PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Yujie Zhang,Zexin Cui,Rongfang Yuan,Huilun Chen,Beihai Zhou
As the persistent contamination of water sources with antibiotics poses a growing environmental challenge, effective strategies for the degradation of such pollutants are urgently needed. Herein, a novel organic-inorganic Z-scheme heterojunction material, reduced Graphene Oxide (rGO)@PANI/SnO 2 , was prepared for the photocatalytic degradation of sulfadiazine (SD). When the PANI/SnO 2 with PANI doping amount of 1% was loaded on 1% rGO, the catalyst showed the best photocatalytic activity, with a reaction rate constant of 0.184 h -1 , which was 32.8 and 7.19 times higher than that of PANI and SnO 2 , respectively. The improved photocatalytic activity was mainly due to the high electrical conductivity of rGO and the formation of a Z-scheme heterojunction between PANI and SnO 2 , which effectively facilitated the transfer of photogenerated carriers. Quenching experiments showed that ·OH is the main active species. Besides, Density Functional Theory (DFT) calculations found that the sulfonamide bond and pyrimidine heterocyclic were vulnerable site in the SD. Then, four possible degradation pathways were proposed, primarily involving the breaking of the sulfonamide bond and the ring-opening of the pyrimidine heterocycle. The response surface method (RSM) was used to confirm that the removal of SD was affected by the single factor of initial SD concentration, pH value and catalyst dosage, and the magnitude of the effect of different parameters was in the order of pH > catalyst dosage > SD concentration. It was found that Cl - and SO 4 2- inhibited the photocatalytic process, whereas HCO 3 - facilitated the process through its ability to produce ·OH by hydrolysis and provide a weakly alkaline environment. This work provides novel ideas for the preparation of organic-inorganic heterojunction photocatalysts and enhances the application of organic materials in the photocatalytic degradation of antibiotics in water.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Yuxi Liu,Wenjing Zhang,Weimeng Chi,Yuxuan Liu,Ying Chen,Yuning Liang
As a potential Fenton catalyst, Fe-based organic frameworks (Fe-MOFs) severely limit their application in practical heavy pollution due to their slow cycling rate. In this work, a novel photocatalyst (NH 2 -MIL101(Fe, Cu)/WO 3 ) was synthesized using a two-step hydrothermal method. Research on photocatalytic activity revealed that NH 2 -MIL101(Fe, Cu)/WO 3 , when combined with H 2 O 2 , exhibits higher degradation efficiency compared than pure NH 2 -MIL101(Fe, Cu) or WO 3 alone, achieving up to 90 % degradation of levofloxacin (LEV) under visible light irradiation. In addition, the effects of hydrogen peroxide dosage, pH and other factors on degradation performance were studied, and the results demonstrated good stability even after multiple cycles. This excellent photocatalytic performance is attributed to the formation of heterogeneous structures as well as the doping of copper ions. This not only inhibits the electron-hole recombination, but also improves the redox capacity of the catalyst accelerating the regeneration of Fe 3+ . This work offers a way to enhance the photo-Fenton activity of Fe-MOF-based catalysts.
