A room temperature ammonia gas sensor based on cellulose/TiO 2 /PANI composite nanofibers

Pang, Zengyuan; Yang, Zhanping; Chen, Yun; Zhang, Jinning; Wang, Qingqing; Huang, Fenglin; Wei, Qufu

doi:10.1016/j.colsurfa.2016.01.024

Cited by 154 publications

(55 citation statements)

References 30 publications

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“…Another possible application of conductive polyaniline/cellulose could be the sensing of ammonia gas, whereas graphene‐cellulose nanocomposites can be promising candidates for tactile sensors . Composites of cellulose with conductive materials can be further used for sensing humidity, temperature and pressure, as shown next.…”

Section: Applications For Functionalized Cellulosementioning

confidence: 99%

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Bethke

Palantöken

Andrei

et al. 2018

Adv Funct Materials

215

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As the most abundant natural polymer, cellulose presents a unique advantage for large-scale applications. To fully unlock its potential, the introduction of desired functional groups onto the cellulose backbone is required, which can be realized by either chemical bonding or physical surface interactions. This review gives an overview of the chemistry behind the state-of-the-art functionalization methods (e.g., oxidation, esterification, grafting) for cellulose in its various forms, from nanocrystals to bacterial cellulose. The existing and foreseeable applications of the obtained products are presented in detail, spanning from water purification and antibacterial action, to sensing, energy harvesting, and catalysis. A special emphasis is put on the interactions of functionalized cellulose with heavy metals, focusing on copper as a prime example. For the latter, its toxicity can either have a harmful influence on aquatic life, or it can be conveniently employed for microbial disinfection. The reader is further introduced to recent sensing technologies based on functionalized cellulose, which are becoming crucial for the near future especially with the emergence of the internet of things. By revealing the potential of water filters and conductive clothing for mass implementation, the near future of cellulose-based technologies is also discussed.not suitable for drinking water treatment in rural areas or not applicable on a large scale. Other methods involving materials which have high adsorption capacities for pollutants, for example activated charcoal have been explored. [27,28] Nevertheless, there are no universal adsorbents for all pollutants, meaning that superior alternatives are still required. In recent years, biodegradable adsorbents such as cellulose and chitosan have attracted much attention for the removal of heavy metals.In particular cellulose has a number of advantages, which include high abundance, low cost, easy access, nontoxicity and biodegradability. It is particularly suited for the removal of low concentrations of heavy metals which occur in contaminated ground or tap water. [26] Beyond the aspects of copper removal from water, in this review we indicate how the metal's increased toxicity for microbial life can present an advantage for medical applications. Moreover, we also take a closer look at further applications of functionalized cellulose, including catalysis and sensing, which can make a great impact regarding energy conversion and management. The inclusion of conductive cellulose sensors within the internet of things global network is of particular interest, since an accurate weather forecast can provide swift adjustments in the usage of the often intermittent renewable energy sources. In order to understand what confers functionalized cellulose its versatility for broad applications, we first exemplify the functionalization techniques on a molecular basis.

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Section: Applications For Functionalized Cellulosementioning

confidence: 99%

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Bethke

Palantöken

Andrei

et al. 2018

Adv Funct Materials

215

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show abstract

“…At the heterostructure interface, the electrons will transfer from the material with higher Fermi level to another with lower Fermi level, while the holes will transfer rightabout until the Fermi levels is equalized. In this process, electron depletion layer, an efficient current switch, will form at the interface of the heterostructures, thus leading to high gas sensitivity [ 166 , 167 , 168 ].…”

Section: Diverse Nanoheterostructural Gas Sensorsmentioning

confidence: 99%

TiO2-Based Nanoheterostructures for Promoting Gas Sensitivity Performance: Designs, Developments, and Prospects

Wang

Zhou

et al. 2017

Sensors

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Gas sensors based on titanium dioxide (TiO2) have attracted much public attention during the past decades due to their excellent potential for applications in environmental pollution remediation, transportation industries, personal safety, biology, and medicine. Numerous efforts have therefore been devoted to improving the sensing performance of TiO2. In those effects, the construct of nanoheterostructures is a promising tactic in gas sensing modification, which shows superior sensing performance to that of the single component-based sensors. In this review, we briefly summarize and highlight the development of TiO2-based heterostructure gas sensing materials with diverse models, including semiconductor/semiconductor nanoheterostructures, noble metal/semiconductor nanoheterostructures, carbon-group-materials/semiconductor nano- heterostructures, and organic/inorganic nanoheterostructures, which have been investigated for effective enhancement of gas sensing properties through the increase of sensitivity, selectivity, and stability, decrease of optimal work temperature and response/recovery time, and minimization of detectable levels.

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“…Therefore, research interests in PANI and NPANI have been focused in recent years due to low cost, ease of synthesis and environmental stability [12,13]. Some applications of PANI or NPANI and their composites have been recently reported including nanobelts of TiO 2 @PANI [14], polyaniline@cadmium sulfide (PANI@CdS) core-shell nanoparticles [15], PANI/PS/Ag-NPs nanomaterials [16], polyaniline-polyurethane [17], nanostructure CuO-PANI [18] and cellulose/titanium dioxide/polyaniline (cellulose/TiO 2 /PANI) nanofibers [19].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites of nanosilica-immobilized-nanopolyaniline and crosslinked nanopolyaniline for removal of heavy metals

Mahmoud

Fekry

El-Latif

2016

Chemical Engineering Journal

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A room temperature ammonia gas sensor based on cellulose/TiO 2 /PANI composite nanofibers

Cited by 154 publications

References 30 publications

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

Functionalized Cellulose for Water Purification, Antimicrobial Applications, and Sensors

TiO2-Based Nanoheterostructures for Promoting Gas Sensitivity Performance: Designs, Developments, and Prospects

Nanocomposites of nanosilica-immobilized-nanopolyaniline and crosslinked nanopolyaniline for removal of heavy metals

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