ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 7
·19450-19465
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IF 5.19
Chen Haodong,Shu Qing
In this study, a series of ternary composite photocatalysts ZnO/g-C 3 N 4 /AgCl( x ) ( x is the amount of AgCl added, x =0.05, 0.1, 0.15 g) were synthesized, and various characterization methods were used to analyze the morphology, structural, and photochemical properties of the above samples. The photocatalytic activity of the obtained samples was evaluated by degrading rhodamine B (RhB) and acid orange (AOII) under xenon lamp irradiation. The results show that the degradation rate of ZnO/g-C 3 N 4 /AgCl (0.1 g) is 99% within 60 min, which is much higher than the 38% degradation rate of g-C 3 N 4 . After five cycles, the degradation efficiency of RhB and AOII by ZnO/g-C 3 N 4 /AgCl (0.1 g) were still 85% and 94%, respectively. In addition to colored dyes, the photocatalytic degradation of colorless tetracycline hydrochloride (TCH) compounds was also investigated to understand the effect of photosensitization on the degradation process. Based on the electronic structure analysis of the DFT calculations, a staggered heterojunction structure was found between g-C 3 N 4 , ZnO, and AgCl. The enhanced photocatalytic activity of the ternary composite is mainly attributed to the efficient separation of charge carriers through the synergistic removal of photogenerated electrons in g-C 3 N 4 by ZnO and AgCl. Radical trapping experiments confirmed that •O 2 − and h + were the main active species in the reaction system. As a visible light-responsive catalyst, ZnO/g-C 3 N 4 /AgCl can be effectively applied to the degradation of organic dye pollutants and has broad application prospects.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 24
·8063
·
IF 4.6
Chunyong Zhang,Haoyu Wang,Li Shu,Zhe Li,Jirong Bai,Yinpin Wen,Lin Zhu,Yin Geng,Hengfei Qin
PEDOT-Ag/AgCl is a highly promising material with dual functions of hydrogen evolution reaction (HER) and supercapacitors. In this study, a simple low-temperature stirring and light irradiation method was used to synthesize PEDOT-Ag/AgCl on the surface. Then, PEDOT-Ag/AgCl was analyzed using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. PEDOT-Ag/AgCl reacted in 1 M KOH alkaline electrolyte with an overpotential of 157 mV at 20 mA·cm−2and a Tafel slope of 66.95 mv·dec−1. Owing to the synergistic effect of PEDOT and Ag/AgCl, this material had a small resistance (1.7 Ω) and a large specific capacitance (978 F·g−1at current density of 0.5 A·g−1). The synthesis method can prepare nanostructured PEDOT with uniformly-distributed Ag nanoparticles and rod-shaped AgCl on the surface, which can be used as both HER electrocatalysts and supercapacitor electrodes.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 11
·1868-1876
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IF 2.909
Lu Yuxiang,Huang Lvtao,Mao Jikai,Zhou Jianguang
The effect of indices of crystal facets on the properties of nanomaterials has attracted widespread interest. However, the synthesis of silver chloride (AgCl) nanocrystals with high-index facets is still a difficult problem. By precisely controlling iodine ions (I − ), AgCl nanocrystals with 24 high-index {433} facets were successfully synthesized. We discussed I − selective landing on specific positions of crystal and its role in controlling the formation of high-index facets. In addition, we also utilized the AgCl crystals to catalyze the degradation of hexavalent chromium, an environmental pollutant. {433}-bounded AgCl crystals exhibits twice catalytic efficiency for K 2 Cr 2 O 7 degradation compare with {311}-bounded. Moreover, its catalytic efficiency is much higher than that of AgCl nanocrystals exposed low-index facets. Graphical abstract Description the formation of AgCl crystal with {433} facets.
