Enhanced photocatalytic degradation of organic dyes by ultrasonic-assisted electrospray TiO2/graphene oxide on polyacrylonitrile/β-cyclodextrin nanofibrous membranes

Zhang, Rong; Ma, Yanlan; Lan, Wenting; Sameen, Dur E.; Ahmed, Saeed; Dai, Jianwu; Qin, Wen; Li, Suqing; Liu, Yaowen

doi:10.1016/j.ultsonch.2020.105343

Cited by 91 publications

(33 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As evidenced from XRD diffractograms in Figure 4, CA substrate presents an amorphous halo at 2θ = 7.2° and rGO filtration membranes have peaks at 2θ = 7.8° and 8.2°, which were related to (002) crystal plane of GO [17][18][19]. Figure 5 reveals the Raman spectra for the CA substrate and an rGO filtration membrane.…”

Section: Rgo Filtration Membranes Characterizationmentioning

confidence: 94%

Reduced Graphene Oxide Filtration Membranes for Dye Removal—Production and Characterization

Lima

Oliveira

Demosthenes

et al. 2020

The 2nd International Online-Conference on Nanomaterials

View full text Add to dashboard Cite

Dye removal from manufacturing and textile industry wastewater is one of the biggest challenges in plants. The improper disposal of water with residual dyes can contaminate effluents and fresh water sources. In this work, filtration membranes based on reduced graphene oxide (rGO) were fabricated by the spray coating method, and its capability to remove dyes from water was evaluated. Graphene oxide was prepared by a modified Hummers method and posteriorly reduced with ascorbic acid; a simple and fast spray coating fabrication method was employed to produce stable membranes, which were analyzed in a home-made permeation cell. Raman spectroscopy and scanning electron microscopy (SEM) were able to prove that rGO dispersion was formed by graphene flakes with about 45.9 μm of lateral dimension; X-ray diffraction, SEM and Raman analyses indicate that the spray method was efficient in producing stable and uniform filtration membranes; and UV-vis absorption spectra of feed and permeation solution indicate that rGO membranes were capable in removing dye from water. By the main results, it is possible to affirm that rGO filtration membranes are an efficient, low-cost, scalable and fast way to remove dyes from wastewater.

show abstract

Section: Rgo Filtration Membranes Characterizationmentioning

confidence: 94%

Reduced Graphene Oxide Filtration Membranes for Dye Removal—Production and Characterization

Lima

Oliveira

Demosthenes

et al. 2020

The 2nd International Online-Conference on Nanomaterials

View full text Add to dashboard Cite

show abstract

“…To dope TiO 2 , cations like rare earth metals, noble metals, weak metals and transition metals have been used [26]. In addition, when a metallic ion is doped with TiO 2 , the light absorption range expands, whereas the redox potential of the photogenerated radicals increases [58][59][60]. This generally results in the transfer of photoexcited electrons from the TiO 2 conduction band to metal particles deposited on the TiO 2 surface.…”

Section: • Cationic Doping Of Tiomentioning

confidence: 99%

“…Although embedding nanoparticles onto membranes remove unwanted nanoparticles after treatment, the polymer phase material covering the nanoparticles can reduce the active usable surface area [107]. Owing to the blockage of the membrane pores by TiO 2 nanoparticles, the photocatalytic membrane's pure water flux usually decreases as the concentration of TiO 2 in the coating phase rises [58,107,109,111].…”

Section: Tio 2 Nanoparticle-coated Polymer Membranesmentioning

confidence: 99%

“…Polymer membranes are one of the most popular membranes used in wastewater treatment and water purification (Table 4). Polymers reported as support membranes of photocatalysts include polyamide, polyvinylidene fluoride (PVDF) [23], polyethersulfone (PES), poly (vinylidene fluoride) (PVDF) [24], sulfonated polyethersulfone (SPES), poly (vinylidene fluoride) [105][106][107][108], polyurethane (PU) [98], polyethylene terephthalate (PET) [82], polyester [58], polyacrylonitrile (PAN) [43] and polytetrafluoroethylene (PTFE) [109][110][111][112][113][114]. Polymer-inorganic nanoparticle composite membranes can be divided into two groups based on their structure: (a) polymer and inorganic phases linked by covalent bonds, and (b) polymer and inorganic phases linked by van der Waals forces or hydrogen bonds [113].…”

