JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yunpeng Gong,Xiaoyan Xiong,Lijiu Cao,Yue Hu,Qiao Qin,Jiamin Gan,Yufang Chen,Tao Jin
Introducing defects is an effective strategy to improve the sensitivity of sulfide semiconductor sensors. In this study, ZnO obtained by calcining ZIF-8 was used as the core, and ZnIn 2 S 4 flakes were grown in situ on the outer surface of ZnO to construct a flower-cluster ZnO@ZnIn 2 S 4 composite material with an internal rich S-vacancy. The prepared ZnO@ZnIn 2 S 4 has a well-contacted ІІ-type heterojunction . Compared with ZnIn 2 S 4 , the response value of ZnO@ZnIn 2 S 4 to triethylamine gas was increased by 4.9 times, and the response recovery time was shortened from 932 s to 100 s. At a working temperature of 180°C, ZnO@ZnIn 2 S 4 exhibits a response to triethylamine that is 47.2 times higher than the response to other gases, demonstrating its specific selective response to triethylamine molecules. ZnO@ZnIn 2 S 4 can maintain a stable response to triethylamine molecules for a long time in a complex humidity environment. The selective mechanism of material selection was analyzed from the perspectives of molecular attack, molecular polarity differences, and spatial size matching. They are using calcined MOF materials as the core has excellent potential for improving the gas-sensitive response performance of materials. The explanation of the specific selectivity mechanism is positively inspiring for the construction and performance optimization of high-performance triethylamine response materials.
研究领域:
材料科学
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化学传感器
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纳米材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yining Zhang,Mengyang Xu,Weiqiang Zhou,Xianghai Song,Xin Liu,Jisheng Zhang,Songtao Chen,Pengwei Huo
Step-scheme (S-scheme) heterojunctions can efficiently promote the separation of photogenerated carriers while maintaining the strong oxidation/reduction ability of photocatalysts; thus, research attention on S-scheme heterojunctions is increasing year by year. In this study, the S-scheme ZnO@ZnIn 2 S 4 (ZnO@ZIS) heterojunction was prepared successfully. Then, electron spin resonance (ESR) characterization was applied to prove the successful construction of the S-scheme heterojunction. Photoluminescence (PL), time-resolved photoluminescence (TRPL), and photoelectrochemical experiments have demonstrated efficient interfacial charge transport in ZnO@ZIS. Finally, the mechanism of CO 2 activation and electron transport was investigated by in situ Fourier transform infrared spectroscopy (FT-IR) and discrete Fourier transform (DFT) calculation analysis. The 40-ZnO@ZIS composite showed the best activity under light, and its CO and CH 4 yields reached 39.76 and 3.92 μmol∙g −1 ∙h −1 , respectively. This study provides a solution for optimizing the photocatalytic reduction activity of semiconductor photocatalysts by constructing S-scheme heterojunction materials to improve the CO 2 reduction capacity.
研究领域:
材料科学
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环境科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Environmental Science
·
2023
·
IF 4.6
Gan Xinhong,Song Yang,Liu Guoqiang,Zhang Huijuan,Yang Jianhua
We hydrothermally synthesized a flower-shaped ZnO/ZnIn2S4(ZnO/ZIS) Z-scheme heterojunction, which could decompose antibiotics efficiently. Meanwhile, the photocatalysts degradation of sulfamethoxazole (SMX) as the representative pollutant by ZnO/ZIS were studied deeply. When irradiated by a xenon lamp (500 W), ZnO/ZIS (0.20 g/L) degraded SMX (2.5 mg/L) in 6.5 h with an efficiency of 74.9%. The O2− and h+ played key roles in the visible light-assisted decomposition of SMX by ZnO/ZIS, while the role of OH was supplementary. Additionally, we investigated the mechanism of the generation of active species environmentally persistent free radicals (PFRs) within the SMX degradation using ZnO/ZIS by performing computations and experimental analyses based on density functional theory. Besides, PFRs (predominantly oxygen-centered) generated during the visible light-assisted SMX degradation by ZnO/ZIS had a concentration of 1011 spin/mm3. The generation of PFRs involves two major events, i.e., chemical adsorption and electron transfer. To adsorb the precursor F9a on ZnO, the energy required was −2.03 eV, and the electrons were transferred to the ZnO/ZnIn2S4 heterojunction from the precursor F9a. The PFRs only had minor negative impacts on the SMX degradation through ZnO/ZIS.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
·
2022
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IF 8.943
Jianhua Yang,Lu Fang,Zhengkui Li,Guanhua Meng,Yong Jia,Yongbin Jiang,Jianjun Lian,Xinhong Gan
At present, the researches on photocatalysis were mainly focused on the design, improvement and development of catalysts, and less attention was paid to the existing characteristics of environmentally persistent free radicals (EPFRs) during the process of photocatalytic oxidation. In this study, A flower-like Z-type heterojunction ZnO/ZnIn 2 S 4 (ZnO/ZIS) and typical antibiotic ceftriaxone sodium (CS) were taken as study objects, concentrating on the generation characteristics of EPFRs during the degradation of CS by ZnO/ZIS, and clarifying the degradation mechanism of CS in which EPFRs participated. The results showed that the degradation efficiency of 10 mg/L CS by 0.40 g/L ZnO/ZIS reached 85.3% in 150 min under the irradiation of 500 W xenon lamp . It was clear that ·O 2 − and h + play major roles in CS degradation by ZnO/ZIS under visible light, and ·OH plays an auxiliary role. Furthermore, the formation mechanism of EPFRs during photocatalytic degradation processes of CS by ZnO/ZIS were first investigated thoroughly via experimental analysis and density functional theory (DFT) calculations. The concentration level of EPFRs centered on oxygen atoms is 10 11 spin/mm 3 , which were generated in the process of degradation of CS by ZnO/ZIS under visible light. The production of EPFRs chiefly includes two procedures: chemical adsorption and transfer of electrons. The adsorption energy of precursor P8 on ZnIn 2 S 4 side is −1.91 eV, the electrons transferred from precursor P8 and P11 to ZnO/ZnIn 2 S 4 heterojunction. Surprisingly, EPFRs have little negative effects on the degradation process of CS by ZnO/ZIS. The study was not only a key field in the development of photocatalysis technology , but also a new way to study the removal mechanism of antibiotics.
