NANOTECHNOLOGY
·
2024
·Vol. 35
·期 15
·155402
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IF 2.9
Wei Zhang,Xing Zhang,Lina Zhang,Jinwen Ma,Xiaotong Yin,Yuxin Tian,Chuang Wang,Qiushi Wang
A novel 3D hierarchical TiO2/CaIn2S4/C3N4 arrays with dual heterojunctions photoanode is constructed by stepwise deposition of CaIn2S4 nanosheets and ultrathin C3N4 onto the well-aligned TiO2 nanorods arrays. Integrating the merit of the superior ability of CaIn2S4 and C3N4 to harvest visible light, dual type-Ⅱ heterojunction band structure and one-dimensional ordered nanostructures, the TiO2/CaIn2S4/C3N4 photoanode exhibits simultaneous significant improvements in visible-light harvesting, charge separation and electron transfer capability. At 1.23 V (versus reversible hydrogen electrode) under AM 1.5 G irradiation, the TiO2/CaIn2S475/C3N4 photoanode exhibits a photocurrent density of 4.5 mA cm−2, which is 5.2 and 51.1-fold higher than that of TiO2/CaIn2S475 and pristine TiO2 photoanode, respectively. Moreover, the applied bias photo-to-current efficiency (ABPE) of the TiO2/CaIn2S475/C3N4 photoanode reaches 3.5% at 0.36 V (versus reversible hydrogen electrode). These results are helpful for fabricating more efficient heterostructure photoelectrodes.
研究领域:
材料科学
·
光催化
·
能源转换
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DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2025
·
IF 6.3
Yuanyuan Wang,Shijun Jia,Shiqiang Ding,Wenyan Zhang,Rui Shu,Yingfei Hu
Using natural minerals to eliminate harmful Cr(VI) under sustainable sunshine has significant potential. Herein, Palygorskite nanorods were utilized as carriers for the in-situ synthesis of CaIn 2 S 4 photocatalysts through a simple one-pot thermal process, enabling the efficient reduction of Cr(VI). With a Palygorskite to CaIn 2 S 4 mass ratio of 5 %, the conversion rate of Cr(VI) reached 98 % after 60 minutes of visible-light exposure, with a remarkable reaction rate of 0.0633 min −1 . The effective integration of CaIn 2 S 4 with Palygorskite led to a more uniform dispersion of CaIn 2 S 4 , exposing more reactive sites. Moreover, the establishment of a heterojunction between CaIn 2 S 4 and Palygorskite facilitated the transport of photogenerated electrons from CaIn 2 S 4 , enhancing the efficiency of charge separation. These factors contribute to the improved photocatalytic performance. Additionally, the developed composite photocatalysts demonstrated excellent stability under light exposure and could be reused efficiently. Trapping tests on active substances revealed that e − played key roles in the Cr(VI) reduction. This research suggests the potential of using natural minerals to fabricate composite photocatalysts capable of effectively removing pollutants from the environment using solar energy.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yuanyuan Wang,Zhanlin Ma,Jian Wang,Jiaqi Ben,Hangmin Guan,Ping Gu,Yingfei Hu
Given the significance of the visible-light-driven reduction of heavy metal chromium (Cr(VI)), it is promising and challenging to investigate photocatalysts that exhibit strong responsiveness to visible light and possess high carrier separation efficiency. In this research, a CaIn 2 S 4 /NiTiO 3 Z-scheme heterojunction has been successfully constructed through the in-situ growth of CaIn 2 S 4 nanosheets on NiTiO 3 nanorods. The energy band alignment between CaIn 2 S 4 and NiTiO 3 in the hierarchical framework facilitated the formation of the heterojunction, which significantly enhanced visible light absorption, promoted the separation of photogenerated carriers, and maintained the high reducing capability of the CaIn 2 S 4 conduction band electrons. These synergies enabled superior Cr(VI) removal efficiency. At an optimized CaIn 2 S 4 to NiTiO 3 ratio of 1:1, about 95 % removal rate of Cr(VI) was achieved within 80 min of visible-light exposure, accompanied by a reaction rate of 0.036 min −1 that is nearly four times faster than that over CaIn 2 S 4 . Furthermore, the charge transfer driving force and reaction mechanisms were comprehensively investigated by optoelectronic measurements, emphasizing the crucial roles of electrons (e − ) in Cr(VI) reduction. This investigation showcases the potential of the CaIn 2 S 4 /NiTiO 3 Z-scheme heterojunction for photocatalytic applications in Cr(VI)-containing wastewater treatment.
