scholarly journals Carbon Nitride Quantum Dots Modified TiO2 Inverse Opal Photonic Crystal for Solving Indoor VOCs Pollution

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 464
Author(s):  
Jie Yu ◽  
Angel Caravaca ◽  
Chantal Guillard ◽  
Philippe Vernoux ◽  
Liang Zhou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Sol Gel ◽  
Green Energy ◽  
Inverse Opal ◽  
Oxidation Reactions ◽  
Composite Photocatalyst ◽  
Colloidal Photonic Crystals ◽  
Inverse Opal Structure

Indoor toxic volatile organic compounds (VOCs) pollution is a serious threat to people’s health and toluene is a typical representative. In this study, we developed a composite photocatalyst of carbon nitride quantum dots (CNQDs) in situ-doped TiO2 inverse opal TiO2 IO for efficient degradation of toluene. The catalyst was fabricated using a sol-gel method with colloidal photonic crystals as the template. The as-prepared catalyst exhibited excellent photocatalytic performance for degradation of toluene. After 6 h of simulated sunlight irradiation, 93% of toluene can be converted into non-toxic products CO2 and H2O, while only 37% of toluene is degraded over commercial P25 in the same condition. This greatly enhanced photocatalytic activity results from two aspects: (i) the inverse opal structure enhances the light harvesting while providing adequate surface area for effective oxidation reactions; (ii) the incorporation of CNQDs in the framework of TiO2 increases visible light absorption and promotes the separation of photo-generated charges. Collectively, highly efficient photocatalytic degradation of toluene has been achieved. In addition, it can be expanded to efficient degradation of organic pollutants in liquid phase such as phenol and Rhodamine B. This study provides a green, energy saving solution for indoor toxic VOCs removal as well as for the treatment of organic wastewater.

Sulfur-doped graphitic carbon nitride decorated with graphene quantum dots for an efficient metal-free electrocatalyst

2015 ◽  
Vol 3 (5) ◽  
pp. 1841-1846 ◽  
Author(s):  
Chenyu Xu ◽  
Qing Han ◽  
Yang Zhao ◽  
Lixia Wang ◽  
Yang Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Graphene Quantum Dots ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Metal Free ◽  
Carbon Nitride Nanosheets

A rational assembly of graphene quantum dots in situ decorated onto sulfur-doped graphitic carbon nitride nanosheets for an efficient electrocatalyst.

scholarly journals Ag2S quantum dots in situ coupled to hexagonal SnS2 with enhanced photocatalytic activity for MO and Cr(vi) removal

RSC Advances ◽  
2017 ◽  
Vol 7 (74) ◽  
pp. 46823-46831 ◽  
Author(s):  
Jie Liu ◽  
Liquan Jing ◽  
Guofang Gao ◽  
Yuanguo Xu ◽  
Meng Xie ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Composite Photocatalyst ◽  
Highly Efficient ◽  
Visible Light Driven ◽  
Ag2s Quantum Dots

A highly efficient visible-light-driven composite photocatalyst of Ag2S quantum dots coupled to hexagonal SnS2 exhibited considerably increased photocatalytic activity for MO and Cr(vi) removal.

Enhancing photodegradation activity of g-C3N4 via decorating with S-doped carbon nitride quantum dots by in situ polymerization

2020 ◽  
Vol 292 ◽  
pp. 121705 ◽  
Author(s):  
Hongling Li ◽  
Guozhi Huang ◽  
Huazhen Xu ◽  
Zhiqing Yang ◽  
Xinmei Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
In Situ Polymerization

“Hot edges” in an inverse opal structure enable efficient CO2 electrochemical reduction and sensitive in situ Raman characterization

2019 ◽  
Vol 7 (19) ◽  
pp. 11836-11846 ◽  
Author(s):  
Yang Yang ◽  
Lukas Ohnoutek ◽  
Saira Ajmal ◽  
Xiuzhen Zheng ◽  
Yiqing Feng ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Inverse Opal ◽  
In Situ Raman ◽  
Inverse Opal Structure ◽  
Structure Lead ◽  
Raman Characterization

“Hot edges” in a Cu–In monolayer inverse opal structure lead to ultrasensitive Raman signals of the intermediates and efficient electrochemical CO2 reduction performance.

