JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Qingyun He,Shanxi Gong,Qinghua Liang,Zhifeng Liu,Binbin Shao,Ting Wu,Yuan Pan,Xiansheng Zhang,Miao He,Lin Ge,Jingwen Sun
A novel Schottky heterojunction was obtained by co-calcining fish-scale tubular carbon nitride (FTCN), V-BiOIO 3 and Tungsten carbide (WC) for photocatalytic degradation of tetracycline hydrochloride (TCH). The novel Schottky heterojunction has been analyzed by several characterizations and experiments. The case of photocatalytic degradation was studied for different initial concentrations, electrolyte and pH, respectively. The experiments have indicated that the V-BiOIO 3 /g-C 3 N 4 /WC performed an excellent activity of photocatalytic for TCH degradation (89.0%). In the mechanism analysis, we first deduce that the V-BiO3/FTCN compound belongs to the S-scheme heterojunction photocatalysts based on the properties of the band gap structure, which can effectively suppress recombination of joint carriers. Secondly, the introduction of the cocatalyst WC formed Schottky junction, which could play a role as an electronic library to trap e − and promote the separation of photo-induced carrier and thus maximize the strong oxidation ability of h + . In addition, the introduction of WC could also significantly enhance the optical absorption properties of the composites. This research could provide a new idea for the construction of novel and efficient carbon nitride-based photocatalysts under VSL (visible light), and promote its practical application in 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
Journal of the Taiwan Institute of Chemical Engineers
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2018
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IF 3.849
Jingru Guan,Jinze Li,Zhefei Ye,Dongyao Wu,Chongyang Liu,Huiqin Wang,Changchang Ma,Pengwei Huo,Yongsheng Yan
A series of La 2 O 3 /CeVO 4 @halloysite nanotubes composites were successfully fabricated by the hydrothermal method. The La 2 O 3 /CeVO 4 @halloysite nanotubes composites display outstanding photocatalytic activity for removing tetracycline (TC) solution under visible light irradiation (λ ≥ 420 nm). After irradiation 60 min, an optimized La 2 O 3 /CeVO 4 @halloysite nanotube composite exhibited a high photocatalytic activity (87.1%), which is 3.89 times higher than that of raw CeVO 4 (22.4%). The improvement of ternary composites performance is attributed to the Ce 3+ and Ce 4+ pairs in CeVO 4 . Besides, constructing heterojunctions between La 2 O 3 and CeVO 4 can inhibit the recombination of photoinduced electrons and holes, which is ascribed to the La 3+ as electron trap to enhance the charge transfer. According to the trapper experiments and Electron Spin Resonance (ESR) analysis, the h + and •O 2− are major reactive species during the degradation. In addition, the oxygen vacancies are in the ternary photocatalyssts. The photocatalytic degradation intermediates of the solution were identified by High performance liquid chromatography-Mass spectra (HPLC-MS).
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Bingjie Huo,Jingxue Wang,Zichen Wang,Chao Liu,Wenjing Hao,Yinglong Wang,Peizhe Cui,Jianguang Qi,Jun Gao,Jingwei Yang,Fanqing Meng
Wood is a natural material with low cost and easy recovery, which porous, layered, excellent structure and mechanical properties make it possible to apply in wastewater treatment. We have successfully grown MoS 2 on natural wood containing porous cellulose and introduced the high conductivity circuit path provided by Ni nanoparticles to construct a new piezoelectric three-dimensional wood block for the efficient degradation of tetracycline. Ni/MoS 2 /Wood exhibited excellent piezo-catalytic degradation performance, and the degradation rate of tetracycline reached 95.96 % (k = 0.0411 min −1 ) under ultrasonic vibration. After 5 cycles, the degradation rate still reached 90.20 %. In addition, Ni/MoS 2 /Wood was used as the reactor filler to degrade tetracycline through piezoelectric response triggered by hydrodynamic force, and the degradation rate reached 90.27 % after 60 min. Further, the mechanism and the possible degradation pathways of tetracycline degradation were proposed. This low-cost, recyclable and stable three-dimensional wood block piezoelectric material provides a new idea for the practical application of wastewater treatment.
