Advanced Sustainable Systems
·
2024
·
IF 6.5
Zixin Zhang,Huaqiang Fu,Zhe Wang,Wei Qian,Xin Zhao,Yunfa Si,Jiannan Guo,Shaowen Cao,Daping He
High-efficiency and sustainable membrane purification technology is highly desirable but unattainable in the field of water treatment. 2D materials are emerging as very promising candidates for water treatment applications. However, membranes assembled by pure 2D materials lack reasonable structural and functional design, usually exhibiting relatively low water permeance, purification performance, and fouling resistance. Here, a mixed-dimensional membrane is designed to solve the above-mentioned problems by assembling two kinds of in situ grown 0D@2D functional building blocks of SiO 2 @GO and TiO 2 @MXene. Specifically, the obtained membrane exhibits high and maintainable water permeance of 2114 L m −2 h −1 bar −1 as well as high rejection rates toward organic dyes thanks to the plentiful firm water channels constructed by 0D@2D structures and the negative charges on both SiO 2 @GO and TiO 2 @MXene, respectively. Moreover, the 0D@2D TiO 2 @MXene serves as photocatalyst, rendering the composite membrane intriguing self-cleaning function under UV irradiation, which is verified by the high recovery ratios of water permeance (97.5%) and dye interception rate (98.7%). Thus, this work offers a promising approach for the design of highly efficient and sustainable membrane for separation and purification purposes.
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
ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Chunquan Li,Ningyuan Zhu,Xiongbo Dong,Xiaoyu Zhang,Ting Chen,Shuilin Zheng,Zhiming Sun
Lamellar kaolinite supported monodispersed TiO 2 was prepared through rational design and 0D/2D structural assembly, which showed significantly improved photocatalytic performance towards ciprofloxacin. After systematic evaluation, the pseudo-first-order kinetic constant rate of TiO 2 /kaolinite composite can reach to 0.04549 min −1 , which was 6.90 and 1.81 times higher than that of pure TiO 2 and P25, respectively. The nano-TiO 2 /kaolinite composite photocatalyst also displayed good reusability performance, only a slight decline occurred after four repeated experiments, which is beneficial for the large-scale application of photocatalysts. Various characterizations indicated that enhanced photocatalytic performance can be ascribed to the synergistic effect between natural kaolinite and the well distributed TiO 2 , which enhanced the light absorption ability, assisted the dispersion of pure TiO 2 , resulted in co-catalysis effect, improved the separation facilitation of photo-induced carriers and promoted the stronger adsorption capacity, etc. These merits effectively regulated the carriers’ lifetime and migration velocity of the photogenerated charge carriers. Considering the excellent properties of natural kaolinite (low cost, abundance, stability, etc.), our study provides a promising candidate for effective degradation of trace amounts of pharmaceutical and personal care product (PPCP) or contaminants with potential high-toxic risk.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiahui Yu,Ping Su,Dong Zhang,Huaihao Zhao,Nan Yang,Tengteng Liang,Dafeng Zhang,Xipeng Pu
Rationally designing a Step-scheme (S-scheme) hetero-structured photocatalyst with high redox capability and separation efficiency of photoinduced carriers is considered as an attractive approach to address the shortcomings of single component and traditional hetero-structured photocatalyst. Herein, enlightened by the predictions of density functional theory (DFT), a unique S-scheme heterojunction photocatalyst was successfully fabricated by incorporating zero-dimensional (0D) Cd 0.5 Zn 0.5 S (CZS) on two-dimensional (2D) lamellar Cu 2 MoS 4 (CMS) plates via a facile coprecipitation method, which substantially enhances the photocatalytic activity for hydrogen (H 2 ) generation. CZS nanoparticles deposited on the surface of CMS nanoplates play a crucial role in creating highly intimate heterojunction interfaces and abundant exposed reaction sites, laying the foundation for improved photocatalytic performance. Furthermore, the significant difference in Fermi levels and band structures between CZS and CMS result in the formation of the internal electric field (IEF) and energy band bending at the interface of the heterojunction. This S-scheme charge transfer path enables 0D/2D CZS/CMS heterojunction possesses an exceptional capacity to maintain the robust redox potential and boosts the separation efficiency of light-induced carriers, as verified by DFT calculations and energy band structure analyses. As expected, the optimal heterojunction exhibits a satisfactory H 2 generation rate of 13.1 mmol·g -1 ·h −1 , which is nearly 7.7-fold higher than that of individual CZS. This study is expected to inspire the design of morphology-controlled hetero-structured photocatalyst with S-scheme charge transfer route for photocatalytic H 2 generation.
