based on 5-aminoisophthalic acid for photocatalytic degradation of crystal violet

2021 ◽  
Vol 45 (7) ◽  
pp. 3432-3440
Author(s):  
Yu Xin ◽  
Jun Zhou ◽  
Yong Heng Xing ◽  
Feng Ying Bai ◽  
Li Xian Sun
Keyword(s):  
Photocatalytic Degradation ◽  
Crystal Violet ◽  
Metal Organic Frameworks ◽  
Synthetic Method ◽  
Crystalline Materials ◽  
Organic Hybrid ◽  
Hybrid Framework ◽  
Metal Organic ◽  
Degradation Properties

Seven 3D metal-organic frameworks have been designed and synthesized by the hydrothermal synthetic method based on the ligand 5-aminoisophthalic acid. Complexes 1-4 have better photocatalytic degradation properties for dyes CV.

Facile Synthesis of Hierarchical Porous TiO2Ceramics with Enhanced Photocatalytic Performance for Micropolluted Pesticide Degradation

2014 ◽  
Vol 6 (19) ◽  
pp. 16653-16660 ◽  
Author(s):  
Zipeng Xing ◽  
Wei Zhou ◽  
Fan Du ◽  
Linlin Zhang ◽  
Zhenzi Li ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Facile Synthesis ◽  
Pesticide Degradation ◽  
Hierarchical Porous

scholarly journals A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides

2020 ◽  
Vol 9 (2) ◽  
pp. 108-116
Author(s):  
Tarmizi Taher ◽  
◽  
Nyanyu Ummu Hani ◽  
Neza Rahayu Palapa ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Experimental Data ◽  
Surface Area ◽  
Adsorption Kinetics ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Adsorption Process ◽  
Bet Surface Area ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Double Hydroxides

In this work, two synthetic layered double hydroxides (LDH) consists of Zn2+ as M2+ cation with different M3+ cation, i.e., Al3+ and Cr3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO32- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.

Preparation and Photocatalytic Properties of Rod-Shaped TiO2 Based on Salix Fiber

2014 ◽  
Vol 609-610 ◽  
pp. 250-254
Author(s):  
Ya Bin Li ◽  
Jin Tian Huang ◽  
Yan Fei Pan
Keyword(s):  
Photocatalytic Performance ◽  
Sol Gel ◽  
Average Diameter ◽  
X Ray Diffraction ◽  
Nanocomposite Structure ◽  
X Ray ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

In the paper, the TiO2nanomaterials adopted the microcrystalline cellulose as the template by the template method and sol-gel method was prepared. Through the infrared spectrometer (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD), the surface morphology, composition and the type of the samples were characterized respectively. The influence of the macro morphology of TiO2photocatalytic performance to use the reaction of decolorization and degradation of methyl orange as model was analyzed. The results showed that TiO2which was produced by the template of sallix fiber was Rod-shaped and the average diameter size of nanocomposite structure was 20.592 nm, which can provide a new method of producing other morphology of TiO2.

scholarly journals Enhanced Phenol Tert-Butylation Reaction Activity over Hierarchical Porous Silica-Alumina Materials

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1098
Author(s):  
Ling Xu ◽  
Fan Wang ◽  
Zhi Xiu ◽  
Limei Duan ◽  
Zongrui Liu ◽  
...  
Keyword(s):  
Physical Adsorption ◽  
Porous Silica ◽  
Mesoporous Structure ◽  
Catalytic Performance ◽  
Crystallization Time ◽  
Hydrothermal Conditions ◽  
Transmission Electron ◽  
Hierarchical Porous ◽  
Silica Alumina ◽  
Ft Ir

Hierarchical aluminum-silicon materials have been successfully prepared by mixing pre-crystallization of silica-alumina sol and citric acid under hydrothermal conditions. The influence of pre-crystallization time on the micro-mesoporous structure is studied using Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), N2 physical adsorption, and high-resolution transmission electron microscopy (HRTEM). The catalytic performance of hierarchical silica-alumina material is evaluated by alkylation of phenol with tert-butanol. The results show that the silica-alumina materials with a pre-crystallization time of 16 h show micro-mesoporous structure and excellent catalytic activity.

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