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
Nanoscale
·
2015
·Vol. 7
·期 27
·11591-11601
·
IF 7.394
Haibin Zhang,Yonggang Lu,Hong Liu,Jingzhong Fang
AgCl semiconductor nanocrystals (NCs) with trapezohedral (TPH) and concave hexoctahedral (HOH) structures have been successfully synthesized for the first time in high yield by a direct one-pot solvothermal method. The as-prepared TPH, concave HOH AgCl NCs with unconventional polyhedral shapes and smooth surfaces were enclosed by 24 high-index {311} facets and 48 high-index {15 5 2} facets, respectively. A specific ionic liquid poly(diallyldimethylammonium) chloride (PDDA) acted as both a Cl− ion precursor and a morphology-controlled stabilizer, which was indispensable for the formation of these high-index faceted AgCl polyhedra and the derived uniform octahedral AgCl in an appropriate concentration of hot AgNO3 and ethylene glycol (EG) solution. With high-index facets exposed, both TPH and concave HOH AgCl NCs exhibit much higher photocatalytic activity than octahedral AgCl NCs that have mainly {111} faces exposed, with lower surface areas and surface energies, for the degradation of organics under sunlight. It is expected that the use of polyhedral AgCl NCs with high-index facets is an effective approach for the design of alternative semiconductor photocatalysts with a high performance, which may find potential applications such as in photochromics and environmental management.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Meng Du,Shiyu Zhang,Zipeng Xing,Zhenzi Li,Peng Chen,Kai Pan,Wei Zhou
The dual plasmons (Bi, Ag)-based direct Z-scheme Bi 3 O 4 Cl/AgCl heterojunction ultrathin nanosheets are successfully synthesized by hydrothermal combined with solid-state reduction strategy. The plasmons Ag and Bi are formed during solid-state reduction process, which are firmly anchored on surface of Bi 3 O 4 Cl and AgCl, respectively, and favors the charge transfer obviously. Experiments results confirm the formation of heterojunction ultrathin nanosheets with the main size of 200∼300 nm and the thickness of <10 nm. The obtained dual plasmons-based direct Z-scheme Bi 3 O 4 Cl/AgCl heterojunction ultrathin nanosheets with the band gap of ∼1.66 eV exhibit excellent photothermal performance. 98.3% of Cr (VI) can be photocatalytic reduced and TOC removal rate of ceftriatone sodium reached 98.9% within 210 min, respectively. Due to the surface plasma resonance, the catalyst temperature increases obviously, indicating the enhanced photothermal performance, which is favorable for promoting the photocatalytic performance. Moreover, the cyclic stability experiment also proves the high stability and has advantages in practical applications. The excellent property can be ascribed to the direct Z-scheme accelerating charge transfer and prolonging the lifetimes, the dual plasmons enhancing photothermal performance and the spatial separation of photogenerated charge carriers.
研究领域:
材料科学
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环境科学
·
化学
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DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Qiyue Zhang,Aori Qileng,Jiale Li,Yiran Cao,Weipeng Liu,Yingju Liu
Organic dyes can produce harmful effects on the water environment, such as affecting the growth of aquatic organisms, reducing the transparency of water bodies, and causing eutrophication of water bodies, so it is necessary to mitigate the hazards of organic dyes. In this study, a metal–organic framework [NH2-MIL-101(Fe)] was synthesized by the solvothermal method as a carrier for the in situ uniform deposition of AgCl nanoparticles on its surface, which was successfully used for both adsorption and degradation of Congo red. Adsorption results showed that the adsorption kinetics conformed to the proposed secondary adsorption kinetics equation with a maximum adsorption capacity of 248.4 mg·g–1. Furthermore, the degradation results indicated that with the aid of sodium borohydride as a reducing agent, the degradation of Congo red followed pseudo-first-order kinetics with a degradation rate of 0.077 min–1, and the complete degradation of Congo red was finished within 18 min. Therefore, AgCl/NH2-MIL-101(Fe) may find a potential application in the removal of dyes from wastewater.
