All-solid-state WO3/TQDs/In2S3 Z-scheme heterojunctions bridged by Ti3C2 quantum dots for efficient removal of hexavalent chromium and bisphenol A

Yuan, Zhenting; Huang, Huoshuai; Li, Najun; Chen, Dongyun; Xu, Qingfeng; Li, Hua; He, Jinghui; Lu, Jianmei

doi:10.1016/j.jhazmat.2020.125027

Cited by 69 publications

(30 citation statements)

References 51 publications

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“…As shown in Figure c, the isothermal adsorption–desorption curve of N 2 shows that the Brunauer–Emmett–Teller (BET) surface area of T-CN-TCQDs is as high as 36.7 m 2 /g, which is almost 5 times that of T due to the porous structure of CN and the accumulation of TiO 2 nanoparticles. However, the BET surface area of T-CN-TCQDs is not significantly higher than that of T-CN, which may be caused by the small size of quantum dots . The high specific surface area of T-CN is beneficial to the dispersion of TCQDs, and more light energy is received on the surface and more water molecules are attached, which leads to better catalytic activity …”

Section: Resultsmentioning

confidence: 98%

“…However, the BET surface area of T-CN-TCQDs is not significantly higher than that of T-CN, which may be caused by the small size of quantum dots. 33 The high specific surface area of T-CN is beneficial to the dispersion of TCQDs, and more light energy is received on the surface and more water molecules are attached, which leads to better catalytic activity. 34 To verify the electron transfer path of the samples, density functional theory calculation was carried out for some samples, and the model is shown in Figure S6 (TiO 2 (101), C 3 N 4 (001), Ti 3 C 2 (001)).…”

Section: Resultsmentioning

confidence: 99%

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Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Dong

Zhang

Wang

et al. 2021

ACS Appl. Energy Mater.

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Photocatalytic hydrogen production is a promising technology to alleviate the problems of energy shortage and environmental pollution faced by human society. In this paper, the S-scheme heterojunction TiO 2 /g-C 3 N 4 was modified by Ti 3 C 2 quantum dots (QDs) to prepare a three-dimensional/two-dimensional/zero-dimensional (3D/2D/0D) photocatalyst for photocatalytic hydrogen production. The S-scheme heterojunction structure reduces the recombination rate of photogenerated electron−hole pairs and produces more photogenerated electrons. At the same time, Ti 3 C 2 quantum dots as electron acceptors improve the ability to capture transition electrons, obtain more photogenerated carriers involved in surface reactions, and increase the number of active sites. The TiO 2 /g-C 3 N 4 /Ti 3 C 2 QDs composite catalyst shows excellent photocatalytic hydrogen evolution performance under visible light due to its unique structure and optical properties. The photocatalytic hydrogen production rate reached the maxima of 5540.21 μmol•h −1 g −1 , which is nearly 2 times higher than the production rates observed for TiO 2 /g-C 3 N 4 . The structure of 3D/2D/0D TiO 2 /g-C 3 N 4 /Ti 3 C 2 QDs was constructed, and the electron transfer path was verified by transient absorption spectroscopy and density functional theory calculation. KEYWORDS: TiO 2 /g-C 3 N 4 composites, Ti 3 C 2 quantum dots, S-scheme heterojunction, photocatalytic hydrogen production, DFT calculation

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Dong

Zhang

Wang

et al. 2021

ACS Appl. Energy Mater.

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“…9l). This report shows that MQDs is an ideal co-catalyst to promote the separation of the photogeneration carriers, achieving efficient Cr (VI) reduction and photocatalytic oxidation of the BPA [74]. In addition, the MQDs were used as co-catalyst to promote photocatalytic water splitting due to their broader photoresponse and excellent conductivity.…”

Section: Dmentioning

confidence: 88%

“…For example, the Ti 3 C 2 MQDs have also been used as co-catalyst to prepare Ti 3 C 2 MQDs/SiC nanocomposite [71] (Fig. 22e), all-solid-state WO 3 /TQDs/In 2 S 3 Z-scheme heterostructure [74] and Ni@MQDs [77] nanocomposite photocatalyst, achieving the goal of photocatalytic removal of NO purification and pollutants in water.…”

