APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Jiping Shi,Liuqing Hua,Lu Ruan,Xingjian Zhang,Zhengdao Li,Fengyun Su,Xin Li,Haiquan Xie,Yong Zhou
The ZnIn 2 S 4 nanosheets were successfully synthesized on the surface of compacted stainless steel mesh using a simple solvothermal method, and further modified with Cu x O nanoparticles to form ZnIn 2 S 4 /Cu x O heterojunction photocatalyst via a wet chemistry approach. These photocatalysts were then utilized for photothermal catalytic CO 2 reduction under full spectrum solar light. The experimental results demonstrated that the deposition of the photocatalyst on the flexible substrate effectively prevented the aggregation of ZnIn 2 S 4 nanosheets. The incorporation of Cu x O nanoparticles enhanced the specific surface area of the photocatalyst, and created a Z-scheme heterojunction with ZnIn 2 S 4 to improve the utilization efficiency of photogenerated electrons. It was noteworthy that the dark red Cu x O exhibited a full spectrum response and excellent photothermal effect, thereby facilitating carrier migration and reducing CO 2 catalytic reaction barriers. Consequently, the optimized ZnIn 2 S 4 /Cu x O exhibited significantly enhanced CO 2 to CO yield of 1515.8 μmol m -2 h −1 and CH 4 yield of 1579.4 μmol m -2 h −1 , which was about 7.5 and 7.6 times higher than those achieved by pure ZnIn 2 S 4 , respectively. Furthermore, this study provided detailed insights into the mechanism of photocatalytic CO 2 reduction over composite material as well as valuable guidance for designing immobilized photocatalysts with high activity for CO 2 reduction.
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Xinyao Wang,Shaofen Zhao,Wei Shi,Jiangli Sun,Zheming Ni,Shengjie Xia
In this study, WO 3 @NiCr-LDHs Z-scheme heterojunctions have been synthesised for the photodegradation of NOR. A comprehensive investigation was conducted into the effects of the Ni/Cr ratio, catalyst dosage, norfloxacin concentration, temperature and pH of the aqueous environment on the degradation activity of the composites. Furthermore, the stability and reusability of the catalyst after the reaction were discussed. The structural composition and morphological features of the materials were characterised by XRD, SEM and TEM, and the photoelectric properties of the heterojunctions were investigated by photoluminescence spectroscopy and UV–vis diffuse reflectance spectroscopy. The experimental findings demonstrated that a quantity of 15 mg of WO 3 @NiCr-LDHs in conjunction with 50 ml of a 10 mg/L norfloxacin solution in an aqueous environment at a temperature of 20°C and a pH of 7, resulted in 86.01 % of the material being degraded after 120 min of light irradiation. This value was found to be 2.75 and 1.23 times higher than that of WO 3 and LDHs, respectively. Kinetic and thermodynamic analyses indicated that the catalyst amount and temperature were the predominant factors influencing the photodegradation process. The efficient photodegradation is attributable to the built-in electric field produced by the Z-scheme heterojunction, which promotes the separation of photogenerated electron holes, allowing more electrons to be converted into free radicals to work with the holes in the degradation of NOR.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Jiadong Li,Feng Wei,Ziyuan Xiu,Xiaojun Han
InVO 4 possesses great potential in photocatalytic CO 2 conversion. It is still highly desired to develop efficient strategies of photocatalyst fabrication to prevent its attenuated activity caused by the rapid recombination of photogenerated electron-hole. Herein, a direct Z-scheme heterojunction of Bi 2 WO 6 /InVO 4 nanosheets is constructed via two-step hydrothermal synthesis. The Bi 2 WO 6 /InVO 4 composite exhibits a superior photocatalytic performance toward CO 2 reduction into CO and CH 4 under visible light irradiation. The CO evolution rate reaches up to 17.97 μmol g −1 h −1 , while the CH 4 production rate is 1.13 μmol g −1 h −1 , which are higher than those catalyzed by bare InVO 4 and bare Bi 2 WO 6 . Based on the photoelectrochemical results, hydroxyl radical test, Scanning Kelvin Probe (SKP) and electron spin resonance (ESR) investigation, the enhanced activity of CO 2 reduction can be attributed to a Z-scheme electron transfer at the interface to promote spatial charge separation, which effectively preserves the reduction ability of photoelectron on the conduction band of InVO 4 for CO 2 conversion.
