Catalysts
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2025
·Vol. 15
·期 8
·771
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IF 4
Yufeng Qin,Xinyu Peng,Tong Wu,Yi Zhong,Hong Xu,Zhiping Mao,Linping Zhang
As a common semiconductor material, BiOBr has a unique layered structure and a suitable bandgap. However, the slow electron–hole separation efficiency leads to poor photocatalytic performance. To solve this problem, BiOBr/BNQDs heterojunctions were constructed. BiOBr/BNQDs composite photocatalysts were prepared by the solvothermal method, and the cocatalyst BNQDs were loaded onto BiOBr via electrostatic adsorption to enhance the photocatalytic degradation activity towards Rhodamine B (RhB). The photocatalysts were characterized by FT-IR, XRD, XPS, SEM-EDS, UV-Vis, PL, EIS, etc. Compared with pure BiOBr, the construction of heterojunctions BiOBr/BNQDs realized the rapid elimination of weak carriers and the effective separation and enrichment of high-energy carriers, which improved the efficiency of photocatalytic degradation of RhB. Among them, BiOBr/BNQDs-8.3% demonstrated the highest photocatalytic activity. The degradation rate of RhB under visible light irradiation for 60 min was up to 98.56%, and the reaction rate constant was 0.0696 min−1, which was 2.80 times that of pure BiOBr. Moreover, after five photocatalytic cycles, the degradation rate was still 87.58%, demonstrating good cycling stability.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2025
·
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
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Zuyao Fu,Ze Chen,Lingfeng Yang,Hao Wang,Jing Xie,Zhaoyang Ding
The misuse of malachite green (MG) has led to significant water pollution, and its metabolite, leucomalachite green (LMG), poses a serious health risk. Rapid detection of drug residues in aquaculture is crucial for food safety. In this study, the dual-emission fluorescent sensor RhB@Tb-MOF (RhB = Rhodamine B) was synthesized based on fluorescence resonance energy transfer (FRET). MG significantly quenches the fluorescence of RhB and affects the fluorescence of Tb-MOF to different extents, making it a suitable ratiometric fluorescent sensor for sensitive MG detection with a limit of detection (LOD) of 9.6 × 10 −3 μg/mL. Although LMG did not affect the fluorescence of RhB@Tb-MOF, it formed a ratio with the fluorescence of RhB@Tb-MOF due to its intrinsic fluorescence properties, and the LOD was 3.5 × 10 −3 μg/mL. Additionally, increasing MG concentrations shifted the sensing system's color from pink to blue, with a colorimetric LOD of 0.15 μg/mL. This paper introduced a colorimetric/fluorescent dual-mode sensor for MG and LMG detection. Furthermore, this sensor was combined with smart labeling technology to achieve rapid on-site quantification of MG, offering significant potential for broad application.
研究领域:
食品安全
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分析化学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
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2022
·Vol. 37
·期 5
·1070-1082
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IF 2.909
Wang Bo-Yuan,Li En-Di,Zong Yi-Chao,Wang Xiao-Bo,Yuan Jun,Zhang Fu-Qing
A well-defined structure is greatly helpful to enhance the performance of photocatalysis. Herein, we plan to fabricate multi-shell CeO 2 photocatalyst with hollow structure characters for enhanced photodegradation RhB efficiency. The SEM showed that the samples were the regular micro-spheres with a diameter of 1.5–2 μm, and the TEM image displayed these microspheres having multi-shell hollow structures with core–shell morphology. The RhB was degraded (83%) under visible light irradiation within 150 min. This multi-shell hollow CeO 2 (MSH-CeO 2 ) has a larger surface area and more oxygen vacancies (OVs), the catalytic performance is mainly improved by enhancing the light absorption properties and facilitating the separation efficiency of the electron-holes. This work introduces the effecting of morphology on the performance of the catalyst, which will provide a new idea for the construction of efficient photocatalysts. Graphical abstract
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 Environmental Chemical Engineering
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2022
·
IF 7.968
Xingyan Chen,Lifen Liu
In advanced oxidation processes (AOPs), organic pollutants are oxidized, but getting the most energy out of pollutant in reducing cost of AOPs is still a challenge. In this study, MoS 2 / Co 0.75 Mo 3 S 3.75 composite nano-catalyst with high density catalytic active sites was synthesized by homogeneous and dispersed doping of single Co atoms in MoS 2 by one-step hydrothermal method. The prepared catalyst was coated on stainless steel with silica sol for electrode application under visible light and activation of PMS (peroxymonosulfate) in Photocatalytic fuel cell (PFC) system. The synergy system at pH 6.5, visible light irradiation and 0.06 mM [PMS], was able to rapidly degrade RhB (50 mg·L −1 ) within 10 min and reach 98% degradation within 21 min (kinetic rate constant 0.261 min −1 ). The role of visible light contributes to RhB degradation more than oxidation by just PMS in PFC (Photocatalytic Fuel Cell). The dispersed Co sites have a significant effect of activating PMS, improving catalytic activity and enhancing reaction under closed circuit. The system has good stability, is also applicable to significant removal of tetracycline(TC, 76.35%) and bisphenol A (BPA, 53.76%). In MoS 2 / Co 0.75 Mo 3 S 3.75 -vis/PMS/PFC, species such as •OH, SO 4 •− , O 2 •− , h + and 1 O 2 jointly promote the degradation of RhB. This work provides a perspective for further study of two-dimensional metallic sulfide doped with transition metal ions and application of such vis/PMS/PFC system in removing other toxic pollutants .