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
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Jianjun Ding,Wenhao Yan,Song Sun,Jun Bao,Chen Gao
A series of CaIn2S4-reduced graphene oxide (RGO) nanocomposites with different RGO contents were fabricated using a facile hydrothermal approach. During the hydrothermal process, the reduction of graphene oxide to RGO, in situ deposition of synthesized CaIn2S4 nanoparticles on RGO nanosheets and formation of chemical-bonding CaIn2S4-RGO nanocomposites were performed simultaneously. Under visible light irradiation, the as-prepared CaIn2S4-RGO nanocomposites showed enhanced photocatalytic performance for rhodamine B degradation and phenol oxidation. The sample with 5 wt % RGO hybridized CaIn2S4 exhibited the highest photocatalytic activity. The enhancement of photocatalytic performance may be related to the increased adsorption/reaction sites, positive shift of the valence band potential, and high separation efficiency of photogenerated charge carriers due to the electronic interaction between CaIn2S4 and RGO. We hope that this work can not only provide an in-depth study on the photocatalytic mechanism of RGO-enhanced activity, but also provide some insights for fabricating efficient and stable RGO-based photocatalysts in the potential applications of purifying polluted water resources.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shuang Liu,Qiaofeng Han,Yue Mao,Xiaoheng Liu
It is an interesting research topic on construction of defect- rich structures to enhance the performance of photocatalysts. In this study, CaIn 2 S 4 photocatalyst containing sulfur vacancy was successfully synthesized using a straightforward solvothermal method. The sulfur vacancy concentration in CaIn 2 S 4 was controlled by adjusting the amount of thioacetamide added during preparation. Among the prepared samples, CaIn 2 S 4 -10 sample with excellent photocatalytic performance exhibits superior degradation efficiency (98.2 %) within 50 minutes when the initial methyl orange (MO) concentration was 20 mg/L. Similarly, it shows the highest degradation performance (94 %) against the antibiotic tetracycline hydrochloride (TCH) (20 mg/L). The phase structure, surface element composition, optical properties and other characteristics of the prepared samples were systematically investigated. The findings demonstrate that the CaIn 2 S 4 -10 sample exhibits a decreased band gap width and a negatively shifted conduction band position, which enhances its reduction ability and improves its photocatalytic activity.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Chao Liu,Wen Xiao,Xingyu Liu,Qiang Wang,Jiawei Hu,Siyuan Zhang,Jianguang Xu,Qinfang Zhang,Zhigang Zou
As a highly toxic heavy metal, Cr(VI) reduction by developing high-efficiency photocatalysts is of great significance. Herein, we firstly design few-layer Ti 3 C 2 MXene (FTM) by the hand-operated shaking, showing dual advantages of structural stability and more exposed reactive sites. Then, a refluxed process is performed to fabricate FTM/CaIn 2 S 4 (FTC) composites, where 2D CaIn 2 S 4 (CIS) nanoplates are closely connected with 2D FTM to form Schottky junction. The optimal 1-FTC with the FTM/CIS mass ratio of 1 wt.% exhibits the highest activity toward photocatalytic Cr(VI) reduction under visible light. It is well elucidated that the broadened light absorption range and promoted charge carrier separation rate induced by the introduction of FTM are responsible for improving photocatalytic activity of CIS. During Cr(VI) photoreduction, 1-FTC possesses excellent photo-stability and reusability. The effects of catalyst mass, coexisting ions, water sources and pH values on the Cr(VI) photoreduction efficiency are investigated. Photogenerated • O 2 − and e − are the main radical species accounting for Cr(VI) photoreduction over 1-FTC. The photocatalytic mechanism along with Cr(VI) removal pathway is exploited. This work may provide some insights into constructing FTM-based Schottky junctions for the efficient water purification.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 24
·245709
·
IF 3.953
Ping Rong,Yi Liu,Shiyong Gao,Huiqing Lu,Shuai Ren,Lin Li,Xinzhi Ma,Qicheng Zhou,Junpei Chen,Jinzhong Wang
A novel CaIn2S4 with three-dimensional octahedral nano-blocks (ONBs) are successfully synthesized on fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The CaIn2S4 ONBs are uniform grown and scattered on the whole FTO substrate with high regular and symmetric morphology as well as average diagonal length of about 600 nm. Based on the as-synthesized CaIn2S4 ONBs, a photodetector (PD) is fabricated. Satisfyingly, it is found that the CaIn2S4 ONBs PD achieves a broad-band response ranging from ultraviolet (UV) to visible ( vis) light at zero bias voltage. It is also significant that the CaIn2S4 ONBs PD enables a fast response, in which the rise time and decay time are less than 0.15 and 0.2 s, respectively. Furthermore, the morphological evolution of the CaIn2S4 ONBs and plausible UV/vis detection mechanism of the CaIn2S4 ONBs PD are discussed.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xin Gao,Baodong Li,Shouwei Jian
The fabrication of visible-light-driven heterostructured photocatalysts has been regarded as a promising strategy to enhance the photocatalytic performance. Here, a wet chemical method was adopted to prepare step-scheme CeO 2 /CaIn 2 S 4 (CCIS) composites. The CeO 2 nanoparticles were deposited on the surface of CaIn 2 S 4 (CIS) to form a tight interface, namely, heterojunction , which was confirmed by the multiple characterization methods. The formed heterojunction between CeO 2 and CIS was advantageous to promoting the charge carrier separation and migration. The photocatalytic performance of the resulted CCIS composites were evaluated by the Cr(Ⅵ) reduction under visible light irradiation. The optimized CCIS-10 sample exhibited the highest photocatalytic Cr(Ⅵ) reduction activity with the efficiency of 95% within 105 min. The enhanced photocatalytic activity of CCIS was attributed to the construction of step-scheme heterojunction system, leading to the efficient charge separation and high redox potential . The proposed mechanism for the enhanced photocatalytic performance was fully discussed and confirmed. This work may provide a simple strategy to rationally design efficient photocatalyst for Cr(Ⅵ) removal.
