Synthesis and applications of nano-TiO2: a review

Noman, Muhammad Tayyab; Ashraf, Muhammad Azeem; Ali, Azam

doi:10.1007/s11356-018-3884-z

Cited by 282 publications

(129 citation statements)

References 178 publications

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“…Furthermore, due to the good compatibility with many perovskite materials, and oxygen‐ion conductive property, ZrO 2 aerogel shows a great potential application in solid oxide fuel cells . TiO 2 aerogel, especially anatase TiO 2 aerogel, possesses photocatalytic and photovoltaic properties and has been applied in numerous fields . V 2 O 5 has a layered structure which can host two lithium ions, showing an enhanced capacity for lithium ion battery when compared with the commercial cathode materials, so their aerogels have been intensively used as a cathode material .…”

Section: Preparation and Classification Of Aerogelsmentioning

confidence: 99%

“…[111] TiO 2 aerogel, especially anatase TiO 2 aerogel, possesses photocatalytic and photovoltaic properties and has been applied in numerous fields. [112] V 2 O 5 has a layered structure which can host two lithium ions, showing an enhanced capacity for lithium ion battery when compared with the commercial cathode materials, [113] so their aerogels have been intensively used as a cathode material. [114,115] V 2 O 5 itself is a catalytic material, so its aerogel can be used as efficient and selective catalyst.…”

Section: Inorganic Aerogelsmentioning

confidence: 99%

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Versatile Aerogels for Sensors

Yang

Zheng

et al. 2019

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119

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Aerogels are unique solid‐state materials composed of interconnected 3D solid networks and a large number of air‐filled pores. They extend the structural characteristics as well as physicochemical properties of nanoscale building blocks to macroscale, and integrate typical characteristics of aerogels, such as high porosity, large surface area, and low density, with specific properties of the various constituents. These features endow aerogels with high sensitivity, high selectivity, and fast response and recovery for sensing materials in sensors such as gas sensors, biosensors and strain and pressure sensors, among others. Considerable research efforts in recent years have been devoted to the development of aerogel‐based sensors and encouraging accomplishments have been achieved. Herein, groundbreaking advances in the preparation, classification, and physicochemical properties of aerogels and their sensing applications are presented. Moreover, the current challenges and some perspectives for the development of high‐performance aerogel‐based sensors are summarized.

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Section: Preparation and Classification Of Aerogelsmentioning

confidence: 99%

Section: Inorganic Aerogelsmentioning

confidence: 99%

Versatile Aerogels for Sensors

Yang

Zheng

et al. 2019

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119

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“…Additionally, TiO 2 NPs from Ti-based flocculated sludge are found to be morphologically superior with equivalent photocatalytic activities as compared to commercially available P25 [22]. TiO 2 is a widely applied compound in the photocatalytic and photovoltaic sector, due to its unique optical and electronic properties [23,24]. Although the use of photocatalyst in the degradation of gaseous pollutants is not yet a well-accepted practice, due to the low effectiveness and release of toxic intermediates [25,26], the photocatalytic application of TiO 2 in the field of air purification has received significant attention.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Photoactive Anatase TiO2 from Algae Bloomed Surface Water

et al. 2020

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The purpose of the study was to effectively treat algae bloomed water while using a Ti-based coagulant (TiCl4) and recover photoactive novel anatase TiO2 from the flocculated sludge. Conventional jar tests were conducted in order to evaluate the coagulation efficiency, and TiCl4 was found superior compared to commercially available poly aluminum chloride (PAC). At a dose of 0.3 g Ti/L, the removal rate of turbidity, chemical oxygen demand (COD), and total phosphorus (TP) were measured as 99.8%, 66.7%, and 96.9%, respectively. Besides, TiO2 nanoparticles (NPs) were recovered from the flocculated sludge and scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDX), and X-ray diffraction (XRD) analysis confirmed the presence of only anatase phase. The recovered TiO2 was found to be effective in removing gaseous CH3CHO and NOx under UV-A lamp at a light intensity of 10 W/m2. Additionally, the TiO2 mixed mortar blocks that were prepared in this study successfully removed atmospheric nitrogen oxide (NOx) under UV irradiance. This study is one of the first to prepare anatase TiO2 from flocculated algal sludge and it showed promising results. Further research on this novel TiO2 concerning internal chemical bonds and shift in the absorbance spectrum could explore several practical implications.

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“…Among the various semiconducting materials, great attention has been drawn to (anatase) titanium dioxide (TiO 2 ) because of its high photocatalytic activity, resistance to photocorrosion, biological inertness and low cost. The main principles of TiO 2 photocatalysis in the presence of TiO 2 under artificial or solar irradiation are extensively presented in several review articles . In brief, irradiation of an aqueous TiO 2 suspension with light energy greater than the band gap energy of the semiconductor ( E g > 3.2 eV) results in the generation of conduction band electrons (e − ) and valence band holes (h + ), which serve as powerful oxidants and reductants, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The main principles of TiO 2 photocatalysis in the presence of TiO 2 under artificial or solar irradiation are extensively presented in several review articles. 3,4 In brief, irradiation of an aqueous TiO 2 suspension with light energy greater than the band gap energy of the semiconductor (E g > 3.2 eV) results in the generation of conduction band electrons (e − ) and valence band holes (h + ), which serve as powerful oxidants and reductants, respectively. Photogenerated electrons react with the adsorbed molecular O 2 on the Ti(III)-sites, reducing it to the superoxide radical anion (O 2…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites

Berberidou

Kyzas

Paspaltsis

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions. RESULTS The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS. CONCLUSIONS These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry

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Synthesis and applications of nano-TiO2: a review

Cited by 282 publications

References 178 publications

Versatile Aerogels for Sensors

Versatile Aerogels for Sensors

Preparation and Characterization of Photoactive Anatase TiO2 from Algae Bloomed Surface Water

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites

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Synthesis and applications of nano-TiO2: a review

Cited by 282 publications

References 178 publications

Versatile Aerogels for Sensors

Versatile Aerogels for Sensors

Preparation and Characterization of Photoactive Anatase TiO2 from Algae Bloomed Surface Water

Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites

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Product

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Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO₂ composites