One-pot preparation of layered double oxides-engineered biochar for the sustained removal of tetracycline in water

Tang, Jiayi; Ma, Yongfei; Deng, Zhikang; Li, Ping; Qi, Xuebin; Zhang, Zulin

doi:10.1016/j.biortech.2023.129119

Cited by 33 publications

(5 citation statements)

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“…42-1467) at 31.3, 36.9, and 44.8°, respectively. The lack of aluminum oxide reflections indicates that CoAl-LDH-600 is an amorphous aluminum oxide-supported Co 3 O 4 nanosheet, and the amorphous aluminum oxide is crucial to maintaining the stability of calcined LDHs. – In addition to the typical planes of Co 3 O 4 , the (101) and (200) planes of anatase TiO 2 at 25.3 and 48.0° can be observed in TiO 2 /Co 3 O 4 (JCPDS no. 21-1272), indicating the effective combination of Co 3 O 4 and anatase TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Hao,

Tian,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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TiO 2 -based two-dimensional nanosheet composite materials are promising photocatalysts for water splitting. The mesoporous structure possesses a high surface-to-volume ratio with more active sites. It is fantastic for photocatalysts to integrate the advantages of a porous structure into two-dimensional materials. The calcined ultrathin layered double hydroxides (LDHs) are porous metal oxide nanosheets, which are considered ideal templates to construct photocatalysts. In this work, we report the design and fabrication of amorphous aluminum oxide-supported anatase TiO 2 /spinel Co 3 O 4 (TiO 2 /Co 3 O 4 ) mesoporous nanosheets by calcinating ultrathin TiO 2 /CoAl-LDH precursors. The built-in electric field in the TiO 2 /Co 3 O 4 interface facilitates the charge transfer, and Co 3 O 4 acts as a cocatalyst to further enhance the oxygen evolution reaction activity. Consequently, the TiO 2 /Co 3 O 4 photocatalyst exhibits excellent photocatalytic performances for the evolution of O 2 and H 2 . This strategy for preparing mesoporous nanosheet photocatalysts is expected to extend to the other metal oxide semiconductor systems.

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Section: Resultsmentioning

confidence: 99%

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Hao,

Tian,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Section: Resultsmentioning

confidence: 99%

“…TC is an intricate amphoteric organic molecule that may take one of four distinct forms depending on the pH values: positively charged H 4 TC + (pH < 3.3), zwitterionic H 3 TC (3.4 < pH < 7.6), negatively charged H 2 TC − (7.6 < pH < 9.7), and HTC 2− (pH > 9.7). 47 On the other hand, MB molecules in solution had a rather stable structure. The proton-binding sites (−OH and −COOH) on the surface of ALNC were positively charged under acidic conditions, while the interaction between the positively charged ALNC and the negatively charged MB + was constrained by competing adsorption and electrostatic repulsion.…”

Section: Adsorption Performance Of Lignin-derived Adsorbentsmentioning

confidence: 99%

Bi-Activation Engineering of Lignin-Derived Porous Carbon Adsorbent for Highly Efficient Water Purification

Bai,

Wei,

Qiu

et al. 2023

Ind. Eng. Chem. Res.

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Organic contaminants have become a major concern in current environmental policies. Biochar is often used to absorb pollutants due to its large surface area, wide availability, and cost-effectiveness. Lignin, a byproduct of the pulp and paper industry, is an ideal precursor for biochar due to its abundance, sustainability, and high carbon content. Bi-activation engineering of alkali lignin during the carbonized process by combining potassium carbonate and melamine to produce porous carbon with more micro–mesoporous structure was proposed. Melamine reacts with the carbon matrix during the activation process, creating new alkaline compounds and releasing more gas, resulting in the formation of more micropores and mesopores. Adjusting the ratio of potassium carbonate to melamine can optimize the micro–mesoporous structure of porous carbon materials. In this regard, a nitrogen-doped three-dimensional porous carbon (ALNC-2-1) with a specific surface area of up to 3522 m2 g–1 was synthesized for the adsorption of methylene blue and tetracycline hydrochloride in wastewater; the largest adsorption capacities were 1364 and 1682 mg g–1, respectively. The adsorption process was found to follow the pseudo-second-order kinetic model and was attributed to electrostatic interaction, pore filling, hydrogen bonding, and π–π interaction. Moreover, ALNC demonstrated high removal rates for organic pollutants and excellent regeneration performance, thus making it a promising material for practical wastewater treatment.

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“…This is coincident with the finding by the FTIR analysis of the biochar structure. To further explore the mechanism of NOR adsorption on biochar, the adsorbed ABLB4 samples were analyzed, as shown in Figure 4d,e; the change in the C 1s peak of the ABLB4 sample after NOR adsorption indicates that the benzene ring structure and C=O bond as an electron donor group participate in the adsorption process, which provides a way to explore the specific mechanism of NOR adsorption [57]. As discussed above, Figure 5 summarizes the NOR adsorption mechanisms of ABLB4.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

Li,

Zhao,

Zhang

et al. 2024

Molecules

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One-step carbonization was explored to prepare biochar using the residue of a traditional Chinese herbal medicine, Atropa belladonna L. (ABL), as the raw material. The resulting biochar, known as ABLB4, was evaluated for its potential as a sustainable material for norfloxacin (NOR) adsorption in water. Subsequently, a comprehensive analysis of adsorption isotherms, kinetics, and thermodynamics was conducted through batch adsorption experiments. The maximum calculated NOR adsorption capacity was 252.0 mg/g at 298 K, and the spontaneous and exothermic adsorption of NOR on ABLB4 could be better suited to a pseudo-first-order kinetic model and Langmuir model. The adsorption process observed is influenced by pore diffusion, π–π interaction, electrostatic interaction, and hydrogen bonding between ABLB4 and NOR molecules. Moreover, the utilization of response surface modeling (RSM) facilitated the optimization of the removal efficiency of NOR, yielding a maximum removal rate of 97.4% at a temperature of 304.8 K, an initial concentration of 67.1 mg/L, and a pH of 7.4. Furthermore, the biochar demonstrated favorable economic advantages, with a payback of 852.5 USD/t. More importantly, even after undergoing five cycles, ABLB4 exhibited a consistently high NOR removal rate, indicating its significant potential for application in NOR adsorption.

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One-pot preparation of layered double oxides-engineered biochar for the sustained removal of tetracycline in water

Cited by 33 publications

References 43 publications

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Bi-Activation Engineering of Lignin-Derived Porous Carbon Adsorbent for Highly Efficient Water Purification

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

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One-pot preparation of layered double oxides-engineered biochar for the sustained removal of tetracycline in water

Cited by 33 publications

References 43 publications

Preparation of Mesoporous TiO2/Co3O4 Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO2/Co3O4 Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Bi-Activation Engineering of Lignin-Derived Porous Carbon Adsorbent for Highly Efficient Water Purification

Exploring the Potential of Biochar Derived from Chinese Herbal Medicine Residue for Efficient Removal of Norfloxacin

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Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution

Preparation of Mesoporous TiO₂/Co₃O₄ Nanosheets for Efficient Photocatalytic Oxygen and Hydrogen Evolution