Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xinyan Wang,Yuting Zhang,Jian Zhang,Chengpeng Shao,Jiaxing Yang,Yuning Zhang,Ruoyi Li,Zheng Xing
In this study, a Z-type heterojunction photocatalyst CoWO 4 /CS/BiOCl-10 was constructed by hydrothermal synthesis for the efficient removal of norfloxacin (NOR) contaminants in water. X-ray photoelectron spectroscopy (XPS) combined with Fourier transform infrared spectroscopy (FT-IR) confirmed that the hydroxyl group in the chitosan (CS) molecule was bonded with the oxygen atom on the surface of CoWO 4 through hydrogen bonding to form a directional charge transport channel, which greatly improved the photocatalytic degradation efficiency of CoWO 4 /CS/BiOCl-10, and the degradation rate was as high as 98.30 % within 90 min under 300 W xenon lamp irradiation. Optoelectronic measurements show that the interfacial potential difference drives electrons to migrate along the Z-path. Density functional theory (DFT) and liquid chromatography-mass spectrometry (LC-MS) were used to identify intermediates in the NOR degradation process, revealing the degradation pathway of NOR through piperazine ring cleavage and defluorination. The kinetics of NOR degradation intermediates were revealed using two-dimensional correlation spectroscopy (2DCOS) techniques. Rice seed germination experiments have shown that the degraded NOR solution is virtually non-toxic, greatly reducing the environmental impact. This study provides a new strategy for the development of efficient photocatalytic systems through the synergistic regulation mechanism of hydrogen bonding and heterojunction.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Kaiyue Li,Wenhui Li,Ping Huang,Yuquan Zhuo,Ziwen Yang,Bo Wang,Runru Liu,Bing Liu,Enzhu Hou,Shuo Yang,Donglai Han
To address the challenge of achieving simultaneous pollutant removal and real-time monitoring in water remediation, Z-scheme Cu 2 O/g-C 3 N 4 /Ag heterostructures with integrated functionalities for synergistic adsorption, photocatalytic degradation, and surface-enhanced Raman scattering (SERS) detection were developed—hereafter referred to as APS-Hs (adsorption–photocatalysis–SERS heterostructures). Particular emphasis was placed on the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs, incorporating an optimized 1.5 wt% Ag loading. Optical and electrochemical tests demonstrated that the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs significantly enhanced charge separation efficiency and reduced charge transfer resistance. Under visible-light irradiation, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs attained a removal efficiency of 98.1 % for methyl orange (MO) within 45 min and sustained an efficiency of 84.0 % after three consecutive cycles. XRD and SEM analyses conducted before and after photocatalytic cycling confirmed the composite's outstanding structural and morphological stability. Notably, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs demonstrated the highest adsorption capacity (21.34 mg/g) among all samples. Zeta potential measurements revealed a surface charge reversal from + 22.35 mV to −10.29 mV, indicative of strong electrostatic interactions with anionic pollutants. Pseudo-second-order (PSO) kinetic modeling (R 2 =0.971) further established physisorption as the dominant mechanism. Radical trapping experiments verified that the enhanced photocatalytic performance originates from the Z-scheme charge transfer pathway. Additionally, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs substrate achieved a SERS enhancement factor of 3.1 × 10 6 and a broadband self-cleaning capability, underscoring its potential for integrated environmental remediation and sensing applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Ku-Ku Hao,Qi-Jin Wang,Sheng-Xiang Wei,Hua-Yang Si,Jing-Wen Hao,Nai-Fu Chen,Nai-Dong Chen,Xiao-Yan Gao,Si-Jie Liao,Shao-Jun Zheng,Man-Man Zhang
A neutral polysaccharide (NDHP-2-1) was isolated from Dendrobium huoshanense C. Z. Tang et S. J. Cheng ( D. huoshanense ). Structure characterization revealed that the weight-average molecular weight of NDHP-2-1 was 20.42 kDa, mainly composed of glucose (95.46 %) and mannose (4.54 %). The backbone of NDHP-2-1 consisted of →6)-α-D-Glc p -(1→, →4)-α-D-Glc p -(1→, and →3,4)-α-D-Glc p -(1→. The T-α-D-Glc p was regarded as the branches attached to the O-4 position of →3,4)-α-D-Glc p -(1 → in the backbone. In vitro experiments indicated that NDHP-2-1 exhibited excellent anti-inflammatory activity. The RAW264.7 cell assay results showed that NDHP-2-1 effectively inhibited the release of pro-inflammatory cytokines, including interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), interleukin-10 (IL-10) from LPS-stimulated macrophages. In general, the newly isolated polysaccharide of NDHP-2-1 exhibited significant anti-inflammatory and immunomodulatory properties, suggesting its potential as an effective natural therapeutic agent for managing inflammatory diseases.