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iScience
·
2024
·
IF 4.6
Yinyin Ai,Yukun Li,Ting Li,Ruohan Hou,Qing Wang,Aneela Habib,Guosheng Shao,Peng Zhang
Selecting a suitable photocatalyst to establish the Z-scheme heterojunction which is accompanied by effective photogenerated hole and electron separation, is one of the advantageous strategies for efficient photocatalytic solar energy conversion. Therefore, we prepared a ZnIn 2 Se 4 nanoparticles photocatalyst to build a double Z-scheme heterojunction with mixed-phase TiO 2 nanofibers, boosting photocatalytic solar fuel preparation. The result of X-ray photoelectron spectroscopy confirmed the existence of interfacial chemical bonds and internal electric fields. The interfacial Ti-Se bond is regarded as a channel and the internal electric field serves as the driving force for electron transfer. And the composite photocatalyst exhibits a great hydrogen evolution rate of 0.11 mmol g −1 h −1 . From a forward-working perspective, this work proposes a ZnIn 2 Se 4 nanoparticles photocatalyst for efficient solar fuel conversion, promoting the application of bimetallic selenide photocatalyst in the field of photocatalysis.
研究领域:
材料科学
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能源科学
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光催化技术
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JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Zhansheng Wu,Yongtao Xue,Xiufang He,Yunfeng Li,Xia Yang,Zhilin Wu,Giancarlo Cravotto
The development of a highly efficient and rapid method for the accurate preparation of photocatalysts with novel morphologies is a hot research topic. The different morphologies of BiVO 4 was prepared using surfactants-assisted microwave method, and demonstrated irregular (no surfactant), octahedral (sodium dodecyl benzene sulfonate), olive-like (polyvinylpyrrolidone) and hollow structures (ethylenediaminetetraacetic acid), respectively. The BiVO 4 -CdS were synthesized using the chemical-bath-deposition method with different morphologies of BiVO 4 as the substrates. The hollow structure of BiVO 4 displayed the highest photocatalytic performance. Moreover, the photodegradation rates of the hollow structure BiVO 4 -CdS on tetracycline hydrochloride and ciprofloxacin were about 1.8 and 1.5 times higher than the corresponding BiVO 4 , indicating that the Z-scheme heterojunction can improve the photogenerated electron pairs separation efficiency. Furthermore, the regulation mechanism of morphology and energy-band position, as produced using the surfactants, has also been thoroughly investigated in this work, which provides a novel insight into the efficient and rapid preparation of photocatalysts with special morphology and high performance.
研究领域:
材料科学
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环境科学
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2019
·Vol. 125
·期 1
·1-11
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IF 1.784
Deng Senlin,Yang Zebin,Lv Guojun,Zhu Yongqiang,Li Haichao,Wang Fumin,Zhang Xubin
A novel WO 3 nanosheets (WO 3 NS)/g-C 3 N 4 Nanosheets’ (g-C 3 N 4 NS) nanocomposite photocatalyst was fabricated through a simple calcination process. WO 3 NS was first prepared with the aid of P123 lamellar micelles and g-C 3 N 4 NS was synthesized by two-step calcination process. The nanocomposite photocatalyst was characterized by X-ray powder diffraction, scanning electron microscopy, Fourier transform infrared spectrometry, UV–Vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy, and photoluminescence. The novel nanocomposite photocatalyst demonstrated higher photocatalytic activity for rhodamine B degradation than corresponding g-C 3 N 4 NS. 20 wt% WO 3 NS/g-C 3 N 4 NS showed the highest photocatalytic performance, which was 4.70 times higher than that of pure g-C 3 N 4 NS. The results confirmed that the incorporation of WO 3 NS could definitely accelerate the transfer of photogenerated electrons and effectively promote the separation of electrons and holes, thereby improving the photocatalytic efficiency. The trapping experiments proved that the mechanism of photocatalytic degradation may be rooted in the formation of Z-scheme system.
研究领域:
材料科学
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环境科学
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2019
·
IF 4.784
Zhen Wu,Hong Li,Yongde Wang,Dajian Yang,Hongjun Tan,Yong Zhan,Yong Yang,Yang Luo,Gang Chen
As a discarded byproduct of jujube ( Z . jujuba ), its seeds contain various biological components. Response surface methodology was used to optimize ultrasound-assisted heating extraction conditions of polysaccharides from Z . jujuba cv . Ruoqiangzao seeds (ZJSPs). The optimal parameters were as follows: temperature 83.1 °C, time 100 min, ultrasonic power 140 W, and water-material ratio 33.5 mL/g, allowed a maximum yield of 1.97%. One main fraction (ZJSPs-1) was successfully purified by ion-exchange and gel-permeation chromatography. With a molecular weight of 342 kDa, ZJSPs-1 was composed of arabinose, glucose, xylose, galactose and rhamnose. The presence of pyranose-form sugars as well as both α- and β-configurations was validated by FT-IR and 1 H NMR. TG/DSC indicated that ZJSPs-1 has a favorable thermal stability. XRD suggested that ZJSPs-1 exhibited both crystalline and amorphous portions. ZJSPs-1 was in aggregates of homogenous-dense honeycomb like structures observed by SEM and AFM. ZJSPs-1 possessed antitumor activities against HeLa cells in a dose- and time-dependent manner at 24 and 48 h with IC 50 of 164.6 and 87.1 μg/mL, respectively. Fluorescent microscopic and flow cytometry revealed that ZJSPs-1 inhibited the proliferation of HeLa cells through apoptosis. Z . jujuba seeds are good sources for antitumor polysaccharides in pharmaceutical and food industries.