研究领域:
环境科学
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材料科学
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化学工程
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电化学
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催化
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Renji Zheng,Jing Li,Runliang Zhu,Ranhao Wang,Xuezhen Feng,Zhijie Chen,Wenfei Wei,Dazhong Yang,Hong Chen
Wastewater with complex compositions of both heavy metals and organic pollutants is of critical environmental and socioeconomic threat worldwide, which urgently requires feasible remediation technologies to target this challenge. In this study, natural chalcopyrite (CuFeS 2 , NCP), the most abundant copper-based mineral in the Earth's crust , has been discovered to be a heterogeneous catalyst that can activate peroxydisulfate (PDS) for the simultaneous degradation of organic pollutant Rhodamine B (RhB) and reduction of hexavalent chromium (Cr(VI)). Batch experimental results indicate that both RhB and Cr(VI) could be simultaneously removed under a near-neutral condition in NCP/PDS combined system. The radicals SO 4 •− and • OH generated from PDS activation are the main oxidative species detected by electron paramagnetic resonance (EPR) spectroscopy. SO 4 •− acted as a predominant role in RhB degradation, while Cr(VI) reduction is mainly attributed to the oxidization of S 2− and S 2 2− species on NCP surface, as well as the photoreduction performance of NCP, which could be enhanced by the intermediates generated from RhB degradation. Density functional theory (DFT) calculation results disclose that Fe is the critical catalytic site for PDS activation. This work demonstrates a user-friendly strategy for remediation of complex wastewater containing both heavy metal and organic pollutants by combining photoreduction and advanced oxidation processes (AOPs) with natural minerals. It paves a way for wastewater treatment by utilizing low-cost natural abundant minerals as catalysts.
研究领域:
环境科学
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矿物学
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废水处理
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2020
·
IF 0
Yi Qi,Quan Zuo,Yuqing Mei,Tongjie Yao,Jie Wu
Environmental pollution caused by persistent organics has drawn intensive attention. Microwave-assisted Fenton reaction (MAFR) was a rapid and effective technique for their removal. Herein, a sponge-templated method was introduced for the scalable preparation of two-dimensional (2D) porous NiCo2O4 sheet. Its surface area was 4.0 times higher than that of NiCo2O4 aggregate prepared without a sponge template. Control experiments revealed that the hydrophilic surface and restricted growth effect of sponge were essential for shaping sheetlike morphology. According to the response surface methodology, the optimal condition in MAFR was 10 mg of catalyst, 10 mg of peroxymonosulfate, 300 W of microwave power, and 70 °C of temperature, under which 50 mg/L of rhodamine B (RhB) was degraded within 1.5 min. The degradation rate constant was as high as 0.45 min–1, which was about 2.0 times higher than the reaction catalyzed by NiCo2O4 aggregate. SO4•– was identified as the main active species, as 62.2% of RhB removal was inhibited in their absence. The 2D porous NiCo2O4 sheet also exhibited good reusability and stability, Co3+ leaching in NiCo2O4 was only 1/14 that in Co3O4, and 81.7% of degradation efficiency was maintained even after five successive cycles.