研究领域:
材料科学
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光催化
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纳米技术
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能源材料
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DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 36
·15330-15337
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IF 3.5
Fangzheng Qi,Zengsheng Guo,Yuhan Zhang,Xue-Na Tang,Yiqiang Sun,Bo Xu,Guang-Ning Liu,Cuncheng Li
The stable contact of heterogeneous interfaces and the substantial exposure of active sites are crucial for enhancing the photocatalytic performance of semiconductor catalysts. However, most reported two-dimensional (2D)/2D CsPbBr3 and BiOCl heterostructures are fabricated using electrostatic self-assembly methods, which exhibit significant deficiencies in precise interface quality control and effective active site exposure. In this study, we fabricate a zero-dimensional (0D)/2D CsPbBr3/BiOCl heterojunction via a two-step calcination method, achieving an efficient direct S-scheme configuration. Optimizing interfacial contact and band alignment between CsPbBr3 quantum dots and BiOCl nanosheets enhances cross-plane charge transfer, promoting superior charge separation. This 0D/2D CsPbBr3/BiOCl heterojunction exhibits enhanced carrier mobility and high conversion rates without cocatalysts or sacrificial agents. The mechanism underlying the accelerated S-scheme charge transfer is comprehensively elucidated through a combination of analytical techniques and density functional theory (DFT) calculations. This study offers a novel approach for managing charge carrier segregation and mobility in CO2 reduction photocatalysts.
研究领域:
材料科学
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化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qingxue Mu,Guanbin Gao,Zijun Zhang,Bin Zhang,Zhenhua Gu,Xinglin Liu,Liangchong Yu,Lei Shen,Taolei Sun
2D nanosheets-supported 0D nanoparticles (NPs@NSs), a typical 0D/2D nanocomposite, possess unique capabilities to modulate biological processes through non-covalent nano-bio interfacial interactions. However, the underlying molecular basis, particularly the validated criteria for quantifying the non-covalent nano-bio interfacial interaction, remain to be elucidated. In this study, we quantified the non-covalent nano-bio interfacial affinity-energies of NPs@NSs with Alzheimer’s amyloid-β (Aβ) peptides, which were divided into 0D(NPs)-peptide (E 0D-p ) and 2D(NSs)-peptide (E 2D-p ) parts. Our results classified these interactions into three distinct ranges of E 0D-p /E 2D-p < 1, ≈1, >1. Both simulations and experiments demonstrated that NPs@NSs with E 0D-p /E 2D-p < 1 effectively inhibited Aβ fibrillization by stabilizing its monomeric native conformation and even disassembled mature Aβ-fibrils by disrupting their β-sheet structures; whereas NPs@NSs with E 0D-P /E 2D-P ≈1 or > 1 did not exhibit such effects. These findings for the first time provide microscopic molecular insights into the non-covalent nano-bio interfacial interactions between NPs@NSs and peptide chains and offer a validated criterion for engineering 0D/2D nanocomposites to modulate amyloid peptide self-assembly and fibril disassembly, which will enhance the development of nanomedicine for Alzheimer’s and other amyloid-related diseases.
