scholarly journals Sieve-Like CNT Film Coupled with TiO2 Nanowire for High-Performance Continuous-Flow Photodegradation of Rhodamine B under Visible Light Irradiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1335
Author(s):  
Zhengpeng Yang ◽  
Xiaoting Lv ◽  
Xuqing Liu ◽  
Shengmin Jia ◽  
Yongyi Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Light Absorption ◽  
Continuous Flow ◽  
High Performance ◽  
Solar Irradiation ◽  
Polluted Water ◽  
Great Promise ◽  
Flow Mode ◽  
Tio2 Nanowire

Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO2 nanowire film (SCTF) with superior flexibility (180° bending), high tensile strength (75–82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 µm in diameter, as well as a homogenous distribution of TiO2 nanowires with an average diameter of ca. 500 nm, could act as a “waterway” for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min−1. The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.

scholarly journals Synthesis and characterization of Z-scheme heterostructure CoWO4/g-C3N4 as a visible-light photocatalyst for removal of organic pollutant

2021 ◽  
Vol 10 (2) ◽  
pp. 59-63
Author(s):  
Hai Pham Viet ◽  
Anh Dao Thi Ngoc ◽  
Viet Nguyen Minh ◽  
Ha Tran Thi Viet ◽  
Dang Do Van ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
High Performance ◽  
Organic Pollutant ◽  
Photogenerated Electron ◽  
Morphological Properties ◽  
Electron Hole ◽  
Visible Light Photocatalyst ◽  
Photocatalytic Activities

In this study, direct Z–scheme heterostructure CoWO4/g-C3N4 was synthesized by a facile hydrothermal method. The structural, morphological properties of the prepared samples were characterised by XRD, SEM, UV–Vis and PL measurements. The as-obtained heterostructure CoWO4/g-C3N4 exhibited enhanced photocatalytic activities toward the degradation of Rhodamine B under visible light irradiation with 92% Rhodamine B removal after 80 minutes irritation, which exceeded pristine g-C3N4 and CoWO4. The enhanced photocatalytic performance ascribed to interfacial contact between g-C3N4 and CoWO4, thus further inhibiting the recombination of photogenerated electron/hole pairs. It is anticipated that the construction of Z–scheme heterostructure CoWO4/g-C3N4 is an effective strategy to develop high-performance photocatalysts for the degradation of organic pollutants in water.

Tailored near-infrared-emitting colloidal heterostructured quantum dots with enhanced visible light absorption for high performance photoelectrochemical cells

2019 ◽  
Vol 7 (17) ◽  
pp. 10225-10230 ◽  
Author(s):  
Ali Imran Channa ◽  
Xin Tong ◽  
Jing-Yin Xu ◽  
Yongchen Liu ◽  
Changmeng Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Light Absorption ◽  
High Performance ◽  
Near Infrared ◽  
High Efficiency ◽  
Photoelectrochemical Cells ◽  
Visible Light Absorption ◽  
Cds Qds

Near-infrared-emitting CuGaS2/CdS QDs with enhanced visible light absorption were developed to achieve high efficiency photoelectrochemical cells.

High performance visible-light responsive Chl-Cu/ZnO catalysts for photodegradation of rhodamine B

2019 ◽  
Vol 241 ◽  
pp. 359-366 ◽  
Author(s):  
Chayet Worathitanon ◽  
Kuntida Jangyubol ◽  
Preeyaporn Ruengrung ◽  
Waleeporn Donphai ◽  
Wantana Klysubun ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
High Performance

scholarly journals Improving the photocatalytic activity of nitrogen-doped surface defect TiO2-x nanobelts for degradation of organic pollutants

2020 ◽  
pp. 174751982093867
Author(s):  
Zhen Zhang ◽  
Shao-dong Qin ◽  
Jing-yun Chen ◽  
Jing Li ◽  
Ai-hua Xing
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Pollutants ◽  
Rhodamine B ◽  
Light Absorption ◽  
Surface Defect ◽  
Separation Efficiency ◽  
Visible Light Absorption ◽  
Nitrogen Doped ◽  
N Doping

