Construction of Z-scheme 1D/2D FeV3O8/g-C3N4 composite for ibuprofen degradation: Mechanism insight, theoretical calculation and degradation pathway

2021 ◽  
Author(s):  
Shuai Mao ◽  
Chun Liu ◽  
Mingzhu Xia ◽  
Xuehai Ju ◽  
Fengyun Wang
Keyword(s):  
Theoretical Calculation ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Degradation Mechanism ◽  
Degradation Pathway ◽  
Composite Photocatalyst ◽  
Carrier Recombination

Graphite carbon nitride (g-C3N4) is a common photocatalyst, but it only shows limited photocatalytic performance due to its inherent carrier recombination. Hence, a novel 1D/2D FeV3O8 nanorod/g-C3N4 nanosheets composite photocatalyst...

Facile synthesis and enhanced visible-light photocatalytic activity of graphitic carbon nitride decorated with ultrafine Fe2O3 nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92033-92041 ◽  
Author(s):  
Xin Liu ◽  
Ailing Jin ◽  
Yushuai Jia ◽  
Junzhe Jiang ◽  
Na Hu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Precipitation Method ◽  
Fe2o3 Nanoparticles ◽  
Facile Synthesis ◽  
Composite Photocatalyst ◽  
Visible Light Photocatalytic

An efficient composite photocatalyst fabricated by dispersing ultrafine Fe2O3 nanocrystals onto g-C3N4 nanosheets via a facile deposition-precipitation method shows significantly enhanced photocatalytic performance under visible light irradiation.

scholarly journals The Research on the Construction and the Photocatalytic Performance of BiOI/NH2-MIL-125(Ti) Composite

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 24
Author(s):  
Juan Du ◽  
Jiaxin Zhang ◽  
Tingyu Yang ◽  
Renming Liu ◽  
Zhiyi Li ◽  
...  
Keyword(s):  
High Stability ◽  
Diffuse Reflectance ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Solvothermal Method ◽  
Degradation Mechanism ◽  
Active Species ◽  
Absorption Region ◽  
Composite Photocatalyst ◽  
Recombination Efficiency

The BiOI/NH2-MIL-125(Ti) composite photocatalyst with excellent photocatalytic performance was prepared by the solvothermal method. For the BiOI/NH2-MIL-125(Ti) (BNMT) system, the contents of NH2-MIL-125(Ti) in BNMT-4, BNMT-5, BNMT-7, BNMT-9, and BNMT-10 were 4 wt %, 5 wt %, 7 wt %, 9 wt %, and 10 wt %, respectively. XRD, XPS, SEM, and TEM characterizations indicated that BiOI/NH2-MIL-125(Ti) was successfully prepared. Brunauer, Emmett, and Teller (BET) and UV–vis diffuse reflectance spectra photoelectrochemical analysis indicated that BNMT-9 can make the specific surface area and photo absorption region larger than BiOI. In addition, the separation efficiency of photogenerated carriers was improved, and the recombination efficiency was reduced. The degradation percentages of Rhodamine B (RhB) and p-chlorophenol (P-CP) reached 99% and 90% over BNMT-9 under visible light irradiation. Additionally, the catalysts had high stability. The results of the active spices trapping experiments test indicated that h+ was the main active species. The possible degradation mechanism was proposed.

scholarly journals Functionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyes

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1106 ◽  
Author(s):  
Álvaro Pérez-Molina ◽  
Sergio Morales-Torres ◽  
Francisco J. Maldonado-Hódar ◽  
Luisa M. Pastrana-Martínez
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Photocatalytic Performance ◽  
Degradation Mechanism ◽  
Degradation Pathway ◽  
Functionalized Graphene ◽  
Solution Ph ◽  
Simulated Solar Light ◽  
Graphene Derivatives ◽  
Repulsive Forces

Functionalized graphene derivatives including graphene oxide (GO), reduced graphene oxide (rGO), and heteroatom (nitrogen/sulphur (N/S) or boron (B))-doped graphene were used to synthesize composites with TiO2 (T). The photocatalytic performance of composites was assessed for the degradation of Orange G dye (OG) under simulated solar light. All the prepared graphene derivatives—TiO2 composites showed better photocatalytic performance than bare TiO2. A higher photocatalytic activity was found for the composites containing GO and N/S co-doped rGO (kapp = 109.2 × 10−3 and 48.4 × 10−3 min−1, for GO-T and rGONS-T, respectively). The influence of both initial solution pH and the reactive species involved in the OG degradation pathway were studied. The photocatalytic activity of the samples decreased with the increase of the initial pH (from 3.0 to 10.0) due to the occurrence of electrostatic repulsive forces between the photocatalysts surface and the molecules of OG, both negatively charged. The use of selective scavengers showed that although the photogenerated holes dominate the degradation mechanism, radicals and singlet oxygen also participate in the OG degradation pathway. In addition, reutilization experiments indicated that the samples were stable under the reaction conditions used.

scholarly journals Photocatalytic Performance of Alkaline Activated Graphitic Carbon Nitride Under Blue LED Light

2021 ◽  
pp. X
Author(s):  
Yong OUYANG ◽  
Jianquan XU ◽  
Aiyu YANG ◽  
Caixia ZHONG ◽  
Wenjing HU ◽  
...  
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Active Sites ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Organic Dyes ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Simple Method ◽  
Carrier Recombination

Graphitic carbon nitride (g-C3N4) is a metal-free photocatalyst with visible light response. However, the disadvantages limit its application in a wider range, such as its small specific surface areas, fewer active sites, narrow visible light absorption range and high photogenic carrier recombination. In this paper, NaOH was used as activator for alkaline activation of g-C3N4. The phase composition, micromorphology, surface chemical state and optical properties of g-C3N4 after activation were tested. The photocatalytic performance of g-C3N4 over organic dyes was also tested. The results showed that Na+ entered the interlayers of g-C3N4, expanding the spaces between layers. The specific surface area and pore volume of powder were increased. The active sites were increased. The band gap was decreased, and the photogenic carrier recombination was reduced. Alkaline activated g-C3N4 had better adsorption and degradation performance over rhodamine B and methyl orange than inactivated g-C3N4. Therefore, the alkaline activated g-C3N4 promotes its further application in the field of wastewater treatment. This work sheds light on the material modification through a simple method with the aim to efficiently use solar energy.

Loading SnS2 nanosheets decorated with MoS2 nanoparticles on a flake-shaped g-C3N4 network for enhanced photocatalytic performance

CrystEngComm ◽  
2021 ◽  
Author(s):  
Changzhao Chen ◽  
Jiyuan Zang ◽  
Qian Wang ◽  
Yuanzhi Li
Keyword(s):  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Composite Photocatalyst ◽  
Mos2 Nanoparticles

Despite the significant amount of research on the field of graphitic carbon nitride (g-C3N4) photocatalysis, there is still a long way to develop a g-C3N4-based composite photocatalyst with high visible...

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.

In situ construction of WO3/g-C3N4 composite photocatalyst with 2D–2D heterostructure for enhanced visible light photocatalytic performance

2019 ◽  
Vol 43 (44) ◽  
pp. 17416-17422 ◽  
Author(s):  
Huaqiang Zhuang ◽  
Zhenping Cai ◽  
Wentao Xu ◽  
Mianli Huang ◽  
Xiaobin Liu
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Composite Photocatalyst ◽  
Preparation Strategy ◽  
Visible Light Photocatalytic

A WO3/g-C3N4 composite photocatalyst with 2D–2D heterostructure was designed and constructed by an in situ preparation strategy.

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