scholarly journals One-Step Nonaqueous Synthesis of Pure Phase TiO2Nanocrystals from TiCl4in Butanol and Their Photocatalytic Properties

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Tieping Cao ◽  
Yuejun Li ◽  
Changhua Wang ◽  
Changlu Shao ◽  
Yichun Liu
Keyword(s):  
Rhodamine B ◽  
Molar Ratio ◽  
Photocatalytic Activities ◽  
Pure Phase ◽  
High Molar Ratio ◽  
One Step ◽  
Degussa P25 ◽  
Small Crystal Size ◽  
Anatase Nanoparticles ◽  
Nonaqueous Synthesis

Pure phase TiO2nanomaterials were synthesized by an autoclaving treatment of TiCl4with butanol as a single alcohol source. It was found that the control of molar ratio of TiCl4to butanol played an important role in determining the TiO2crystal phase and morphology. A high molar ratio of TiCl4to butanol favored the formation of anatase nanoparticles, whereas rutile nanorods were selectively obtained at a low molar ratio of TiCl4to butanol. Evaluation of the photocatalytic activity of the synthesized TiO2was performed in terms of decomposition of organic dye rhodamine B under ultraviolet irradiation. It turned out that the as-synthesized TiO2crystallites possessed higher photocatalytic activities toward bleaching rhodamine B than Degussa P25, benefiting from theirhigh surface area, small crystal size as well as high crystallinity.

Facile hydrothermal synthesis and electrochemical properties of orthorhombic LiMnO2 cathode materials for rechargeable lithium batteries

RSC Advances ◽  
2014 ◽  
Vol 4 (26) ◽  
pp. 13693-13703 ◽  
Author(s):  
Shulin Chen ◽  
Feifei Cao ◽  
Fan Liu ◽  
Quanjun Xiang ◽  
Xionghan Feng ◽  
...  
Keyword(s):  
Lithium Batteries ◽  
Hydrothermal Reaction ◽  
Molar Ratio ◽  
Cyclic Stability ◽  
Rechargeable Lithium Batteries ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Pure Phase ◽  
One Step ◽  
Orthorhombic Limno2

Pure-phase and aluminum-doped orthorhombic LiMnO2 (o-LiMnO2) samples of high discharge capacity and cyclic stability are prepared by a simple one-step hydrothermal reaction with low Li/Mn molar ratio. Mixing LiMn2O4 and doping aluminum improve the electrochemical performance of o-LiMnO2.

scholarly journals Highly Selective Deethylation of Rhodamine B on Prepared in Supercritical Fluids

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Yuzun Fan ◽  
Guoping Chen ◽  
Dongmei Li ◽  
Yanhong Luo ◽  
Nina Lock ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Supercritical Fluids ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Continuous Flow ◽  
Flow Reactor ◽  
Continuous Flow Reactor ◽  
Pure Phase ◽  
Degussa P25 ◽  
Supercritical Isopropanol

Pure phase anatase TiO2nanoparticles with sizes of 5–8 nm and varying crystallinity were synthesized in supercritical isopropanol/water using a continuous flow reactor. Their photodegradation of rhodamine B (RhB) was evaluated under visible light irradiation. The as-prepared TiO2nanoparticles show much higher photodegradation efficiencies than commercial Degussa P25 TiO2. Moreover, the photodegradation of RhB on the as-prepared TiO2follows a different process from that on P25 TiO2, quicker N-deethylation and slower cleavage of conjugated chromophore structure. Based on PXRD, TEM, and BET measurements, these two photodegradation properties have been explained by the physicochemical properties of TiO2.

Hydrothermal synthesis of BiVO4/Bi2MoO6 composites with enhanced photocatalytic activity

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744059 ◽  
Author(s):  
Chaoqi Xu ◽  
Hongzhi Qian ◽  
Haibo Yong ◽  
Xiaogu Huang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Molar Ratio ◽  
Moderate Amount ◽  
Molar Ratios ◽  
Photocatalytic Activities ◽  
Efficient Charge ◽  
One Step ◽  
Carrier Separation ◽  
The One ◽  
Positive Effect

BiVO4/Bi2MoO6 composites have been fabricated via the one-step hydrothermal method. The properties of composites were tailored by altering the V/Mo molar ratios. Photocatalytic activities were evaluated by measuring degradation of RhB under visible-light irradiation. BiVO4/Bi2MoO6 composites with V/Mo molar ratio of 8:1 possessing the optimal photocatalytic performance. The enhanced photocatalytic activity was attributed to the efficient charge carrier separation of composite heterostructures. In addition, the study of adsorption and photocatalytic activity suggested that a moderate amount of adsorption has a positive effect on photocatalytic reaction.

scholarly journals One-step synthesis of nitrogen-grafted copper-gallic acid for enhanced methylene blue removal

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shella Permatasari Santoso ◽  
Vania Bundjaja ◽  
Artik Elisa Angkawijaya ◽  
Chintya Gunarto ◽  
Alchris Woo Go ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Gallic Acid ◽  
Synthesis Method ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
One Step ◽  
Detailed Assessment ◽  
Higher Temperature

