Solar Light Photocatalytic Degradation of Nitrite in Aqueous Solution Over CdS Embedded on Metal–Organic Frameworks

He, Jiao; Yang, Haiyan; Chen, Yongjuan; Yan, Zhiying; Zeng, Yanbo; Luo, Zhongrui; Gao, Wenyu; Wang, Jiaqiang

doi:10.1007/s11270-015-2420-8

Cited by 10 publications

(4 citation statements)

References 41 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, MIL-100(Fe) is a quite attractive MOF material for different applications due to several reasons including its mesoporous cavities, the reduced price of the linker and the metal source, the unsaturated metal centers with Lewis acid and redox properties, a non-apparent in vivo toxicity, etc. Among the different applications of MIL-100(Fe), its use as a photocatalyst is probably the application that has awakened the highest interest in the very few last years. − In general, MOF materials are being widely used as photocatalysts, ,− in part due to their highly tunable band gap thanks to their huge compositional and structural versatility. ,− Remarkably, MIL-100(Fe) by itself and/or supporting any species exalting its photocatalytic activity such as Fe 3 O 4 , CdS, or metals, can become quite photoactive by irradiating it with visible light, which emphasizes the sustainability of the global (synthesis plus application) process.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Preparation of MIL-100(Fe) and Its Photocatalytic Behavior in the Degradation of Methyl Orange in Water

Guesh

Caiuby

Mayoral

et al. 2017

Crystal Growth & Design

268

143

View full text Add to dashboard Cite

The real industrial establishment of MOFs requires significant advances in economic and chemical sustainability. This work describes a novel and simple method to prepare one of the most widely studied MOF material, i.e. MIL-100(Fe), which significantly improves the sustainability of the conventional process in several aspects. Interestingly, the only difference in the preparation method of MIL-100(Fe) compared with that of semi-amorphous Fe-BTC (MOF material commercialized as Basolite F300 having the same metal and linker, and which can be also prepared under similar sustainable conditions), is to start from Fe(II) or Fe(III) sources, respectively, which opens certain versatility options in the room temperature synthesis procedures of MOF materials. The prepared samples were characterized using XRD, TGA, N 2 adsorption/ desorption isotherms, Cs-aberration corrected STEM and UV-Vis DRS. These two room-temperature-made Fe-BTC materials were tested in the industrially-demanded photocatalytic degradation of methyl orange under both ultraviolet and solar light radiation. MIL-100(Fe) was a very active photocatalyst in comparison with its homologue. That difference was mainly attributed to the presence of larger cavities within its structure.

show abstract

Section: Introductionmentioning

confidence: 99%

Sustainable Preparation of MIL-100(Fe) and Its Photocatalytic Behavior in the Degradation of Methyl Orange in Water

Guesh

Caiuby

Mayoral

et al. 2017

Crystal Growth & Design

268

143

View full text Add to dashboard Cite

show abstract

“…The formed NH 2 • radicals react with NO • to form NH 2 NO intermediate, which is dissociated to form nitrogen and water as illustrated in Eqs. [26][27][28][29] [24,47,48]. The selectivity toward the N 2 gas formation will be thus determined by the formation of NH 2 NO intermediate which is sensitive to the pH values.…”

Section: Simultaneous Removal Of Nitrite and Ammonium Ionsmentioning

confidence: 99%

“…Photocatalysis is thus particularly suitable for removing nitrite ions under irradiation from liquid samples [26,27]. Nitrite ions can be either photocatalytically oxidized to nitrate or reduced to nitrogen gas.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the mechanisms of nitrite ions and ammonia removal from aqueous solutions: photolysis versus photocatalysis

Mokhtar

Ahmed

Kandiel

2022

Photochem Photobiol Sci

View full text Add to dashboard Cite

Nitrite ions and ammonia are widespread forms of inorganic water pollutants. Nevertheless, the mechanisms of their photolytic and photocatalytic reactions under UV-A irradiation are still fully undisclosed, particularly, at different pH values under aerobic and inert atmospheres. Herein, we have studied the photolytic decomposition of nitrite ions under different conditions using 365 nm UV-A LED as a light source instead of mercury lamps that emit photons in the UV-B region and generate a lot of heat. The results indicated that the rate of nitrite disproportionation in the dark at pH ≤ 3.0 is remarkably high relative to the rate of the photolytic decomposition. At pH ˃ 3, the photolytic reaction is negligible and nitrite ions showed considerable stability. In contrast, the photocatalytic oxidation of nitrite ions over TiO 2 photocatalysts, namely, TiO 2 P25, TiO 2 UV100, and TiO 2 anatase/brookite mixture proceeds at pH ˃ 3.0. TiO 2 P25 exhibited the highest photocatalytic activity at pH 5. Interestingly, the photolytic simultaneous removal of nitrite ions and ammonia was possible at pH 9.0 in the absence of oxygen (Ar atmosphere). A 42.69 ± 0.66%, 27.75 ± 1.7%, and 32.74 ± 0.59% of nitrogen calculated based on nitrite, ammonia, and both of them, respectively, can be removed after 6 h of UV-A irradiation. The selectivity of N 2 evolution was 77.6%. The nitrogen removal rate was significantly reduced in the presence of TiO 2 photocatalyst evincing that TiO 2 photocatalysis is applicable for nitrite ions oxidation, whereas the photolytic process is better suited for the simultaneous removal of nitrite ions and ammonia.

show abstract

“…With the rapid development of modern industry and agriculture, the concentration of nitrite anion in water body has been significantly rising due to excessive discharge of industrial effluents, overusing nitrogenous fertilizer and incomplete abiotic denitrification process [4][5][6]. At present, the nitrite has been considered as a common inorganic environmental contaminant, which presents a serious toxicity to human health [7][8][9]. The excess intake of nitrite, which combine with hemoglobin in the blood to form methemoglobin in the body, as a result, can cause human poisoning [10].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic conversion of nitrite in aqueous solution over nanocomposite photocatalyst Er3+:Y3Al5O12/BiPO4 using different photosources

Wang

et al. 2017

Journal of Industrial and Engineering Chemistry

View full text Add to dashboard Cite

/mMBIP) and their nanocomposite photocatalyst (Er 3+ :Y 3 Al 5 O 12 /(H-nM-mM)BIP) were prepared by hydrothermal, ultrasonic dispersion and liquid boiling methods. The prepared photocatalysts were characterized by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and UV-vis diffuse reflectance spectra (DRS). The catalytic activity of prepared photocatalysts was evaluated via photocatalytic conversion rate of nitrite under ultraviolet-light, visible-light and simulated solar-light irradiations. These three photocatalysts all exhibited excellent performance under simulated solar-light irradiation and reached 85.36 %, 84.42 % and 78.53 % conversion rates, respectively, for Er 3+ :

show abstract

Solar Light Photocatalytic Degradation of Nitrite in Aqueous Solution Over CdS Embedded on Metal–Organic Frameworks

Cited by 10 publications

References 41 publications

Sustainable Preparation of MIL-100(Fe) and Its Photocatalytic Behavior in the Degradation of Methyl Orange in Water

Sustainable Preparation of MIL-100(Fe) and Its Photocatalytic Behavior in the Degradation of Methyl Orange in Water

Revisiting the mechanisms of nitrite ions and ammonia removal from aqueous solutions: photolysis versus photocatalysis

Photocatalytic conversion of nitrite in aqueous solution over nanocomposite photocatalyst Er3+:Y3Al5O12/BiPO4 using different photosources

Contact Info

Product

Resources

About