COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Amin Jv,Yufei Zhang,Tianyi Yang,Bo Feng,Tao Sun,Xingjing Zhang,Lijing Wang,Renquan Guan,Chunbo Liu
Antibiotic pollution has been shown to cause water and soil contamination, leading to the development of multi-drug-resistant bacteria, which in turn affects human health. Photocatalytic degradation of antibiotics is a well-established green technology. In this paper, an oxygen-deficient BiOCl/Bi 2 O 2 CO 3 heterojunction photocatalyst was designed, synthesised and characterised. The experimental results showed that the BiOCl/Bi 2 O 2 CO 3 composite catalyst synergized with PMS for the degradation of tetracycline at high concentration (40 mg·L -1 ) eliminated 80% of the antibiotic in only 60 min, and its main active radicals were ·OH and ·O 2 - . The intermediates of tetracycline degradation were detected by LC-MS and their toxicity was evaluated based on quantitative structure-effect relationship (QSAR). It was found that the TC toxicity was significantly reduced. In addition, BiOCl/Bi 2 O 2 CO 3 exhibited good stability in the cyclic operation of photocatalytic degradation of TC, showing its potential as an efficient photocatalyst. The in-situ construction of BiOCl/Bi 2 O 2 CO 3 heterojunctions as well as the formation of oxygen defects facilitated the effective separation of photogenerated carriers, which led to the improvement of photocatalytic performance. The catalytic degradation mechanism of TC was also explored. This study provides an idea for the construction of stable and efficient Bi-based heterojunction photocatalysts with oxygen defects.
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高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Weidong Hou,Haiming Xu,Yujie Cai,Zhongwei Zou,Dongya Li,Dongsheng Xia
Enhancing the separation and migration efficiency of the photo-induced carriers is an appealing strategy to augment the photocatalytic performance. Herein, 0D/2D Bi 2 O 2 CO 3 /BiOCl heterojunction with rich interface oxygen vacancy (OVs) was successfully fabricated by in-situ ion exchange avenue using sodium citrate as CO 3 2− source. Multiple characterizations reveal that BOBl can degrade 84% tetracycline hydrochloride (TC) in 60 min, which is 6.4 and 6.0 fold higher than that of BiOCl and Bi 2 O 2 CO 3 , respectively. Moreover, further research found that the impressive activity of 0D/2D Bi 2 O 2 CO 3 /BiOCl emanates from the large surface area and the polishing separation and migration efficiency of the photo-generated carriers induced by the reasonable interface OVs concentration. Additionally, the OVs concentration of Bi 2 O 2 CO 3 , BiOCl and interface in 0D/2D Bi 2 O 2 CO 3 /BiOCl composites were estimated based on Raman and ESR techniques. This work not only provides a novel avenue to identify the components OVs concentration in heterostructure, but also offers a new ideal to ameliorate photocatalytic performance through interfacial defect engineering.
研究领域:
材料科学
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环境科学
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Pinliang Lai,Jiasheng Li,Zhaojun Xu,Bing Wang,Guomin Li
With the increasing demand for preservatives in industries such as food, cosmetics, and pharmaceuticals, the environmental pollution associated with these compounds has attracted growing concern. Although preservatives are widely applied across diverse sectors, their environmental persistence and degradation behavior remain underexplored. In this study, a novel Z -scheme g-C 3 N 4 /Bi 2 O 2 CO 3 photocatalyst was synthesized, and two commonly used preservatives—potassium sorbate (PS) and methyl para-hydroxybenzoate (MPB)—were selected as model pollutants to systematically investigate the photocatalytic performance of the prepared composite. The results demonstrated that the g-C 3 N 4 /Bi 2 O 2 CO 3 heterostructure exhibited remarkable photocatalytic activity under UV light irradiation, achieving degradation efficiencies exceeding 98 % within 40 min. Furthermore, characterization tests and density functional theoretical (DFT) calculations jointly confirmed that the g-C 3 N 4 /Bi 2 O 2 CO 3 heterojunction follows a typical Z -scheme charge transfer mechanism. This Z-scheme configuration allows the photocatalyst to retain strong redox potentials, thereby improving its overall redox capability and photocatalytic efficiency. Meanwhile, Liquid Chromatograph Mass Spectrometer (LC-MS) analysis combined with toxicity assessment experiments proved the effectiveness and safety of g-C 3 N 4 /Bi 2 O 2 CO 3 in degrading preservatives. These findings offer a promising strategy for the design of high-performance Z -scheme heterojunction photocatalysts for the efficient degradation of environmental contaminants such as preservatives.