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PubMed
高影响因子
Catalysts
·
2024
·Vol. 14
·期 6
·356
·
IF 3.8
Jing Xu,Songlin Zhu,Huizhi Zhou,Minghao Hou,Kangle Wan,Xueqi Zhang,Wei Yan,Yingcong Wei,Yuanping Chen
Metal–organic frameworks (MOFs) have recently gained attention as a highly promising category of photocatalytic materials, showing great potential in the degradation of organic dyes such as Rhodamine B (RhB). Nonetheless, the mono-metal MOF materials in this application are often constrained by their limited light absorption capabilities and their propensity for recombination with carriers. The combination of different metal-based MOFs to form heterogeneous reactors could present a promising approach for the removal of dyes from water. In this work, a new CAU-17/MIL-100(Fe) Z-scheme heterojunction photocatalyst composed of two MOFs with the same ligands is reported to realize the efficient degradation of dyes in water. The combination of the two MOFs results in a significant enhancement of the surface open sites, optical responsivity range, and charge-separating efficiency through synergistic effects. In addition, the capture experiments conducted on the photocatalytic process have verified that ∙O2−and h+are the primary active species. Consequently, CAU-17/MIL-100(Fe) exhibited excellent photocatalytic activity and stability. The degradation rate of the optimal CAU-17/MIL-100(Fe) photocatalyst was 34.55 times that of CAU-17 and 3.60 times that of MIL-100(Fe). Our work provides a new strategy for exploring the visible-light degradation of RhB in bimetallic MOF composites.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Zhishan Luo,Yuanmeng Fang,Jinhao Chen,Yanyan Wu,Feiran Jia,Liyan Xie,Wei Ren,Minghua Liu,Qing Liu,Jianhui Huang
In this study, a Z-scheme heterostructure was meticulously engineered between zinc tungstate (ZnWO 4 ) nanofibers and polymeric carbon nitride (PCN) nanosheets to augment the photocatalytic degradation of tetracycline (TC) under visible light irradiation. A cohesively integrated PCN/ZnWO 4 photocatalyst structure was synthesized through an in-situ gas-solid reaction. The quantity and spatial distribution of PCN nanosheets were modulated by fine-tuning the gas precursor and reaction parameters. Relative to pristine ZnWO 4 nanofibers and PCN photocatalysts, the distinct three-dimensional PCN/ZnWO 4 heterostructure manifests a notable enhancement in photocatalytic performance, attributed to its plethora of active sites and a Z-scheme configuration that bolsters charge separation efficiency, achieving a tetracycline degradation rate of 95.4% upon exposure to simulated sunlight for 160 minutes. The employment of gas-solid reaction as a design paradigm pioneers a fresh paradigm in the strategic assembly of Z-scheme heterostructured photocatalysts, thereby illuminating a promising pathway for advancements in environmental remediation technologies.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Tengfei Bao,Chenxi Tang,Shuming Li,Ping She,Heng Rao,Jun-sheng Qin
Dual Z-schemed photocatalysts possess superior charge-separation efficiency and powerful redox capabilities, which have attracted significant attention in photocatalytic CO 2 reduction (PCR). However, most of the dual Z-scheme systems are focused on inorganic semiconductors, which remain a challenge to control the selectivity of PCR products. Herein, we designed a cascade dual Z-scheme structured organic/inorganic heterojunction of HCdS@ZnIn 2 S 4 -Cobalt porphyrin (HCdS@ZIS-CoTPPS). HCdS@ZIS-CoTPPS demonstrated excellent PCR activity (CO rate: 93.64 μmol·g −1 ·h −1 ) and adjustable syngas ratio when compared to HCdS, ZIS, CoTPPS, and HCdS/ZIS. Experimental characterizations and density functional theory (DFT) calculations reveal that the superior PCR activity of HCdS@ZIS-CoTPPS is contributed by the broad light absorption range, short charge carrier migration path, low interface contact resistance, and strong redox ability induced by the hollow structured cascade dual Z-scheme heterojunction. This article provides valuable inspiration for the design and preparation of atomistic heterojunctions for solar-driven fuel generation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Yong Yang,Jiajia Wu,Tingting Xiao,Zheng Tang,Jinyou Shen,Haijin Li,Yong Zhou,Zhigang Zou
A unique urchin-like CoZnAl-LDH/RGO/g-C 3 N 4 (LDH/RGO/CN) Z-scheme photocatalyst, which is fabricated by the hydrothermal synthesis of CoZnAl-LDH and the in situ loading of RGO and g-C 3 N 4 , is developed for the photocatalytic conversion of CO 2 . The special spiny external surface and hollow inner cavity endow LDH/RGO/CN with a significantly enhanced light-harvesting capacity. The well-distributed g-C 3 N 4 nanosheets on the CoZnAl-LDH nanoplates, combined with RGO as an electron mediator, constructs an excellent heterosystem with numerous interfaces, efficient charge separation and highly exposed catalytic active sites. The Z-scheme charge-transfer process promotes the oxidizability and reducibility of CoZnAl-LDH and g-C 3 N 4 . Furthermore, the synergistic effect among the components contributes to intense adsorption and chemical activation towards CO 2 , which reduces the reaction barrier for CO 2 photoreduction. As a result, the optimized LDH/RGO/CN exhibits highly efficient and selective photocatalytic CO 2 conversion to CO. The special 3D urchin-like architecture paves a new way for design of photocatalyst with ideal performance.
