The Experts below are selected from a list of 45 Experts worldwide ranked by ideXlab platform
Ronn Goei - One of the best experts on this subject based on the ideXlab platform.
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ag decorated tio2 photocatalytic membrane with hierarchical architecture photocatalytic and anti bacterial activities
Water Research, 2014Co-Authors: Ronn Goei, Teikthye LimAbstract:Abstract Ag-decorated TiO2 (Ag–TiO2) photocatalytic membranes have been fabricated by using Pluronic P-123 as a pore-forming and structure-directing agent. Six different hierarchical architectures were obtained by multilayer coating of different Ag–TiO2 sols. The porous structure of the resulting layers could be fine-tuned by altering the amounts of P-123 and AgNO3 added during the preparation of TiO2 sols. Physico-chemical and morphological properties of different Ag–TiO2 layers were thoroughly investigated. Ag nanoparticles were successfully incorporated into the TiO2 matrix. The Ag–TiO2 membranes possessed multi-functionality of membrane retention, Ag-enhanced TiO2 photocatalytic activity and anti-bacterial action. They were evaluated through experiments using a batch reactor and a photocatalytic membrane reactor (PMR). The best performing membrane was able to remove up to 1007 mg m−2 h−1 of Rhodamine B in the PMR. Two phenomena (photocatalytic degradation and adsorptive-membrane retention) that were responsible for the RhB removal were evaluated. In the batch reactor operated in dark, the membranes were able to remove greater than 5-logs of Escherichia coli. The membrane with the highest percentage of Ag incorporated was able to remove close to 7-logs of E. coli when operated in the PMR.
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asymmetric tio2 hybrid photocatalytic ceramic membrane with porosity gradient effect of structure directing agent on the resulting membranes architecture and performances
Ceramics International, 2014Co-Authors: Ronn GoeiAbstract:Abstract Asymmetric TiO 2 hybrid photocatalytic ceramic membranes with porosity gradient have been fabricated via acid-catalyzed sol–gel method. Different structure directing agents (SDAs) i.e. Pluronic P-123, Triton X-100, Tween 20 and Tween 80 were incorporated in the preparation of TiO 2 sol to obtain a porous multilayered TiO 2 coated on the alumina ceramic support. Six different SDA-modified membrane specimens were fabricated. Four of which were coated with the TiO 2 sols prepared using only one type of SDA. The remaining two specimens were fabricated via multilayer coating of different TiO 2 sols prepared using different types of SDAs. Physico-chemical and morphological properties of different TiO 2 layers were thoroughly investigated. The membrane M1 which had the most porous TiO 2 sub-layers showed a high pure water permeability of 155 L m −2 h −1 bar −1 . The membrane showed a relatively high Rhodamine B (RhB) removal of 2997 mg m −2 over 8 h treatment duration in the batch photoreactor, second only to the Pluronic-based TiO 2 membrane (specific RhB removal of 3050 mg m −2 ). All membrane specimens exhibited good performances while operated in the flow-through photocatalytic membrane reactor. Over 91% of RhB removal capability was retained after 4 treatment cycles. All membranes also showed self-cleaning property by retaining >90% of initial flux after 4 treatment cycles. The flexibility of optimizing membrane performances by fine-tuning the porosity gradient configuration of the photocatalytic layer has also been demonstrated.
Teikthye Lim - One of the best experts on this subject based on the ideXlab platform.
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ag decorated tio2 photocatalytic membrane with hierarchical architecture photocatalytic and anti bacterial activities
Water Research, 2014Co-Authors: Ronn Goei, Teikthye LimAbstract:Abstract Ag-decorated TiO2 (Ag–TiO2) photocatalytic membranes have been fabricated by using Pluronic P-123 as a pore-forming and structure-directing agent. Six different hierarchical architectures were obtained by multilayer coating of different Ag–TiO2 sols. The porous structure of the resulting layers could be fine-tuned by altering the amounts of P-123 and AgNO3 added during the preparation of TiO2 sols. Physico-chemical and morphological properties of different Ag–TiO2 layers were thoroughly investigated. Ag nanoparticles were successfully incorporated into the TiO2 matrix. The Ag–TiO2 membranes possessed multi-functionality of membrane retention, Ag-enhanced TiO2 photocatalytic activity and anti-bacterial action. They were evaluated through experiments using a batch reactor and a photocatalytic membrane reactor (PMR). The best performing membrane was able to remove up to 1007 mg m−2 h−1 of Rhodamine B in the PMR. Two phenomena (photocatalytic degradation and adsorptive-membrane retention) that were responsible for the RhB removal were evaluated. In the batch reactor operated in dark, the membranes were able to remove greater than 5-logs of Escherichia coli. The membrane with the highest percentage of Ag incorporated was able to remove close to 7-logs of E. coli when operated in the PMR.
