SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Xinbo Wang,Weijun Tian,Bingkun Liu,Bingjie Huo,Xinran Yu,Minghan Li,Ke Yang,Wei Bao
Chlorpyrifos (CPF), as a widely applied organophosphate insecticide, poses a severe threat to ecological safety and human health due to its environmental persistence and potential neurotoxicity. Photocatalysis is considered an effective strategy for removing organic pollutants from aquatic systems. This study constructed a novel BiSbO 4 /Ag 2 S heterojunction photocatalyst to enhance the utilization efficiency of visible light. An exploration was conducted into the impact of various environmental factors on CPF degradation, and a subsequent analysis was performed on the degradation mechanism. Experimental results indicated that a CPF degradation rate of approximately 97% was achieved within 2 h of visible light irradiation. After five consecutive cycles, the degradation efficiency decreased by 12.91%, demonstrating its robust reusability. Superoxide radicals (·O 2 − ) and photogenerated holes (h + ) were identified as the primary reactive species playing a crucial role in the degradation process. Furthermore, the intermediate products formed during CPF degradation were analyzed, potential degradation pathways were proposed, and the toxicity of both CPF and its intermediates was assessed. The construction of a BiSbO 4 /Ag 2 S p-n heterojunction induced a directed internal electric field that effectively regulated the spatial charge transfer and separation, thereby facilitating the efficient production of reactive species for enhanced CPF degradation. This study provided new insights for developing high-efficiency heterojunction materials to remove persistent pesticide pollutants from the environment.
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WATER AIR AND SOIL POLLUTION
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2026
·Vol. 237
·期 12
·730
·
IF 3.5
Feng Xiao-qiang,Hou Jing-wen,Dong Xiao-ning,Li Xiao-fang
The present work constructs a novel Ag₂S/CN composite photocatalyst via in-situ hydrothermal method. The photocatalytic performance of the obtained Ag₂S/CN composite was meticulously evaluated through the degradation of methyl orange (MO) under visible light irradiation. Compared to pure CN and Ag₂S, the Ag₂S/CN composite exhibited significantly enhanced photocatalytic performance. Specifically, the optimal Ag₂S/CN (0.4) sample achieved activities that were 70 and 5 times higher than those of Ag₂S and CN, respectively. This remarkable enhancement can be attributed to the reduced band gap and expanded light absorption range of CN when combined with Ag₂S. Additionally, the surface plasmon resonance (SPR) effect of Ag 0 nanoparticles generated during photodegradation further improves photocatalytic performance by facilitating the separation of photogenerated carriers. Based on photoelectrochemical properties and active species trapping experiments, a plausible mechanism involving hydroxyl radicals (·OH) and superoxide radicals (·O₂⁻) is proposed. The combination of wide-bandgap and narrow-bandgap semiconductors offers a promising strategy for developing efficient photocatalysts for wastewater treatment.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xue Bai,Qin Wang,Mingzhe Tan,Panpan Zhang,Shiyu Sun,Di Wu,Haoran Mei,Guoqiang Shan,Na Wang,Hongxun Hao,Ting Wang,Xin Huang
Solar-driven interfacial evaporation (SIE) technology stands out as a promising approach for seawater desalination, leveraging solar energy efficiently in an environmentally friendly manner. However, the enrichment of organic pollutants on the interfacial evaporator has posed significant obstacles to the sustained implementation of SIE. Herein, a spongy, anti-pollution cellulose acetate membrane consisting of Ag 2 S-doping MXene nanosheets (MT-Ag 2 S/CAM) is proposed for sustainable desalination. The MT-Ag 2 S/CAM exhibited ultralow water vaporization enthalpy of 1.50 kJ g −1 . Meanwhile, the MT-Ag 2 S/CAM, featured by high porosity (75.25 %), excellent light absorption and salt resistance, demonstrated a notable solar-driven evaporation rate of 1.8 kg m −2 h −1 and a remarkable photothermal conversation efficiency of 91.6 % under one sun irradiation. Meanwhile, MT-Ag 2 S/CAM can realize a removal efficiency of 93.3 % for methylene blue, exhibiting outstanding anti-pollution and self-cleaning capabilities as well as long-term stability due to its strong mechanical properties. Finally, a device for sustainable desalination, water purification and clean water collection is designed and implemented in a practical SIE process.