研究领域:
环境科学
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材料科学
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DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Weibing Li,Lin Wang,Qiang Zhang,Zhuoyuan Chen,Xiaoyan Deng,Chang Feng,Likun Xu,Mingxian Sun
An ultrathin 2D/2D C 3 N 4 /MoS 2 (U-CN/MoS 2 ) heterojunction photocatalyst was prepared by a simple mechanical grinding technique to investigate the photocatalytic degradation RhB and hydrogen production performance. Physical characterization shows that the ultrathin MoS 2 nanosheets (U-MoS 2 ) can form heterojunction with the ultrathin C 3 N 4 (U-CN), and their intrinsic crystal structure remains stable. Further photocatalytic performance test demonstrated that the U-CN/MoS 2 heterojunction photocatalyst significantly enhanced the photocatalytic activity of U-CN. The U-CN/MoS 2 photocatalyst with 3% mass fraction of MoS 2 station (U-CN/MoS 2 -3) has the optimal photocatalytic performance. Due to MoS 2 has a suitable band structure and can replace noble metal as a co-catalyst, the U-CN/MoS 2 -3 could achieve the hydrogen production efficiency of 385.04 μmol∙h −1 ∙g −1 , which makes MoS 2 show potential in photocatalytic hydrogen production. The enhanced photocatalytic performance was attributed to the significantly enhanced concentration of photogenerated carriers, the effective separation of photogenerated carriers, and suppressed recombination of photogenerated electrons and holes in the photocatalytic reaction.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2014
·Vol. 4
·期 4
·1028-1037
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IF 4.76
Haiping Li,Quanhua Deng,Jingyi Liu,Wanguo Hou,Na Du,Renjie Zhang,Xutang Tao
Bi2MoO6/Zn–Al layered double hydroxide (LDH) hierarchical heterostructures assembled from Bi2MoO6 hierarchical hollow spheres and Zn–Al LDH nanosheets were synthesized by a low-temperature hydrothermal method. X-ray diffraction, Fourier transform-infrared spectroscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy (XPS) confirmed the formation of the Bi2MoO6/Zn–Al LDH composites. Morphologies were characterized by scanning electron microscopy and transmission electron microscopy (TEM). XPS and high resolution TEM indicated the formation of a Bi2MoO6/Zn–Al LDH heterojunction. Increasing the LDH content from 0 to 27.0 wt.% caused the Brunauer–Emmett–Teller (BET) specific surface area of the composites to gradually increase. The photocatalytic degradation activity for Rhodamine B (RhB) under visible light irradiation exhibited a large enhancement, followed by a decrease, with increasing LDH content. The Bi2MoO6/Zn–Al LDH heterostructure composite with LDH content of 5.5 wt.% showed the highest photocatalytic activity and degraded 99% of RhB in 80 min, while Bi2MoO6 degraded less than 50%. The average photocatalytic efficiency is enhanced by more than 100%. The enhanced photocatalytic activity of the Bi2MoO6/Zn–Al LDH heterostructure photocatalyst was mainly attributed to the efficient separation of photoinduced electrons and holes. Superoxide radicals and holes were the major active species. The Bi2MoO6/Zn–Al LDH heterostructure photocatalyst exhibited excellent stability and reusability. A detailed mechanism for its enhanced photocatalytic activity was discussed in this study. This work provides an effective way to fabricate a series of Bi-based and LDH-containing heterostructure photocatalysts.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Minhua Ai,Lun Pan,Ying Chen,Chengxiang Shi,Zhen-Feng Huang,Xiangwen Zhang,Ji-Jun Zou
The periodical distribution of N and C atoms in the carbon nitride skeleton results in intrinsically insufficient light absorption and serious carrier recombination. Herein, an efficient two-step cystine-mediated strategy was developed to alter the structure symmetry of C 3 N 4 via the introduction of alkyl groups and nitrogen vacancies. The experimental analysis and theoretical calculation confirm that the formation of alkyl groups and nitrogen vacancies can modulate band structure and activate n-π* electron transition. Especially, the charge density in CN-25CYS is redistributed with spatial separation of oxidation and reduction sites, suppressing photogenerated charge recombination effectively. Therefore, the distorted carbon nitride (CN-25CYS) exhibits 9.6-times and 15.6-times higher photoreaction rates in hydrogen production and RhB degradation than the pristine one (CN-0CYS), respectively.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
Chemical Physics Impact
·
2024
·
IF 3.8
Mingzhang Liang,Anze Shui,Mei Cai,Hulei Yu
Semiconductor photocatalysis is an efficient technique to degrade the pollutants from wastewater. Herein, the doping of elements and the construction of heterojunctions are used to expand the visible light region and improve the transfer of photogenerated electrons-holes. The La-ZnO/BiOCl (LZB) heterojunction has been synthesized via the hydrothermal method. Furthermore, LZB-0.30 heterojunction is found to possess the optimal photodegradation efficiency of 100 % for RhB solution under the visible light within 45 min. Its degradation rate is ten times faster than that of La-ZnO, owing to positive development of photostimulated charge carriers. In addition, the results demonstrate that LZB-0.30, as an ideal photocatalyst, has great potential applications in the treatment of contaminants, providing a feasible strategy for environmental protection.
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 MATERIALS SCIENCE
·
2019
·Vol. 55
·期 10
·4265-4278
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IF 3.442
Hu Miao,Yan Aihua,Cui Qiaopeng,Huang Fei,Li Dengke,Li Fan,Huang Ji,Qiang Yinghuai
In this work, nickel sulfide (NiS)/bismuth oxybromide (BiOBr) hybrids were synthesized by a two-step hydrothermal method. Some advanced tools were employed to characterize the crystal phase, morphological evolution, light absorption and photocatalytic performance. Significantly, NiS/BiOBr hybrids exhibited enhanced photocatalytic activity toward rhodamine B (RhB) degradation under visible light irradiation. Comparatively, NS/BOB-3.0 showed the highest degradation rate, over 2.5 times higher than that of pure BiOBr. Furthermore, the retarded recombination rate of photogenerated carriers contributed to the improved photocatalytic performance. The results indicate that hybrids may be a promising method for enhancing the photocatalytic ability of BiOX-based semiconductor.
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
危险品化学品经营许可证（带存储）