Xiaoling Fang - One of the best experts on this subject based on the ideXlab platform.
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the potential of Pluronic polymeric micelles encapsulated with paclitaxel for the treatment of melanoma using subcutaneous and pulmonary metastatic mice models
Biomaterials, 2011Co-Authors: Wei Zhang, Yanzuo Chen, Xiaoling FangAbstract:The increasing global incidence of malignant melanoma combined with the poor prognosis and low survival rates of patients necessitates the development of new chemotherapeutic strategies. Thus, the objective of this present study was to investigate the therapeutic efficacy of Pluronic polymeric micelles encapsulating paclitaxel (PTX) in both B16F10 melanoma subcutaneous mice model and pulmonary metastatic mice model. Herein, we developed a PTX-loaded polymeric micelles (PF-PTX) consisting of Pluronic P 123 and F127 block copolymers with small particle size (∼25 nm), high encapsulation efficiency (>90%), good stability in lyophilized form and pH-dependent in vitro release. Furthermore, influence of PF-PTX on in vitro cytotoxicity was determined by MTT assay using B16F10 melanoma cell line, while cellular distribution of PF-PTX was detected by confocal microscopy. Additionally, C57BL/6 mice bearing subcutaneous or pulmonary B16F10 melanoma tumors were treated with Taxol or PF-PTX, and antitumor effect was compared. It was found that antitumor efficacy of PF-PTX in both tumor models showed significant tumor growth delay and increased survival. In summary, the simple Pluronic-based nanocarrier could be harnessed for the delivery of anticancer drug to melanoma, with increased therapeutic index.
K S Rajan - One of the best experts on this subject based on the ideXlab platform.
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new hybrid nanofluid containing encapsulated paraffin wax and sand nanoparticles in propylene glycol water mixture potential heat transfer fluid for energy management
Energy Conversion and Management, 2017Co-Authors: S. Manikandan, K S RajanAbstract:Abstract The reduction in specific heat commonly encountered due to the addition of nanoparticles to a heat transfer fluid such as propylene glycol-water mixture, can be overcome by co-dispersing surfactant-encapsulated paraffin wax, leading to formation of a hybrid nanofluid. Experimental investigations have been carried out on the preparation and evaluation of thermophysical properties of a hybrid nanofluid containing Pluronic P-123 encapsulated paraffin wax (70–120 nm diameter, 1–5 wt.%) and sand nanoparticles (1 vol%) in propylene glycol-water mixture. The comparison of results of differential scanning calorimetry of pure paraffin wax and encapsulated paraffin wax revealed encapsulation efficiency of 84.4%. The specific heat of hybrid nanofluids monotonously increased with paraffin wax concentration, with 9.1% enhancement in specific heat for hybrid nanofluid containing 5 wt.% paraffin wax, in comparison to propylene glycol-water mixture. There exists an optimum paraffin wax concentration (1 wt.%) for the hybrid nanofluid at which the combination of various thermophysical properties such as specific heat, thermal conductivity and viscosity are favorable for use as heat transfer fluid. Such a hybrid nanofluid can be used as a substitute for propylene glycol-water mixture in solar thermal systems.
Wei Zhang - One of the best experts on this subject based on the ideXlab platform.
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the potential of Pluronic polymeric micelles encapsulated with paclitaxel for the treatment of melanoma using subcutaneous and pulmonary metastatic mice models
Biomaterials, 2011Co-Authors: Wei Zhang, Yanzuo Chen, Xiaoling FangAbstract:The increasing global incidence of malignant melanoma combined with the poor prognosis and low survival rates of patients necessitates the development of new chemotherapeutic strategies. Thus, the objective of this present study was to investigate the therapeutic efficacy of Pluronic polymeric micelles encapsulating paclitaxel (PTX) in both B16F10 melanoma subcutaneous mice model and pulmonary metastatic mice model. Herein, we developed a PTX-loaded polymeric micelles (PF-PTX) consisting of Pluronic P 123 and F127 block copolymers with small particle size (∼25 nm), high encapsulation efficiency (>90%), good stability in lyophilized form and pH-dependent in vitro release. Furthermore, influence of PF-PTX on in vitro cytotoxicity was determined by MTT assay using B16F10 melanoma cell line, while cellular distribution of PF-PTX was detected by confocal microscopy. Additionally, C57BL/6 mice bearing subcutaneous or pulmonary B16F10 melanoma tumors were treated with Taxol or PF-PTX, and antitumor effect was compared. It was found that antitumor efficacy of PF-PTX in both tumor models showed significant tumor growth delay and increased survival. In summary, the simple Pluronic-based nanocarrier could be harnessed for the delivery of anticancer drug to melanoma, with increased therapeutic index.