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Zhang Yu,Xiao Xinyan,Wang Fei,Lu Ting,Cheng Xia
Photocatalytic degradation of dye wastewater has great potential due to its eco-friendly, simple, and solar energy-based characteristics. In this work, an energy-saving and convenient precipitation method was explored to compound two classical photocatalyst materials BiOBr and CAU-17. The Z-scheme heterojunction decreases the agglomeration of the BiOBr nanosheets and addresses the issue of the low photogenerated carrier participation rate of CAU-17. The solvothermal method was used to prepare CAU-17 nanorods, and then BiOBr nanosheets were grown on them at room temperature to fabricate BiOBr/CAU-17 composites. The samples were characterized by XRD, SEM, TEM, XPS, DRS, PL, EIS, and other techniques. The photodegradation performance was tested using Rhodamine B (RhB) as the model pollutant. The 80% BiOBr/CAU-17 composite (0.1 g/L) exhibited a degradation rate of 99.41% for RhB under simulated sunlight in 60 min, with an apparent rate constant of 0.0631 min⁻ 1 , which is 3.45 times faster than pure BiOBr and 315.5 times faster than CAU-17. Free radical capture and EPR tests confirmed that · O 2 ⁻ and h⁺ were the main active species in the process, and a reasonable photocatalytic mechanism is proposed. Additionally, cyclic tests are conducted to confirm the stability and durability of the composite, proving the potential of BiOBr/CAU-17 composites for efficient and sustainable photocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Gao Zixiang,Liu Fuyu,Chen Zongwei,Song Qiang,Cullen Patrick J.,Zhang Xiaoyu,Zuo Zhihong,Zhong Jun,Lu Xize,Hu Zhuofeng,Liu Runzeng,Zhang Qingzhe,Yin Yongguang,Cai Yong
Solar-driven H 2 O 2 production provides an eco-friendly and scalable alternative to conventional anthraquinone processes. However, its efficiency has been limited by the inefficient charge separation and poor selectivity for the two-electron oxygen reduction reaction (2e - ORR). Here we report a Z-scheme heterojunction photocatalyst constructed by in-situ growth of sulfur-deficient ZnIn 2 S 4 nanosheets onto UiO-66-NH 2 (a zirconium-based metal-organic framework). This heterojunction promotes efficient charge separation while retaining strong redox capability, and sulfur vacancies regulate O 2 adsorption into a configuration that suppresses O-O bond cleavage and favors 2e - ORR. As a result, the composite achieves a high H 2 O 2 production rate of 3200 μmol g -1 h -1 with 94.3% selectivity in pure water under ambient air and visible light. A continuous-flow prototype exhibits stable performance for over 200 h, and the generated H 2 O 2 solution enables direct bacteria disinfection. Spectroscopic and theoretical analyses reveal the critical role of sulfur vacancies in optimizing O 2 activation. Our findings highlight a synergistic strategy of tuning charge dynamics and O 2 adsorption configurations for designing next-generation systems for sustainable H 2 O 2 production and water disinfection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangcheng Shan,Xiao Yang,Fuyu Liu,Xiaoyu Zhang,Jiazhe Chen,Dehao Liu,Qingzhe Zhang,Runzeng Liu,Yongguang Yin,Yong Cai
The photocatalytic reduction of highly toxic and soluble U(VI) to low toxic and insoluble U(IV) represents an environmentally friendly and efficient approach for uranium extraction. However, the application of photocatalytic U(VI) reduction is limited by low efficiency and challenges in recovering powder catalysts. In this study, we develop magnetically recyclable photocatalysts by integrating Fe 3 O 4 particles with in-situ grown ZnIn 2 S 4 /CdS Z -scheme heterojunctions (FO@ZIS/CS). Without adding any sacrificial agents, about 100 % of U(VI) in 50-mL aqueous solution (20 mg/L) is reduced by FO@ZIS/CS within 30-min visible light irradiation, which is 2.8 times higher than that of pristine ZnIn 2 S 4 (36 %). The remarkable performance is attributed to the Z -scheme heterojunction formed between ZnIn 2 S 4 and CdS, which promotes charge separation and preserves strong redox capabilities. Comprehensive experiments and theoretical simulations reveal that S and In atoms on ZnIn 2 S 4 (110) facets act as the active species for the U(VI) adsorption and reduction. Moreover, the FO@ZIS/CS photocatalyst maintains high U(VI) reduction efficiency in complex water matrices. The used FO@ZIS/CS and the adsorbed U(IV) can be easily recovered by an external magnetic field. This work offers a practical strategy for reducing and extracting U(VI) from mining wastewater, achieving both environmental remediation and resource recycling objectives.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jiayi Chen,Xinyan Xiao,Yi Wang,Zhihao Ye
Novel hierarchical sheet-on-sheet WO 3 /g-C 3 N 4 (WOCN) composites were successfully fabricated by simple calcination method using acid-treated SrWO 4 /g-C 3 N 4 as precursors. The morphological observation showed that WO 3 nanosheets were closely anchored on the surface of g-C 3 N 4 nanosheets to construct a hierarchical nanostructure . The as-synthesized WOCN composites exhibited a significantly higher photocatalytic activity towards the photocatalytic degradation of rhodamine B (RhB) compared to pristine g-C 3 N 4 and WO 3 under simulated sunlight irradiation. The optimum photocatalytic activity of the WOCN at a WO 3 mass content of 34.6% was 6.5 and 3.0 times higher than that of pristine WO 3 and g-C 3 N 4 , respectively. The enhanced photocatalytic activities of WOCN composites were attributed to the formation of hierarchical heterostructure , which provided larger specific surface area, better visible-light absorption capability, reduced the recombination of photogenerated electron-hole pairs and enhanced separation efficiency of charge carriers. A Z-scheme photocatalytic mechanism was proposed according to active species trapping experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Weijie Lei,Hao Wang,Xiaojing Zhang,Zhimao Yang,Chuncai Kong
