ZnO/biochar nanocomposites via solvent free ball milling for enhanced adsorption and photocatalytic degradation of methylene blue

Fang, Yu; Tian, Fengyu; Zou, Haowen; Ye, Zihan; Peng, Chuang; Huang, Jinhua; Zheng, Yun; Zhang, Yue; Yang, Yudan; Wei, Xiaoqian; Gao, Bin

doi:10.1016/j.jhazmat.2021.125511

Cited by 209 publications

(44 citation statements)

References 38 publications

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“…For coordinating the contradiction between energy and environment, exploring a renewable clean energy has become the top priority. , Hydrogen energy stands out because it is pollution-free, transportable, and easy to store. Hydrogen energy, which is a kind of secondary energy, has become the direction of people’s efforts to extract it from water by using solar energy. , In recent decades, a large number of semiconductor materials have been explored as typical photocatalysts, such as TiO 2 , ZnO, , and g-C 3 N 4 . , For the semiconductor photocatalytic water splitting hydrogen production system, the electrons migrate to the surface of the catalyst in order to reduce H + and release H 2 . At the same time, an outstanding photocatalyst needs to match the band edge position of semiconductor with the redox potential of water, have excellent adsorption to H + , and easily desorb the generated H 2 from the catalyst surface. − Therefore, the selection of efficient semiconductor catalysts is the key factor to improve the catalytic efficiency.…”

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confidence: 99%

“…Hydrogen energy, which is a kind of secondary energy, has become the direction of people's efforts to extract it from water by using solar energy. 3,4 In recent decades, a large number of semiconductor materials have been explored as typical photocatalysts, such as TiO 2 , 5 ZnO, 6,7 and g-C 3 N 4 . 8,9 For the semiconductor photocatalytic water splitting hydrogen production system, the electrons migrate to the surface of the catalyst in order to reduce H + and release H 2 .…”

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confidence: 99%

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P Doping Promotes the Spontaneous Visible-Light-Driven Photocatalytic Water Splitting in Isomorphic Type II GaSe/InS Heterostructure

Zhang

Yin

2021

J. Phys. Chem. Lett.

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The development and design of clean and efficient water splitting photocatalysts is important for the current situation of energy shortage and environmental pollution. A new type of isomorphic GaSe/InS heterostructure is constructed, and the optoelectronic properties were studied through first-principles calculations. The results show that GaSe/InS vdW heterostructure is a type II semiconductor with a band gap of 2.09 eV. However, through the analysis of the energy band edge position and Gibbs free energy change of water splitting, it is found that the GaSe/InS heterostructure is difficult to undergo overall water splitting. Therefore, nonmetallic element P doping is considered, the established P-doped GaSe/InS (P-GaSe/InS) heterostructure could maintain the type II band arrangement, and under acidic conditions, P-GaSe/InS heterostructure could spontaneously undergo overall water splitting thermodynamically. Furthermore, the low exciton binding energy of P-GaSe/InS heterostructure highlights better light absorption performance. Therefore, these findings indicate that P-GaSe/InS heterostructure is a promising photocatalyst in overall water splitting.

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confidence: 99%

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confidence: 99%

P Doping Promotes the Spontaneous Visible-Light-Driven Photocatalytic Water Splitting in Isomorphic Type II GaSe/InS Heterostructure

Zhang

Yin

2021

J. Phys. Chem. Lett.

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“…The results showed that the photocatalytic activity is dependent on the pyrolysis temperature, which affected the band gap energy and visible light absorption efficiency. Yu et al (2021b) synthesized ZnO/biochar by ball milling method. The biochar was broken in ball milling process, and the meso-and macropores of the composites were increased, which enhanced the adsorption of MB on the composites.…”

Section: Ti-based Biocharmentioning

confidence: 99%

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Cai

Zhang

et al. 2022

Biochar

158

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The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e−-h+ pairs, to produce more superoxide radicals (·O2−) and hydroxyl radicals (·OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Graphical Abstract

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“…Additionally, the electrons generated after the excitation of the BC could transfer to the conduction band of the catalyst, which might increase the number of reactive species. 56 Moreover, the pollutant molecules could be adsorbed on the BC's surface, which participated in the increase of the overall efficiency.…”

Section: Mechanism Of Pesticides Removal and Generated Intermediatesmentioning

confidence: 99%

Solar‐light‐driven ZnO/biochar treatment of pesticides contaminated wastewater: A practical and computational study

Samy

Alalm

Ezeldean

et al. 2022

Energy Science & Engineering

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ZnO/biochar nanocomposites via solvent free ball milling for enhanced adsorption and photocatalytic degradation of methylene blue

Cited by 209 publications

References 38 publications

P Doping Promotes the Spontaneous Visible-Light-Driven Photocatalytic Water Splitting in Isomorphic Type II GaSe/InS Heterostructure

P Doping Promotes the Spontaneous Visible-Light-Driven Photocatalytic Water Splitting in Isomorphic Type II GaSe/InS Heterostructure

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Solar‐light‐driven ZnO/biochar treatment of pesticides contaminated wastewater: A practical and computational study

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