研究领域:
食品科学
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药学
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生物化学
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Congyang Zou,Yujie Wang,Jie Tian,Ruijie Liu,Minjie Yang
The Ag 2 CO 3 /Cu-BiVO 4 (ACCB) Z -scheme heterojunction photocatalyst was synthesized via a combined hydrothermal and deposition method to activate peroxydisulfate (PDS) for efficient degradation of norfloxacin (NOR). Compared with conventional photocatalysts, the as-prepared Z -scheme heterojunction effectively promotes the separation of photogenerated carriers via a Z-scheme charge transfer pathway. Systematic characterizations including XRD, SEM, and XPS verified the successful preparation of the ACCB Z -scheme heterojunction and the incorporation of Cu, both of which play key roles in enhancing PDS activation and NOR degradation. Photocatalytic degradation experiments demonstrated that ACCB-100 exhibited optimal performance among the ACCB catalyst series under visible light irradiation, achieving a NOR degradation efficiency of 95.68% within 120 min, which was significantly superior to those of the pristine single-component materials. Further cyclic degradation experiments showed that ACCB-100 still retained a degradation efficiency of 88.62% after five cycles, indicating its excellent photocatalytic stability. Simultaneously, radical trapping experiments and ESR analyses demonstrated that h + , ·O 2 − , ·OH and SO 4 ·- were the active species involved in the photocatalytic degradation of NOR.
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Royal Society Open Science
·
2025
·Vol. 12
·期 11
·
IF 2.9
Omar Mirna,Omar Sarah,El-Subruiti Gehan M.,Attia Nour F.,Eltaweil Abdelazeem
With growing concerns over water pollution and depletion of freshwater resources, finding sustainable and cost-effective solutions for water treatment is crucial. This study introduces a novel MIL-53(Fe)/Mn-doped SrTiO3 (MIL-53(Fe)/Mn-STO) direct Z-scheme photocatalyst, designed to efficiently degrade organic contaminants in water. Specifically, the photocatalytic degradation of o-nitrophenol (ONP) was investigated under an Xe lamp. The MIL-53(Fe)/Mn-STO photocatalyst demonstrated a maximum removal efficiency of 97.75% within 90 min, with a rate constant (k) of 0.0374 min−1, outperforming the individual MIL-53(Fe) and Mn-STO photocatalysts. A comprehensive analysis of the material’s properties was conducted using Fourier transform Infrared spectroscopy, energy dispersive X-ray spectroscopy, scanning electron microscopy, diffuse reflectance spectroscopy and photoluminescence techniques, and the photocatalytic activity was evaluated under various conditions, including variations in pH, ONP concentration, catalyst dosage and the presence of inorganic anions. The improved photocatalytic activity of the MIL-53(Fe)/Mn-STO system can be ascribed to the synergistic interaction between its two components, which also contributed to its excellent recyclability over five cycles. These findings demonstrate that MIL-53(Fe)/Mn-STO is a highly effective and sustainable photocatalyst with a strong potential for wastewater treatment applications.
