scholarly journals Visible Light-Responsive N-Doped TiO2 Photocatalysis: Synthesis, Characterizations, and Applications

2021 ◽  
Author(s):  
Shiwen Du ◽  
Juhong Lian ◽  
Fuxiang Zhang
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Environmental Remediation ◽  
Solar Spectrum ◽  
Light Response ◽  
Physicochemical Characteristics ◽  
Energy Utilization ◽  
As Doping ◽  
Energy Applications ◽  
Recent Developments

AbstractPhotocatalysis based on semiconductors has recently been receiving considerable research interest because of its extensive applications in environmental remediation and renewable energy generation. Various semiconductor-based materials that are vital to solar energy utilization have been extensively investigated, among which titanium oxide (TiO2) has attracted considerable attention because of its exceptional physicochemical characteristics. However, the sluggish responsiveness to visible light in the solar spectrum and the inefficient separation of photoinduced electron–hole pairs hamper the practical application of TiO2 materials. To overcome the aforementioned serious drawbacks of TiO2, numerous strategies, such as doping with foreign atoms, particularly nitrogen (N), have been improved in the past few decades. This review aims to provide a comprehensive update and description of the recent developments of N-doped TiO2 materials for visible light-responsive photocatalysis, such as (1) the preparation of N-doped/co-doped TiO2 photocatalysts and (2) mechanistic studies on the reasons for visible light response. Furthermore, the most recent and significant advances in the field of solar energy applications of modified N-doped TiO2 are summarized. The analysis indicated the critical need for further development of these types of materials for the solar-to-energy conversion, particularly for water splitting purposes.

Light manipulation in a dually ordered porous TiO2–rGO composite for efficient solar energy utilization

2017 ◽  
Vol 4 (4) ◽  
pp. 578-580 ◽  
Author(s):  
Xiaoyong Lai
Keyword(s):  
Solar Energy ◽  
Light Response ◽  
Energy Utilization ◽  
Porous Tio2 ◽  
Light Manipulation ◽  
Solar Energy Utilization ◽  
Ordered Porous

A dually ordered macro-mesoporous TiO2–rGO composite with tunable light response was developed for efficient solar energy utilization.

Interfacial restructuration of carbon nitride polymers for visible-light photocatalysis

2019 ◽  
Vol 55 (57) ◽  
pp. 8235-8237 ◽  
Author(s):  
Feng Lin ◽  
Zihao Yu ◽  
Xinchen Wang
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Carbon Nitride ◽  
Practical Importance ◽  
Energy Utilization ◽  
Visible Light Photocatalysis ◽  
Solar Energy Utilization

Photocatalyst surface restructuration is of immense practical importance for solar energy utilization.

scholarly journals Effect of Ti doping on mechanical and optical properties of super-hard I2d-CN2 materials

RSC Advances ◽  
2017 ◽  
Vol 7 (60) ◽  
pp. 37943-37951 ◽  
Author(s):  
Ze-Cheng Zhao ◽  
Chuan-Lu Yang ◽  
Mei-Shan Wang ◽  
Xiao-Guang Ma ◽  
Li-Bo Zhan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Energy ◽  
Visible Light ◽  
Formation Energy ◽  
High Hardness ◽  
Light Response ◽  
Energy Harvest ◽  
Visible Light Range ◽  
Ti Doping

The Ti-doped I2d-CN2 structures are favorable solar energy harvest or light-response materials due to their lower formation energy, high hardness and large absorption in the infrared and visible light range.

scholarly journals Photocatalytic Degradation of Diazinon with a 2D/3D Nanocomposite of Black Phosphorous/Metal Organic Framework

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 679
Author(s):  
Philani V. Hlophe ◽  
Langelihle N. Dlamini
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Environmental Remediation ◽  
Electrochemical Impedance ◽  
Solar Spectrum ◽  
Black Phosphorus ◽  
X Ray ◽  
Visible Light Driven ◽  
Metal Organic