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
Nanomaterials
·
2018
·Vol. 8
·期 7
·472
·
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
·
化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 32
·12630-12637
·
IF 8.262
Jianjun Ding,Xiangyang Li,Lin Chen,Xian Zhang,Song Sun,Jun Bao,Chen Gao,Xingyou Tian
Au–Pt/CaIn2S4 composites were synthesized for the first time using the photoreduction method by which bimetallic Au–Pt alloy nanoparticles were in situ site-selectively photoreduced on the edges of monoclinic CaIn2S4 nanosteps. The Au–Pt alloy nanoparticles as cocatalysts can spatially separate the oxidation and reduction sites and effectively enhance the photocatalytic hydrogen activity of CaIn2S4 under visible light irradiation. When introducing 0.5 wt% Au–Pt alloy nanoparticles, the rate of hydrogen production could reach 107.6 μmol h−1, which was higher than that of CaIn2S4, Au/CaIn2S4 and Pt/CaIn2S4 by a factor of 18.3, 2.37 and 2.4, respectively. The enhanced photocatalytic activity for hydrogen production could be attributed to the low recombination efficiency of the photogenerated charges and surface-plasmon-resonance-induced effect of Au nanoparticles.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 9
·1130
·
IF 4.146
Zhuangzhuang Zhang,Yuanyuan Zhang,Xuanxuan Han,Li Guo,Danjun Wang,Kangle Lv
The novel 2D/2D S-scheme heterostructure of BiOCl nanosheets coupled with CaIn2S4nanosheets (CaIn2S4/BiOCl-SOVs), which contains surface oxygen vacancies (SOVs), has been successfully prepared by high-temperature calcination combined with a solvothermal synthetic strategy. Under visible-light irradiation, the apparent rate constant (Kapp/mim−1) for phenol degradation on the 1 wt% CaIn2S4/BiOCl-SOVs photocatalyst is about 32.8 times higher than that of pure BiOCl. The superior performance was attributed to the synergistic effect between the SOVs, CaIn2S4, and BiOCl, which can effectively narrow the bandgap and accelerate the interfacial charge separation of CaIn2S4/BiOCl-SOVs heterojunctions. Subsequently, it significantly promotes the generation of superoxide radicals (O2−), hydroxyl radicals, and h+, which participate in the photodegradation process of phenol. The catalyst still maintained a relatively high activity after repeated tests as a demonstration of its photostability. This work successfully proposed an efficient method to design a new 2D/2D S-scheme heterostructure with SOVs as possible photocatalysts in the field of environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 5
·1650-1659
·
IF 7
Lina Wang,Zhiping Wan,Xiaoxiang Xu,Jun Qian
Semiconductor heterostructures are of critical importance in steering the flow of photocarriers (i.e. e− and h+). Here, we have fabricated heterostructure-based semiconductor fibers comprising electrospun In2O3 nanofibers coaxially wrapped by CaIn2S4 nanofoils. The hybrid fibers are characterized by a strong interplay between CaIn2S4 and In2O3, enabling fast photocarrier separation to generate copious reactive species for disinfection. When illuminated by visible light (λ ≥ 400 nm), the hybrid fibers deliver exceptionally high photocatalytic activity for bacterial inactivation (7 log-reduction in viable cell count for 20 min), well-outcompeting the parent compounds, CaIn2S4–In2O3 mixtures, and many active photocatalysts reported. The hybrid fibers are type-II semiconductor heterojunctions in nature that can enrich photogenerated e− and h+ at the different components of the hybrid fibers. This work justifies the importance of semiconductor heterostructures in guiding photocarrier flows and offers a paradigm for the design of semiconductor hybrid fibers in the area of photocatalytic bacterial inactivation.
研究领域:
材料科学
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环境科学
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微生物学
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DOI
高影响因子
危险品化学品经营许可证（带存储）