研究领域:
材料科学
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环境科学
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纳米技术
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水处理
·
太阳能
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高影响因子
MICROCHEMICAL JOURNAL
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2026
·
IF 5.1
Tingting Wu,Xuejing Liu,Zhenyuan Xing,Dawei Fan,Zhen Yu,Huan Wang,Qin Wei
In this work, a sensitive and reliable photoelectrochemical (PEC) sensor array integrated on a single electrode was developed for the spatially addressable detection of neuron-specific enolase (NSE), using Bi 2 O 3 /Bi 2 S 3 /Ag 2 S nanodendrites as the substrate electrode material. The Bi 2 O 3 /Bi 2 S 3 structure was grown in situ on an indium tin oxide (ITO) electrode to form large-area nanoarrays, whose uniform distribution helps minimize performance variations across different regions and enables light-addressable detection. Furthermore, Ag 2 S, a narrow-bandgap semiconductor with excellent photoelectric properties, was incorporated into the Bi 2 O 3 /Bi 2 S 3 system to enhance the photoelectrochemical response. The resulting Bi 2 O 3 /Bi 2 S 3 /Ag 2 S-modified ITO electrode was partitioned into five independent regions using insulating stickers, allowing addressable and continuous detection of multiple samples. Since the entire sensor array was fabricated in a single preparation step, inter-regional variability was significantly reduced, enabling the application of a self-calibration strategy to further improve sensitivity and accuracy. Under optimal conditions, the PEC sensor array detected NSE over a concentration range of 0.01–100 ng/mL, with a detection limit of 2.0 pg/mL (S/N = 3). The sensor also exhibited high selectivity, stability, and reproducibility, demonstrating its strong potential for real-sample applications.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Chuanlong Men,Zhenhang Lu,Chenchen Wu,Shengjie Gao,Peiyi Wang,Changhong Liu,Lei Zheng
A porous gelatin-gum/poly(lipoic acid) aerogel functioned as a structural skeleton. • In-situ synthesis achieved high-loading Ag/Ag 2 S with 95.27% encapsulation efficiency. • The composite aerogel enabled efficient synergistic ethylene adsorption and degradation. • Non-contact aerogel platform significantly extended the shelf life of various fruits. Postharvest spoilage of fruits, driven by ethylene-induced ripening and senescence, represents a major challenge to global food systems. Conventional ethylene control technologies, primarily relying on physical adsorption or chemical scavenging, struggle to simultaneously achieve high adsorption capacity and efficient catalytic degradation. Unlike physical blending or impregnation, this study developed a multifunctional aerogel by first constructing a porous, hydrophobic, and UV-barrier aerogel skeleton from a gelatin-gum (GG) complex cross-linked with poly(lipoic acid) (PLA), followed by the photocatalytic in-situ synthesis of uniformly dispersed Ag/Ag 2 S heterojunction nanoparticles, thereby achieving coupled adsorption-photocatalysis synergy at the nanoscale. Structural characterizations confirmed that Ag ions were partially reduced to metallic Ag within the gelatin-gum/poly(lipoic acid) (GG/PLA) skeleton under simulated sunlight, forming a uniformly dispersed Ag/Ag 2 S composite system. Performance evaluation revealed that the aerogel's three-dimensional porous network facilitated efficient ethylene diffusion and enrichment, while the Ag/Ag 2 S heterojunction promoted charge separation, enabling dynamic adsorption-photocatalysis synergy. Notably, at the PLA:Ag molar ratio of 1:1, the composite aerogel synergized its high ethylene adsorption with efficient photocatalytic activity, achieving approximately 95.21% ethylene removal within 24 h. It also demonstrated excellent thermal stability and encapsulation efficiency. Furthermore, applied as a non-contact platform, it effectively maintained the quality and extended the shelf life of both tomatoes and strawberries. This work establishes a design paradigm that couples ethylene adsorption with photocatalytic degradation for intelligent preservation. Download: Download high-res image (172KB) Download: Download full-size image
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Xi Chen,Wenwen Zhang,Lixiang Zhang,Luping Feng,Jiangwei Wen,Jianjing Yang,Chunxian Zhang,Jie Jiang,Hua Wang
A photocatalyst of Ag 2 S/AgI-Bi 2 S 3 /BiOI was synthesized with Z -scheme heterojunctions simply by the S 2− -I − anion exchange route showing broad visible light response and enhanced photogenerated carriers properties. The yielded Ag 2 S/AgI-Bi 2 S 3 /BiOI could feature the reactive active sites of Bi 2 S 3 /BiOI and Ag 2 S/AgI heterojunctions , serving as the photogenerated electron donors and photogenerated electron acceptors , respectively. Ag bridges were generated to ensure the construction of Z -scheme strategy, which further improved the migration direction of charge carriers in nanocomposites. Moreover, the analysis of photoluminescence spectra and electrochemical impedance spectroscopy could testified the functions of heterojunctions, which dramatically achieved the enhanced separation and transferring capacity of photogenerated electron-hole pairs in photocatalyst, respectively. In addition, Ag 2 S/AgI-Bi 2 S 3 /BiOI with large specific surface area facilitated the efficient photocatalytic removal of salicylic acid (SA) (up to 89.2%) under visible light. Favorable photocatalytic production of hydrogen peroxide (H 2 O 2 ) were obtained in pure water driven by the visible light. Besides, by the results of capture experiments, DMPO spin trapping ESR spectra and band structures analysis, the Z -scheme manner of the nanocomposites could promote the reduction ability of photo-generated electrons so as to produce numerous ·O 2 − during the photocatalytic reactions toward the photocatalytic SA removal and H 2 O 2 production.