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DYES AND PIGMENTS
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2016
·
IF 4.055
Yahui Zhang,Huiling Mao,Lingwei Kong,Yong Tian,Zhonglin Tian,Xiangkai Zeng,Junge Zhi,Jianbing Shi,Bin Tong,Yuping Dong
E/Z isomers of hexaphenyl-1,3-butadiene (HPB) derivative containing dialdehyde groups, 4,4’-((1E,3E)-1,2,3,4-tetraphenylbuta-1,3-diene-1,4-diyl)dibenzaldehyde (EE-HPB-CHO), 4,4’-((1Z,3E)-1,2,3,4-tetraphenylbuta-1,3-diene-1,4-diyl)-dibenzaldehyde (EZ-HPB-CHO) and 4,4’-((1Z,3Z)-1,2,3,4-tetra-phenylbuta-1,3-diene-1,4-diyl)dibenzaldehyde (ZZ-HPB-CHO), were firstly synthesized in one-pot and readily separated by silica gel column chromatography . The E/Z isomers containing conjugated diene exhibited remarkable differences in the fields of aggregation-induced emission (AIE) or aggregation-enhancement emission (AEE) behavior, thermostability, and mechanochromic performance. Among them, EE-HPB-CHO with dense molecular packing and strong intermolecular interaction was a better AIEgen while the EZ- and ZZ-isomers exhibited AEE behavior. Moreover, EE-HPB-CHO hardly displayed the mechanochromic performance. EZ-HPB-CHO irreversibly exhibited a blue-shift of 23 nm by grinding treatment, which could not be restored by fuming with organic solvents or heating. In contrast, owing to its twisting conformation and relative loose packing, ZZ-HPB-CHO reversibly displayed a red-shift of 20 nm during multiple repeating cycles of grinding and fuming treatments, showing superior mechanochromic performance.
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Nano Research
·
2015
·Vol. 8
·期 11
·3621-3629
·
IF 7.01
Li Yanrui,Li Leilei,Gong Yunqi,Bai Song,Ju Huanxin,Wang Chengming,Xu Qian,Zhu Junfa,Jiang Jun,Xiong Yujie
A Z-scheme is a promising approach to achieve broad-spectrum photocatalysis. Integration of TiO 2 with another semiconductor with a band gap of ∼1.0 eV would be ideal to harvest both ultraviolet and visible-near infrared light for photocatalysis; however, most narrow-bandgap semiconductors have straddling band structure alignments with TiO 2 , constituting an obstacle to forming the Z-scheme for photocatalytic hydrogen production. In this communication, we demonstrate Ag 2 S as a model system where the energy band upshift of the narrow-bandgap semiconductor that shares an interface with a metal can overcome this limitation. To fabricate the design, we developed a unique approach to synthesize Ag 2 S–Ag–TiO 2 hybrid structures. The obtained ternary hybrid structures exhibited dramatically enhanced performance in photocatalytic hydrogen production under full-spectrum light illumination. The activities were significantly higher than the sum of those of Ag 2 S–Ag–TiO 2 structures under λ < 400 nm and λ > 400 nm irradiation as well as those of their counterparts under any light illumination conditions.
