Nanomaterials
·
2018
·Vol. 8
·期 7
·472
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IF 3.504
Siyu Xu,Jun Dai,Juan Yang,Jun You,Jingyi Hao
A series of novel and efficient heterostructured composites CaIn2S4/ZnIn2S4have been synthesized using a facile hydrothermal method. XRD patterns indicate the as-prepared catalysts are two-phase composites of cubic phase CaIn2S4and hexagonal phase ZnIn2S4. FESEM (field emission scanning electron microscope) images display that the synthesized composites are composed of flower-like microspheres with wide diameter distribution. UV–Vis diffuse reflectance spectra (DRS) show that the optical absorption edges of the CaIn2S4/ZnIn2S4composites shift toward longer wavelengths with the increase of the CaIn2S4component. The photocatalytic activities of the as-synthesized composites are investigated by using the aqueous-phase Cr(VI) reduction under simulated sunlight irradiation. This is the first report on the application of the CaIn2S4/ZnIn2S4composites as stable and efficient photocatalysts for the Cr(VI) reduction. The fabricated CaIn2S4/ZnIn2S4composites possess higher photocatalytic performance in comparison with pristine CaIn2S4or ZnIn2S4. The CaIn2S4/ZnIn2S4composite with a CaIn2S4molar content of 30% exhibits the optimum photocatalytic activity. The primary reason for the significantly enhanced photoreduction activity is proved to be the substantially improved separation efficiency of photogenerated electrons/holes caused by forming the CaIn2S4/ZnIn2S4heterostructured composites. The efficient charge separation can be evidenced by steady-state photoluminescence spectra (PLs) and transient photocurrent response. Based on the charge transfer between CaIn2S4and ZnIn2S4, an enhancement mechanism of photocatalytic activity and stability for the Cr(VI) reduction is proposed.Keywords:CaIn2S4/ZnIn2S4composites;Cr(VI);photocatalysis;simulated sunlight;hydrothermal method
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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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
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
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DOI
高影响因子
OPTICAL MATERIALS
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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
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环境科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2024
·
IF 8
Xiaoman Li,Yuanhua Liu,Haiming Huang,Jianhua Cheng
Photocatalysis-self-Fenton combining photocatalytic production of H 2 O 2 with Fenton reaction has been a hotspot, but the pH limitation and iron sludge production problems remain unsolved. Herein, we proposed a self-fenton system based on N-doped carbon dots modified ZnIn 2 S 4 (NCDs@ZnIn 2 S 4 ) composites that exhibits effective degradation of antibiotics under neutral pH using low amounts of Fe 2+ . The decoration of ZnIn 2 S 4 with NCDs significantly increased the surface area, visible light absorption, charge transfer ability and oxygen adsorption ability. NCDs@ZnIn 2 S 4 composites exhibited a high H 2 O 2 production rate (1528 μM g −1 •h −1 ) under visible light, which was 1.9 and 5.3 times higher than ZnIn 2 S 4 and NCDs, respectively. Meanwhile, the Fe 2+ /NCDs@ZnIn 2 S 4 system with a low concentration of Fe 2+ (1 mg/L) could remove over 95% levofloxacin and oxytetracycline within 30 min. Interestingly, the highest degradation efficiency occurred under neutral pH. Quenching experiments and analytical measurements indicated that the high catalytic performance under pH = 7 with low amounts of Fe 2+ stemmed from the higher amount of inner-generate H 2 O 2 under neutral pH and easy regeneration of Fe 2+ by photoinduced electrons for high •OH yields. Additionally, the Fe 2+ /NCDs@ZnIn 2 S 4 system exhibited high degradation performance under different water matrix and ultrahigh degradation efficiency towards levofloxacin under real sunlight irradiation. The work shows the prospects of photocatalysis-self-Fenton systems for overcoming the pH limitation and the difficulty of iron sludge separation in the purification of effluents.