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TRIBOLOGY LETTERS
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2019
·Vol. 67
·期 4
·1-11
·
IF 2.235
Ma Yanjun,Ye Yinping,Wan Hongqi,Chen Lei,Zhou Huidi,Chen Jianmin
A novel in-situ-synthesis strategy via one-pot thermal decomposition of a single-source precursor was developed to fabricate silver sulfide (Ag 2 S) nanoparticles with monodispersity and narrow size distribution in the polyamide-imide (PAI) nanocomposite coatings. The crystalline phases, size, morphologies, and growth mechanism of the in-situ-synthesized Ag 2 S nanoparticles were characterized by X-ray diffraction, ultrahigh-resolution field emission scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The enhancement effect of such in-situ-synthesized Ag 2 S nanoparticles on the microhardness and tribological behaviors of the PAI nanocomposite coatings were also investigated and compared with mechanically mixed Ag 2 S particles. Results show that the growth of Ag 2 S particles is greatly limited during the in-situ preparation process. The Ag 2 S nanoparticles with small size ranging from 100 to 130 nm are purely formed and exhibit monodispersibility in the PAI nanocomposite coatings. Besides, the appropriate Ag 2 S nanoparticles greatly promote the microhardness and antiwear performance of the PAI nanocomposite coatings, especially when their incorporation content reaches 5.0 wt%. The enhancement effects of these in-situ-synthesized Ag 2 S nanoparticles on microhardness and wear resistance of PAI nanocomposite coatings are superior to that of the mechanically mixed Ag 2 S particles. This is attributed to the improvement of cohesion strength and the load-carrying capacity of the PAI nanocomposite coatings enhanced by in-situ-synthesized Ag 2 S nanoparticles.
研究领域:
材料科学
·
表面工程
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
·
IF 4.6
Shanshan Li,Meixin Li,Zhen Zhao,Mati Ullah Khan,Shuang Liu,Ling Kong,Zhiwei Chen
α-Lactalbumin (α-La), a major allergenic protein in milk, requires ultrasensitive detection to address food safety concerns and mitigate allergic risks. This study introduces a novel label-free photoelectrochemical (PEC) aptamer sensor for α-La detection in dairy products, utilizing a Bi 2 MoO 6 /BiOBr heterojunction substrate sensitized with in-situ synthesized Ag 2 S quantum dots (QDs). The heterojunction platform enhances visible-light absorption and photocurrent generation, while the in-situ Ag 2 S QDs optimizes interfacial charge transfer and surface reactivity. Systematic optimization of experimental parameters such as heterojunction composition, pH, ascorbic acid (AA) concentration, and Ag 2 S QDs conditions enabled precise tuning of the sensor’s performance. The aptamer-functionalized electrode selectively recognized α-La through specific binding interactions, with photocurrent signal attenuation proportional to α-La concentration. The sensor demonstrated a linear response from 0.005 to 50 ng/mL, described by the equation I (μA) = 56.81 − 9.796 lg c , ( R 2 = 0.9934), and achieved an ultralow detection limit of 0.106 pg/mL, surpassing existing methods. The sensor exhibited remarkable stability, reproducibility, and selectivity in complex milk matrices, underscoring its practical utility. This work advances PEC sensing by rationally combining heterojunctions and QDs, providing a robust platform for allergen monitoring in food safety applications.
