JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Shuang Liu,Qiaofeng Han,Xiaoheng Liu
Utilizing solar energy to produce hydrogen peroxide from oxygen and water offers an appealing and sustainable approach. In this work, Co-doped ZnIn 2 S 4 nanosheets were effectively synthesized through a chemical precipitation method, and the morphological structure, band structure and pathways for hydrogen peroxide production were investigated. The results indicate that Co doping significantly enhances the photocatalytic efficiency of ZnIn 2 S 4 in producing hydrogen peroxide. The sample with the 2 % doping concentration exhibited the highest rate, with a detected hydrogen peroxide concentration of 535.53 µM in the solution after 100 minutes of exposure to visible light, which is 4.29-fold higher than that of undoped ZnIn 2 S 4 . Further analysis revealed that the improved performance mainly originated from better spectral response, faster photogenerated carrier transport, and lower recombination frequency of photogenerated electron-hole pairs.
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
Small
·
2024
·
IF 13
Ning Li,Yong Ma,Jiafeng Ma,Qing Chang,Xiangqian Fan,Lei Liu,Chaorui Xue,Caihong Hao,Huayang Zhang,Shengliang Hu,Shaobin Wang
MoS 2 /ZnIn 2 S 4 flower-like heterostructures into porous carbon (PC@MoS 2 /ZIS) are embedded. This ternary heterostructure demonstrates enhanced light absorption across a broad spectral range from 200 to 2500 nm. It features both Type-II and S-scheme dual heterojunction interfaces, which facilitate the generation, separation, and transfer of photoinduced carriers. The PC enveloped by MoS 2 /ZIS composite microspheres serves as a photothermal source, providing additional energy to the carriers. This process accelerates charge separation and migration, enhancing photothermal-assisted photocatalytic H 2 evolution. The optimal H 2 evolution rate for PC@MoS 2 /ZIS reaches an impressive 18.79 mmol g −1 h −1 , with an apparent quantum efficiency of 14.1% at 400 nm. This work presents a promising approach for effectively integrating multicomponent heterostructures with photothermal effects, offering innovative strategies for efficient solar energy utilization and conversion.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Ligang Ma,Yihuan Ding,Chao Lin,Tingting Chen,Xinlan Li,Shun Yan,Xiang Song,Xiaoqian Ai,Xiaoshan Wu
Photocatalytic water splitting represents a sustainable pathway for hydrogen production, yet the development of efficient and cost-effective photocatalysts remains challenging. Herein, we report the in situ construction of a noble-metal-free coaxial core-shell 1D/3D heterojunction composed of paraotwayite-type α -Ni(OH) 2 nanowire (NIOH) and ZnIn 2 S 4 (ZIS) for significantly enhanced photocatalytic hydrogen evolution. The unique 1D/3D architecture of NIOH@ZIS synergistically combines the advantages of both components: the 1D NIOH nanowires suppress charge recombination by shortening in-plane migration distances, while the 3D ZIS nanoflowers provide abundant active sites and prevent structural aggregation. Under full-spectrum irradiation, the optimized NIOH@ZIS-3 heterojunction achieves an exceptional hydrogen production rate of 7.682 mmol·g⁻¹ ·h⁻¹ , 7.8 times higher than pristine ZIS. Mechanistic studies reveal that the pn heterojunction charge transfer pathway, driven by the built-in electric field at the NIOH/ZIS interface, facilitates efficient separation and utilization of photogenerated carriers. Furthermore, the heterojunction exhibits robust stability over four photocatalytic cycles without performance degradation. This work provides a rational design strategy for high-performance, low-cost photocatalysts through structural and interfacial engineering.