研究领域:
环境科学
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材料科学
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光催化
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产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Ming Li,Jianhao Qiu,Lvye Yang,Yi Feng,Jianfeng Yao
Various TiO 2 /ZnIn 2 S 4 composites with an embedded structure have been developed by a facile one-pot synthesis. The activities of all samples were estimated by photocatalytic reduction of Cr(VI) under visible light (λ>420 nm). Results showed that the electrostatic interaction and self-assembly effect make TiO 2 nanoparticles inserting into ZnIn 2 S 4 nanosheets. The resulting TiO 2 /ZnIn 2 S 4 composites show much better photocatalytic performance for Cr(VI) reduction than that of pristine TiO 2 and ZnIn 2 S 4 . Especially, the photocatalytic efficiency of T/ZIS-0.3 (TiO 2 loading of 30 wt%) is approximate 3 times as high as that of pristine ZnIn 2 S 4 (TiO 2 exhibited almost no activity). The embedded structure of TiO 2 /ZnIn 2 S 4 offers apparent increase of specific surface area, visible-light absorption and electrons transfer efficiency, which are responsible for the boosted photocatalytic activity. This work would inspire researchers to construct high-efficiency semiconductor composites for photocatalytic environmental governance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 4
·1030-1039
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IF 5.721
Quan Zhang,Juhua Zhang,Lu Zhang,Fengli Yang,Lingfeng Li,Wei-Lin Dai
At present, inefficient charge separation is considered to be one of the most important factors, limiting the photocatalytic hydrogen production. To solve this problem, herein, hierarchical Cu7S4/ZnIn2S4 decorated with black phosphorus quantum dots (BPQDs) was rationally designed and its photocatalytic hydrogen evolution was investigated under visible light. The structural characterization proved the wrapped morphology of ZnIn2S4 grown on the Cu7S4 nanocrystals and BPQDs were uniformly dispersed on the surface of ZnIn2S4. Moreover, the close hierarchical structure of Cu7S4 with ZnIn2S4 and carrier separation facilitator of BPQDs were synergistically beneficial for boosting charge separation and transfer. The hydrogen production results showed that the ternary BPQDs@10% Cu7S4/ZnIn2S4 yielded the highest H2 evolution rate of 885 μmol g−1 h−1, about 6.8 times higher than that of the pristine ZnIn2S4, indicating its promising application in hydrogen production. In addition, the possible working mechanism was deeply explored using photo-electrochemistry, and the results illustrated that the enhanced photocatalytic hydrogen evolution can be attributed to the efficient charge separation caused by the formation of the hierarchical interface structure and increased carrier transfer efficiency of BPQDs. This study demonstrates that the regulation of interfacial charge transfer can positively facilitate photocatalytic activity and the ternary BPQDs@10% Cu7S4/ZnIn2S4 can be employed as an efficient candidate for hydrogen production.
研究领域:
材料科学
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化学工程
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纳米技术
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能源科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 29
·期 50
·76404-76416
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IF 5.19
Hu Jie,Lu Songhua,Ma Jianfeng,Zhu Fang,Komarneni Sridhar
In this paper, the g-C 3 N 4 /ZnIn 2 S 4 composite was synthesized by a two-stage hydrothermal method. The microstructure, surface, and optical properties of the composite were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface area analysis, and UV-Vis absorption spectroscopic analysis. The removal capacity of Cr(VI) was optimized by using ZnIn 2 S 4 loaded in the composite. Meanwhile, the optimal pH environment for the reduction of Cr(VI) was determined to be about pH 3, and the reduction efficiency could reach more than 99% within 60 min. Further, the results of UV-Vis absorption analysis indicated the high and wide range of light absorption by composite compared with pure g-C 3 N 4 . Therefore, the enhanced photocatalytic performance of the composite could be attributed to the well-matched energy band structure between g-C 3 N 4 and ZnIn 2 S 4 , which apparently promoted the effective separation and transfer of photogenerated carriers. In addition, the composite showed good stability in the visible light catalytic reaction, and the possible mechanism of the photocatalytic activity of Cr(VI) reduction by the composite was proposed.
