Enhancing mechanical and photocatalytic performances on TiO2/Ti composite ultrafiltration membranes via Ag doping method

Lin, Yuqing; Cai, Yuanyuan; Drioli, Enrico; Fan, Yiqun

doi:10.1016/j.seppur.2015.02.024

Cited by 23 publications

(12 citation statements)

References 41 publications

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“…6e and 6f, the sizes of the AgNPs and alumina particles were precisely characterized. The sizes of the AgNPs were approximately 5 nm, while the lattice plane spacing was approximately 0.34 nm, consistent with the previous report [28]. An XPS characterization was carried out to analyze the valence states of the AgNPs-doped alumina materials after sintering at 1000 °C for 2 h. Fig.…”

Section: Physicochemical Properties Of the Agnps-doped Al2o3 Materialssupporting

confidence: 85%

“…These studies pave the way for the design and fabrication of highperformance ceramic membrane materials with controllable surface charges. Furthermore, Lin et al [27,28] reported the effect of AgNPs doping on the thermal treatment of ceramic membranes at high temperatures. They fabricated TiO2/Ti composite microfiltration (MF) and UF membranes using AgNPs to alleviate the sintering stress and thermal expansion mismatch between the metal support and TiO2 layer, efficiently preventing membrane cracks in the sintering process.…”

Section: Introductionmentioning

confidence: 99%

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Facile co-sintering process to fabricate sustainable antifouling silver nanoparticles (AgNPs)-enhanced tight ceramic ultrafiltration membranes for protein separation

Zou

Chen

Drioli

et al. 2020

Journal of Membrane Science

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Protein separation in medical care applications using tight ceramic ultrafiltration (UF) membranes with multilayer asymmetric structures is hindered by challenges in their fabrication and fouling phenomenon. In this study, a facile co-sintering method for fabrication of silver nanoparticles (AgNPs)-enhanced tight ceramic ultrafiltration membranes was comprehensively investigated. The introduction of AgNPs into the membrane layer not only controlled the membrane surface charge properties, but also alleviated the sintering stress in the co-sintering process, ensuring a complete membrane layer owing to the higher ductility. The AgNPs obtained from silver nitrate were introduced before the formation of boehmite nucleation, providing a uniform distribution of AgNPs within boehmite owing to the electric double layer. The final UF membranes prepared by the co-sintering process exhibited a molecular weight cut-off of 9000 Da and permeability of 62 Lm -2 h -1 bar -1 . Furthermore, the isoelectric point of the membrane surface could be controlled by the AgNPs (from 9.0 to 2.7 unit?), providing sustainable antifouling properties for protein purification owing to the electrostatic repulsion force. The proposed facile co-sintering process for fabrication of antifouling ceramic UF membranes with the assistance of AgNPs could decrease the sintering time and energy consumption, and thus is promising for industrial protein purification applications.

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Section: Physicochemical Properties Of the Agnps-doped Al2o3 Materialssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Facile co-sintering process to fabricate sustainable antifouling silver nanoparticles (AgNPs)-enhanced tight ceramic ultrafiltration membranes for protein separation

Zou

Chen

Drioli

et al. 2020

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…Optimisation of operating parameters such as permeate flux, pressure, flow rate, pH and temperature leads to maximizing the efficiency of the hybrid system [226]. Introducing cost effective doping techniques to produce ceramics with high electrical conductivities seems to be a promising way for the production of electrode materials with high mechanical resistance which efficiently generate high yields of hydroxyl radicals [252][253][254].…”

Section: Mining Industrymentioning

confidence: 99%

The application of pressure-driven ceramic membrane technology for the treatment of industrial wastewaters – A review

Samaei

Gato-Trinidad

Altaee

2018

Separation and Purification Technology

290

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This paper presents a review of the previous laboratory analysis and case studies on the application of the pressure-driven ceramic membrane technology for treatment of industrial wastewaters. Ceramic membranes has attracted remarkable interests in recent decades for industrial wastewater treatment because of their superior characteristic such as high fluxes , reliable working lifetime under aggressive operating conditions and ease of cleaning. The literature review revealed that the efficiency of this technology has been proven in a wide variety of wastewaters from different industries and activities including pulp and paper, textile, pharmaceutical, petrochemical, food and mining. However, there are still challenges and questions for this technology that need to be addressed in future researches such as investment cost optimisation by introducing new fabrication technologies, selectivity, permeability and packing densities improvement, fouling minimisation and proposing scale up based on experimental research results.

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“…However, corrosion resistance, oxidation resistance, and high temperature resistance restrict their wide applications [13]. Recently, porous Ti material was proposed as a promising support for ceramic membranes based on many advantages, such as high specific surface area, low apparent specific gravity, and high penetration performance [14][15][16]. Lin et al [17] prepared high-permeability TiO 2 membrane on porous Ti support via the facile coating method, the prepared TiO 2 /Ti composite microfiltration (MF) membranes showed the most frequent pore size of 380 nm, and a high pure water permeability of 1150 L m −2 h −1 bar −1 .…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Oxygen Concentration on the Properties of TiO2/Ti Composite Membranes Prepared by In Situ Oxidation

Zhang

et al. 2020

Processes

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TiO2 membranes were prepared on porous Ti supports through the in situ oxidation method. The effects of oxygen concentration, oxidation temperature, and oxidation time on the thickness, pore size, and microstructure of the prepared TiO2 membrane were investigated. The results showed that with increasing oxygen concentration, oxidation temperature, and oxidation time, the thickness of the prepared TiO2 membrane gradually increased, and the pore diameter gradually decreased. The optimum preparation conditions were—oxygen concentration was N2:O2 = 2:1, oxidation temperature was 800 ℃, and oxidation time was 60 min. The prepared TiO2/Ti composite membranes had a flat and smooth surface, uniform thickness, and only a rutile TiO2 characteristic peak formed on the surface of the membrane. The prepared TiO2/Ti composite membrane had a narrow pore size distribution, and the average pore size was about 0.312 μm. In addition, the prepared TiO2/Ti composite membranes showed an excellent stability.

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Enhancing mechanical and photocatalytic performances on TiO2/Ti composite ultrafiltration membranes via Ag doping method

Cited by 23 publications

References 41 publications

Facile co-sintering process to fabricate sustainable antifouling silver nanoparticles (AgNPs)-enhanced tight ceramic ultrafiltration membranes for protein separation

Facile co-sintering process to fabricate sustainable antifouling silver nanoparticles (AgNPs)-enhanced tight ceramic ultrafiltration membranes for protein separation

The application of pressure-driven ceramic membrane technology for the treatment of industrial wastewaters – A review

Study on the Effect of Oxygen Concentration on the Properties of TiO2/Ti Composite Membranes Prepared by In Situ Oxidation

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