As competitive photocatalysts , Cu 2 O nanoparticles meet with severe photogenerated carries recombination and insufficient light absorption, leading to the poor photocatalytic performance. Herein, the truncated Cu 2 O-Au (CA) binary and Cu 2 O-Au-TiO 2 (CAT) ternary octahedra with Au nanoparticles (Au NPs), preferentially supported on the (110) and (100) planes of Cu 2 O, are synthesized for efficient photocatalytic degradation reactions. The photodegradation rates of MO of CA1 (Cu 2 O-Au containing 1 wt % Au) and CAT are as high as 95.61% and 96.5% under 60 min of visible light irradiation, respectively. On the one hand, the synergistic function of localized surface plasmon resonance (LSPR) of Au NPs and Schottky barrier accelerate the separation and transfer of photogenerated carriers. On the other hand, a Z-scheme electron transfer system is constructed in CAT to promote the photodegradation performance. According to the finite-difference-time-domain (FDTD) simulation result, there is a strong electric field enhancement at the contact sites between Au, Cu 2 O and TiO 2 , which accelerates the electron transfer to a large extent and separates the electron-hole pairs. Therefore, this work may provide an approach for the synthesis and applications of multiple heterostructure catalyst.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 7
·957
·
IF 4.034
Pengchao Li,Baohua Zhu,Peng Li,Zhihao Zhang,Luyao Li,Yuzong Gu
CdSe-reduced graphene oxide (CdSe/RGO) composites were synthesized by a hydrothermal method. CdSe/RGO composites with different mass ratios were prepared. The structure and morphology of CdSe/RGO composites were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesis of CdSe/RGO complexes was successfully demonstrated by Fourier infrared (FT-IR) and Raman spectra. CdSe nanoparticles in the CdSe/RGO composite were uniformly dispersed on the graphene surface. The study found that oxygen-containing functional groups such as hydroxyl (-OH) and carboxyl (-COOH) groups in graphene played a decisive role in the dispersion of CdSe. The third-order nonlinear optical properties of CdSe/RGO composites were measured by a single beam Z-scan technique. The experimental results showed that composites exhibited two-photon absorption and self-focusing nonlinear refraction properties. Additionally, the third-order nonlinear susceptibility of the composite material was obviously enhanced, which was mainly due to the good dispersion of CdSe nanoparticles on graphene.Keywords:CdSe/RGO nanocomposites;carboxyl groups;third-order nonlinear optical property;Z-scan technique;good dispersion
研究领域:
材料科学
·
光学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2022
·Vol. 55
·期 42
·424005
·
IF 3.409
Chang Wang,Ran Duan,Xingcheng Xiao,Yingwei Wang,Zhihui Chen,Yejun Li,Si Xiao,Jun He
Long hexagonal Co3(PO4)2·4H2O nanosheets were synthesized using a hydrothermal method, where their nonlinearity was probed via a femtosecond Z-scan system. The results show that the Co3(PO4)2·4H2O nanosheets exhibit saturable absorption when the incident photon energy is greater than the forbidden band width, while optical limiting is found when the incident photon energy is smaller than the forbidden band width. In particular, the obtained Co3(PO4)2·4H2O nanosheets demonstrate the best optical limiting properties at 600 nm. The present study suggests the cobalt phosphates nanosheets as a promising candidate for optical limiters.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
MICROBIAL PATHOGENESIS
·
2024
·
IF 3.3
Zhikun Zhang,Dawei Shi,Haiwei Dou,Ruijie Wan,Qing Yuan,Peng Tu,Deli Xin
In previous study, lower levels of serum GP130 were reported in children with MPP. GP130 is an important signal transducer, the down regulation of which may influence host immune responses. In this study, we aimed to analyze the regulatory mechanism of GP130 during MP infection. Firstly, the mRNA and protein levels of GP130 both decrease and then increase with increasing multiplicity of infection (MOI: 1 to 40) of MP. The lowest levels of GP130 were detected at MOI of 5. Then, heat treated MP but not trypsin treated MP or MP extracted proteins show regulatory effect to the expression of GP130. These indicate that the down regulation of GP130 is related to protein mediate adhesion process of MP. Gene expression analysis revealed that MP affected apoptosis and the TLR4 pathway in infected cells, and the mRNA level of IL-6 was correlated with that of GP130. Further, Z-VAD-FMK (pan-caspase inhibitor) can suppress the apoptosis induced by MP infection and restore GP130 at protein level. Further studies revealed that MP infection promoted TLR4 internalization but did not activate the NF-κB pathway. The levels of surface TLR4 showed correlation with the transcription of IL-6 and GP130. TAK242 (TLR4 inhibitor) and PS341 (proteasome inhibitor) can restore the decreased transcription of GP130, both of which were able to promote NF-κB pathway activation in MP-infected cells. These suggested that the regulation of TLR4/NF-κB pathway and induced apoptosis post MP infection are involved in the down-regulation of GP130 at transcription and protein levels, respectively.
