JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Li Li,Jiumao Cai,Yunhui Yan,Fengying Zhao,Jianguo Zhou
Novel flower-like direct Z-scheme WS 2 /Bi 2 O 2 CO 3 photocatalyst was fabricated via a one-pot hydrothermal method . The structure, morphology, together with the optical and photoelectrochemical properties of the photocatalysts were analyzed by various techniques. The flower-like WS 2 /Bi 2 O 2 CO 3 photocatalyst exhibited efficient removal of Lanasol Red 5B, with rate constants of 1.85 and 3.23 times higher than that of Bi 2 O 2 CO 3 under UV and simulated solar irradiation, respectively. Additionally, the flower-like WS 2 /Bi 2 O 2 CO 3 photocatalyst exhibited 95% ciprofloxacin removal efficiency within 90 min. The enhanced photocatalytic activity of optimal WS 2 /Bi 2 O 2 CO 3 could be attributed to the synergistic effect of the effective photoinduced charge carrier separation and transfer, the enhanced light harvesting ability and larger specific surface area. Furthermore, the active species trapping and ESR experiments indicated that hole (h + ), superoxide radical (•O 2 − ) and hydroxyl radical (•OH) were main reactive species in the photocatalytic process. The WS 2 /Bi 2 O 2 CO 3 heterojunction was speculated to follow a Z-scheme charge transfer mechanism. This facile method provides new possibilities for the fabrication of effective Bi 2 O 2 CO 3 -based photocatalysts for environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ChemPhotoChem
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2024
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IF 3
Shuwei Wei,Qiuhui Zhu,Haitao Ren,Ximing Li,Yue Xin,Hui Wang,Chuanyi Wang
Graphical The photocatalytic efficiency of the optimized Ni 2+ -Bi 2 O 2 CO 3 for ppb-level NO under visible light irradiation is 59.4 %, which is 2.8 times than that of its counterpart, Bi 2 O 2 CO 3 (21.2 %). Furthermore, the introduction of nickel ions improves the photocatalytic performance of Ni 2+ -Bi 2 O 2 CO 3 , which not only lowered the bandgap, but also reduced the recombination of photogenerated carriers by formation of the impurity level. Bi 2 O 2 CO 3 is a typical bismuth-based semiconductor photocatalyst that has attracted much attention because of layered structure and polarization characteristics. However, the wide bandgap of Bi 2 O 2 CO 3 limits its practical applications in photocatalysis. In this study, the nickel (II)-doped Bi 2 O 2 CO 3 (Ni 2+ -Bi 2 O 2 CO 3 ) with oxygen vacancies was prepared by adding a controllable amount of nickel ions. The photocatalytic efficiency of the optimized sample for ppb-grade NO under visible light irradiation is 59.4 %, which is 2.8 times than that of its counterpart, Bi 2 O 2 CO 3 (21.2 %). Based on experiments and characterizations, Introduction of nickel ions and oxygen vacancies improves the photocatalytic performance of Ni 2+ -Bi 2 O 2 CO 3 , which not only lowered the bandgap from 3.25 eV to 2.92 eV, but also reduced the recombination of photogenerated carriers by formation of the impurity level. Furthermore, the adsorption and photocatalytic conversion pathway of NO was explored by in situ DRIFTS, the principal byproducts of photocatalytic oxidation of NO are NO 3 − and NO 2 − . This work offers a new perspective to improve the photocatalytic activity by doping mothed for air purification.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Lu Zhang,Haotian Wang,Ju Peng,Qijie Yi,Dan Zhang,Li Lv,Jianhao Qiu,Wenxiang Tang
An effective and environmentally friendly way to treat wastewater powered by solar energy is to combine photocatalytic purification technology with in-situ H 2 O 2 generation. This work developed a type II CdS/Bi 2 O 2 CO 3 heterojunction photocatalyst through a MOF-based pyrolysis strategy, which was further applied for simultaneous photodegradation of tetracycline and photocatalytic production of H 2 O 2 . The heterojunction generated by decorating CdS nanoparticles on Bi 2 O 2 CO 3 surface is characterized by close contact which results in efficient charge separation. It has been discovered that the CdS/Bi 2 O 2 CO 3 heterojunction may photocatalytically produce H 2 O 2 by a two-step O 2 reduction reaction in ambient air and pure water when exposed to visible light, with a yield of 745.2 μmol⸱L −1 . In comparison to pure CdS, where the yield was only 95.7 μmol⸱L −1 , this is a substantial improvement, further demonstrating the great improvement of this unique heterojunction. Additionally, 98 % of the tetracycline could be degraded in 2 h, and the CdS/Bi 2 O 2 CO 3 heterojunction’s H 2 O 2 production in a tetracycline solution reached 1889.4 μmol⸱L −1 . This study shows how metal–organic framework-derived materials may be used for photocatalysis and offers information on how water purification technology can be combined with environmentally friendly H 2 O 2 production.