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APPLIED CATALYSIS A-GENERAL
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2026
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IF 4.8
Huimin Luo,Jinming Yan,Deyun Xu,Jia Guo,Mengjie Fan,Longtian Kang,Qingfu Sun
P/N-type Z-scheme heterojunction of Co-PDI/Cu-CuTCPP is prepared by a simple way. • Multifunctional photocatalytic activity of is achieved for POE, PHE and CO 2 RR. • Catalytic activities for POE and CO 2 RR increase by ~3 and ~12 times, respectively. • The overall CO 2 RR in the aqueous phase can be achieved to yield O 2 , CO and CH 4 . • It is found that Co-O-Cu linkage exists and has important role in photocatalysis. Developing a multifunctional system for photocatalytic water splitting (PWS) and carbon dioxide reduction reaction (CO 2 RR) is a promising approach to achieve the green carbon cycling. Here, the p/n-type Z-scheme heterojunction (Co-PDI/Cu-CuTCPP) between cobalt perylene diimide nanorods (Co-PDI) and copper porphyrin metal-organic framework nanosheets (Cu-CuTCPP NSs) is constructed via a cetyltrimethylammonium bromide (CTAB)-assisted physical method. Systematical characterizations prove the existence of Co–O–Cu linkage, π-π interaction, and electrostatic forces between Co-PDI and Cu-CuTCPP. The effect of Co-PDI/Cu-CuTCPP ratio on the optical, photoelectric and electrical properties, as well as multifunctional photocatalytic activity is investigated and analyzed. Under visible light irradiation (λ > 420 nm), the Co-PDI/Cu-CuTCPP composites exhibit the photocatalytic activities of water splitting to H 2 and O 2 , as well as CO 2 RR to CO and CH 4 , respectively. After optimizing photocatalytic system, the oxygen evolution rate of 18.7 mmol·g −1 ·h −1 is reached, which is a 4.4-fold compared that of pure Co-PDI. The photogenerated electron conversion efficiency during CO 2 RR is 12.9-fold higher in Co-PDI/Cu-CuTCPP than in Cu-CuTCPP. Meanwhile, the overall CO 2 RR in the aqueous phase can be achieved without H 2 production. Mechanism studies reveal the photoelectrical conversion process, and confirm the synergistic role between Co-PDI and Cu-CuTCPP. Download: Download high-res image (310KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120629
·
IF 7.2
Lijun Hu,Qian Huang,Meng Li,Ju Zhang,Qi Xue,Jiayi Wang,Caiwen Li
The parasitic dinoflagellate in Hematodinium genus causes significant economic losses to fishery and aquaculture of multiple valuable marine crustaceans. It is practically needed to develop an effective and environmentally compatible method to control the Hematodinium epidemics in mariculture. In the present study, a novel Z-scheme composite photocatalyst was synthesized successfully using Zinc oxide (ZnO) and Copper Metal-Organic Framework (Cu-MOF), The N-Cu-MOF photocatalyst showed superior charge carrier separation efficiency compared to Cu-MOF, and exhibited significantly improved visible-light absorption in contrast to the activation of ZnO only under UV light. The ZnO/N-Cu-MOF photocatalyst demonstrated excellent inactivation of Hematodinium perezi microspores, with half maximal inhibitory concentration (IC 50 ) values of 3.12 mg/L at 1 h and 1.01 mg/L at 2 h. The inactivation effects involved the generation of large amounts of intracellular reactive oxygen species (ROS), which induced oxidative stress and disrupted the membrane and flagella structural integrity of the dinospores, ultimately leading to cell necrosis induced by oxidative damage. The present study provided a new insight and approach for seawater treatment of mariculture facilities, thereby to prevent and control spreading of Hematodinium epidemics in commercially valuable crustaceans.
研究领域:
环境科学
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光催化
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水产病害防控
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海洋微生物学
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材料科学
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zhihong Liu,Jiale Liu,Jin Wang,Ping Lu,Shishun Xu,Yi Lu,Xiaofei Li,Qiaowen Zhang,Guocan Jiang,Zhengquan Li
The urgent need for clean energy has driven extensive research into efficient photocatalytic systems for CO 2 reduction. Lead-free Cs 3 Bi 2 Br 9 perovskites are particularly promising in this context, yet the photocatalytic performance of single-component Cs 3 Bi 2 Br 9 is often hindered by its narrow absorption in visible-light range. Here, we present a visible-to-near-infrared (vis-to-NIR) responsive Cs 3 Bi 2 Br 9 /Bi 19 Br 3 S 27 Z -scheme heterojunction photocatalyst, achieved by creating a high-quality interface upon in-situ growth. This heterojunction design markedly boosts CO₂-to-methane conversion, achieving electron consumption rates that are 70 and 124 times higher than those of pristine Cs 3 Bi 2 Br 9 and Bi 19 Br 3 S 27 , respectively. Mechanistic studies indicate that the formation of a strong built-in electric field at the interface facilitates efficient charge separation and transfer, significantly boosting photocatalytic performance. Notably, the photocatalytic performance of Cs 3 Bi 2 Br 9 /Bi 19 Br 3 S 27 heterojunction surpasses that of most lead-free halide perovskite photocatalysts. Our findings offer a new paradigm for interface engineering in photocatalysis and advance the development of vis-to-NIR responsive perovskites for sustainable energy conversion.
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