Micro-/nanostructured ZnFe2O4 hollow sphere/GO composite for structurally enhanced photocatalysis performance

Zhao, Yangyang; Xu, Qiankun; Chakir, Soufian; Xu, Yongfei; Xu, Bao Cai; Hu, Yonghua

doi:10.1007/s12598-022-02200-0

Cited by 16 publications

(4 citation statements)

References 61 publications

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Section: Methodsmentioning

confidence: 99%

“…The formation mechanism of hollow Ni 0.5 Mg 0.5 Fe 2 O 4 is assumed by the following chemical reactions: 22,23 urea, as a base source, hydrolyzes and releases carbon dioxide and ammonia when heated to more than 60 1C (reactions (1) and ( 2)). 22 As shown in reactions ( 3)-( 6), the Ni 2+ , Mg 2+ and Fe 3+ react with OH À to form precipitates. According to Ostwald's ripening theory, the tiny solute crystals dissolve and redeposit onto the bigger crystals, 23 accompanied by the release of bubbles that serve as templates for forming hollow structures.…”

Section: Methodsmentioning

confidence: 99%

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Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

Shu,

Xu,

Zhao

2023

J. Mater. Chem. C

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

Shu,

Xu,

Zhao

2023

J. Mater. Chem. C

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“…The Scheme 1 illustrates the procedure for creating ZSG composites using micro and nano ZSG. The hydrothermal method is used to produce SnO 2 quantum dots by hydrolyzing urethane as a base source, resulting in the release of CO 2 and NH 3 when heated to 180 • C. The interaction between NH 3 and H 2 O produces NH 3 •H 2 O. Ammonia then decomposes and combines with tin salts to make Sn(OH) 6 2− , which eventually leads to the creation of SnO 2 as shown in reactions (14, 15, 16, and 17) [61]. While manufacturing ZnO, the zinc salt reacts with OH − to produce Zn(OH) 4 2− , which ultimately leads to the formation of ZnO, as observed in reactions (18,19)…”

Section: Sample Preparation For Go Zs and Zsgmentioning

confidence: 99%

Synergistic Enhancement of Carrier Migration by SnO2/ZnO@GO Heterojunction for Rapid Degradation of RhB

Chen,

Li,

Wang

et al. 2024

Molecules

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Organic dyes in natural waters jeopardize human health. Whether semiconductor materials can effectively degrade dyes has become a challenge for scientific research. Based on this, this study rationally prepared different nanocomposites to remove organic dyes effectively. Pure SnO2 quantum dots, ZnO nanosheets, and SnO2/ZnO (ZS) binary nanocomposites are prepared using the hydrothermal method. Subsequently, SnO2/ZnO@GO (ZSG) ternary composites containing different amounts of GO, i.e., ZSG-5, ZSG-15, and ZSG-25, are synthesized by an ultrasonic water bath method, in which ZS was coupled with GO to form Z-type heterojunctions. The ZSG-15 ternary composites exhibited excellent photocatalytic activity for the degradation of rhodamine B by simulating sunlight. The test results show that the degradation rate of ZSG-15 is about 7.6 times higher than ZnO. The increase in photocatalytic activity is attributed to the synergistic effect of SnO2 and GO to improve the separation efficiency of photogenerated carriers in ZnO. Notably, the large specific surface area of GO increases the reactive sites. Compared with binary nanocomposites, ZSG-15 broadens the response range to light while further accelerating the electron transport rate and improving the photoelectric stability.

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“…Depending on the type of photoblocker, the mode of their action is different. Inorganic filters usually reflect or scatter ultraviolet radiation via an optical mechanism [6,7]. In turn, organic UV blockers absorb the light that implicates chemical changes in the molecules, such as isomerization.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of UV Filters into Oil-in-Water Emulsions—Release and Permeability Characteristics

Olejnik

Gościańska

2023

Applied Sciences

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Unlike in many countries, in the USA, UV filters are treated as drugs and strictly regulated by the Food and Drug Administration. So far, 17 physical and chemical sunscreen agents were approved there to protect against the harmful effects of UV irradiation. In the European Union, access to UV filters is much larger, which gives manufacturers more options to create new sunscreen products in the form of lotions, sprays, oils, creams, gels, pastes, and sticks. Recently, concerns have been raised about the potential unfavorable effects of some UV filters that can penetrate the skin and enter into the systematic circulation. In this study, we prepared oil-in-water emulsions containing two commonly applied sunscreen agents, avobenzone and octyl methoxycinnamate. The formulations were characterized by a high stability at room temperature and a pH in the range of 6.02–6.11. The processes of sunscreen agent release and permeation were performed in a receptor fluid with a pH 5.8 using Strat-M and cellulose membranes to mimic the skin. It was proved that octyl methoxycinnamate exhibited different liberation and permeation patterns than avobenzone, mostly due to its higher lipophilicity. Both processes were also influenced by the type of membrane applied. The liberation of UV filters to the receptor fluid via the cellulose membrane depended on their concentration in the emulsion. As the amount of sunscreen agent in the formulation increases, more of its molecules diffuse to the receiving medium after 48 h. The permeation of the UV filters through the Strat-M membrane occurs at a very low level, 2% for octyl methoxycinnamate and 0.3% for avobenzone, which supports the safety and efficacy of the topical formulations obtained.

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Micro-/nanostructured ZnFe2O4 hollow sphere/GO composite for structurally enhanced photocatalysis performance

Cited by 16 publications

References 61 publications

Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

Synergistic Enhancement of Carrier Migration by SnO2/ZnO@GO Heterojunction for Rapid Degradation of RhB

Incorporation of UV Filters into Oil-in-Water Emulsions—Release and Permeability Characteristics

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