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
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Rongsheng Ning,Heliang Pang,Zhongsen Yan,Zhenyu Lu,Qiankun Wang,Zengling Wu,Wenxin Dai,Lingshan Liu,Zhongsheng Li,Gongduan Fan,Xianzhi Fu
The development of high efficient photocatalysts for antibiotics contamination in water remains a severe challenge. In this study, a novel step-scheme (S-scheme) photocatalytic heterojunction nanocomposites were fabricated from integrating AgCl nanoparticles on the MIL-100(Fe) octahedron surface through facile multi-stage stirring strategy. The S-scheme heterojunction structure in AgCl/MIL-100(Fe) (AM) nanocomposite provided a more rational utilization of electrons (e - ) and holes (h + ), accelerated the carrier transport at the junction interface, and enhanced the overall photocatalytic performance of nanomaterials . The visible-light-driven photocatalysts were used to degrade sulfamethazine (SMZ) which attained a high removal efficiency (99.9%). The reaction mechanisms of SMZ degradation in the AM photocatalytic system were explored by electron spin resonance (ESR) and active species capture experiments, which superoxide radical (•O 2 - ), hydroxyl radical (•OH), and h + performed as major roles. More importantly, the SMZ degradation pathway and toxicity assessment were proposed. There were four main pathways of SMZ degradation, including the processes of oxidation , hydroxylation, denitrification, and desulfonation. The toxicity of the final products in each pathway was lower than that of the parent according to the toxicity evaluation results. Therefore, this work might provide new insights into the environmentally-friendly photocatalytic processes of S-scheme AM nanocomposites for the efficient degradation of antibiotics pollutants.
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
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Xiaoxuan Li,Siman Fang,Lei Ge,Changcun Han,Ping Qiu,Weilong Liu
A novel plasmonic photocatalysts of Ag/AgCl-Bi 2 MoO 6 was successfully synthesized via a simple and mild wet-chemical process. The physical and photophysical properties of the as-prepared Ag/AgCl-Bi 2 MoO 6 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Ultraviolet–visible diffuse reflection spectroscopy (DRS), electron spin resonance (ESR), photoluminescence emission spectra (PL) and surface photovoltage spectroscopy (SPV). The interaction between Ag/AgCl and Bi 2 MoO 6 has been investigated by X-ray photoelectron spectroscopy (XPS) analysis, and which is facile to the electron transfer between Ag/AgCl and Bi 2 MoO 6 and result in the enhancing photocatalytic activity of Ag/AgCl-Bi 2 MoO 6 composite. The photocatalytic experiments indicate that the Ag/AgCl species can efficiently promote the separation efficiency of photo-generated charge carriers in Bi 2 MoO 6 , and consequently improve the RhB photodegradation activity. The 20 wt% Ag/AgCl-Bi 2 MoO 6 sample shows the highest photocatalytic activity, the degradation constant of 20 wt% Ag/AgCl-Bi 2 MoO 6 was as high as 4 times to that of pure Bi 2 MoO 6 . A possible catalytic mechanism for Ag/AgCl-Bi 2 MoO 6 is proposed, which can be attributed to the surface plasmon resonance (SPR) effect from Ag/AgCl species.
研究领域:
材料科学
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光催化
·
纳米材料
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环境化学
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半导体物理
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表面科学
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DOI
高影响因子
Materials
·
2015
·Vol. 8
·期 5
·2043-2053
·
IF 2.651
Xiyun Zhao,Jie Zhang,Binsong Wang,Amir Zada,Muhammad Humayun
Photocatalytic removal of organic pollution such as waste colored dyes was a promising technique for environment technique. However, effective photocatalysts were needed to enhance the photocatalytic efficiency. Ag/AgCl was regarded as high performance catalyst for photocatalytic degradation. Ag/AgCl nanoparticles were biochemically prepared with metabolin of living fungi which was used as reductant and characterized by X-Ray diffraction (XRD), UV-visible spectroscopy and transmission electron microscopy (TEM). The Ag/AgCl nanoparticle composites showed spherical aggregation shape with an average size of about 3–5 nm which is well inside the quantum regime. The UV-visible study showed that Ag/AgCl nanoparticles had strong visible light absorption and exhibited excellent visible-light-driven photocatalytic performance. Photocatalytic results indicated that the obtained Ag/AgCl nanoparticles were suitable for photocatalytic removal of RhB dye under visible light irradiation. The excellent photocatalytic activities could be attributed to the quantum size nanoparticles and the Plasmon resonance of Ag/AgCl composites.
