Synthesis of CdS with chitosan for photodegradation to rhodamine B

Yue, Wenjin; Wang, Ziyao; Zhen, Wang; Xu, Qingfeng; Chen, Zheng; Zha, Xiaoqian; Gui, Huanhuan; Zhang, Hao

doi:10.1007/s11051-021-05143-2

Cited by 17 publications

(9 citation statements)

References 60 publications

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“…45 Besides, Figure 2f reveals the spectrum of S 2p of NF-TiO 2 / CdS x , and the peaks at 160.8 and 161.7 eV are attributed to S 2p 3/2 and S 2p 1/2 for NF-TiO 2 /CdS 0.6 , respectively. 46,47 Also, the binding energies show the negative shift of Cd 3d and S 2p as compared with that of bare CdS, 48 showing the electron transfer from TiO 2 to CdS, which is in agreement with the results of Ti 2p and O 1s. Based on these results above, the presence of Ti 3+ defects and the strong electronic interaction between NF-TiO 2 and CdS in NF-TiO 2 /CdS 0.6 are clearly confirmed, both of which are beneficial for the enhanced photocatalytic CO 2 reduction in view of the adsorption of CO 2 and the effective suppression of recombination of photogenerated electrons and holes.…”

Section: ■ Results and Discussionsupporting

confidence: 86%

Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products

Bai

Liu

et al. 2022

Ind. Eng. Chem. Res.

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Photocatalytic CO 2 reduction is a promising route to simultaneously address two critical issues related to the energy and environment. Herein, a direct Z-scheme photocatalytic system, Ti 3+ defective TiO 2 /CdS nanoflowers, was fabricated to enhance the production of C1−C3 products from CO 2 reduction. First, nanoflowerlike TiO 2 (NF-TiO 2 ) is prepared using a TiB 2 precursor to build in Ti 3+ defects. Then, the NF-TiO 2 /CdS heterojunctions are constructed via the sulfurization of TiO 2 /Cd-MOF. Importantly, the optimal heterojunction photocatalyst NF-TiO 2 /CdS 0.6 exhibits a highly promoted CO 2 reduction activity not only for CO and CH 4 but also for C2−C3 hydrocarbons. The cumulative yields of CO and CH 4 are 1007.0 μmol/g and 83.5 μmol/g (2.5 h), respectively, and a yield of 55.3 μmol/g (2.5 h) of C2−C3 hydrocarbons is obtained. This enhanced yield of C1−C3 products is attributed to the synergistic effects of abundant Ti 3+ defects that increase adsorption and activation of CO 2 , the large surface area that provides sufficient active sites, and a direct Z-scheme heterojunction with a good intimate contact interface that effectively separates charge carriers and accumulates electrons with strong reducibility. Moreover, the photoluminescence analysis of hydroxyl radicals was conducted to provide evidence for the direct Zscheme mechanism. This work provides a facile method for the construction of a TiO 2 -based direct Z-scheme photocatalytic system for improving photocatalytic performance toward CO 2 reduction.

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Section: ■ Results and Discussionsupporting

confidence: 86%

Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products

Bai

Liu

et al. 2022

Ind. Eng. Chem. Res.

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“…The C=O of primary and secondary amides stretch at 1646 and 1583 cm −1 , respectively. In addition, the NH bending and stretching vibrations of amide I overlapped at 1583 cm −1 [28,30]. The features of the C-H chains' side bending and NH 2 wagging appear in the observed IR peak at 1419 cm −1 .…”

Section: Ftir Molecular Structure Characterizationmentioning

confidence: 87%

“…The IR peak positions and their corresponding molecular vibration identification are illustrated in Table 1. The detected IR peaks of pure Cs are well-defined, with a high degree of deacetylation (DD %) of about 81.25% [28,29]. The observed IR band in the range of (3356-3293) cm −1 is attributed to two overlapped stretching vibrations of -OH and -NH [30,31].…”