Section: Tio 2 -Based Polymeric Membranesmentioning

confidence: 99%

“…Anionic dopants result in p-state substitution in TiO 2 by altering the atomic level in the valance band and subsequent shift of the conduction band. For instance, incorporation of carbon into TiO 2 contributes to the formation of carbonaceous species on the surface, which increases the visible light absorption [18,58,60]. Furthermore, the presence of more reactive sites, which facilitate the adsorption of more target contaminants, is another explanation for the increase in photocatalytic activity of C-doped TiO 2 due to its higher surface area [26].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Prospects of Synthesized Magnetic TiO2-Based Membranes for Wastewater Treatment: A Review

et al. 2021

View full text Add to dashboard Cite

Global accessibility to clean water has stressed the need to develop advanced technologies for the removal of toxic organic and inorganic pollutants and pathogens from wastewater to meet stringent discharge water quality limits. Conventionally, the high separation efficiencies, relative low costs, small footprint, and ease of operation associated with integrated photocatalytic-membrane (IPM) technologies are gaining an all-inclusive attention. Conversely, photocatalysis and membrane technologies face some degree of setbacks, which limit their worldwide application in wastewater settings for the treatment of emerging contaminants. Therefore, this review elucidated titanium dioxide (TiO2), based on its unique properties (low cost, non-toxicity, biocompatibility, and high chemical stability), to have great potential in engineering photocatalytic-based membranes for reclamation of wastewater for re-use. The environmental pathway of TiO2 nanoparticles, membranes and configuration types, modification process, characteristics, and applications of IPMs in water settings are discussed. Future research and prospects of magnetized TiO2-based membrane technology is highlighted as a viable water purification technology to mitigate fouling in the membrane process and photocatalyst recoverability. In addition, exploring life cycle assessment research would also aid in utilizing the concept and pressing for large-scale application of this technology.

show abstract

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Feng,

Lv,

Liu

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

Facing increasing electromagnetic radiation pollution, soft sensors with electromagnetic interference (EMI) shielding is highly desirable. Here, flexible electromagnetic shielding [polyacrylonitrile/Fe3O4/polyaniline]//[multiwalled carbon nanotube/polyvinyl pyrrolidone] (denoted [PAN/Fe3O4/PANI]//[MWCNT/PVP]) Janus membrane is reported for pressure and sliding sensing. The [PAN/Fe3O4/PANI] layer of Janus membrane as the force and sliding sensing unit can generate direct current‐type (DC‐type) voltage signals by conducting polymer/metal Schottky junction, whereas [MWCNT/PVP] layer serves as main electromagnetic shielding unit. Under the vertical force and horizontal sliding of aluminum (Al) foil, it can output DC‐type voltage signals based on the Schottky contact. The performance of [PAN/Fe3O4/PANI]//[MWCNT/PVP] Janus membrane for pressure and sliding sensing is appropriately explored and assessed. Moreover, the Janus membrane exhibits excellent shielding effects with average EMI shielding effectiveness (SE) of 37.54 dB in 8.2–12.4 GHz (X‐Band) frequency ranges. Thus, based on the asymmetrical double‐layer structure, soft DC‐type sensor with EMI shielding is achieved, showing utilization potential in wearable electronics and intelligent robots.

show abstract

Enhanced photocatalytic degradation of organic dyes by ultrasonic-assisted electrospray TiO2/graphene oxide on polyacrylonitrile/β-cyclodextrin nanofibrous membranes

Cited by 91 publications

References 69 publications

Reduced Graphene Oxide Filtration Membranes for Dye Removal—Production and Characterization

Reduced Graphene Oxide Filtration Membranes for Dye Removal—Production and Characterization

Prospects of Synthesized Magnetic TiO2-Based Membranes for Wastewater Treatment: A Review

Electromagnetic shielding Janus membrane for direct current‐type pressure and sliding sensing

Contact Info

Product

Resources

About