A novel Z-scheme CdS/Bi4O5Br2 heterostructure with mechanism analysis: Enhanced photocatalytic performance

Wang, Cao; Jiang, Caiyun; Chen, Chen; Zhou, Hongxia; Wang, Yuping

doi:10.1016/j.jallcom.2020.158554

Cited by 56 publications

(20 citation statements)

References 53 publications

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“…[43,44] Figure 5d shows the characteristic peaks of Cd 3d 5/2 and Cd 3d 3/2 in Cd 3d,which are at 404.9 eV and 411.7 eV, respectively, and the binding energy between the two characteristic spin orbit components is 6.8 eV, which proves that Cd exists in Cd 2 + state. [45,46] The high-resolution spectra in Figure 5a and 5d confirm that Cd and S are in the sample in the form of CdS. The characteristic peak at 531.6 eV in the O 1s spectrum of Figure 5e is attributed to the CrÀ O bond.…”

Section: Resultsmentioning

confidence: 62%

“…Comparison of MIL-101(Cr) and Ag/CdS/MIL-101(Cr)-0.6, the specific surface area of prepared samples decreased from 915.80 m 2 /g to 123.93 m 2 /g, and the porosity decreased from 0.66 cm 3 /g to 0.26 cm 3 /g, indicating that Ag and CdS were successfully deposited on the surface of MIL-101(Cr) and into the holes of the MIL-101(Cr) matrix. Nevertheless, compared with CdS, [45] Ag/CdS/MIL-101(Cr)-0.6 structure still maintained porous structures and relatively high specific surface area of MIL-101(Cr). The above characteristics can supply more adsorption sites and reactive sites for the photocatalytic reaction.…”

Section: Resultsmentioning

confidence: 97%

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Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

et al. 2021

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MIL-101(Cr) with regular octahedron structure was synthesized by hydrothermal method, and CdS/MIL-101(Cr) was prepared by solution titration. CdS was introduced into the surface of MIL-101(Cr) matrix with large surface area and its pores to make it well dispersed and grow. On this basis, nano-Ag was compounded, and the charge transfer rate was increased and the optical response spectrum of CdS was prolonged by using the localized surface plasmon resonance effect of noble metals. The results showed that under visible light irradiation, Ag/CdS/ MIL-101(Cr)-0.6 ternary composite exhibited excellent photocatalytic H 2 generation rate (521.05 μmol/(g h), which was 1.9 times that of CdS/MIL-101(Cr)-0.4. This provides an idea for the synthesis of other high-performance photocatalytic materials.

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Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 97%

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

et al. 2021

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“…This structure is able to induce the partition (or a certain flux vector) and migration of the photogenerated electrons and holes, preserving at the same time their redox ability under the influence of an internal electric field due to the differences of the Fermi level corresponding to each semiconductor partner [28,29]. If compared with the Z-scheme heterostructure, the S-scheme mechanism is driven by the built-in electric field that is able to reduce the transmission distance of photogenerated carriers based on the synergetic interface between the two semiconductors [41,42]. The Z-scheme disadvantage is represented by the longer transmittance distance that occurs with charge losses during the migration process.…”

Section: S-scheme Heterojunction Mechanismmentioning

confidence: 99%

“…If compared with the Z-scheme heterostructure, the S-scheme mechanism is driven by the built-in electric field that is able to reduce the transmission distance of photogenerated carriers based on the synergetic interface between the two semiconductors [41,42]. The Z-scheme disadvantage is represented by the longer transmittance distance that occurs with charge losses during the migration process.…”

Section: S-scheme Heterojunction Mechanismmentioning

confidence: 99%

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

Eneşca

Andronic

2021

Nanomaterials

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Finding new technologies and materials that provide real alternatives to the environmental and energy-related issues represents a key point on the future sustainability of the industrial activities and society development. The water contamination represents an important problem considering that the quantity and complexity of organic pollutant (such as dyes, pesticides, pharmaceutical active compounds, etc.) molecules can not be efficiently addressed by the traditional wastewater treatments. The use of fossil fuels presents two major disadvantages: (1) environmental pollution and (2) limited stock, which inevitably causes the energy shortage in various countries. A possible answer to the above issues is represented by the photocatalytic technology based on S-scheme heterostructures characterized by the use of light energy in order to degrade organic pollutants or to split the water molecule into its components. The present mini-review aims to outline the most recent achievements in the production and optimization of S-scheme heterostructures for photocatalytic applications. The paper focuses on the influence of heterostructure components and photocatalytic parameters (photocatalyst dosage, light spectra and intensity, irradiation time) on the pollutant removal efficiency and hydrogen evolution rate. Additionally, based on the systematic evaluation of the reported results, several perspectives regarding the future of S-scheme heterostructures were included.

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“…Cadmium sul de (CdS) is one of the relatively inexpensive semiconductors (Bai et al 2020), which has received considerable attention due to its preeminent visible-light response and excellent photocatalytic performance. (Cao et al 2021;Qian et al 2020) Moreover, lots of papers reported utilization of CdS to photo-degradation of MB. (Feng et al 2020;Gobinath et al 2020;Kumar et al 2014) However, the CdS easily suffers from the photo-corrosion in the application.…”

Section: Introductionmentioning

confidence: 99%

CeO2/CdS Heterojunctions Decorated Cotton Fabrics as Facile Recyclable Photocatalysts for Highly Efficient Visible Light Driven Degradation of Methylene Blue

Zou¹,

Li²,

Yang³

et al. 2021

Preprint

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In this work, visible light response CeO2/CdS decorated cotton fabrics as durable and facile recyclable composite photocatalysts were fabricated for photo-degradation of methylene blue (MB). First of all, amino-functionalized CeO2/CdS nanoparticles were synthesized through a fast, efficient and low-cost coprecipitation method. Subsequently, the as-prepared CeO2/CdS nanoparticles were immobilized on aldehyde-functionalized cotton fabric surfaces as composite photocatalysts via "amine-aldehyde" chemical reaction. The surface microstructure and chemical composition of the CeO2/CdS decorated cotton fabric (CeO2/CdS-CF) were characterized by SEM, FTIR and XPS, respectively. The results showed that CeO2/CdS nanoparticles were successfully anchored on the surface of cotton fabric, and distributed uniformly. As expected, the as-prepared CeO2/CdS-CF exhibited excellent photocatalytic activity, which can degrade MB within 90 min with a degradation efficiency of 93.8% under simulated sunlight irradiation, due to the CeO2/CdS heterostructure with the efficient photo-generated charge transfer and separation. In addition, the degradation efficiency remained above 90.3% after five successive degradation cycles, indicating that the obtained CeO2/CdS-CF possessed excellent stability and recyclability. This work opened up a facile preparation way for the fabrication of durable and recyclable composite photocatalysts, and has a promising application in treating dye contaminated wastewater.

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A novel Z-scheme CdS/Bi4O5Br2 heterostructure with mechanism analysis: Enhanced photocatalytic performance

Cited by 56 publications

References 53 publications

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Preparation of Ag/CdS/MIL‐101(Cr) Composite by Dual Solvent Method and Its Photocatalytic Hydrogen Production

Photocatalytic Activity of S-Scheme Heterostructure for Hydrogen Production and Organic Pollutant Removal: A Mini-Review

CeO2/CdS Heterojunctions Decorated Cotton Fabrics as Facile Recyclable Photocatalysts for Highly Efficient Visible Light Driven Degradation of Methylene Blue

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