Section: Photocatalytic Pollutant Degradationmentioning

confidence: 99%

Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis

2022

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It is well known that two-dimensional (2D) MXene-derived quantum dots (MQDs) inherit the excellent physicochemical properties of the parental MXenes, as a Chinese proverb says, “Indigo blue is extracted from the indigo plant, but is bluer than the plant it comes from.” Therefore, 0D QDs harvest larger surface-to-volume ratio, outstanding optical properties, and vigorous quantum confinement effect. Currently, MQDs trigger enormous research enthusiasm as an emerging star of functional materials applied to physics, chemistry, biology, energy conversion, and storage. Since the surface properties of small-sized MQDs include the type of surface functional groups, the functionalized surface directly determines their performance. As the Nobel Laureate Wolfgang Pauli says, “God made the bulk, but the surface was invented by the devil,” and it is just on the basis of the abundant surface functional groups, there is lots of space to be thereof excavated from MQDs. We are witnessing such excellence and even more promising to be expected. Nowadays, MQDs have been widely applied to catalysis, whereas the related reviews are rarely reported. Herein, we provide a state-of-the-art overview of MQDs in catalysis over the past five years, ranging from the origin and development of MQDs, synthetic routes of MQDs, and functionalized MQDs to advanced characterization techniques. To explore the diversity of catalytic application and perspectives of MQDs, our review will stimulate more efforts toward the synthesis of optimal MQDs and thereof designing high-performance MQDs-based catalysts.

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“…Several fluorescent nanomaterials have been used as efficient materials in areas such as life science and material science. [12][13][14][15] The as-prepared fluorescent nanomaterials, including carbon dots (CDs) and upconversion particles (UCNPs), exhibit high quantum yield and water solubility, lower detection limitation, and a fast response time. However, great challenges remain, especially cruel reaction conditions such as high temperature and pressure and time-consuming reactions, which are very dangerous and can regularly cause accidents.…”

Section: Introductionmentioning

confidence: 99%

A Facile Strategy for the Preparation of Carboxymethylcellulose‐Derived Polymer Dots and Their Application to Detect Tetracyclines

Zhang

Wang

Yang

2021

Macro Chemistry & Physics

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Developing nonconjugated fluorescent polymer dots based on cellulose materials through a simple and economical method is of high value for sensing or imaging. However, great challenges are still being suffered. Herein, strong blue‐green emission water‐soluble cellulose polymer dots (CPDs) are synthesized with excellent stability using carboxymethyl cellulose (CMC) and citric acid (CA) as precursors via a mild reaction and facile synthesis process. Near‐spherical nanoparticles with an average size of approximately 11.3 nm and quantum yield of 11.5% are obtained. Importantly, CPDs can be utilized as an excellent fluorescent probe for the detection of tetracyclines (TCs) in aqueous solutions through fluorescence quenching via the inner filter effect. The detection limit for fluorescent CPDs for TC detection is found to be as low as 4.1 × 10‐9 m, and two good linear relationships for TC concentration ranging from 51.8 × 10‐9 to 256.8 × 10‐9 m (R2 = 0.996) and 0 × 10‐6 to 15.3 × 10‐6 m (R2 = 0.997) are obtained. Finally, the fluorescent CPD fluorescent probe is successfully utilized to detect TC in real samples, including tap water, milk, and river water.

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All-solid-state WO3/TQDs/In2S3 Z-scheme heterojunctions bridged by Ti3C2 quantum dots for efficient removal of hexavalent chromium and bisphenol A

Cited by 69 publications

References 51 publications

Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis

A Facile Strategy for the Preparation of Carboxymethylcellulose‐Derived Polymer Dots and Their Application to Detect Tetracyclines

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All-solid-state WO3/TQDs/In2S3 Z-scheme heterojunctions bridged by Ti3C2 quantum dots for efficient removal of hexavalent chromium and bisphenol A

Cited by 69 publications

References 51 publications

Ti3C2 Quantum Dots Modified 3D/2D TiO2/g-C3N4 S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Ti3C2 Quantum Dots Modified 3D/2D TiO2/g-C3N4 S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Quantum Dots Compete at the Acme of MXene Family for the Optimal Catalysis

A Facile Strategy for the Preparation of Carboxymethylcellulose‐Derived Polymer Dots and Their Application to Detect Tetracyclines

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Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution

Ti₃C₂ Quantum Dots Modified 3D/2D TiO₂/g-C₃N₄ S-Scheme Heterostructures for Highly Efficient Photocatalytic Hydrogen Evolution