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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产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
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2022
·Vol. 12
·期 10
·818
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IF 5.743
Jiali Huang,Xu Li,Mingzhen Xiu,Kang Huang,Kang Cui,Jing Zhang,Shenguang Ge,Shiji Hao,Jinghua Yu,Yizhong Huang
Nowadays, developing a cost-effective, easy-to-operate, and efficient signal amplification platform is of important to microfluidic paper-based analytical devices (μPAD) for end-use markets of point-of-care (POC) assay applications. Herein, an ultrasensitive, paper-based photoelectrochemical (PEC) bioassay platform is constructed by in situ grown ZnO/ZnIn2S4heterojunctions onto paper fibers, which acted as photoactive signal amplification probes for enhancing the sensitivity of antibodies-based diagnostic assays, for the sensitive detection of alpha-fetoprotein (AFP) targets. The crystalline flake-like ZnIn2S4composited with hexagonal nanorods (NRs) morphology of ZnO is an in situ grown, at the first time, onto cellulose fibers surface supported with Au nanoparticle (Au NP) modification to improve conductivity of the device working zone. The obtained composites on paper fibers are implemented as a flexible paper-based photoelectrode to realize remarkable performance of the fabricatedμPAD, resulting from the enhanced PEC activity of heterojunctions with effective electron-hole pair separation for accelerating photoelectric conversion efficiency of the sensing process under light irradiation. Once the target AFP was introduced into the biosensing interface assistant, with a specific recognition interaction of AFP antibody, a drastically photocurrent response was generated, in view of the apparent steric effects. With the concentration increase of AFP targets, more immune conjugates could be confined onto the biosensing interface, eventually leading to the quantitative decrease of photocurrent intensity. Combined with an ingenious origami design and permitting the hydrophobic/hydrophilic conversion procedure in the bioassay process, the ultrasensitive PEC detection of AFP targets was realized. Under the optimized conditions, the level of AFP could be sensitively tracked by the preparedμPAD with a liner range from 0.1 to 100 ng mL−1and limit of detection of 0.03 ng mL−1. This work provides a great potential application for highly selective and sensitive POC testing of AFP, and finally, developments for clinical disease diagnosis.Keywords:μPAD;photoelectrochemical;alpha-fetoprotein;point-of-care assay;immunosensing
研究领域:
生物医学工程
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分析化学
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即时诊断
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Nan Qing Yang,Jin Li
To improve the photocatalytic degradation efficiency of ZnO and ZnIn 2 S 4 for organic pollutants, ZnO/ZnIn 2 S 4 0D/2D composite heterojunction materials were constructed using 0D ZnO nanoparticles and 2D layered ZnIn 2 S 4 . ZnO nanoparticles were fixed on the surface of 2D ZnIn 2 S 4 to form type-II heterojunctions, which provided abundant active sites and presented low ionization energy, good visible light adsorption, and low electron–hole recombination rates. The fabricated ZnO/ZnIn 2 S 4 composites presented an excellent performance in photocatalytic experiments. The photocatalytic first-order kinetic coefficient of the 10% ZnO/ZnIn 2 S 4 composite with a ZnO loading of 10 wt% was 4.9 times higher than that of ZnO nanoparticles. Therefore, constructing 0D/2D heterojunctions is an effective method for improving the degradation efficiency of ZnIn 2 S 4 toward organic pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yachao Xu,Qi Liu,Jiahui Zhu,Hongsen Zhang,Jingyuan Liu,Rongrong Chen,Jing Yu,Ying Li,Jun Wang
Designing a material that efficiently extracts uranium (U) from natural seawater and resists biofouling remains a critical challenge. Here, flake Znln 2 S 4 grew in situ on the surface of black porous zinc oxide (B-ZnO), and finally a binary composite material (B-ZnO/ZnIn 2 S 4 ) is synthesized. Based on the reduction process of U(VI), the chemical reaction of the U(VI) → U(IV) process occurred on the surface and interface of the composite material. The S-scheme heterojunction system constructed of ZnO and Znln 2 S 4 with a matching band structure showed great potential for promoting the separation and transfer of photogenerated carriers and obtaining powerful photoredox capabilities. By generating biologically toxic free radical reactive oxygen species and Zn 2+ , the adsorbent had high antibiological fouling activity. After 120 min of extraction in simulated seawater, the light-induced reduction ability of B-ZnO/ZnIn 2 S 4 -45% (mass ratio) on U(VI) reached 99%, which was 6.2 times higher than that under dark conditions. The conversion path of U(VI) was calculated by density functional theory (DFT). In addition, ZnIn 2 S 4 (0 0 7) exhibited the ability to localize to the surface of ZnO (0 0 2) and promote electron transfer. These results indicate that interface atomic structure engineering is crucial for the synthesis of efficient and durable seawater U(VI) extraction catalysts.
研究领域:
材料科学
·
环境科学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）