TiO2–SiO2 nanocomposites from technological wastes for self-cleaning cement composition

Tyukavkina, V. V.; Shchelokova, E. A.; Tsyryatyeva, A.V.; Kasikov, А. G.

doi:10.1016/j.jobe.2021.102648

Cited by 10 publications

(4 citation statements)

References 59 publications

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“…Например, в работе [95] авторы упоминают приложения для измерения цвета поверхностей пищевых продуктов [100], для выявления повреждений растений кукурузы [101], определения местоположения персонажей на изображениях сцен [102], автоматического мониторинга снежного покрова в Антарктиде [103], оценки гумусированности почв на основе обработки их цифровых фотоизображений [104; 105], простого анализа поровой структуры почв [106] и ряд других [107][108][109][110][111]. Отдельно отметим исследования сотрудников Института химии и технологии редких элементов и минерального сырья (ИХТРЭМС) КНЦ РАН, в которых с применением цифровых изображений изучена способность модифицированного титаносиликатной добавкой цементного камня к самоочищению под воздействием видимого и ультрафиолетового (УФ) света [112][113][114].…”

Section: взаимосвязь температуры и влажности материала хвостов обогащ...unclassified

“…После орошения образцы выдерживали в течение 12 часов. Затем измеряли температуру каждого образца и выполняли фотосъемку при естественном освещении и УФ-свете [112][113][114]. Понятно, что использование УФ-света возможно только в лабораторных экспериментах.…”

Section: взаимосвязь температуры и влажности материала хвостов обогащ...unclassified

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Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

Amosov,

Baklanov,

Goryachev

et al. 2023

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Studies of dusting of KB JSC “Apatit” enrichment tailings are presented. An assessment was made of the relationship between the meteorological parameters of the warm period and the tailings dusting intensity, which leads to an excess of MPC in Apatity, Murmansk region. An overview of the available methods for suppressing the dust particles emission during the operation of current and mothballed tailings dumps is presented. The results of new binding reagents testing are presented: in situ monitoring of the fixed surface state and laboratory studies of physical and mechanical properties, affecting the resistance to aggressive influences, as well as the effect of the binding reagents intake into recycled water on the technological parameters of apatite-nepheline ore flotation. It was shown that in addition to tailings dumps, transport and other industrial enterprises have a significant load on atmospheric air. The role of green zones within buffer zone, as well as in urban area was experimentally noted. An approach was tested (on a laboratory scale) for analyzing digital photographs of enrichment tailings material using RGB- and Lab-techniques to determine the quantitative relationship between temperature and humidity of the studied material. The results of computer simulation of both dusting at the ANOF-2 tailings dump and atmospheric pollution with a multi-dispersed impurity along the downward wind flow based on two- and three-dimensional CFD models. An assessment was made of the technological measures effectiveness to reduce the dusting intensity on the tailings dump beaches. The monograph is addressed to engineering and technical workers of the chemical industry, scientists, environmental practitioners, as well as citizens living in areas where mining and processing plants and interested in a clean atmosphere. It may be useful for students of higher educational institutions studying in chemical and environmental fields.

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Section: взаимосвязь температуры и влажности материала хвостов обогащ...unclassified

Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

Amosov,

Baklanov,

Goryachev

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In addition, it has been widely used as a coating layer for metal oxides [28], [29]. Furthermore, it has been reported that the introduction of SiO 2 layer is capable to inhibit the aggregation of nanomaterials [30]. In fact, Li et al stated that the incorporation of SiO 2 does not contribute to the additional scattering effect as its refractive index matched with silica optical fiber [31].…”

Section: Introductionmentioning

confidence: 99%

TiO₂-SiO₂ Nanocomposite Saturable Absorber for Ultrafast Photonics

Yusoff

Rosli

et al. 2023

IEEE Photonics J.

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A tapered microfiber decorated with titanium dioxide-silicon dioxide nanocomposite saturable absorber (TiO 2 -SiO 2 -SA) is demonstrated via alkali fusion method and spincoating technique. The TiO 2 -SiO 2 -SA exhibited 17.1% modulation depth, 31.7 µJ/cm 2 saturation fluence and 35.4% non-saturable loss. The TiO 2 -SiO 2 -SA was able to generate a pulse duration of 797 fs at a repetition rate of 10.39 MHz and an average output power of 16.57 mW at 1.56 µm. This work presents an enhanced pulse duration within titanium-based saturable absorbers. The high damage threshold of beyond 24.82 GW/cm 2 and excellent stability are believed to have opened a new route of using nanomaterials derived from waste product for next generation ultrafast photonic applications.

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“…Vehicle exhaust emissions can reduce lung function, thereby increasing the risk of respiratory diseases [3][4][5]. NO x emitted from vehicle exhaust is a major contributor to air pollution, posing significant hazards to human health and the environment [6][7][8][9]. Furthermore, previous studies have suggested that nitrogen dioxide (NO 2 ) is linked to a higher occurrence of diabetes and cardiovascular diseases [10,11].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

Kuang,

Ding,

Peng

et al. 2023

Catalysts

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Nano-TiO2 combined with cement slurry can be utilized to degrade nitrogen oxides (NOx) in vehicle exhaust, making it an excellent photocatalytic material for air purification. In practice, environmental factors can significantly affect the photocatalytic performance. In this study, a vehicle exhaust test system was developed, and the test methods and evaluation criteria for the degradation test are provided. This study investigated the photocatalytic degradation of NO2 using nano-TiO2 cement slurry through laboratory tests. The effects of temperature, relative humidity, ultraviolet (UV) radiation flux, cement slurry thickness, surface dust adherence, and the number of water rinsing cycles were examined. Additionally, nano-TiO2 cement slurries were applied to an expressway toll station. The results showed that the efficiency of photocatalytic degradation was significantly influenced by temperature and UV radiation flux, while the thickness of the cement slurry had minimal impact. The photocatalytic degradation efficiency was negatively correlated to the relative humidity, when the relative humidity of the cement slurry specimens was high. This is because the excess water (H2O) competes with NO2 for adsorption. The photocatalytic performance of the samples was significantly reduced by surface dust and rain erosion, as both led to a decrease in the amount of nano-TiO2 participating in the reaction. Furthermore, the photocatalytic material has wide-ranging potential applications. The findings of this study would support the promotion of environmentally friendly roads as a strategy to combat air pollution.

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TiO2–SiO2 nanocomposites from technological wastes for self-cleaning cement composition

Cited by 10 publications

References 59 publications

Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

TiO₂-SiO₂ Nanocomposite Saturable Absorber for Ultrafast Photonics

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

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TiO2–SiO2 nanocomposites from technological wastes for self-cleaning cement composition

Cited by 10 publications

References 59 publications

Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

Dusting of apatite-nepheline ores enrichment tailings: an environmental problem and pathways to solve it

TiO2-SiO2 Nanocomposite Saturable Absorber for Ultrafast Photonics

Photocatalytic Degradation of Vehicle Exhaust by Nano-TiO2 Cement Slurry: Experimental Factors and Field Application

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TiO₂-SiO₂ Nanocomposite Saturable Absorber for Ultrafast Photonics