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高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Junfei Liu,Yingbo Dong,Liping Zhang,Wei Liu,Conghui Zhang,Yuanyuan Shi,Hai Lin
Nano molybdenum disulfide (Nano-MoS 2 ) can be as a photocatalyst for antibiotic removal under visible light. However, the low energy of visible light and limited radicals restrict the applications of nano-MoS 2 . In this study, ceria dioxide (CeO 2 ) rich in adsorbed oxygen was introduced into MoS 2 @Z (MoS 2 @Zeolite) to synthesize full-spectrum CeO 2 /MoS 2 @Z photocatalysts (CeO 2 /MoS 2 @Zs). The CeO 2 /MoS 2 @Z-3 (Ce: 1.5 mmol; Mo: 3.5 mmol) shows the best photocatalytic ability (98.32%) for tetracycline within 150 min, which is 18.20% improvement over MoS 2 @Z. The UV–vis diffuse reflection spectra of photocatalysts shows that the ultraviolet absorption ability of CeO 2 /MoS 2 @Z-3 improved when CeO 2 was introduced. The active species trapping experiment and electron paramagnetic resonance (EPR) test prove h + and superoxide radicals (•O 2 − ) are the main active species, and CeO 2 rich in adsorbed oxygen improves the amounts of •O 2 − in photocatalytic process. Moreover, singlet oxygen ( 1 O 2 ), producing by oxygen vacancies of CeO 2 , also plays an important role. The enhanced photocatalytic activity is attributed to full-spectrum (200 nm–800 nm) absorption performance , improved content of •O 2 − , and electron-hole (e − /h + ) pairs separation. After five times recycle, the photodegradation efficiency of CeO 2 /MoS 2 @Z-3 only decreased by 2.59%. Meantime, the proposed three photocatalytic pathways show that tetracycline eventually degraded into small organics (like C 5 H 8 O 3 ), H 2 O and CO 2 by dehydration, demethylation, deamination, dihydroxylation, deamidation, ring-opening reaction and carbonylation . The results show that CeO 2 /MoS 2 @Z-3 may become a high efficiency, stable, and promising photocatalyst for tetracycline wastewater treatment .
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
·
IF 14.229
Quan Huo,Xiaoran Qi,Jianshu Li,Gongquan Liu,Yao Ning,Xubiao Zhang,Boyu Zhang,Yanfei Fu,Suyan Liu
A series of direct Z-scheme α-Fe 2 O 3 /MIL-101(Cr) hybrids were successfully prepared through a facile hydrothermal method in this work. And, the materials were characterized by some technologies including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N 2 adsorption-desorption, photoluminescence (PL) spectroscopy, Ultraviolet-visible (UV–vis) diffuse reflectance spectroscopy (DRS) and electron spin resonance (ESR). The photocatalytic activities of the hybrids were evaluated by degradation of carbamazepine (CBZ) under visible light irradiation. It is found that 100% of CBZ was able to be removed after 180 min irradiation over the optimum α-Fe 2 O 3 (0.3)/MIL-101(Cr) hybrid. The superior activity was engendered from good textural properties and the formation of a direct Z-scheme heterojunction in the hybrid. The decomposition process of CBZ and the formation of intermediate products were analyzed through liquid chromatography-tandem mass spectrometry (LC–MS) and a possible photodegradation pathway of the CBZ was proposed. Also, the possible mechanism for the photodegradation process was provided to illustrate the excellent performance. The work has paved a new way for the application of MOF materials in the design of efficient Z-scheme system for organic pollution degradation in wastewater.
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PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
·
2019
·Vol. 19
·期 1
·80-87
·
IF 2.408
Tingting Wei,Zhanbin Jin,Fengyan Li,Dandan Yan,Lin Xu
In this work, a series of samples of Cd0.5Zn0.5S (ZCS) nanoparticles decorated with porous TaON were successfully prepared as a direct Z-scheme system. The photocatalytic evolution of H2 with a high efficiency was explored using NiS decorated with TaON sensitized ZCS nanocomposites (NiS-TaON/ZCS) and Na2SO3/Na2S as sacrificial reagents. The results showed that 0.5 wt% NiS deposited on the surface of 4 wt% TaON-ZCS nanocomposites could reach the highest photocatalytic H2 evolution rate of 34.8 mmol h−1 g−1 with a maximum quantum yield of about 25.5% under 420 nm monochromatic light. The activity of the TaON-ZCS photocatalyst for photocatalytic H2 evolution is higher than that of either pure ZCS or TaON. This high photocatalytic performance is ascribed firstly to the hierarchical structure of the coupled semiconductor system and secondly to the efficient transfer and separation of photogenerated charge carriers with NiS as a cocatalyst, which could serve as an electron collector.
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