Metal–organic frameworks (MOFs) are promising materials for the removal and photodegradation of pesticides in water. Characteristics such as large surface area, crystalline structure and catalytic properties give MOFs an advantage over other traditional adsorbents. The application of MOFs in environmental remediation is hindered by their ability to only absorb in the UV region. Therefore, combining them with an excellent charge carrier 2D material such as black phosphorus (BP) provides an attractive composite for visible-light-driven degradation of pesticides. In the study, a nanocomposite of black phosphorus and MIL-125(Ti), defined as BpMIL, was prepared using a two-stage hydrothermal and sonication route. The as-prepared composite was characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and photoluminescence (PL) spectroscopy. These techniques revealed that the circular and sheet-like morphology of the nanocomposites had minimum charge recombination, allowing them to be effective photocatalysts. Furthermore, the photocatalysts exhibited extended productive utilization of the solar spectrum with inhibited recombination rate and could be applied in visible-light-driven water treatment. The photodegradation of diazinon in water was studied using a series of BpMIL (4%, 6% and 12% by mass) nanocomposites as a photocatalyst. The optimal composite was determined to be 4%BpMIL. The degradation parameters were optimized and these included photocatalyst dosage, initial diazinon concentration and pH of the solution. The optimal conditions for the removal and degradation of diazinon were: neutral pH, [diazinon] = 20 mg/L, photocatalyst dosage = 0.5 g/L, achieving 96% removal of the pesticide after 30 min with 4%BpMIL, while MIL-125(Ti) showed 40% removal. The improved photodegradation efficiency of the 4%BpMIL composite was attributed to Ti3+-Ti4+ intervalence electron transfer and the synergistic effect between MIL-125(Ti) and BP. The photodegradation followed pseudo-first-order kinetics with a rate constant of 1.6 × 10−2 min−1.

scholarly journals The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 139 ◽  
Author(s):  
Xiaohong Yang ◽  
Yan Wang ◽  
Lingtong Zhang ◽  
Haitao Fu ◽  
Peng He ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Environmental Remediation ◽  
Noble Metals ◽  
Incident Light ◽  
Perfect Match ◽  
Energy Utilization ◽  
Plasmonic Enhancement ◽  
Research Attention ◽  
Tio2 Particles

Exploring solar-excited heterogeneous photocatalysts by taking advantage of surface plasmon resonance (SPR) has drawn growing research attention. As it could help to pave the way for global sustainable development. The decoration of TiO2 particles with noble metals possessing SPR effects is regarded as one of the most effective solutions. The perfect match of the SPR absorption band with the spectrum of incident light is an essential factor for plasmonic enhancement. However, modifying with sole noble metal is often limited as it tunes wavelength of only several nanometers. To overcome this drawback, an alternative approach can be offered by decoration with more than one noble metal. For instance, Au-Ag co-decoration displays greatly adjustable, composition-dependent SPR agent over a broad range of the visible light spectrum (ca. from 415 to 525 nm). Hence Au-Ag complex is a remarkable candidate for tuning the photo adsorption of TiO2 from UV to visible light. This study presents a novel and tailored method for the fabrication of Au-Ag co-modified TiO2 particles, and how Au-Ag dependent SPR was applied as the visible light-responsive TiO2 based photocatalysts in a simple but reliable way. The fabricated Au-Ag co-decorated TiO2 (AuxAg(1−x)/TiO2) was characterized and proved to own excellent stability and large specific surface area. The optimization of these particles against the wavelength of maximal solar light intensity was confirmed by photo degradation of methylene blue under visible light radiation. This work may provide further insight into the design of TiO2-based composites with improved photocatalytic properties for environmental remediation and renewable energy utilization.

Recent Advances in g-C3N4-based Photocatalysts Incorporated by MXenes and Their Derivatives

2021 ◽  
Author(s):  
Huilin Hou ◽  
Gang Shao ◽  
Weiyou Yang
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Energy Conversion ◽  
Environmental Remediation ◽  
Carbon Nitride ◽  
Solar Energy Conversion ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Two Dimensional ◽  
Recent Advances

As one of fascinating visible-light-responsive photocatalysts, the two-dimensional (2D) graphitic carbon nitride (g-C3N4) has drawn broad attention in the field of solar energy conversion and environmental remediation. However, its intrinsic...

Demonstration of Thermophotovoltaics for a Full-Spectrum Solar Energy System

Solar Energy ◽  
2004 ◽  
Author(s):  
Dan Dye ◽  
Byard Wood ◽  
Lewis Fraas ◽  
Jeanette Kretschmer
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Gallium Antimonide ◽  
Solar Spectrum ◽  
Experimental Tests ◽  
Energy System ◽  
Collection System ◽  
Full Spectrum ◽  
Experimental Apparatus ◽  
Array Performance

A non-imaging (NI) device and thermophotovoltaic (TPV) array for use in a full-spectrum solar energy system has been designed, built, and tested [1,2,3]. This system was designed to utilize the otherwise wasted infrared (IR) energy that is separated from the visible portion of the solar spectrum before the visible light is harvested. The IR energy will be converted to electricity via a gallium antimonide (GaSb) TPV array. The experimental apparatus for the testing of the IR optics and TPV performance is described. Array performance data will be presented, along with a comparison between outdoor experimental tests and laboratory flash tests. An analysis of the flow of the infrared energy through the collection system will be presented, and recommendations will be made for improvements. The TPV array generated a maximum of 26.7 W, demonstrating a conversion efficiency of the IR energy of 12%.

Sign in / Sign up

Export Citation Format

Share Document