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
Nanomaterials
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2024
·Vol. 14
·期 16
·1352
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IF 4.4
Teng Gao,Hongqi Chu,Shijie Wang,Zhenzi Li,Wei Zhou
Photocatalysis is the most promising green approach to solve antibiotic pollution in water, but the actual treatment effect is limited by photocatalytic activity. Herein, Bi and BiOCl were loaded onto the surface of Ce-MOF (metal–organic framework) using an electrostatic adsorption method, and a special ternary heterojunction of Ce/Bi/BiOCl was successfully prepared as a photocatalyst for the degradation of tetracycline (TC). FTIR demonstrated that the obtained photocatalyst contains functional groups such as -COOH belonging to Ce-MOF and characteristic crystal planes of Bi and BiOCl, indicating the successful construction of a ternary photocatalyst. The results of UV–vis absorption spectra confirm that the band gap of Ce/Bi/BiOCl heterojunction is reduced from 3.35 eV to 2.7 eV, resulting in an enhanced light absorption capability in the visible light region. The special ternary heterojunction constructed by Ce-MOF, Bi, and BiOCl could achieve a narrow band gap and reasonable band structure, thereby enhancing the separation of photogenerated charges. Consequently, the photocatalytic performance of the Ce/Bi/BiOCl ternary heterojunction was significantly enhanced compared to Ce-MOF, Bi, and BiOCl. Therefore, Ce/Bi/BiOCl can achieve a photocatalytic degradation rate of 97.7% within 20 min, which is much better than Bi (14.8%) and BiOCl (67.9%). This work successfully constructed MOF-based ternary photocatalysts and revealed the relationship between ternary heterojunctions and photocatalytic activity. This provides inspiration for constructing other heterogeneous catalysts for use in the field of photocatalysis.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Xiang Yu,Jiaoming Wang,Xionghui Fu,Hui Meng,Yi Zhu,Yuanming Zhang
In this work, we successfully constructed visible-light-driven Z-scheme SrTiO 3 /Ag/Ag 3 PO 4 photocatalyst with oxygen vacancies, which exhibited highly enhanced performance for antibiotic tetracycline (TC) photodegradation compared with pure Ag 3 PO 4 and SrTiO 3 . SrTiO 3 /Ag/Ag 3 PO 4 (1:3) exhibited the best photocatalytic performance under visible light illumination, the rate constant k of which was about 2.72 and 18.55 folds higher than that of Ag 3 PO 4 and SrTiO 3 , respectively. No significant deactivation of photocatalytic performance over SrTiO 3 /Ag/Ag 3 PO 4 (1:3) after five consecutive cycles confirmed an enhanced stability, compared to pure Ag 3 PO 4 , which showed 22.1% decrease in photocatalytic activity under the same condition. The significantly boosted photocatalytic activity of the composites could be ascribed to the improved stability of Ag 3 PO 4 , superior carrier separation efficiency and higher redox capacities resulted from Z-scheme, in which metal Ag played the role as the charge transmission-bridge to quench electrons from conducting level of Ag 3 PO 4 with holes from defect levels of SrTiO 3 with oxygen vacancies under visible light illumination. Furthermore, a possible degradation pathway for TC was also proposed based on HPLC-MS. The work offered an excellent reference for further understanding and constructing Z-scheme heterojunctions which were potential candidates for degrading antibiotics in environmental purification.
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
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yixiao Wu,Xuesong Zhao,Shaobin Huang,Yihao Li,Xiaoqian Zhang,Gongchang Zeng,Lishan Niu,Yu Ling,Yongqing Zhang
Photocatalytic oxidation using solar energy is a promising green technology to degrade antibiotic contaminants. Herein, a 2D g-C 3 N 4 supported nanoflower-like NaBiO 3 with direct Z-scheme heterojunction was synthesized via a facile hydrothermal approach, and the photocatalytic performance of g-C 3 N 4 /NaBiO 3 was remarkable better than that of g-C 3 N 4 and NaBiO 3 for tetracycline degradation under visible light. Photoinduced electrons accumulated on the conduction band of g-C 3 N 4 and holes gathered on the valence band of NaBiO 3 , which was more suitable for generating superoxide and hydroxyl radicals . Meanwhile, the built-in electric field between g-C 3 N 4 and NaBiO 3 was proved by their different work functions based on DFT calculations , which enhanced the charges separation. The formed radicals were determined by ESR, and their role in the degradation of tetracycline was examined by the active species trapping test. Moreover, the sites attacked by free radicals and degradation pathways for tetracycline were inferred by the results of Gaussian 09 program and HPLC-MS. The effects of water matrix and three other organic contaminants was further studied for actual use evaluation. Importantly, the prepared g-C 3 N 4 /NaBiO 3 showed stable photodegradation activity for eight cycles. This work not only provides a promising photocatalyst, but also gets insight into the photocatalytic removal of tetracycline.