研究领域:
环境科学
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材料科学
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光化学
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2025
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IF 4.9
Zhang Qiuyun,He Maozhen,He Shijian,Lei Yanhui,Zou Huixin,Zhang Xiaojuan,Hu Yulin,Zhang Yutao
Photocatalytic organic pollutant degradation offers new perspectives for sustainable sunlight utilization and wastewater purification. In this study, the flower-like Bi 2 O 2 CO 3 (BOC) nanosheets were incorporated into zirconium-based MOFs (MOF-801) for the construction of BOC@MOF-801 heterojunction nanocomposites, through a simple one-pot hydrothermal route to remove persistent rhodamine B (RhB) dye efficiently. The as-synthesized photocatalysts were systematically characterized by XRD, FTIR, SEM, EDS, N 2 physisorption, TG, XPS, UV-Vis DRS, PL, transient photocurrent, and EIS techniques. The results of all characterization studies confirmed that the incorporation of BOC into MOF-801 improved the textural properties, visible light response-ability, and the formation of heterojunctions with better charge transport. All BOC@MOF-801 photocatalysts show high activity, with the BOC@MOF-801-0.2 nanocomposite reaching 98.8% RhB (50 mg/L) degradation after 120 min under visible radiation, superior to individual BOC and MOF-801. This improvement possibly due to the relatively high specific surface area (316.2 m 2 /g), suitable pore volume (0.17 cm 3 /g), mesoscale pore size (3.2 nm), narrowed band gap (3.22 eV), and higher photocurrent. Importantly, the free radical scavenging experiment exhibited that holes and · O 2 − radicals are the main species responsible during photodegradation. Moreover, a potential mechanism for the breakdown of RhB dye is also discussed. This research highlighted an efficient way to develop MOFs-based heterojunction hybrid materials for environmental remediation applications. Graphical Zirconium-based MOFs (MOF-801) supported Bi 2 O 2 CO 3 nanocomposites (BOC@MOF-801) were successfully synthesized via a simple one-pot hydrothermal route, which was subsequently applied to photocatalytic degradation of organic dye.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RSC Advances
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2023
·Vol. 13
·期 3
·1594-1605
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IF 3.9
Baikang Zhu,Qinbing Dong,Jianghua Huang,Debin Song,Lihui Chen,Qingguo Chen,Chunyang Zhai,Bohong Wang,Jiří Jaromír Klemeš,Hengcong Tao
To improve the efficiency of photocatalytic oxidative degradation of antibiotic pollutants, it is essential to develop an efficient and stable photocatalyst. In this study, a polymer-assisted facile synthesis strategy is proposed for the polymorph-controlled α-Bi2O3/Bi2O2CO3 heterojunction retained at elevated calcination temperatures. The p–n heterojunction can effectively separate and migrate electron–hole pairs, which improves visible-light-driven photocatalytic degradation from tetracycline (TC). The BO-400@PAN-140 photocatalyst achieves the highest pollutant removal efficiency of 98.21% for photocatalytic tetracycline degradation in 1 h (λ > 420 nm), and the degradation efficiency was maintained above 95% after 5 cycles. The morphology, crystal structure, and chemical state of the composites were analysed by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Ultraviolet-visible diffuse reflection, transient photocurrent response, and electrochemical impedance spectroscopy were adopted to identify the charge transfer and separation efficiency of photogenerated electron–hole pairs. The EPR results verified h+ and ˙OH radicals as the primary active species in the photocatalytic oxidation reactions. This observation was also consistent with the results of radical trapping experiments. In addition, the key intermediate products of the photocatalytic degradation of TC over BO-400@PAN-140 were identified via high-performance liquid chromatography-mass spectrometry, which is compatible with two possible photocatalytic reaction pathways. This work provides instructive guidelines for designing heterojunction photocatalysts via a polymer-assisted semiconductor crystallographic transition pathway for TC degradation into cleaner production.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Songtao Zhong,Hui Zhou,Ming Shen,Yufeng Yao,Qiang Gao
