Sonochemical synthesis of BiOI-TiO2heterojunction with enhanced visible-light-driven photocatalytic activity

Cai, Li‐Zhen; Yao, Jingwen; Li, Jibiao; Zhang, Yanfeng; Wei, Yu

doi:10.1016/j.jallcom.2018.12.387

Cited by 77 publications

(22 citation statements)

References 46 publications

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“…[ 9,10 ] To solve this problem, fabricated BiOI with semiconductor to construct heterojunctions to suppressing the recombination of photogenerated electron–hole pairs has been applied to improve the photocatalytic activities of BiOI. [ 11–13 ]…”

Section: Introductionmentioning

confidence: 99%

Novel n‐p‐n heterojunction of AgI/BiOI/UiO‐66 composites with boosting visible light photocatalytic activities

Zhu

Chen

Dai

et al. 2021

Applied Organom Chemis

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Antibiotics, considered as persistent organic pollutants, have harmful effect on the environment and human health. We aimed at designing and fabricating ternary AgI/BiOI/UiO‐66 composites and evaluate the photocatalytic activities of tetracycline (TC) in water environment under visible light irradiation. X‐ray diffractometer (ХRD), scanning electron microscopy–energy dispersive X‐ray spectroscopy (SEM‐EDS), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), and ultraviolet–visible (UV‐vis) diffuse reflectance spectra (DRS) analyses were carried out to characterize the ternary AgI/BiOI/UiO‐66 composites. The effects of pristine BiOI, UiO‐66, and AgI loading ratios on the AgI/BiOI/UiO‐66 composites for TC photodegradation were evaluated to obtain the optimal one (1‐ABU), which can remove 90.1% TC with visible light irradiation. In the batch experiment, the influences of pH, ion strength, TC concentration, and dosage of photocatalyst were investigated. 1‐ABU exhibited excellent photocatalytic activities and stability including pH and ion strength resistance in certain degree. After recycled five times, 1‐ABU still showed good degradation efficiency, indicating the advanced stability of the ternary composites. ·OH and h+ active species are the prime, whereas ·O2− act as secondary during the TC degradation process. 1‐ABU exhibits an n‐p‐n heterojunction, which can inhibit the recombination of photogenerated electron–hole pairs and generate more active ·OH species. This work highlights a reference for the design and synthesis of heterojunction for excellent photocatalytic performance.

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Section: Introductionmentioning

confidence: 99%

Novel n‐p‐n heterojunction of AgI/BiOI/UiO‐66 composites with boosting visible light photocatalytic activities

Zhu

Chen

Dai

et al. 2021

Applied Organom Chemis

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“…Apesar das vantagens apresentadas pela cristalização simultânea, ainda são necessários estudos sistemáticos para propor estratégias de síntese mais eficientes para assegurar o controle da proporção desejada entre os semicondutores, assim como o controle das suas características físico-químicas e eletrônicas, principalmente na produção em maior escala. 38,39 Obtenção de heteroestruturas pelo crescimento de uma fase sobre outra pré-formada A cristalização de uma fase sobre outra pré-formada minimiza a ocorrência de dopagem e proporciona um elevado controle da composição e da morfologia de pelo menos uma das fases constituintes da heteroestrutura. Esta abordagem foi utilizada com sucesso no crescimento de SnO 2 via métodos sol-gel hidrolítico e precursores poliméricos sobre o TiO 2 pré-formado.…”

Section: Obtenção De Heteroestruturas Por Crescimento Simultâneo Das unclassified

“…Estratégias similares foram utilizadas em outros trabalhos para a obtenção de heteroestruturas por meio da heteroagregação das duas fases pré-formadas, tais como, Bi 2 S 3 /CdS, 47 BiOI/TiO 2 , 38 óxido de grafeno reduzido (RGO)/ZnO. 48 Esses sistemas apresentaram um alto potencial de aplicação em processos fotocatalíticos e demonstraram a eficiência e a versatilidade desse método de síntese.…”

Section: Obtenção De Heteroestruturas Usando Fases Pré-formadasunclassified

Semicondutores Heteroestruturados: Uma Abordagem Sobre Os Principais Desafios Para a Obtenção E Aplicação Em Processos Fotoquímicos Ambientais E Energéticos