AbstractNitrogen-grafting through the addition of glycine (Gly) was performed on a metal- phenolic network (MPN) of copper (Cu2+) and gallic acid (GA) to increase its adsorption capacity. Herein, we reported a one-step synthesis method of MPN, which was developed according to the metal–ligand complexation principle. The nitrogen grafted CuGA (Ng-CuGA) MPN was obtained by reacting Cu2+, GA, and Gly in an aqueous solution at a molar ratio of 1:1:1 and a pH of 8. Several physicochemical measurements, such as Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), N2 sorption, X-ray diffraction (XRD), and thermal gravimetry analysis (TGA), were done on Ng-CuGA to elucidate its characteristics. The analysis revealed that the Ng-CuGA has non-uniform spherical shaped morphology with a pore volume of 0.56 cc/g, a pore size of 23.25 nm, and thermal stability up to 205 °C. The applicational potential of the Ng-CuGA was determined based on its adsorption capacity against methylene blue (MB). The Ng-CuGA was able to adsorb 190.81 mg MB per g adsorbent at a pH of 6 and temperature of 30 °C, which is 1.53 times higher than the non-grafted CuGA. Detailed assessment of Ng-CuGA adsorption properties revealed their pH- and temperature-dependent nature. The adsorption capacity and affinity were found to decrease at a higher temperature, demonstrating the exothermic adsorption behavior.

Synergistic effect of co-reactant promotes one-step oxidation of cyclohexane into adipic acid catalyzed by manganese porphyrins

2015 ◽  
Vol 93 (7) ◽  
pp. 696-701 ◽  
Author(s):  
Hui Li ◽  
Yuanbin She ◽  
Haiyan Fu ◽  
Meijuan Cao ◽  
Jing Wang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Co Oxidation ◽  
Adipic Acid ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Catalyst Structure ◽  
Manganese Porphyrins ◽  
Co Oxidation Reaction ◽  
One Step ◽  
Acid Catalyzed

The synergistic effect of cyclohexane and cyclohexanone promoted synthesis of adipic acid catalyzed by [MnIIIT(p-Cl)PP]Cl with cyclohexane and cyclohexanone as co-reactants. The results showed that the conversions of cyclohexane and cyclohexanone were significantly enhanced because of the cyclohexanone synergistic effect, and the higher selectivity to adipic acid was obtained with dioxygen as an oxidant. The studies indicated that the co-oxidation of cyclohexane and cyclohexanone was influenced by the initial molar ratio of cyclohexanone and cyclohexane, catalyst structure, catalyst concentrations, and reaction conditions. The preliminary mechanism of the co-oxidation reaction of cyclohexane and cyclohexanone using [MnIIIT(p-Cl)PP]Cl as the catalyst was proposed.

One-step solvothermal preparation of TiO2/C composites and their visible-light photocatalytic activities

2008 ◽  
Vol 254 (13) ◽  
pp. 3762-3766 ◽  
Author(s):  
Ming Li ◽  
Shifeng Zhou ◽  
Yuewei Zhang ◽  
Guangqin Chen ◽  
Zhanglian Hong
Keyword(s):  
Visible Light ◽  
Photocatalytic Activities ◽  
One Step ◽  
Solvothermal Preparation ◽  
Visible Light Photocatalytic

Effects of the molar ratio on the photo-generated charge separation behaviors and photocatalytic activities of (BiO)2CO3-BiOBr composites

2016 ◽  
Vol 60 ◽  
pp. 11-16 ◽  
Author(s):  
Jiufu Chen ◽  
Junbo Zhong ◽  
Jianzhang Li ◽  
Shentian Huang ◽  
Zhen Xiang ◽  
...  
Keyword(s):  
Charge Separation ◽  
Molar Ratio ◽  
Photocatalytic Activities

One-step exfoliation and fluorination of g-C3N4 nanosheets with enhanced photocatalytic activities

2017 ◽  
Vol 41 (8) ◽  
pp. 3061-3067 ◽  
Author(s):  
Fukun Ma ◽  
Changlong Sun ◽  
Yongliang Shao ◽  
Yongzhong Wu ◽  
Baibiao Huang ◽  
...  
Keyword(s):  
Photocatalytic Activities ◽  
One Step

A one-step route for the exfoliation and fluorination of g-C3N4 nanosheets is presented and the F-C3N4 nanosheets show enhanced photocatalytic activities.

Few-Layered MoS2 Nanoparticles Loaded TiO2 Nanosheets with Exposed {001} Facets for Enhanced Photocatalytic Activity

NANO ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. 1850129 ◽  
Author(s):  
Chujun Chen ◽  
Xia Xin ◽  
Jinniu Zhang ◽  
Gang Li ◽  
Yafeng Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Charge Carrier ◽  
Visible Light ◽  
Recombination Rate ◽  
Active Species ◽  
Molar Ratio ◽  
Carrier Recombination ◽  
Tio2 Nanosheets ◽  
Photocatalytic Activities ◽  
Charge Carrier Recombination

To improve the high charge carrier recombination rate and low visible light absorption of {001} facets exposed TiO2 [TiO2(001)] nanosheets, few-layered MoS2 nanoparticles were loaded on the surfaces of TiO2(001) nanosheets by a simple photodeposition method. The photocatalytic activities towards Rhodamine B (RhB) were investigated. The results showed that the MoS2–TiO2(001) nanocomposites exhibited much enhanced photocatalytic activities compared with the pure TiO2(001) nanosheets. At an optimal Mo/Ti molar ratio of 25%, the MoS2–TiO2(001) nanocomposites displayed the highest photocatalytic activity, which took only 30[Formula: see text]min to degrade 50[Formula: see text]mL of RhB (50[Formula: see text]mg/L). The active species in the degradation reaction were determined to be h[Formula: see text] and [Formula: see text]OH according to the free radical trapping experiments. The reduced charge carrier recombination rate, enhanced visible light utilization and increased surface areas contributed to the enhanced photocatalytic performances of the 25% MoS2–TiO2(001) nanocomposites.

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