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
CHEMOSPHERE
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2022
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IF 8.943
Hanlin Wang,Haibo Liu,Xuehua Zou,Fuwei Sun,Luyao Wang,Jingchao Hu,Dong Chen,Meng Liu,Jianfei Shen,Tianhu Chen
In this work, the effect of Co substitution in the Fe 1-x S (CSP) on the activation of H 2 O 2 to degrade tetracycline (TC) is investigated. A series of CSP samples with different Co content are synthesized via a high-temperature sulfidation method and characterized by XRD , XPS , SEM, and electrochemical analysis . The result showed that low Co content (≤1%) promotes the catalytic activity of Fe 1-x S, while excessive Co (1%﹤x ≤ 3%) inhibits its catalytic activity. The investigation of Behnajady-Modirshahla-Ghanbery kinetic model (BMG) showed that the maximum initial degradation rate of TC over 1.0% CSP/H 2 O 2 was 1.6 times than that of in CSP/H 2 O 2 system. The Box-Behnken with Response Surface Methodology was employed to verify optimum condition for TC degradation. The quenching experiments and ESR determined that ·OH, ·O 2 − and 1 O 2 were involved in TC degradation with the treatment of 1.0% CSP/H 2 O 2 system. Electrochemical analysis, ·OH quantification, and metal ion concentrations measure reveal that Co substitution accelerates electron transfer efficiency and Fe 2+ regeneration. Furthermore, nine intermediates are identified and the possible degradation pathway of TC is proposed. The unique effect of Co provides novel insight and efficient strategies for improving the reactivity of iron sulfide.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Jingkun Zhao,Meijie Gao,Zixin Wu,Siyu Gao,Zhongyan Hu,Shangru Zhai,Qingda An,Zuoyi Xiao,Gongbing Zhou
The extensive therapeutic use of tetracycline (TC) in human and veterinary healthcare systems has resulted in notable environmental persistence, with detectable residues increasingly documented in aquatic ecosystems worldwide. While photocatalytic technology has been widely applied for TC degradation, improving the photocatalytic activity of catalysts remains a critical challenge. Improving charge separation efficiency is a key approach to enhance the activity of photocatalysts. In this work, we successfully coupled g-C 3 N 4 and CaMoO 4 on 3D porous carbon via a hydrothermal method. The photocatalytic properties of the composites were determined through the degradation of TC under visible light. Under simulated visible light irradiation, the results demonstrated that the g-C 3 N 4 /CaMoO 4 @C achieved 94.8% degradation of TC under 90 min of light exposure, significantly outperforming pure g-C 3 N 4 and pure CaMoO 4 , which achieved only 39.7% and 39.2% degradation in the same period. And the g-C 3 N 4 /CaMoO 4 @C achieved 73.59% removal of total organic carbon. The photocatalytic activity was investigated by adjusting key parameters, including TC solution pH, initial concentration, and catalyst dosage. The morphology, structure and composition of the catalysts were characterized by XRD, XPS and TEM characterization techniques, and the reasons for the improved performance of the composite photocatalysts were analyzed by combining the results of UV-Vis and PL characterizations, and the photocatalytic mechanism of the catalysts was further explored by ESR characterization.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wan-Ying Li,Jing Liu,Zhi-Rong Li,Ting-Ting Shen,Jun Chen,Zhi-Yi Hu,Wen-Bei Yu,Yu Li,Bao-Lian Su
ZnIn 2 S 4 (noted as ZIS) has great potential in tetracycline degradation due to its suitable band gap structure and great light absorption capability. However, its serious photo-corrosion results in the deactivation of photocatalytic activity. In this work, we try our best to probe the deactivation and regeneration of ZnIn 2 S 4 in photocatalytic degradation of tetracycline. EPR, XPS, and PL results reveal that the deactivation mechanism of ZIS is due to the breakage of Zn-S bonds which results in excessive sulfur vacancies. After choosing Na 2 S as regenerant, the degradation rate in second cycle increased from 57.4 % to 88.1 % and improved from 30.3 % to 76.8 % in third cycle. Ab initio molecular dynamics simulations (AIMD) and density functional theory (DFT) calculations are further conducted for the regeneration mechanism. These results confirm that the negatively charged ions (HS − and OH − ions) produced by hydrolysis of the Na 2 S are attracted to the positively charged sulfur vacancies, promoting the re-bonding of Zn-S bonds and thereby relieve excessive sulfur vacancies. This work not only provides a detailed discussion of performance deactivation caused by photo-corrosion of ZnIn 2 S 4 but also offers new insights into the regeneration mechanism of ZnIn 2 S 4 .