研究领域:
生物传感
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食品科学
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分析化学
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分子诊断
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纳米材料
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过敏原检测
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电化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Shiva Pandeya,Rui Ding,Qianqian Shang,Xueqing Zhu,Yufei Ma,Xuling Han,Meixing Gui,Narayan Bhattarai,Ziliang Li,Mahesh Kumar Joshi
This study aims to develop a reusable, self-supporting Ag 2 S/TiO 2 photocatalyst for the degradation of tetracycline hydrochloride (TCH) and chemical oxygen demand (COD) removal under visible light irradiation. The flexible Ag 2 S/TiO 2 nanofibrous membranes (NFMs) were prepared by electrospinning and subsequent calcination followed by the deposition of Ag 2 S quantum dots (QDs) on TiO 2 nanofibers by the successive ionic layer adsorption and reaction (SILAR) method. The precise deposition of Ag 2 S QDs preserved the self-standing properties of TiO 2 NFM, and the amount of Ag 2 S QDs was regulated by altering precursor concentration while keeping the SILAR cycles constant. The SEM-EDX, XPS, TEM, and PL measurements confirmed the formation of an Ag 2 S/TiO 2 heterojunction, which lowered the band gap energy to 2.68 eV. This band gap engineering reduced the electron-hole pair recombination and accelerated TCH degradation and COD removal under visible light. The photocatalytic degradation of TCH obeyed pseudo-first-order reaction dynamics, showing a strong influence of the Ag 2 S amount and the pH of the TCH solution on degradation. The Ag 2 S/TiO 2 heterojunction exhibited superior photocatalytic degradation, achieving up to 85.6 % in 90 min, compared to 66.6 % for TiO 2 NFM. The TCH degradation rate significantly increased from 0.012 min⁻¹ for TiO 2 NFM to 0.029 min⁻¹ for Ag 2 S/TiO 2 NFM, marking a 2.4-fold improvement. Furthermore, the optimal TCH degradation occurred at neutral pH 7, while COD removal (94.2 %) from pharmaceutical samples was most effective at acidic pH 5, demonstrating the significant influence of pH on photocatalytic pollutant removal. The as-prepared Ag 2 S/TiO 2 NFM demonstrated strong recyclability, retaining high efficiency after five cycles of use, while maintaining its self-supporting properties, allowing for easy separation after application.
研究领域:
环境科学
·
材料科学
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CRYSTAL RESEARCH AND TECHNOLOGY
·
2014
·Vol. 49
·期 6
·431-434
·
IF 1.164
Chunlin Bao,Guoxing Zhu,Mengqi Shen,Miaomiao Liu,Peng Xiao
A facile microwave-assistant route was developed for the synthesis of hybrid nanocrystals. Colloidal hybrid nanocrystals, Ag 2 S-CdS, were prepared by using Ag 2 S nanocrystals and cadmium diethyldithiocarbamate as raw materials under microwave irradiation. The fast ion conductor, Ag 2 S nanocrystal, catalyzes the growth of CdS nano-building blocks through a quasi solution-solid-solid mechanism. The ultraviolet-visible absorption and photoluminescence spectra of the Ag 2 S-CdS hybrid nanocrystals were investigated. One of the main advantages for this synthesis is the efficiency of dramatically reducing overall processing time. This report provides a new route for the growth of semiconductor hybrid nanocrystals based on Ag 2 S and may be extended to the preparation of other hybrid colloidal nanostructures.
研究领域:
材料科学
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纳米技术
·
化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Chentao Hou,Hualin Liu,Mingyuan Zhang,Liping Wang
The TiO 2 has the problems of low utilization of visible light and high photogenerated carrier recombination rate. The photocatalytic activity of TiO 2 can be significantly improved by introducing F ion and narrow band gap material Ag 2 S. When F ions are present on the {001} surface of TiO 2 , surface F ions drive positively charged holes across the {001} surface, creating a synergistic effect that promotes the separation of electron-hole pairs. During the sample composite process, a certain amount of Ag will be precipitated to form an all-solid Z-type heterojunction structure of Ag 2 S, Ag and F-TiO 2 , which can improve the electron-hole separation efficiency. The results of XPS characterization confirmed the migration of F ion and the precipitation of Ag. The Ag 2 S/F-TiO 2 composite sample was referred to as AT for short, and the corresponding ratio was 1:10,1:20,1:30,1:40, the optimal sample AT 1:20 degraded 95.6% tetracycline hydrochloride within 2 hours. This work simultaneously realizes TiO 2 self-modification (synergistic effect of F ion migration and TiO 2 {001} crystal surface) and composite modification (formation of all-solid Z-type heterojunction), a new idea of studying TiO 2 self-modified cooperative heterostructures is proposed, and the good application potential of AT nanocomposites in photocatalytic water treatment technology is demonstrated.
研究领域:
材料科学
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环境科学
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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.
研究领域:
材料科学
·
能源化学
·
环境科学
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