Bueno¹,

Lopes²,

Carvalho³

et al. 2019

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The study of the heterostructures aim the development of physico-chemical and photocatalytic properties higher than their isolated phases, which makes it possible to obtain higher efficiency and lower cost in several technological processes. Recently the heterostructured materials have been extensively used in the development of alternative technologies either for environmental pollution control or for renewable energy production, among other applications. However, the obtaining of a heterostructure with suitable features is not trivial. In this way, this review article presents a broad discussion about methods of obtaining heterostructures formed by semiconductors and their applications in the photochemical processes, mainly in the environmental field. It will be addressed the use of the heterostructures in photocatalytic application for the organic pollutants degradation, heavy metals removal, the inactivation of pathogenic microorganisms, beyond of the volatile organic compounds (VOC's) photooxidation and the photocatalytic abatement of nitrogen oxide (NO x) in gaseous phase. Finally, a discussion about the carbon dioxide (CO 2) photoreduction and hydrogen (H 2) production focusing mainly in the chemical energy production will be presented.

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“…Fortunately, researchers had proposed a facile method, namely, coupling a different semiconductor with BiOI to construct a novel composite, to settle this shortage. As proposed by Rui et al , these composites, such as Ag 3 PO 4 /GdCrO 3 , CuWO 4 /Ag/GdCrO 3 , and Bi 2 WO 6 /Ag/GdCrO 3 exhibited splendid VOC oxidation and CO 2 reduction under visible light irradiation. , Furthermore, lots of other composites, such as g-C 3 N 4 @BiOI, ZnO@BiOI, BiOI@TiO 2 , BiOBr@BiOI, and so forth, had been developed to be used as photocatalysts to degrade organic pollutants. − In spite of this, their absorption edge still limit in the visible range and the long wavelength light ( i.e ., NIR) cannot be used. Therefore, more efforts should be made to further improve the absorption range of the photocatalysts.…”

Section: Introductionmentioning

confidence: 98%

Utilizing Upconversion Emission to Improve the Photocatalytic Performance of the BiOI Microplate: A Bifunctional Platform for Pollutant Degradation and Hydrogen Production

Wang

Luo

et al. 2021

Ind. Eng. Chem. Res.

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Developing novel photocatalysts with intense sunlight-harvesting capacity is still a challenge to realize pollutant degradation and water splitting. To settle this issue, we couple the Gd 2 MoO 6 :0.04Er 3+ /0.10Yb 3+ (GMEY) upconverting particle with the BiOI microplate to construct the BiOI@GMEY-x composites. Their corresponding crystal structure, morphology, chemical composition, and upconversion (UC) properties are studied. Due to the UC emission behavior of the GMEY particle, near-infrared (NIR) light can be converted to green and red emissions which could be reabsorbed by the BiOI microplate, bringing about the full use of visible− NIR light by the prepared composites for photocatalysis. Upon visible light irradiation, the resultant samples exhibit good photocatalytic activities in the degradation of methyl blue, RhB, and methyl orange. Compared with that of the BiOI microplate, improved photocatalytic activity is achieved in the resultant composites due to the effect of a built-in electric field and an enhanced sunlight-harvesting ability. Furthermore, the h + and • O 2 − species are responsible for the mechanism of photocatalysis. Additionally, excited by full spectrum light, the H 2 production capacity of the designed samples is also investigated. It is found that the BiOI@GMEY-10 composite can split water efficiently and its H 2 production rate is 10.35 μmol/g/h. These results indicate that both pollutant degradation and water splitting are able to be realized by utilizing the BiOI

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Sonochemical synthesis of BiOI-TiO2heterojunction with enhanced visible-light-driven photocatalytic activity

Cited by 77 publications

References 46 publications

Novel n‐p‐n heterojunction of AgI/BiOI/UiO‐66 composites with boosting visible light photocatalytic activities

Novel n‐p‐n heterojunction of AgI/BiOI/UiO‐66 composites with boosting visible light photocatalytic activities

Semicondutores Heteroestruturados: Uma Abordagem Sobre Os Principais Desafios Para a Obtenção E Aplicação Em Processos Fotoquímicos Ambientais E Energéticos

Utilizing Upconversion Emission to Improve the Photocatalytic Performance of the BiOI Microplate: A Bifunctional Platform for Pollutant Degradation and Hydrogen Production

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