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
Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 4
·933-942
·
IF 3.9
Meng-Yuan Zhu,Feng-Jun Zhang,Ying-Rui Wang,Ze-da Meng,Chao-qun Mi
Transition metal sulfides are widely used in visible photocatalysis due to their suitable forbidden band widths. In this work, square platform Cu2MoS4/lamellar ZnIn2S4 composites were successfully prepared by solvent thermal and self-assembly methods. The crystalline shape, microstructure and optoelectronic properties of the composites were explored by XRD, SEM, TEM, XPS, and photocatalytic hydrogen evolution performance experiments. The results show that the absorption of the composite material in the visible region is significantly enhanced compared with that of the pure sample, and the specific surface area reaches 58.39 m2 g−1, which is about 3 times that of pure Cu2MoS4, providing more reaction adsorption sites. Photocatalytic hydrogen evolution experiments show that the best performance was achieved when Cu2MoS4 : ZnIn2S4 = 4 : 6. Namely, the composite CMS/ZIS-2 exhibited the highest hydrogen evolution performance of 3104.25 μmol h−1 g−1, which was about 434 and 13 times higher than the pure Cu2MoS4 and ZnIn2S4 photocatalytic performance, respectively. The improved performance is mainly attributed to the loading of lamellar ZnIn2S4 on the surface of Cu2MoS4, which organically combine to form a heterojunction, enhancing the light absorption in the visible region and suppressing the complexation of photogenerated carriers, thus improving the photocatalytic hydrogen evolution efficiency.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
·
IF 5.816
Xiaoming Liu,Suqing Wang,Fang Yang,Yinchu Zhang,Liushui Yan,Kexin Li,Huiqin Guo,Jiajun Yan,Jun Lin
In this paper, a novel Au/g-C 3 N 4 /ZnIn 2 S 4 plasma photocatalyst heterojunction composite with 3D hierarchical microarchitecture has been successfully constructed by integrating Au/g-C 3 N 4 plasmonic photocatalyst composite with 3D ZnIn 2 S 4 nanosheet through a simple hydrothermal process. The Au nanoparticles were firstly anchored on the surface of pristine g-C 3 N 4 material to get Au/g-C 3 N 4 plasmonic photocatalyst. Ascribing to the surface plasmon resonance of Au nanoparticles , the obtained Au/g-C 3 N 4 plasmonic photocatalyst shows a significant improved photocatalytic activity toward hydrogen production from water with visible light response comparing with pristine g-C 3 N 4 . Further combining Au/g-C 3 N 4 plasmonic photocatalyst with 3D ZnIn 2 S 4 nanosheet to construct a heterojunction composite. Owing to the synergistic effect of the surface plasmon resonance of Au nanoparticles in Au/g-C 3 N 4 and the heterojunction structure in the interface of Au/g-C 3 N 4 and ZnIn 2 S 4 , the prepared Au/g-C 3 N 4 /ZnIn 2 S 4 plasma photocatalyst heterojunction composite shows an excellent photocatalytic activity toward hydrogen production from water with visible light response, which is around 7.0 and 6.3 times higher than that of the pristine C 3 N 4 and Znln 2 S 4 nanosheet, respectively. The present work might provide some insights for exploring other efficient heterojunction photocatalysts with excellent properties.