研究领域:
材料科学
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能源科学
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化学
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zengxing Li,Kim Hoong Ng,Shen Xu,Yingzhen Zhang,Yonggang Lei,Jianying Huang,Yuekun Lai
The realization of solar-driven photoelectrochemical (PEC) process lies in the success development of materials with excellent photoelectric properties. Past reports identified TiO 2 , upon modified with both Cd and ZnIn 2 S 4 (ZIS), exhibits promising PEC performance; however, at the cost of tedious preparation. In view of this, our work proposes a facile one-step hydrothermal strategy to deposit both modifiers onto the pre-obtained TiO 2 nanotubes (NTs), realizing rose-like TiO 2 /ZnIn 2 S 4 (TiO 2 /ZIS) or tremella-like TiO 2 /Cd:ZnIn 2 S 4 (TiO 2 /Cd:ZIS) with improved PEC performances. Interestingly, the thickness of ZIS petals, which deposited on top of TiO 2 NTs, is positively-correlated to its Cd-composition, signifying the substitutional doping of Cd into the unit cell of ZIS. This renders robust ionic interactions between the constituents, prompting the enhanced optical properties of TiO 2 in conjecture to its reduced impedance. As a result, the recombination rate of photo-electric-derived carriers was drastically suppressed, with an improved photocurrent density of 606.2 μA cm −2 recorded by TiO 2 /Cd:ZIS photoanode under solar irradiation. Such performance is 80 times and 5.16 times higher than those of bare TiO 2 NTs and TiO 2 /ZIS counterparts. The photoconversion efficiencies in terms of incident photon-to-current conversion efficiency (IPCE) and applied bias photon current efficiency (ABPE) for TiO 2 /Cd:ZIS were significantly improved too, recorded at 1.12% and 0.38%, respectively, under standard evaluation condition. As summary, our work proposes a facile one-step hydrothermal approach that simultaneously-deposit both Cd and ZIS onto TiO 2 photoanode for an enhanced PEC performance. This opens up a wider horizon for PEC technology , further unlocking its potential in both energy and environmental applications.
研究领域:
材料科学
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能源与环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 11
·期 4
·1793-1800
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IF 14.511
Yu Nie,Tingting Bo,Wei Zhou,Huilin Hu,Xiang Huang,Huaiyuan Wang,Xin Tan,Lequan Liu,Jinhua Ye,Tao Yu
How to regulate the energy barrier of *COOH is the rate determining step of the photocatalytic reduction of CO2 to produce gaseous CO. Herein, an appropriate Zn vacancy on ZnIn2S4 was synthesised to achieve the desired photocatalytic CO2 reduction capacity (CO: 5.63 mmol g−1 h−1) and selectivity (CO: 97.9%). Various sulfhydryl groups were selected to regulate the Zn vacancy formation in ZnIn2S4, which directly generated the unsaturated coordination state of the sulfur adjacent to the Zn vacancy accompanied by less electrons when compared to ZnIn2S4 without Zn vacancy. Comprehensive experimental analysis and theoretical calculations demonstrated that the appropriate Zn vacancy tuned the Gibbs free energy of *COOH from the endothermic process to the exothermic process in the process of the photoreduction CO2. This work provided an engineering method for cation vacancies and improvement of the efficiency of photocatalytic CO2 reduction by adjusting the energy barrier of intermediate.
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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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2019
·Vol. 21
·期 11
·1-8
·
IF 2.009
Cao Sheng,Dai Chencheng,Zhao Jialong,Zou Bingsuo
In this work, a facile approach to synthesize the Ag- and Mn-codoped Zn-In-S nanocrystals (NCs) with dual emissions as ratiometric temperature sensors is reported. The as-synthesized codoped Zn-In-S NCs have a uniform size distribution and exhibit a zinc blende ZnS phase structure. Moreover, the as-produced codoped NCs show dual emission peaks which center at green and orange-red regions and have a photoluminescence quantum yield (PL QY) up to 45%. The time-resolved PL spectroscopy and X-ray photoelectron spectroscopy characterizations reveal that the dual emissions of these NCs are derived from the intrinsic emission of Ag + and Mn 2+ , respectively. Moreover, the relative intensity ratio of dual emissions can be tailored by adjusting the Ag and Mn doping concentrations. The as-built ratiometric temperature sensors based on the codoped NCs exhibit a thermometric sensitivity of ~ 0.17% K -1 over a broad window of 80–200 K, suggesting that these codoped Zn-In-S NCs are promisingly used for bio-optical ratiometric temperature sensing.