研究领域:
环境科学
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材料化学
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光催化
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污染物降解
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可持续化学
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高影响因子
Catalysts
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2026
·Vol. 16
·期 8
·725
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IF 4.5
Hongtao Xie,Limi Yan,Shijian Lu,Pengcheng Xiang,Dongliang Liu,Lili Wang
The electrocatalytic reduction of CO2into value-added chemicals offers a promising route to mitigate greenhouse gas emissions, yet the uncontrollable structural reconstruction and surface rearrangement of electrocatalysts during operation often lead to severe activity degradation. Herein, we reveal that Bi2O2SO4(BSO) undergoes an irreversible phase transformation into Bi2O2CO3(BCO) nanosheets accompanied by the partial reduction of Bi3+to metallic Bi0under cathodic potentials. A series of BCO/BSO heterojunction catalysts with tunable compositions are synthesized via a mild in situ ion-exchange method. To circumvent the detrimental effects of this dynamic reconstruction, we devise a pre-activation strategy that deliberately completes the structural evolution prior to electrocatalysis. The optimized 20%-BCO/BSO heterojunction achieves a remarkable Faradaic efficiency of 98.4% for formate production in a flow cell at elevated potentials, with >95% FE(HCOOH)over a wide potential window (−0.8 to −1.7 V vs. RHE). In situ infrared spectroscopy elucidates that the reconstructed interface can promote CO2adsorption, stabilize the *OCHO intermediate, and facilitate HCOOH desorption. This work provides experimental evidence of the reconstruction behaviour of bismuth-based catalysts and offers a rational design method for constructing structurally stable heterojunction electrocatalysts.
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ENVIRONMENTAL RESEARCH
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2025
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IF 7.7
Yu Zhang,Yangang Sun,Luyao Pan,Zhaoxia Wen,Min Shi,Hao Li
Aiming at the bottleneck problems of limited visible light response range and high carrier recombination rate of Bi 2 O 2 CO 3 (BOC) photocatalyst, Ca 2+ /Ce 3+ co-doped Bi 2 O 2 CO 3 composite photocatalyst was constructed by hydrothermal method. The analysis of different characterization techniques shows that double doping can lead to lattice distortion and induce oxygen defects. Under visible light irradiation, the degradation efficiency of ciprofloxacin (CIP) and levofloxacin (LVX) by BOC-Ca-Ce4 reached 92.56 % and 90.39 %, respectively, and maintained a certain degradation efficiency in complex water bodies such as tap water and lake water. ESR and capture experiments confirmed that •O 2 − and h + were the dominant active species. Mechanism analysis showed that the valence cycle of Ce 3+ /Ce 4+ and the local electric field of Ca 2+ synergistically promoted the spatial separation of carriers. Through intermediate product analysis, CIP was finally mineralized to CO 2 /H 2 O, and the ECOSAR toxicity assessment showed that the ecological toxicity was reduced. This study provides a new design strategy for energy band engineering of two-component doped photocatalysts.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jian Wang,Xinfei Ge,Hongwei Liu,Chiheng Chu,Baoliang Chen
A pulsed-potential strategy enables in-situ construction of a reactive carbonate layer on Bi 2 O 2 CO 3 . • In situ Raman reveals higher surface carbonate concentration on Bi 2 O 2 CO 3 than on metallic Bi. • An adsorption–reduction–replenishment cycle is sustained by reversible phase transformation between Bi 2 O 2 CO 3 and Bi. • Direct carbonate-to-formate conversion achieves 24.3% faradaic efficiency and stable operation over 150 h. • DFT calculations show Bi 2 O 2 CO 3 favors carbonate adsorption while adjacent Bi sites promote formate desorption. Direct electroreduction of carbonate (CO 3 2− ) to value-added chemicals presents a promising yet underexplored pathway toward closed carbon cycles, primarily due to the intrinsic stability of carbonate and its weak affinity for conventional electrode surfaces. Here, we overcome these barriers through a pulsed-potential strategy that enables the in-situ construction and dynamic preservation of a reactive carbonate layer on a bismuth oxycarbonate (Bi 2 O 2 CO 3 ) cathode. In situ Raman spectroscopy reveals a significantly enhanced surface carbonate concentration on Bi 2 O 2 CO 3 compared to metallic Bi under cathodic polarization. A synergistic adsorption-reduction-replenishment cycle is sustained under pulsed potentials (0 V RHE for adsorption and −0.5 V RHE for reduction), driven by the dynamic interconversion between reactive adsorbed carbonate and stabilizing structural carbonate within the lattice, coupled with the reversible phase transformation between Bi 2 O 2 CO 3 and Bi. This approach enables direct carbonate-to-formate conversion with a Faradaic efficiency of 24.1% (a 40-fold advance over the state-of-the-art FE of ∼0.6%) and long-time operation exceeding 150 h. First-principles calculations reveal the molecular origin of this synergy: the Bi 2 O 2 CO 3 surface thermodynamically favors carbonate adsorption (ΔG ads = −2.14 eV), while adjacent metallic Bi sites facilitate formate desorption (ΔG des = 0.82 eV). This work establishes a direct carbonate electroreduction route and presents a general paradigm for managing anionic reactants through dynamic interfacial engineering. Download: Download high-res image (221KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zhiang Hou,Jinzhu Yue,Hao Chen,Jinnan Wang,Aimin Li,Philippe François-Xavier Corvini