Section: Ftir Molecular Structure Characterizationmentioning

confidence: 89%

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

et al. 2023

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The necessity for reliable and efficient multifunctional optical and optoelectronic devices is always calling for the exploration of new fertile materials for this purpose. This study leverages the exploitation of dyed environmentally friendly biopolymeric thin films as a potential optical absorber in the development of multifunctional opto-(electronic) and solar cell applications. Uniform, stable thin films of dyed chitosan were prepared using a spin-coating approach. The molecular interactivity between the chitosan matrix and all the additive organic dyes was evaluated using FTIR measurements. The color variations were assessed using chromaticity (CIE) measurements. The optical properties of films were inspected using the measured UV-vis-NIR transmission and reflection spectra. The values of the energy gap and Urbach energy as well as the electronic parameters and nonlinear optical parameters of films were estimated. The prepared films were exploited for laser shielding as an attenuated laser cut-off material. In addition, the performance of the prepared thin films as an absorbing organic layer with silicon in an organic/inorganic heterojunction architecture for photosensing and solar energy conversion applicability was studied. The current-voltage relation under dark and illumination declared the suitability of this architecture in terms of responsivity and specific detectivity values for efficient light sensing applications. The suitability of such films for solar cell fabrications is due to some dyed films achieving open-circuit voltage and short-circuit current values, where Saf-dyed films achieved the highest Voc (302 mV) while MV-dyed films achieved the highest Jsc (0.005 mA/cm2). Finally, based on all the obtained characterization results, the engineered natural cost-effective dyed films are considered potential active materials for a wide range of optical and optoelectronic applications.

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“…The survey spectrum of XPS (Fig. 7b) displayed not only the element of cadmium and sulphur, but also that of oxygen and carbon which were originated from adsorbed O 2 and CO 2 molecules in the atmosphere [20,22]. Cd spectrum revealed two peaks located at 405.25 eV and 411.95 eV assigning to the binding energy of Cd3d 3/2 and Cd3d 5/2 (as shown in Fig.…”

Section: Crystal Phase and Compositionmentioning

confidence: 95%

Hydrazine-induced synthesis of CdS nanorings for the application in photodegradation

Zheng

Wang

et al. 2023

Res Chem Intermed

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In this paper, CdS nanorings synthesized by facile hydrazine-induced microwave method for the photodegradation of pollutants has been reported for the rst time. Different reaction method, microwave power, the category and dosage of pH regulating reagent, reaction temperature and reaction time were investigated. The formation of CdS nanorings from the self-assembly of nanoparticles was attributed to the coordination of hydrazine producing the dipole-dipole interaction among the uniform nanoparticles obtained by microwave method. The crystal phase, composition, morphology and surface property of CdS nanorings were characterized. The results showed that 100 nm-sized wurtzite CdS nanorings with positive surface charges formed by the self-assembly of 5-8 nm nanoparticles, which presented mesoporous structures with maximum pore size of 52 nm. To study the in uence of ring-like structures on the photocatalysis, the photodegradation of rhodamine B (RhB) by CdS nanorings and nanoparticles were compared. The results showed that, CdS nanorings displayed higher photodegradation e ciency, which were originated from favorable band edge potential and obviously more effective electron-hole separation producing more superoxide radical and holes as active speci es. The photodegradation path of RhB contains the process as the demethylation, the decarboxylation process, the chromophore cleavage and ring-open reactions. Finally, the available photodegradation of multiple pollutants and reusability of CdS nanorings were carried out.

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Synthesis of CdS with chitosan for photodegradation to rhodamine B

Cited by 17 publications

References 60 publications

Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products

Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

Hydrazine-induced synthesis of CdS nanorings for the application in photodegradation

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Synthesis of CdS with chitosan for photodegradation to rhodamine B

Cited by 17 publications

References 60 publications

Ti3+ Defective TiO2/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO2 Reduction to C1–C3 Products

Ti3+ Defective TiO2/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO2 Reduction to C1–C3 Products

Fabrication and Characterization of Eco-Friendly Thin Films as Potential Optical Absorbers for Efficient Multi-Functional Opto-(Electronic) and Solar Cell Applications

Hydrazine-induced synthesis of CdS nanorings for the application in photodegradation

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Product

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Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products

Ti³⁺ Defective TiO₂/CdS Z-Scheme Photocatalyst for Enhancing Photocatalytic CO₂ Reduction to C1–C3 Products