It is vital for environment purification to design and prepare an artificial photocatalyst that can effectively separate photogenerated carriers and maintain the redox ability of system. In this paper, a g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 photocatalyst was rationally designed and successfully prepared via two-step in-situ transforming process. The results of X-ray diffraction, Fourier transform infrared spectroscopy , X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, and transmission electron microscopy confirm the successful synthesis of ternary g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts. The photocatalytic activities of all catalysts were assessed by the degradation of Rhodamine B (RhB) under simulated sunlight illumination. The g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts showed much higher photocatalytic activities than single g-C 3 N 4 , or BiOI and dual g-C 3 N 4 /BiOI. The results of electron spin resonance and active species trapping experiments revealed that h + and • O 2 − were responsible for the photodegradation of RhB, and a possible photogenerated carrier transport mechanism was proposed.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Liping Man,Quanlong Xu,Wenhao Li,Wei Chen,Weiwei Zheng,De-Kun Ma
Oxygen vacancies (OVs) can adjust surface and electronic structures of materials and behave as active sites, extend spectral responsive range, and promote the transfer and separation of photogenerated carriers. Therefore surface properties and photocatalytic activities of materials can be enhanced via the incorporation of OVs . However, the influences of OV concentration inside a material on its adsorption ability for heavy metal ions associated with surface and photocatalytic activities under different atmospheres are still unexplored. In this work, in order to obtain highly efficient adsorbents and photocatalysts, rose-like Bi 2 O 2 CO 3 hierarchical microspheres with rich OVs (Bi 2 O 2 CO 3 -ROVs) and deficient OVs (Bi 2 O 2 CO 3 -DOVs) were synthesized through a facile hydrothermal route and H 2 O 2 oxidation treatment, respectively. Bi 2 O 2 CO 3 -ROVs hierarchical microspheres showed 2.4-times larger adsorption capacity than Bi 2 O 2 CO 3 -DOVs counterparts. The former also showed significantly enhanced photocatalytic activity for Rodamine B (RhB) degradation in aqueous solution under air, N 2 , and Ar atmospheres than the latter, especially under anaerobic conditions. Our work demonstrated that OV engineering could provide a new strategy for enhancing adsorption capability and photocatalytic activity under both aerobic and anaerobic conditions of materials.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF CATALYSIS
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2019
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IF 7.723
Peng Bai,Xinli Tong,Jun Wan,Yiqi Gao,Song Xue
The photocatalytic selective transformation of amines is a green and cost-effective technology to obtain value-added products in chemical industry. In this work, a series of bismuth-based photocatalysts including Bi 2 MoO 6 , Bi 2 WO 6 , Bi 5 O 7 Cl, Bi 5 O 7 Br, Bi 5 O 7 I, BiPO 4 , BiVO 4 , Bi 2 O 3 and various morphology Bi 2 O 2 CO 3 (flower-like, sponge-like, plate-like and spherical) were synthesized and employed in the aerobic oxidative coupling of benzylamine. It is found that flower-like Bi 2 O 2 CO 3 exhibited the highest photocatalytic activity, in which a 100% conversion of benzylamine with 99.0% selectivity of N -benzylidenebenzylamine was obtained at room temperature. Moreover, the photocatalytic oxidative coupling processes of various aromatic and aliphatic amines were further investigated, and excellent yields and selectivities of corresponding products are attained. Then, based on characterization results (XRD, SEM, BET and XPS, etc.) of catalyst, high photocatalytic activity of flower-like Bi 2 O 2 CO 3 is attributed to thin nanopetals, low band gap, the morphology and large specific surface area. Finally, a possible reaction mechanism is proposed for the photocatalytic oxidative coupling of benzyl amine.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Li Jia,Shi Quanquan,Ha Lin,Sun Yanxin,Shi Huiming
Rational development of innovative photocatalysts with efficient interfacial separation and stronger oxidation–reduction ability of photo-generated carrier is critical for environmental antibiotic purification. In this work, a novel dual Z-scheme heterojunction nanocomposites were fabricated based on the in-situ growth of CuBi 2 O 4 nanoparticles onto the surface of TiO 2 nanorods and Bi 2 O 2 CO 3 nanosheets via a facile one-step hydrothermal method. Ternary TiO 2 /CuBi 2 O 4 /Bi 2 O 2 CO 3 (TCB) composites showed enhanced photocatalytic removal of tetracycline (TC), which is greater than pure Bi 2 O 2 CO 3 , CuBi 2 O 4 , TiO 2 and binary composites. The TCB-20 composite exhibited the best photo-degradation efficiency of TC (82% at 60 min) and maintained a higher stability after four consecutive cycles. Additionally, a dual Z-scheme photocatalytic mechanism with highly efficient and fast electron transfer was proposed, which prominently improves the photocatalytic performance. This work reports an integrated structure of a dual Z-scheme heterojunction that plays an important role in the degradation of tetracycline. Graphical abstract