研究领域:
环境科学
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材料科学
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化学
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DOI
PubMed
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
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Zhiquan Chen,Didi Yang,Zhenda Liang,Yongtao Xu,Yijun Pang,Gang Xu,Chaoxiang Chen,Kunyu Ma,Li Zhou,Bing Yan
Microbial pollution and antibiotic contamination can pose a serious threat to human health. The rational development of efficient and low-cost methods is critical to solving these problems. In this study, novel Z-scheme heterojunctions consisting of Yb-MnO 2 and nitrogen-doped carbon quantum dots (N-CQDs) were fabricated to achieve efficient photocatalytic degradation of tetracycline (TC) and the destruction of bacteria ( Escherichia coli used as a model). Results showed that the Yb-doping strategy improves the characteristics of host MnO 2 by weakening the lattice interface and increasing its surface area. Compared with Yb-MnO 2 , Yb-MnO 2 /N-CQDs heterostructures exhibited superior photocatalytic activity in TC degradation under simulated solar light. The remarkable photocatalytic and mild oxidation abilities of Yb-MnO 2 /N-CQDs led to an impressive 97.88% removal rate of TC. Additionally, the structure displayed robust resistance to various ions and broad pH levels. Notably, the Yb-MnO 2 /N-CQDs heterostructures exhibited excellent bactericidal activity, with no observed bacterial resistance even after 20 consecutive trials. Furthermore, quenching experiments demonstrated that 1 O 2 and O 2 − were the primary radicals involved in the Yb-MnO 2 /N-CQDs-based photocatalysis process. The remarkable photocatalytic activity of Yb-MnO 2 /N-CQDs can be attributed to two key factors. Firstly, the large surface area and abundant oxygen defects provide rich active sites for reactant degradation. Secondly, the Z-scheme heterojunctions formed between Yb-MnO 2 and N-CQDs effectively facilitate the separation of photogenerated electron-hole pairs and increase the reduction/oxidation potentials for reactive oxygen species generation. This study presents a promising novel photocatalyst for the facile and energy-saving treatment of antibiotic and microbial pollution, and it may provide new insight into the design of highly efficient heterogeneous photocatalysts.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Qingqing Chai,Jiahan Dong,Xiaofang Yu,Xiaoke Zhang,Jun Li,Sheng Guo,Yiling Yang
Photocatalytic oxalic acid (OA) activation for pharmaceutical wastewater degradation based on Fe-based catalysts are usually limited by the cycle of Fe 3+ /Fe 2+ and low conversion efficiency of OA. Herein, an effective OA activator, FeOOH loaded FeWO 4 /WO 3 (FFW) heterojunction photocatalyst, were fabricated by electrostatic self-assembly for tetracycline (TC) degradation. Experimental results revealed that the introduction of FeOOH can greatly enhance the optical absorption and separation efficiency of photogenerated carriers of the FeWO 4 /WO 3 (FW) composite. Moreover, optimized FFW heterojunction exhibited the excellent photocatalytic OA activation activity and the highest OA conversion rate for TC degradation, which exhibited 97.3% photocatalytic performance for TC within 30 min under 420 nm light irradiation. The FFW heterojunction still revealed high photocatalytic OA activation activity for TC degradation even after six cycles. The possible degradation pathway of TC and photocatalytic OA activation mechanism of FFW heterojunction were also presented by ESR spectroscopy results, quenching tests, and LC-MS analysis. This work not only provides a fresh perspective on the surface photo-Fenton chemistry of catalytic redox processes, but also presents a valid reference for designing highly efficient photocatalytic OA-activation systems for pharmaceutical wastewater treatment .
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
危险品化学品经营许可证（带存储）