研究领域:
微生物学
·
免疫学
·
细胞生物学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Liang Geng,Wenjun Li,Mei Dong,Xiaohui Ma,Ajmal khan,Yanyan Li,Mengchao Li
The separation of photogenerated carriers and the efficient utilization of high-level energy electrons (HLEEs) are the key processes for improving the performance of photocatalysts. Herein, Ce 2 Ti 2 O 7 /ZnIn 2 S 4 (CTOZIS) and Bi 3+ -doped Ce 2 Ti 2 O 7 /ZnIn 2 S 4 (BCTOZIS) photocatalyst were successfully synthesized through hydrothermal method . The photocatalytic hydrogen production of CTOZIS and BCTOZIS was 1233.7 μmol g −1 and 4168.5 μmol g −1 under visible light irradiation (λ ≥ 420 nm) within 5 h, which was 2.3 and 7.6 times than that of pure ZnIn 2 S 4 , respectively. X-ray photoelectron spectroscopy, photoluminescence spectroscopy and electrochemical characterization demonstrated that after Bi 3+ doping, the electron-hole pairs recombination of BCTOZIS was inhibited, which may be ascribed to the establishment of a Z-scheme heterojunction and the presence of oxygen vacancy and Ce 4+ /Ce 3+ redox center. The doping of Bi 3+ resulted in the adjustment of the valence band position of Ce 2 Ti 2 O 7 from 1.98 V to 1.92 V. This adjustment enabled direct transfer of HLEEs generated in Ce 2 Ti 2 O 7 to the conduction band of ZnIn 2 S 4 for hydrogen production with a wavelength below 423 nm. The synergistic effect of conventional Z-scheme electron transfer and the unique utilization of HLEEs boosted the photocatalytic performance of BCTOZIS. This study affords an innovative insight for designing visible-light-driven photocatalysts with high photocatalytic activity .
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Qingyong Li,Fulei Wang,Yuxiang Hua,Yuting Luo,Xiaoheng Liu,Guorong Duan,Xujie Yang
A series of novel visible-light-driven Ag/Ag 3 PO 4 /WO 3 (AAPW) Z-scheme heterostructures were fabricated using a facile deposition-precipitation method followed by photo-reduction without adding any surfactant . To explore more deeply about the photocatalytic activity of AAPW nanocomposites under neutral and strongly acidic/alkaline conditions, we investigated their photocatalytic rhodamine B (RhB) efficiency at different pH value that was controlled by adding HNO 3 or NaOH aqueous solution. It was found that as-prepared AAPW photocatalysts showed enhanced photocatalytic RhB efficiency under neutral and even strongly acidic/alkaline environment. The process of charge carrier separation and transfer in the AAPW nanocomposites and Z-scheme mechanism for RhB degradation were described in sufficient detail based on systematical characterizations and measurements. The silver particles introduced to build AAPW Z-scheme structure should contribute to more efficient charge separation, resulting in enhanced photocurrent response and photocatalytic activity . We expect that this work will provide systematic study concerning Z-scheme Ag/Ag 3 PO 4 /WO 3 structure, and fulfill the research about photodegrade activity of catalyst under strongly acidic/alkaline conditions.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）