研究领域:
材料科学
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光学
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生物医学工程
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Haomin Fang,Jiajia Cai,Haijin Li,Jianmin Wang,Yongtao Li,Wei Zhou,Keke Mao,Qinfeng Xu
Ultrathin (ut) two-dimensional (2D) ZnIn2S4 (ZIS) nanosheets have exhibited great potential in photocatalytic hydrogen evolution. Herein, ultrathin 2D/2D MoS2/ZnIn2S4 (ut-MoS2/ZIS) were designed and prepared via two steps of the in situ hydro/solvothermal method. Benefiting from the ultrathin structure and the large and intimate contact between ut-ZIS and MoS2, the charge transfer was increased and the recombination of photogenerated carriers was suppressed. It is also noteworthy that 4 wt % ut-MoS2/ZIS gave the highest hydrogen evolution rate of 221.71 μmol h–1under visible light irradiation (λ > 420 nm), and the apparent quantum yield was measured to be 11.8% at 420 nm. Meanwhile, ut-MoS2/ZIS showed high stability after 16 h of irradiation. PL, TRPL spectrum, and photoelectrochemical measurement demonstrated that MoS2 cocatalyst playeds a vitally important role in the separation of charge carriers and proton reduction reaction. This work is expected to inspire the design and development of highly efficient ultrathin photocatalysts.
研究领域:
材料科学
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光催化领域
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Weigang Cui,Churu Zhang,Shuangjiang Li,Yi Liu,Long Tian,Mengrui Li,Yunfei Zhi,Shaoyun Shan
In this study, copper oxide (CuO) was prepared by the microwave-assisted hydrothermal technique subsequently, CuO was grown in situ onto different rare metal compounds to prepare Z-scheme heterojunctions to improve the degradation efficiency of tetracycline (TC) in water environments. Various characterization proved the successful synthesis of all composite materials, and the formation of tight heterojunction interfaces, among which, the core–shell structure ZnIn 2 S 4 @CuO exhibited excellent photocatalytic degradation capability. Research results indicated that the degradation efficiency of ZnIn 2 S 4 @CuO for TC (50 mg/L) in the water environment reached 95.8 %, and the degradation rate is 2.41 times and 12.93 times that of CuO and ZnIn 2 S 4 alone, respectively, the reason is because of the introduction of ZnIn 2 S 4 , Z-scheme heterojunction structures and internal electric field (IEF) is constructed and formed to extend the visible light response range of photocatalysts to improve electron-hole separation efficiency, and enhance charge transfer. In addition, ZnIn 2 S 4 @CuO-2 exhibited good stability and reproducibility, with no significant loss of activity after five cycles. Finally, the precise locations of free radical attack on TC were investigated by the combined use of high-resolution mass spectrometry (HR-MC) and frontier electron densities (FEDs), and a reasonable degradation pathway was provided. The results of this research provide a new and viable approach to overcome the limitations of conventional photocatalytic materials in terms of limited visible light absorption range and fast carrier recombination rates, which offers promising prospects for a wide range of applications in the field of wastewater purification.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Mengshi Yu,Xiaoyu Lv,Ahmed Mahmoud Idris,Suhang Li,Jiaqi Lin,Heng Lin,Jin Wang,Zhengquan Li
Developing near-infrared responsive (NIR) photocatalysts is very important for the development of solar-driven photocatalytic systems. Metal sulfide semiconductors have been extensively used as visible-light responsive photocatalysts for photocatalytic applications owing to their high chemical variety, narrow bandgap and suitable redox potentials , particularly the benchmark ZnIn 2 S 4 . However, their potential as NIR-responsive photocatalysts is yet to be reported. Herein, for the first time demonstrated that upconversion nanoparticles can be delicately coupled with hierarchical ZnIn 2 S 4 nanorods (UCNPs/ZIS) to assemble a NIR-responsive composite photocatalyst, and as such composite is verified by ultraviolet–visible diffuse reflectance spectra and upconversion luminescence spectra. As a result, remarkable photocatalytic CO and CH 4 production rates of 1500 and 220 nmol g − 1 h −1 , respectively, were detected for the UCNPs/ZIS composite under NIR-light irradiation (λ ≥ 800 nm), which is rarely reported in the literature. The remarkable photocatalytic activity of the UCNPs/ZIS composite can be understood not only because the heterojunction between UCNPs and ZIS can promote the charge separation efficiency, but also the intimate interaction of UCNPs with hierarchical ZIS nanorods can enhance the energy transfer. This finding may open a new avenue to develop more NIR-responsive photocatalysts for various solar energy conversion applications.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hui-Tao Fan,Zhou Wu,Ke-Cheng Liu,Wei-Sheng Liu