Endocrine disrupting chemicals (EDCs) interfere with the normal secretion, transport and metabolism of human hormones, thus affecting neurological, reproductive and immune functions. Photocatalysis is regarded as a facile organic degradation technique. The construction of heterojunctions can modulate the reactive oxygen species and enhance the photocatalytic performance of semiconductors. However, poor contact interfaces still severely limit carrier separation and transfer. Herein, we have doped Co to modulate the band structure of Bi 2 O 2 CO 3 while facilitating the in situ growth of BiOI on its surface via shared Bi atoms. This approach led to the development of a 2D/2D Co-Bi 2 O 2 CO 3 /BiOI (Co-BOC/BiOI) S-scheme heterojunction characterized by atomically close contact interfaces. Furthermore, the photo-electrochemical characterization results indicate that the light adsorption capacity, carrier separation and transport efficiency of the optimized Co-BOC/BiOI-3 are greatly improved. This system demonstrates almost 100% removal rate for three typical EDCs within 60 min. The degradation kinetic constants show an improvement by an order of magnitude compared to single BiOI and Bi 2 O 2 CO 3 . More importantly, O 2 •﹣ , which is produced from O 2 reduction on high negative conduction band, can be subsequently oxidized into 1 O 2 by photogenerated hole. Electron paramagnetic resonance and quenching experiments indicate that the organics degradation process is dominated by 1 O 2 . This work offers new insights into the construction of high-quality S-scheme heterojunction interfaces for modulation of reactive oxygen species.
研究领域:
环境科学
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材料科学
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生物学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Hui Zhou,Songtao Zhong,Ming Shen,Jianhua Hou,Wuxia Chen
Herein, we fabricate a Bi/Bi 2 O 2 CO 3 heterojunction via one-pot in situ deposition of Bi nanoparticles on Bi 2 O 2 CO 3 nanosheets , using formamide both as a carbon/alkali source and a reductant and demonstrate that the content of Bi in Bi/Bi 2 O 2 CO 3 composites can be tuned by adjusting the hydrothermal reaction time. Systematic characterization and analysis of as-prepared composites revealed that the initial in situ growth of Bi nanoparticles on BiOCOOH (an intermediate formed during the decomposition of formamide) was followed by the reaction of BiOCOOH with CO 3 2− to afford Bi 2 O 2 CO 3 nanosheets. The photocatalytic activity (PCA) of Bi/Bi 2 O 2 CO 3 was evaluated by degradation of rhodamine B (RhB) under simulated solar light irradiation, and the best result (99.61% degradation efficiency after 50-min irradiation) was observed for the photocatalyst obtained after 12-h hydrothermal treatment. The enhanced photocatalytic performance was ascribed to visible-light harvesting and electron-hole separation efficiency improvements caused by the surface plasmon resonance of Bi nanoparticles. Moreover, the developed photocatalyst displayed high photochemical stability and reusability during ten photocatalytic cycling runs and was therefore concluded to be well suited for practical wastewater purification applications. Thus, this work provides a new and facile method of utilizing non-noble Bi nanoparticles to optimize the PCA of semiconductor materials.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xinru Chen,Weijian Liu,Junxin Yan,Bochong Wang,Anmin Nie,Jianyong Xiang,Kun Zhai,Tianyu Xue,Fusheng Wen,Congpu Mu
Morphology and composition designs are recognized as effective strategies for realizing efficient microwave absorption performance through a synergistic coupling mechanism that involves microwave loss capability, impedance matching, multiple reflection and scattering. Constructing heterointerfaces can effectively improve the polarization loss, thereby enhancing the microwave absorption of dielectric materials. In this work, a peony flower-like Bi 2 O 2 CO 3 (BOC) is synthesized from Bi 2 O 3 precursor, and its morphology is manipulated by controlling the crystal structure of Bi 2 O 3 . Subsequently, the peony flower-like BOC is coated by polyaniline (PANI) via an in-situ polymerization to form peony flower-like BOC@PANI composites. Electromagnetic parameters of these composites can be effectively regulated by changing the mass ratio of BOC and PANI, resulting in tunable impedance and tunable polarization/conductive loss capacities. Furthermore, the peony flower‑like structure and the heterogeneous interface between BOC and PANI promote multiple reflection and scattering of microwave, thereby prolonging their transmission path, while also enhancing interface polarization, which contributes to improved polarization loss. Accordingly, peony flower-like BOC@PANI-2 composite exhibits a minimum reflection loss of −57.11 dB at 1.82 mm and an effective absorption bandwidth of 5.74 GHz at 1.89 mm. Radar cross-section simulation demonstrates that BOC@PANI-2 has the weakest radar scattering signals, indicating a significantly improved stealth effect.