Polyaniline Hybrid with Inverse Opal Structure for Fabrication of Thermoelectric Materials

2014 ◽  
Vol 628 ◽  
pp. 107-110
Author(s):  
Yong Qiang He ◽  
Yan Feng ◽  
Qiao Juan Gong ◽  
Chen Zhong Yao ◽  
Jian Ping Gao ◽  
...  
Keyword(s):  
Colloidal Crystal ◽  
Face Centered Cubic ◽  
Inverse Opal ◽  
Void Space ◽  
Fcc Lattice ◽  
Inverse Opal Structure ◽  
Monodisperse Polystyrene ◽  
Face Centered ◽  
Air Void

The colloidal crystal template or opal with a closed-packed face centered cubic (fcc) lattice was prepared from monodisperse polystyrene (PS) microspheres by gravity sedimentation, and it was used for the fabrication of polyaniline hybrid with inverse opal structure. The template provided void space for the infiltration of Bi2Te3 and monomer that was then in situ polymerized to polyaniline. The opal composite was then soaked in toluene for completely removing PS microspheres to form porous polyaniline hybrid with inverse opal structure. The PS microspheres were replaced by air microspheres, which interconnected each other through the windows on the polyaniline hybrid wall. Both the wall and the air void constitute continuous phases. The polyaniline hybrid with inverse opal structure was observed with scanning electronic microscopy.

Interesting photoluminescence behaviour in graphitic carbon nitride quantum dots attached to PbCrO4 colloidal nanostructures

2020 ◽  
Vol 44 (37) ◽  
pp. 16110-16118
Author(s):  
Tapas Kumar Mondal ◽  
Shyamal K. Saha
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Hydrothermal Route ◽  
Nano Composite ◽  
One Step

Highly luminescent graphitic carbon nitride quantum dots (CNQDs) are synthesized by a facile one-step hydrothermal route and studied the photoluminescence behaviour during in situ formation of CNQD–PbCrO4 nano-composite.

In-Situ Study of NiO Growth on Textured Nickel Tape Using Environmental Scanning Electron Microscope (ESEM) and Hot Stage

2001 ◽  
Vol 7 (S2) ◽  
pp. 1276-1277
Author(s):  
Y. Akin ◽  
R.E. Goddard ◽  
W. Sigmund ◽  
Y.S. Hascicek
Keyword(s):  
Buffer Layer ◽  
Lattice Mismatch ◽  
Sol Gel ◽  
Surface Oxidation ◽  
Dip Coating ◽  
Buffer Layers ◽  
Superconducting Film ◽  
Environmental Scanning ◽  
Cold Rolling And Annealing

Deposition of highly textured ReBa2Cu3O7−δ (RBCO) films on metallic substrates requires a buffer layer to prevent chemical reactions, reduce lattice mismatch between metallic substrate and superconducting film layer, and to prevent diffusion of metal atoms into the superconductor film. Nickel tapes are bi-axially textured by cold rolling and annealing at appropriate temperature (RABiTS) for epitaxial growth of YBa2Cu3O7−δ (YBCO) films. As buffer layers, several oxide thin films and then YBCO were coated on bi-axially textured nickel tapes by dip coating sol-gel process. Biaxially oriented NiO on the cube-textured nickel tape by a process named Surface-Oxidation- Epitaxy (SEO) has been introduced as an alternative buffer layer. in this work we have studied in situ growth of nickel oxide by ESEM and hot stage.Representative cold rolled nickel tape (99.999%) was annealed in an electric furnace under 4% hydrogen-96% argon gas mixture at 1050°C to get bi-axially textured nickel tape.

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