研究领域:
纳米医学
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生物化学
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分子生物学
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DOI
高影响因子
Surfaces and Interfaces
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2024
·
IF 5.7
Yufeng Gan,Yuxiang Yang,Shunyan Ning,Yimin Liu,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Developing heterojunction photocatalysts is a critical method to augment the photocatalytic activity of single semiconductors. However, the instability of their heterostructure poses a significant challenge. Herein, a unique 0D/2D Mn 3 O 4 /CdS p-n photocatalyst has been prepared by a simple one-pot in-situ hydrothermal approach for H 2 production and methylene blue (MB) degradation. The optimized MC-0.18 (18 at% Mn) nanocomposite showed remarkable photocatalytic properties, producing a significantly higher H 2 generation rate of 1291 μmol· g −1 · h −1 , which was 13.7 and 9.2 times higher than that of pristine CdS and ex-situ synthesized MC-0.18-ex photocatalysts, respectively. MC-0.18 displayed the highest reaction rate at 0.0435 min −1 for MB degradation, which was approximately 2.6 and 6.3 times higher than CdS and Mn 3 O 4 , respectively. Active species capture experiments and ESR identified •OH and •O 2 − as the main substances involved in MB degradation. Importantly, MC-0.18 demonstrated excellent stability and reusability in photocatalytic H 2 production and MB degradation cycle tests. The formation of unique p-n heterostructures results in enhanced photoactivity due to the matched band alignment between ultrafine Mn 3 O 4 nanoparticles and CdS nanosheets , leading to a high charge separation capacity. This study offers a facile route to design p-n heterojunctions that have remarkable charge transfer abilities to promote H 2 production and degrade organic dyes.
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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产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Rihong Xiao,Yili Zhang,Zhuo Xiong,Junying Zhang,Yongchun Zhao
Photocatalytic technology has the advantages of environmental friendliness, low energy consumption, and fast reaction speed, which can be applied in the field of visible light mercury removal. High stability and narrow bandgap are fundamental factors for ideal semiconductor photocatalysts. A novel method of hydrothermal synthesis of CQDs/2D-BWO composite catalyst to improve the oxidation efficiency of elemental mercury was proposed. The morphology, physicochemical properties, and optical performance of the materials were fully characterized. The experiment of Hg oxidation efficiency under visible light showed that C 2 /2D-BWO exhibited a Hg removal efficiency of was as high as 86.3 % under visible light and adequate cyclic stability. The effects of SO 2 and NO on Hg oxidation were also studied, and the reasons for the improved of photocatalytic activity of CQDs on 2D-BWO were analyzed based on DFT calculations. The reaction mechanism of the catalytic oxidation of Hg by C 2 /2D-BWO was proposed, and C 2 /2D-BWO was found to be an efficient and stable visible light catalyst.
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Liqun Cheng,Xiaoping Dong
Photocatalysis technology has stimulated extensive research interest in various fields, but several limitations, such as the inefficient separation ratio of photo-generated charges and the possible release of metal ions from metal oxides or sulfides, need to be overcome before its practical application. Herein, we fabricated a metal-free carbonaceous composite photocatalyst via modification of 2D polymeric carbon nitride (PCN) with 0D graphene quantum dots (GQDs) by an ultrasound-assisted route. Characterization results clearly indicated the formation of 0D/2D composite structure with an intimately contacted interface, and the type II band structure promotes the charge separation between PCN and GQDs. As a result, an enhanced photocatalytic activity for degradation of dyes was achieved by the GQDs/PCN in comparison to the single PCN and GQDs. Furthermore, multiple cycling tests reflected the GQDs/PCN had relatively high photocatalytic durability. This study provides a facile method to construct carbonaceous composite and demonstrates it is a promising photocatalyst for environmental remediation.
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DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 16
·2102522
·
IF 6.389
Li-Jiao Ma,Hui-Qin Wu,Bi-Yu Chen,Gang Wang,Bing-Xin Lei,Ding Zhang,Dai-Bin Kuang
0D-2D p–n type CsPbBr 3 /BiOCl heterojunction photocatalyst is successfully fabricated via the electrostatic self-assembly process. On the basis of the photoluminescence and photocurrent density results, the CsPbBr 3 /BiOCl composite exhibits a higher charge separation rate than pure BiOCl and CsPbBr 3 . The degradation of Rhodamine B (RhB) result shows that the CsPbBr 3 /BiOCl composite obtains the highest degradation rate of close to 100% within 60 min, which is significantly higher than those of pure CsPbBr 3 (84.21%) and BiOCl (73.57%) because the p–n type heterojunction photocatalyst can promote the separation of photogenerated charge carriers. The free radical capture experiment demonstrates that •O 2 − plays a major role in the photodegradation of RhB. This study may provide insights into designing advanced photocatalysts for the clean-ups of environmental pollutants.