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高影响因子
Small
·
2024
·Vol. 20
·期 35
·2401559
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IF 13
Bixia Yang,Weilong Dong,Chongbing Zhu,Xinlian Huang,Yunhui Han,Yanting Zheng,Jiawei Yan,Zanyong Zhuang,Yan Yu
A facile gaseous CO 2 mediated solid-to-solid transformation principle is adopted to insert additional CO 3 2− anions into the thin single-crystal nanosheets of Bi 2 O 2 CO 3 , which is built of periodic arrays of intrinsic CO 3 2− anions and (Bi 2 O 2 ) 2+ layers. The additional CO 3 2− anions create abundant defects. The Bi 2 O 2 CO 3 nanosheets with rich interlayer CO 3 2− exhibit superior electronic properties and charge transfer kinetics than the pristine single-crystal 2D Bi 2 O 2 CO 3 and display enhanced catalytic activity in photocatalytic CO 2 reduction reaction and the photocatalytic oxidative degradation of organic pollutants. This work thus illustrates interlayer engineering as a flexible means to build layered 2D materials with excellent properties.
研究领域:
材料科学
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环境科学
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PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 20
·4705
·
IF 3.2
Weijie Hua,Huixin Yuan,Songhua Huang
This research successfully synthesized a novel n-n heterojunction Bi2O2CO3/AgVO3nanocomposite photocatalyst via the in situ chemical deposition process. Characterization results strongly confirmed the formation of a tight heterojunction at the Bi2O2CO3/AgVO3interface. The nanocomposite exhibited characteristic XRD peaks and FT-IR vibrational modes of both Bi2O2CO3and AgVO3simultaneously. Electron microscopy images revealed AgVO3nanorods tightly and uniformly loaded onto the surface of Bi2O2CO3nanosheets. Compared to the single-component Bi2O2CO3, the composite photocatalyst exhibited a red shift in its optical absorption edge to the visible region (515 nm) and a decrease in bandgap energy to 2.382 eV. Photoluminescence (PL) spectra demonstrated the lowest fluorescence intensity for the nanocomposite, indicating that the recombination of photogenerated electron–hole pairs was suppressed. After 90 min of visible-light irradiation, the degradation efficiency of Bi2O2CO3/AgVO3toward methylene blue (MB) reached up to 99.55%, with photodegradation rates 2.51 and 2.79 times higher than those of Bi2O2CO3and AgVO3, respectively. Furthermore, the nanocomposite exhibited excellent cycling stability and reusability. MB degradation was gradually enhanced with increasing the photocatalyst dosage and decreasing initial MB concentration. Radical trapping experiments and absorption spectroscopy of the MB solution revealed that reactive species h+and ·O2−could destroy and decompose the chromophore groups of MB molecules effectively. The possible mechanism for enhancing photocatalytic performance was suggested, elucidating the crucial roles of charge carrier transfer and active species generation.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuerui Ma,Peng Chen,Jiazhen Liao,Xing’an Dong,Wenjie He,Wendong Zhang
Selective photocatalytic oxidation of NO to nitrate (NO 3 – ) over toxic NO 2 remains challenging due to low selectivity and inefficient charge migration in existing systems. This study introduces Fe 3+ as an electron acceptor beneath a Bi 4 TaO 8 Cl/Bi 2 O 2 CO 3 heterojunction to precisely regulate electron pathways and promote targeted hydroxyl radical ( • OH) generation. Combined experimental and DFT analyses reveal Fe 3+ ’s dual role: enhancing interfacial electron transfer and activating H 2 O at surface sites to form • OH. The optimized heterojunction achieves 68.19 % NO conversion with minimal NO 2 selectivity (10.98 %). ESR and ROS quenching confirm Fe 3+ -driven electron migration enriches surface holes, boosting H 2 O adsorption and • OH production (2.76-fold increase). The strong oxidation capacity of • OH suppresses NO 2 formation, favoring complete NO oxidation to NO 3 – . This work provides a strategic approach for selective NO removal by electron-pathway engineering, advancing the design of eco-friendly photocatalysts for air pollution control.
研究领域:
环境化学
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光催化
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材料科学
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化学工程
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大气污染控制
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高影响因子
危险品化学品经营许可证（带存储）