研究领域:
材料科学
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催化化学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Ying Chen,Man Wang,Bingbing He,Rongjiang Zou,Qiang Wu
Efficient photocatalysts with visible light irradiation have a bright future in practical environmental remediation. ZnIn 2 S 4 is a promising environmentally friendly visible-light photocatalyst, due to its appropriate narrow band gap and excellent chemical stability. In this research, the RP/ZnIn 2 S 4 composites with flower spheroidal morphology were synthesized by loading RP onto the surface of ZnIn 2 S 4 via a one-pot hydrothermal process. The experimental results show that the tetracycline (TC) degradation efficiency of RP(1 wt%)/ZnIn 2 S 4 was up to 85.1 %, compared with pure RP, ZnIn 2 S 4 , and other series of RP/ZnIn 2 S 4 composites. The optimal degradation conditions were as following: 1 wt% RP modification amount, 30 mg catalyst amount, 30 mg/L initial TC solution concentration, and the initial reaction pH of 7. At the same time, good repeatability and stability of RP(1 wt%)/ZnIn 2 S 4 toward TC removal confirm its potential value for practical applications. In addition, the degradation efficiency of RP(1 wt%)/ZnIn 2 S 4 for rifamycin and ofloxacin under the similar conditions was 80.2 % and 65.3 %, respectively, indicating the universal application of RP/ZnIn 2 S 4 for degradation of different antibiotic pollutants. The possible photocatalytic mechanism was proposed based on the trapping experiment and ESR test. The RP(1 wt%)/ZnIn 2 S 4 composite photocatalytic materials with high efficiency and stability are expected to contribute to the exploration of the environmental protection field.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zuming He,Kai Lin,Ngie Hing Wong,Jaka Sunarso,Yongmei Xia,Xiaofei Fu,Jiangbin Su,Zhengyi Huang,Yong Wang,Bin Tang
Semiconductor photocatalysis technology for environmental remediation faces primary challenges, such as charge-carrier recombination and interfacial charge transfer inhibition, which affect its degradation efficiency in removing organic contaminants. In this work, we successfully synthesized a unique Z-scheme KNbO 3 /ZnIn 2 S 4 hollow core–shell microsphere via a combined hard template, thermal treatment, and hydrothermal processes as the photocatalyst for ciprofloxacin (CIP), oxytetracycline hydrochloride (OTCH), and rhodamine B (RhB) remediation under sunlight irradiation. Compared to the pure KNbO 3 and ZnIn 2 S 4 , our optimized 15-KNbO 3 /ZnIn 2 S 4 composite exhibited enhanced photodegradation performance with up to 99.8 %, 96.8 % and 97.5 % for CIP, OTCH, and RhB removal within 110 min, respectively. At the KNbO 3 /ZnIn 2 S 4 heterojunction interface, the composite developed its internal electric field and enhanced its photoabsorption under visible light region, thus boosting its charge separation. Subsequently, we evaluate the removal of total organic carbon (TOC) concentration and the influence of different ions on CIP degradation. In addition, we systematically investigated the Z-scheme charge migration process within the heterojunction with a series of experiments. Our results indicated that the hydroxyl and superoxide radicals were the dominant active species during photocatalysis. The composite also could achieve excellent stability and adaptability. We also managed to identify the CIP-degraded intermediates and deduce their possible degradation pathways. Lastly, our toxicity analysis revealed that CIP toxicity could decrease gradually during photocatalysis. In this work, we presented a unique method for preparing inexpensive and highly efficient Z-scheme hollow core–shell structure photocatalysts with excellent antibiotic remediation in water under simulated sunlight illumination.
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
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Chang-Long Tan,Ming-Yu Qi,Zi-Rong Tang,Yi-Jun Xu
Highly efficient photodriven conversion from biomass-derived platform chemicals to value-added chemical feedstocks and clean fuel hydrogen (H 2 ) possesses immense potential to cope with the existing energy and environmental problems. We herein report a facile approach combining hydrothermal method and photodeposition method for fabricating diverse sulfide-based cocatalysts (MoS 2 , NiS and WS 2 ) decorated ZnIn 2 S 4 (ZIS) for simultaneous exploitation of photogenerated electrons and holes, effectively achieving the oxidation of furfuryl alcohol (FOL) cooperative with H 2 evolution in one photoredox cycle. The results show the optimal binary MoS 2 -ZIS composites can obtain almost 7 times yield of products (furfural and H 2 ) as high as that of blank ZIS. Notably, compared with previous reports in literatures, our present MoS 2 -ZIS shows the best performance in this photoredox dual reaction. As a relay station for electrons, cocatalysts facilitate the separation and transfer of photogenerated charge carriers in the composites, therefore prominently improving the photocatalytic performance. We anticipate that the present work can offer insights to guide the design of photoredox reaction systems for efficient valorization of biomass-derived platform chemicals.
研究领域:
化学工程
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材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）