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DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 35
·355701
·
IF 3.953
Guoying Yao,Liang Zhao,Tao Zeng,Zhenyu Yang
Reduced-dimensional (RD) perovskites have shown attractive chemical and physical properties for optoelectronic applications. Incorporating large organic ligands enables infinite tunability in the components and structures. Theoretically, it is feasible to apply multiple types of organic ligands in a single RD crystal to achieve multiple-dimensional perovskites. However, the coexistence of different organic ligands commonly introduces competing crystal growths that inhibit the formation of a more complex crystal structure. Herein, we report a case of mixed-dimensional (MD) perovskite single crystal containing two types of sulfide-containing ligands. We show that the application of ketones can partially oxidize organothiol ligands in the precursor solution. The resultant disulfide-based ligands can be co-incorporated with the thiol-based ligand in a single MD perovskite crystal. X-ray diffraction confirmed that the structure contains both layered and isolated inorganic components constructed by face-sharing lead halide octahedra. Unlike conventional RD structures, the MD perovskite shows an enlarged bandgap with valence band maximum and conduction band minimum being spatially separated, and isotropic optical features, as revealed by x-ray diffraction, spectroscopies, and density functional theory computation.
研究领域:
材料科学
·
化学
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DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 15
·4893-4902
·
IF 6.177
Keting Feng,Tao Sun,Xiaoyun Hu,Jun Fan,Dongyuan Yang,Enzhou Liu
Photocatalytic H2 evolution is a promising way to obtain green H2 due to its clean and sustainable characteristics. Herein, a series of 0D/2D Co0.85Se/TiO2 heterojunctions were fabricated through a successive two-step hydrothermal strategy. Among them, 15%-Co0.85Se/TiO2 displays the most excellent H2 rate of 2312.5 μmol g−1 h−1, which is 10.3 times and 10.8 times higher than that of TiO2 and Co0.85Se, respectively. And the H2 production rate per electrochemically active surface area of 15%-Co0.85Se/TiO2 is 127.41, which is obviously more than that of TiO2 (14.17) and Co0.85Se (5.39). Based on the core-level alignment method and free radical capture tests, the enhanced activity mainly resulted from the higher electrochemically active surface area and the formation of a p–n heterostructure between TiO2 and Co0.85Se. This research provides a strategy for the development of noble metal-free nanocomposites for efficient photocatalytic H2 production.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jindou Hu,Xiaoyan Lu,Guiling Ren,Xinhui Jiang,Junhong Li,Anjie Liu,Zhenjiang Lu,Jing Xie,Aize Hao,Yali Cao
Pt based noble metal catalysts are important and efficient electrocatalysts during hydrogen evolution reaction (HER). However, the HER of Pt based noble metal catalysts have poor stability and high cost. Herein, Unique Ru loaded the tungsten carbide/nitrogen doped carbon (Ru-WC/NC) 0D-2D nanocomposites were fabricated by gas-phase reduction pyrolysis process to solve the problem of poor stability and high cost. Specifically, 0D WC-supported ultra-small Ru (∼2 nm) was anchored on nitrogen doped carbon nanosheets. Even with a remarkably low Ru loading of just 2.82 %, the developed catalyst achieves comparable high catalytic performance to that of a 20 % Pt/C catalyst and demonstrates superior stability. Under a current density of 10 mA cm −2 , the Ru (2) -WC/NC catalyst shows an overpotential of 30 mV in acidic conditions and 51 mV in alkaline environments. Additionally, the overpotential of Ru (2) -WC/NC lower than that of commercially 20 % Pt/C at high current densities exceeding 50 mA cm −2 . The total potential of water splitting for the two-electrode system comprising Ru (2) -WC/NC with commercial ruthenium oxide was 1.56 V at 10mA cm −2 . Most importantly, the stability of Ru (2) -WC/NC is much better than that of Pt/C. Theoretical calculation results further revealed that the ΔG H* of Ru (2) -WC/NC catalyst could be reduced through synergistic interactions between Ru and WC, thereby optimizing the kinetics of HER. This study offers both theoretical insights and practical methodologies for the synthesis and evaluation of electrocatalysts modified with low loading of noble metals.
研究领域:
材料科学
·
电化学
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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）