Construction of nano-flower MIL-125(Mo)-In2Se3 Z-scheme heterojunctions by one-step solvothermal method for removal of tetracycline from wastewater in the synergy of adsorption and photocatalysis way

This paper reports on a novel method to remove Hg0 in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO2 on mercury removal performance, while also enhancing Hg0 adsorption. Colloidal copper sulfides demonstrated the superior Hg0 adsorption rate of 306.9 μg·g−1·min−1 under 6% SO2 + 6% O2 atmosphere with a removal efficiency of 99.1%, and the highest-ever Hg0 adsorption capacity of 736.5 mg·g−1, which was 277% higher than all other reported metal sulfides. The Cu and S sites transformation results reveal that SO2 could transform the tri-coordinate S sites into S22− on copper sulfides surfaces, while O2 regenerated Cu2+ via the oxidation of Cu+. The S22− and Cu2+ sites enhanced Hg0 oxidation, and the Hg2+ could strongly bind with tri-coordinate S sites. This study provides an effective strategy to achieve large-capability adsorption of Hg0 from non-ferrous smelting flue gas.

show abstract

“…2− [33,34]. The specific conversion process of activity sites will be further studied in the following.…”

Section: Hg 0 Removal Performance Of C-cus Under So 2 and O 2 Atmosph...mentioning

confidence: 99%

Achieving Large-Capability Adsorption of Hg0 in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO2 Atmosphere

Xie

Chen

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…Despite the ternary composite exhibiting a high activity, the use of such complex ternary composites may not be appropriate due to the multi-stage and high production costs. Some more simple MOF-based Z-scheme heterojunctions containing metal oxides, 123,127,178 complex oxides (perovskites 124,[179][180][181] and spinel), 182 and chalcogenides 121,122,183 are not inferior in activity. As an example, tiny TiO 2 nanoparticle supported Au clusters were incorporated into NH 2 -UiO-66 to create the ASS Z-scheme photocatalyst for promoting the photocatalytic degradation of ethyl acetate in the gas phase.…”

Section: •−mentioning

confidence: 99%

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Belousov

Fukina

Koryagin

2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Heterogeneous photocatalysis has been considered one of the most attractive alternative routes to transforming naturally abundant, clean, and sustainable solar energy into chemical energy. Nowadays, the most popular heterogeneous photocatalyst, titanium dioxide, has already found applications for water splitting to produce hydrogen and oxygen, for the degradation of organic pollutants, for air purification, and for the creation of self‐cleaning coatings. However, TiO2 has a significant limitation: a large band gap (3.0–3.4 eV) that makes it impossible to use anything other than ultraviolet illumination to initiate photocatalytic processes. With a focus on efficient solar‐energy utilization, the development of new photocatalysts that are sensitive to visible light is an important direction in the theory and practice of heterogeneous photocatalysis. In this regard, the use of metal–organic frameworks (MOFs) is an attractive route; they have emerged as an interesting class of materials for applications in photoreactions due to their flexible tunability in composition, structure, and functional properties, along with their facilitated adsorption towards chemicals and their efficient light absorption. Moreover, they can be composed with other semiconductors to produce heterojunctions (e.g., type‐II, Z‐scheme, and S‐scheme), whose effectiveness in photogenerated charge separation has already been proven by many examples. The present critical review reports progress over the last 5 years in the preparation and activity of metal–organic framework‐based heterojunction photocatalysts for the degradation of organic pollutants. © 2022 Society of Chemical Industry (SCI).

show abstract

“…Solar energy is a sustainable source of energy − and can be converted into various forms such as electrical energy. − So far, numerous studies have been performed on the harvesting of photo energy by semiconductors for photocatalytic degradation of organic pollutants, hydrogen production, CO 2 reduction, and so on. − In particular, TiO 2 is a good semiconducting photocatalyst due to its chemical stability, low cost, and nontoxicity, and owing to the large bandgap, light absorption by TiO 2 is not efficient. In 2 Se 3 also has excellent optical, mechanical, and electrical properties in addition to environmental friendliness. − In 2 Se 3 has a smaller bandgap of 1.36–2.0 eV, and the d 10 electron configuration of In 3+ can serve as the main cation in photocatalysis. , However, poor photoreduction/photooxidation and rapid recombination of photogenerated carriers are drawbacks, and several methods have been proposed to improve the materials. − In particular, heterojunctions can effectively facilitate the separation and migration of photogenerated carriers during photocatalytic activity, which in turn increases the survival of photogenerated carriers.…”

Section: Introductionmentioning

confidence: 99%

Photo Energy-Enhanced Oxygen Reduction and Evolution Kinetics in Zn-Air Batteries

Feng

Zhang

Luo

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Harvesting solar energy directly to boost the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on an air cathode is a promising approach. Herein, we synthesize a step-scheme (S-scheme) titanium dioxide-indium selenide (TiO 2 -In 2 Se 3 ) heterojunction catalyst. The onset potential in ORR under light illumination reaches 1.28 V and the onset potential decreases to 0.48 V in OER. When an S-scheme TiO 2 -In 2 Se 3 heterojunction is exposed to light, photogenerated electrons at the conduction band (CB) of TiO 2 migrate to the valence band (VB) of In 2 Se 3 due to the built-in electric field. The photogenerated electrons with strong reduction capability on the CB of In 2 Se 3 and the holes with strong oxidation capability on the VB of TiO 2 boost the cathode reaction kinetics (ORR/OER). The excellent outcome reveals tremendous commercial potential of photo-enhanced Zn-air batteries.

show abstract

Construction of nano-flower MIL-125(Mo)-In2Se3 Z-scheme heterojunctions by one-step solvothermal method for removal of tetracycline from wastewater in the synergy of adsorption and photocatalysis way

Cited by 38 publications

References 51 publications

Achieving Large-Capability Adsorption of Hg0 in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO2 Atmosphere

Achieving Large-Capability Adsorption of Hg0 in Wet Scrubbing by Defect-Rich Colloidal Copper Sulfides under High-SO2 Atmosphere

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Photo Energy-Enhanced Oxygen Reduction and Evolution Kinetics in Zn-Air Batteries

Contact Info

Product

Resources

About