KCl-mediated dual electronic channels in layered g-C3N4 for enhanced visible light photocatalytic NO removal

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 8066-8074 ◽  
Author(s):  
Ting Xiong ◽  
Hong Wang ◽  
Ying Zhou ◽  
Yanjuan Sun ◽  
Wanglai Cen ◽  
...  
Keyword(s):  
Visible Light ◽  
Recombination Rate ◽  
Charge Carriers ◽  
Electron Hole ◽  
No Removal ◽  
Electronic Channel ◽  
Hole Recombination ◽  
Electronic Channels ◽  
Co Doped ◽  
Visible Light Photocatalytic

K and Cl ions co-doped into a g-C3N4 interlayer function as a dual electronic channel for electron and hole transfer, thus effectively decreasing the electron–hole recombination rate and prolonging the lifetime of charge carriers.

Synthesis, characterization and enhanced visible-light photocatalytic activity of novel NiO/HTi2NbO7nanocomposite

2018 ◽  
Vol 42 (12) ◽  
pp. 10279-10289 ◽  
Author(s):  
Jie Li ◽  
Lei Xu ◽  
Jie He ◽  
Lifang Hu ◽  
Liangguo Da ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Recombination Rate ◽  
Crucial Role ◽  
Electron Hole ◽  
Visible Light Photocatalytic Activity ◽  
Hole Recombination ◽  
Visible Light Photocatalytic

The decreased electron–hole recombination rate of the NiO/HTi2NbO7nanocomposite plays a crucial role in improving visible-light photocatalytic activity.

In situ bubble template promoted facile preparation of porous g-C3N4 with excellent visible-light photocatalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63264-63270 ◽  
Author(s):  
Lei Shi ◽  
Lin Liang ◽  
Fangxiao Wang ◽  
Mengshuai Liu ◽  
Tao Liang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Recombination Rate ◽  
Photocatalytic Performance ◽  
Electron Hole ◽  
Facile Preparation ◽  
Bubble Template ◽  
Splitting Water ◽  
Visible Light Photocatalytic

pg-C3N4 prepared through in situ bubble template showed large surface area and low recombination rate of photoinduced electron–hole pairs, leading to enhanced visible-light photocatalytic activity for degrading pollutants and splitting water to H2.

Synergic effects of upconversion nanoparticles NaYbF4:Ho3+ and ZrO2 enhanced the efficiency in hole-conductor-free perovskite solar cells

Nanoscale ◽  
2018 ◽  
Vol 10 (46) ◽  
pp. 22003-22011 ◽  
Author(s):  
Yanyan Li ◽  
Li Zhao ◽  
Meng Xiao ◽  
Yimin Huang ◽  
Binghai Dong ◽  
...  
Keyword(s):  
Solar Cells ◽  
Visible Light ◽  
Recombination Rate ◽  
Perovskite Solar Cells ◽  
Upconversion Nanoparticles ◽  
Electron Hole ◽  
Dual Functional ◽  
Nir Light ◽  
Hole Recombination

This design enabled the dual-functional effects, that is, the harvesting of NIR light and its conversion to visible light and the reduction of the electron–hole recombination rate.

scholarly journals Improved Organic Dye Degradation Using Highly Efficient MXene Composites

2018 ◽  
Author(s):  
M. Abdullah Iqbal ◽  
S. Irfan Ali ◽  
Ayesha Tariq ◽  
Mohammad Z. Iqbal ◽  
Syed Rizwan
Keyword(s):  
Surface Area ◽  
Recombination Rate ◽  
Dye Degradation ◽  
Organic Pollutant ◽  
Sol Gel ◽  
Transition Metal Carbide ◽  
Light Spectrum ◽  
Electron Hole ◽  
Hole Recombination ◽  
Co Doped

Over the years, scarcity of fresh potable water has increased the demand for clean water. Meanwhile, with the advent of nanotechnology, the use of nanomaterials for photocatalytic degradation of pollutants in wastewaters has increased. Herein, a new type of nanohybrids of La and Mn co-doped bismuth ferrite (BiFeO3) nanoparticles embedded into transition metal carbide sheets (MXene) were prepared by a low-cost double solvent sol-gel method, and investigated for their photocatalytic activity. The photoluminescence results showed that pure BFO has highest electron hole recombination rate as compared to all the co-doped BFO/MXene nanohybrids. The larger surface area and higher electron-hole pair generation rate provides suitable environment for fast photo-degradation of organic molecules. The band gap of the prepared nanohybrids was tuned to 1.96 eV having largest BiFeO3 surface area (147 m2g−1) reported till date. Moreover, the BLFO/MXene and BLFMO-5/Mxene degraded the 92% organic pollutant from water in dark and remaining in light spectrum as compare to undoped BFO/Mxene due to enhancement of the surface area and electron-hole recombination rate upon doping. Therefore, these synthesized nanohybrids could be a promising candidate for photocatalytic applications in future.

One-pot synthesis of heterostructured Bi2S3/BiOBr microspheres with highly efficient visible light photocatalytic performance

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16239-16249 ◽  
Author(s):  
Hong-Peng Jiao ◽  
Xiang Yu ◽  
Zhao-Qing Liu ◽  
Pan-Yong Kuang ◽  
Yuan-Ming Zhang
Keyword(s):  
Visible Light ◽  
Fast Electron ◽  
Photocatalytic Performance ◽  
Solvothermal Method ◽  
Photocatalytic Efficiency ◽  
Electron Hole ◽  
One Pot ◽  
One Pot Synthesis ◽  
Hole Recombination ◽  
Visible Light Photocatalytic

To overcome the drawback of low photocatalytic efficiency brought by fast electron–hole recombination and narrow photoresponse range, the heterostructured Bi2S3/BiOBr microspheres were designed and synthesized via a facile one-pot solvothermal method.

scholarly journals Construction of Ag3PO4/SnO2 Heterojunction on Carbon Cloth with Enhanced Visible Light Photocatalytic Degradation

2020 ◽  
Vol 10 (9) ◽  
pp. 3238
Author(s):  
Min Liu ◽  
Guangxin Wang ◽  
Panpan Xu ◽  
Yanfeng Zhu ◽  
Wuhui Li
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Carbon Cloth ◽  
Electron Hole ◽  
Step Process ◽  
Photogenerated Electrons ◽  
Rapid Transfer ◽  
Visible Light Photocatalytic

In this study, the Ag3PO4/SnO2 heterojunction on carbon cloth (Ag3PO4/SnO2/CC) was successfully fabricated via a facile two-step process. The results showed that the Ag3PO4/SnO2/CC heterojunction exhibited a remarkable photocatalytic performance for the degradation of Rhodamine B (RhB) and methylene blue (MB), under visible light irradiation. The calculated k values for the degradation of RhB and MB over Ag3PO4/SnO2/CC are 0.04716 min−1 and 0.04916 min−1, which are higher than those calculated for the reactions over Ag3PO4/SnO2, Ag3PO4/CC and SnO2/CC, respectively. The enhanced photocatalytic activity could mainly be attributed to the improved separation efficiency of photogenerated electron-hole pairs, after the formation of the Ag3PO4/SnO2/CC heterojunction. Moreover, carbon cloth with a large specific surface area and excellent conductivity was used as the substrate, which helped to increase the contact area of dye solution with photocatalysts and the rapid transfer of photogenerated electrons. Notably, when compared with the powder catalyst, the catalysts supported on carbon cloth are easier to quickly recycle from the pollutant solution, thereby reducing the probability of recontamination.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

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