Photocatalysis based on metal sulfide semiconductor is considered as an economic, safe, renewable, and clean technology. However, the availability of photocatalysts is limited by the low solar energy utilization efficiency and the fast recombination of photogenerated electron-hole pairs. Developing a hollow heterostructure photocatalyst based on semiconductors for enhancing solar energy utilization and separation efficiency of photogenerated carriers is crucial in the photocatalytic H 2 production reaction. The as-prepared 3D hierarchical nanocages photocatalyst CuS@ZnIn 2 S 4 with abundant and compact nanosheets 2D/2D hetero-interfaces displayed an improved photocatalytic hydrogen evolution rate as high as 7910 μmol h −1 g −1 in the absence of any cocatalyst. This is the first report of the use of CuS nanosheets-assembled hollow cubic cages to construct 3D hierarchical nanocages photocatalysts. The close distance between the two nanosheet subunits induce the strong interaction, which was advantage to the separation and transfer of charge carriers. In addition, the hollow structure can not only enhance light adsorption, but also suppress photogenerated carrier recombination. The experimental characterizations and theory calculations confirmed that the strong interaction between CuS and ZnIn 2 S 4 2D/2D hetero-interfaces can extremely facilitate the separation of photogenerated charge carriers and accelerate the electrons transfer. The present work provides a feasible method to construct heterojunction photocatalyst for hydrogen evolution via water splitting powered.
研究领域:
材料科学
·
光催化
·
纳米技术
·
能源化学
·
半导体物理
·
可持续能源
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Yang Xia,Qin Li,Kangle Lv,Mei Li
In the past few years, more and more efforts have been made on designing novel and efficient semiconductor-based heterojunction photocatalyst to maximize the capture and conversion efficiency of solar energy. In this work, unique TiO 2 hollow sub-microspheres (THSs) and ZnIn 2 S 4 (ZIS) flower-like microspheres were combined through a facile hydrothermal method and novelly applied in photocatalytic metronidazole (MTZ) degradation. The effects of THSs on the physicochemical properties and photocatalytic performance of ZIS were systemically investigated, and the optimal weight ratio of THS and ZIS in the composite was found. Furthermore, various technologies such as photoluminescence (PL), surface photovoltage spectra (SPS) and electrochemical impedance spectra (EIS) were used to verify the intimate contact and highly-efficient charge-carriers transfer between THS and ZIS components. The underlying photocatalysis mechanism was also carefully surveyed and proposed through hydroxyl radicals ( OH) monitoring and radical trapping experiments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Ye Zhang,Xiaobing Yang
Recently, the overuse of tetracycline (TC) has caused persistent adverse effects on both ecological environment and human health. It needs to develop effective methods for removing TC from water. Herein, Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was successfully synthesized and used as catalyst for degradation of TC. The influence of Ag 2 S and ZnIn 2 S 4 on the photocatalytic activity of TiO 2 @carbon were investigated. The results show that the Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon achieved a photocatalytic degradation efficiency of 98.73 %. Moreover, the photocatalytic activity of Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon remained nearly unchanged after four consecutive cycles, with only a 3.2 % decrease in degradation efficiency. Finally, the degradation mechanism of TC over Ag 2 S/ZnIn 2 S 4 @TiO 2 @carbon was elucidated.
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产品关联
DOI
高影响因子
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