The synthesis of surface defect TiO2-x nanobelts with excellent visible light absorption is important to reduce costs, increase stability, and improve photocatalytic activity. In this work, we report that nitrogen-doped surface defect TiO2-x nanobelts are synthesized by annealing pristine TiO2 nanobelts in Ar/H2 (95%/5%) atmosphere followed by subsequent heat treatment in NH3 at various temperatures. The aim is to study the effect of the extent of the N-doping amount in the lattice of TiO2-x nanobelts on light absorption and photocatalytic activity. Considering the increase in organic pollutants in wastewater, the photocatalytic activity is measured by degrading rhodamine B (RhB) dye in water. The results demonstrate that the calcination temperature affects the doping level of N, and the b-TiO2-N550 sample exhibits higher photocatalytic performance than that of other samples under visible-light irradiation for the degradation of rhodamine B, which is up to 96.11%. The enhancement is ascribed to the synergistic effect of N-doping and self-doping oxygen vacancy (which extend the visible light absorption) and the separation efficiency of photogenerated carriers, which improves the photocatalytic activity.

scholarly journals High-performance monoliths in heterogeneous catalysis with single-phase liquid flow

2017 ◽  
Vol 2 (4) ◽  
pp. 498-511 ◽  
Author(s):  
Christian P. Haas ◽  
Tibor Müllner ◽  
Richard Kohns ◽  
Dirk Enke ◽  
Ulrich Tallarek
Keyword(s):  
Heterogeneous Catalysis ◽  
Liquid Flow ◽  
Continuous Flow ◽  
High Performance ◽  
Single Phase ◽  
Rapid Screening ◽  
Flow Mode ◽  
Reaction Parameters ◽  
On Line ◽  
Phase Liquid

On-line control and monitoring in heterogeneous catalysis utilizing high-performance supports allows rapid screening of intrinsic reaction parameters in continuous-flow mode.

scholarly journals Incorporation of Nonmetal Group Dopants into g-C3N4 Framework for Highly Improved Photocatalytic H2 Production

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1480
Author(s):  
Weinan Xing ◽  
Ke Cheng ◽  
Yichi Zhang ◽  
Jie Ran ◽  
Guangyu Wu
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
High Performance ◽  
Carbon Nitride ◽  
Thermal Polymerization ◽  
H2 Production ◽  
Production Performance ◽  
Polymerization Process ◽  
Environmental Friendly ◽  
Visible Light Photocatalytic

The incorporation of nonmetal group dopants into a graphitic carbon nitride (g-C3N4) framework is fabricated by adding a small amount of hexamethylenetetramine during the thermal polymerization process. The material shows an excellent visible-light photocatalytic H2 production performance that is eight times higher than bulk g-C3N4. This outstanding performance is ascribed to the introducing of N-doped carbon, which not only enhances the light absorption and favorsa narrower band gap, but also upshifts the conductionband (CB) potential, resulting in a better reduction ability of electrons. This discovery has potential significancefor the designing of high performance, economic, and environmental friendly photocatalyst for solar energy conversion.

Structural, elastic, electronic, and optical properties of the tricycle-like phosphorene

2017 ◽  
Vol 19 (3) ◽  
pp. 2245-2251 ◽  
Author(s):  
Yang Zhang ◽  
Zhi-Feng Wu ◽  
Peng-Fei Gao ◽  
Dang-Qi Fang ◽  
Er-Hu Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Structural Stability ◽  
Light Absorption ◽  
Light Harvesting ◽  
Band Gaps ◽  
Great Promise ◽  
Absorption Properties ◽  
Visible Light Absorption ◽  
Nanoelectronic Devices

Tricycle-like phosphorenes with good structural stability, indirect band gaps, flexible properties, and good visible light absorption properties hold great promise for applications in the field of visible light harvesting and flexible nanoelectronic devices.

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