研究领域:
环境科学
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生物化学
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Xiao Ling,Xiaofeng Guo,Ke Wang,Ziming Huang,Zhixuan Mo,Huibo Qin,Linhai Duan,Xiuhong Meng,Hui Wang
Photocatalytic degradation of organic pollutants in water represents a highly promising strategy for environmental remediation. However, conventional photocatalysts are hampered by their inefficient employment of visible light energy and the propensity of photoinduced charge carriers to undergo recombination. To overcome these limitations, Z-scheme photocatalyst UiO-66-NO 2 @ Ag/AgCl (UiO@Ag-X, where X denotes the Ag/AgCl content) composites were designed and prepared. The crystal structure, morphology, photocatalytic performance, light absorption capacity, and carrier separation efficiency were systematically tested. Optical and electrochemical measurements revealed that the incorporation of Ag/AgCl enhanced the segregation and transfer efficiency of charge, which is crucial for boosting photocatalytic activity. These improvements directly contributed to the enhanced degradation efficiency observed in subsequent experiments. In experiments using methyl violet (MV) as the model pollutant, the photocatalytic degradation performance of UiO@Ag-X samples was evaluated. Among these samples, UiO@Ag-50 achieved a remarkable degradation efficiency under light irradiation. Moreover, the corresponding kinetic rate constant was about 0.04724 min -1 , which was higher than that of UiO-66-NO 2 . Quenching experiments were employed to investigate the mechanisms related to photocatalysis. The results show that hydroxyl radicals play an important role in the degradation of MV.
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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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Wenwen Fu,Wentong Yang,Chen Qian,Yaqin Fu,Yaofeng Zhu
Heterointerfaces in microwave absorption materials can induce dielectric polarization relaxation for superior microwave absorption capacity. Nevertheless, the construction of favorable hierarchical structures in dielectric heterogeneous materials remains a considerable challenge. Herein, Ag/AgCl heterojunction (HAg) nanoparticles are successfully decorated on polyaniline (PANI)/graphene oxide (GO) sheets through simple one-pot interfacial polymerization. The synthesized HAg/PANI/GO hybrid exhibits superior microwave absorption performance due to the multi-heterogeneous and hierarchical structures, which provides numerous interface polarizations, dipolar relaxations, and improved impedance matching. The minimum reflection loss of the optimum HAg/PANI/GO hybrid reaches −61.14 dB at 11.32 GHz with an effective absorption bandwidth of 4.77 GHz in the range from 9.70 to 14.47 GHz. This work provides ideas for producing multi-heterogeneous and hierarchical structures to reach a high microwave absorption performance.
研究领域:
材料科学
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纳米技术
·
电磁材料
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Gongduan Fan,Zhong Chen,Zhongsen Yan,Banghao Du,Heliang Pang,Dingsheng Tang,Jing Luo,Jiuyang Lin
A novel plasmonic Ag/AgCl@LaFeO 3 (ALFO) photocatalyst was successfully synthesized by a simple in-situ synthesis method with enhanced photocatalytic activity under visible light for harmful algal blooms (HABs) control. The structure, morphology, chemical states, optical and electrochemical properties of the photocatalyst were systematically investigated using a series of characterization methods. Compared with pure LaFeO 3 and Ag/AgCl, ALFO-20% owned a higher light absorption capacity and lower electron–hole recombined rate. Therefore, ALFO-20% had higher photocatalytic activity with a near 100% removal rate of chlorophyll a within 150 min, whose kinetic constant was 15.36 and 9.61 times faster than those of LaFeO 3 and Ag/AgCl. In addition, the changes of zeta potential , cell membrane permeability, cell morphology, organic matter, total soluble protein, photosynthetic system and antioxidant enzyme system in Microcystis aeruginosa ( M. aeruginosa ) were studied to explore the mechanism of M. aeruginosa photocatalytic inactivation. The results showed that ALFO-20% could change the permeability and morphology of the algae cell membrane, as well as destroy the photosynthesis system and antioxidant system of M. aeruginosa . What’s more, ALFO could further degrade the organic matters flowed out after algae rupture and die, reducing the secondary pollution and avoiding the recurrence of HABs. Finally, the species of reactive oxygen species (ROS) (mainly •O 2 - and •OH) produced by ALFO were determined through quenching experiments, and a possible photocatalytic mechanism was proposed. Overall, ALFO can efficiently remove the harmful algae under the visible light, providing a promising method for controlling HABs.
研究领域:
环境科学
·
光催化技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）