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Shuqi Gong,Rongyu Zhang,Chengji Sui,Yunlei Zhou,Zhengkun Yu,Li Ma,Huanshun Yin,Tianyi Sun,Junling Duan
Bi/Bi 2 O 2 CO 3 composite photocatalytic materials with oxygen vacancies were synthesized in one step by a hydrothermal method using bismuth nitrate pentahydrate as the bismuth source and N,N-dimethylformamide as the carbon source and reducing agent. The photocatalytic degradation performance of Bi/ Bi 2 O 2 CO 3 under simulated sunlight was investigated using the environmental hormone pollutant bisphenol A as the degradation target. The results show that the synergistic effect of Bi metal plasmon resonance effect (SPR) and oxygen vacancies promotes the effective separation of photogenerated electrons and holes, which greatly improves the photocatalytic ability. The degradation rate of Bi/Bi 2 O 2 CO 3 for bisphenol A (85.2 %) is 2.67 times higher than that of the single-component material Bi 2 O 2 CO 3 (31.9 %).The effect of external conditions (pH, anions, cations) on the photocatalytic performance was investigated. As well, ESR and active intermediate species capture experiments were performed on the composites, and it was deduced that h + , 1 O 2 , and ·O 2 - were the main reactive substances in this reaction system. And toxicity experiments were conducted on the degradation products, which proved that the toxicity of the degradation products was reduced.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Jie-hao Li,Jie Ren,Ying-juan Hao,Er-peng Zhou,Yue Wang,Xiao-jing Wang,Ran Su,Ying Liu,Xue-han Qi,Fa-tang Li
Constructing heterojunctions would result in the change of valence band position, which is an important factor determining the oxidative ability of photo-induced holes, has received scant attention. In this paper, β-Bi 2 O 3 /Bi 2 O 2 CO 3 composites with different ratios were obtained via ionic-liquid-assisted solvothermal and in-situ calcination processes. UV–vis DRS, Mott-Schottky test, and Kelvin probe measurement showed the change of band gaps of β-Bi 2 O 3 and Bi 2 O 2 CO 3 before and after heterojunction formation. SPV, ESR, photocurrent, and scavenger experiments identified the separation efficiency of photo-generated electrons and holes, as well as the active species generated in the photocatalytic process. The photocatalytic mechanism was investigated by the degradation of Rhodamine B (RhB) upon visible-light and simulated sunlight, respectively. The results demonstrated that β-Bi 2 O 3 /Bi 2 O 2 CO 3 heterojunctions possessed enhanced separation efficiency and higher degradation ability than the individuals under visible-light irradiation due to effective electron transfer. However, lower performance under simulated sunlight was observed, although their separation efficiency remained high. The decisive reason for this was that the up-shift of valence band of Bi 2 O 2 CO 3 induced by hybridization and the transition of holes from VB of Bi 2 O 2 CO 3 to that of β-Bi 2 O 3 with more negative potential decreased the oxidative ability of holes, which surpassed the positive influence of enhanced separation efficiency.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Huiping Zhao,Guangfang Li,Fan Tian,Qintao Jia,Yunling Liu,Rong Chen
To overcome the issue of UV-light response character of Bi 2 O 2 CO 3 due to its wide band gap, we primarily attempted to understand the possibility of improving the photocatalytic activity of Bi 2 O 2 CO 3 via g-C 3 N 4 surface-decoration by the theoretical calculation. Subsequently, g-C 3 N 4 surface-decorated Bi 2 O 2 CO 3 was successfully prepared via a facile hydrothermal method. It was found that the g-C 3 N 4 surface-decorated Bi 2 O 2 CO 3 samples exhibited enhanced activities for the photodegradation of tetracycline compared with pure Bi 2 O 2 CO 3 upon simulated solar light irradiation. Among them, the 10 wt% g-C 3 N 4 surface-decorated Bi 2 O 2 CO 3 sample showed the highest photocatalytic efficiency. First principle calculation and experimental data confirmed that the charge transfer at the interface between g-C 3 N 4 and Bi 2 O 2 CO 3 could significantly suppress the recombination of photo-generated electron-holes pairs, thus improving the photocatalytic performance. The proposed mechanism for the enhanced photocatalytic activity was also discussed. Moreover, the photodegradation of antibiotics over g-C 3 N 4 surface-decorated Bi 2 O 2 CO 3 was also performed in actual water matrix.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）