SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Huixing Yang,Wei Li,Yangyang Jiang,Qiuming Wei,Linlin Hou,Zhiliang Wu,Qinyu He,Yinzhen Wang,Dingyuan Tang
The proper design of photocatalysts is essential to improving photocatalytic decomposition of water and degradation of pollutants. In this work, we used nitrogen-rich carbon nitride with high electronic properties combined with CdS-DETA to generate CdS-DETA@g-C 3 N 5 composite, and diethylenetriamine (DETA) was used to enhance the band bending to enable the excellent photocatalytic performance of the photocatalyst. The hydrogen evolution rate (14.23 mmol/(g·h)) of the CdS-DETA@g-C 3 N 5 composite is 7.1, 7.5, and 4.5 times higher than that of g-C 3 N 5 (2.03 mmol/(g·h)), 20CSCN5 (1.89 mmol/(g·h)), and CdS-DETA (3.17 mmol/(g·h)), and the OFLX degradation rate (95.6 %) is 3.4 and 1.5 times higher than that of g-C 3 N 5 and CdS-DETA, respectively. These performance enhancements result from the enhancement of energy band bending, the construction of a built-in electric field (IEF), and the retention of high redox carriers. This work provides new insights into the design of nitrogen-rich carbon nitride-based photocatalyst for efficient photocatalytic degradation and hydrogen precipitation activity.
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Physica Status Solidi-Rapid Research Letters
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2023
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IF 2.8
Yawei Wang,Lingling Wang,Yanqin Wang,Xiangyang Zhao,Xingyu Zhang,Xintong Zhang,Yichun Liu
Replacing the traditional CdS buffer layer with more environmentally friendly materials is an urgent issue for environment-friendly CZTSSe solar cells. Herein, a nontoxic, flexible, and conductive organic molecular semiconductor PCBM to replace CdS is used and a Cd-free CZTSSe solar cell is obtained. By introducing mild spin-coated ZnO window layers, the damage of PCBM in conventional sputtering ZnO process is effectively avoided, and a higher efficiency than previously reported organic semiconductor buffer layer systems and comparable to CdS buffer layer devices are achieved. The flexible PCBM covers the surface of the CZTSSe absorber layer densely and forms a flatter film surface, which is beneficial for the following ZnO deposition. The CZTSSe/PCBM interface exhibits a typical “spike-like” energy band alignment with a conduction band offset value of only 0.1 eV. Compared with CZTSSe/CdS interface, the CZTSSe/PCBM heterojunction possesses larger interfacial recombination resistance and a longer carrier lifetime. The ideal coating ability, suitable energy band alignment, as well as the better interface carriers transfer behavior suggest that the organic molecular semiconductors can be used instead of the CdS buffer layer to pave the way for truly environment-friendly kesterite photovoltaic devices.
研究领域:
材料科学
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可再生能源
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环境科学
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Heliyon
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2023
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IF 4
Huazhang Feng,Tingting Xu,Yuanmin Zhu,Yanping Chen,Jingyun Su,Enna Ha,Ran Jia,Kan Zhang,Lei Ma,Luyang Wang
Cadmium-based semiconductors have a wide range of applications in light-emitting, energy conversion, photodetection and artificial photosynthesis. With the concern about the potential toxicity of Cd, it is necessary to recycle the element from the Cd based semiconductors. Commonly, the precipitation of Cd cations with S 2− is deemed as the end point of recycling. However, actually, CdS is easy to be oxidized and released into the environment and accumulate in the food chain. It still remains challenges on how to refine the Cd element and convert it to the raw material. Herein, we demonstrate a facile room temperature method for recycling Cd from CdS. Cd can be produced from CdS within 3 h with the help of the lithium-ethylenediamine solution. DFT calculations further confirm that the high surface energy of (100) and (101) planes are selectively attacked by the solvated electrons in the solution, which is in good accordance with the XRD, STEM-HAADF and XPS characterizations. With a total recovery efficiency of 88%, Cd is successfully recovered from the CdS powder. This method provides a new perspective on the treatment of Cd-based semiconductor waste, which is of great significance for the recycling of cadmium metal.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 7
·6846-6852
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IF 2.195
Zeng Bin,Liu Wanfeng,Zeng Wujun
Development of new and efficient photocatalysts is important for environment pollution solution. In this paper, a novel photocatalyst consisting of CdS dendrites/carbon nanotubes composites (CdS D/CNT) was prepared by a microwave-assisted reaction. X-ray diffraction (XRD), UV–vis diffuse reflectance spectra (DRS), Fourier transform infrared spectra (FTIR), field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were used to analyze the samples. CdS had a dendritic structure and carbon nanotubes (CNT) were wrapped around them. Formation of CdS D/CNT composites was investigated by the time-dependent experiments. The photocatalytic decolorization efficiency of the nanocomposites was examined by the degradation of methyl orange (MO). Our work shows promise in synthesizing metal sulfide/CNT nanocomposites for catalytic and other applications.
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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环境科学
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 8.3
Kejie Zhang,Hongyu Yuan,Yunhao Wang,Chen Mao,Zhen Mou,Peng Chen,Wei Meng,Zhiping Zhou
In this paper, CdS nanopaticles were first prepared by a simple hydrothermal method, and then CoS 2 nanosheet was grown in situ on CdS, thereby successfully constructing CdS/CoS 2 binary heterojunction photocatalyst. The prepared CdS/CoS 2 -15 % nano-heterojunction exhibited the highest hydrogen yield in photocatalytic water decomposition (45.89 mmol h −1 g −1 ), which was 112 times higher than that of single CdS. The high photocatalytic activity and relatively high stability of the CdS/CoS 2 -15 % nano heterojunction could be mainly attributed to the loading of the co-catalyst CoS 2 . Density functional theory (DFT) calculations show that CoS 2 has properties similar to metals, and the Fermi level of CoS 2 are lower than that of CdS. The sheet-like CoS 2 and its higher binding energy provide favorable conditions for the adsorption of hydrogen ions, and its metallic like properties and lower Fermi level help CoS 2 effectively obtain photo generated electrons from CdS, which effectively promotes the production of hydrogen gas. This study provides a useful idea for the development of cost-effective co-catalysts to assist other semiconductor materials in improving the hydrogen production efficiency of visible-light-driven photolysis of water.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yao Jiang,Feifei Huang,Zheng Wang,Bingpeng Li,Junjie Zhang,Shiqing Xu
In this paper, the crystallization kinetics of the sample were systematically investigated, ultimately leading to the successful precipitation of CdS QDs within the borosilicate glass matrix through meticulously designed thermal processing protocols and compositional optimization. Structural and morphological analyses confirmed the in-situ precipitation of crystals with an average diameter of approximately 10 nm embedded in the glass matrix. Notably, the glass sample exhibited a remarkably broad emission band spanning the entire visible spectrum when excited at 396 nm. Additionally, incorporating Eu 3+ into the glass matrix and subjecting it to heat treatment at 500°C resulted in a significant enhancement of photoluminescence intensity and an improved quantum yield. Furthermore, integrating Eu 3+ -co-doped CdS QD glass with a 395 nm blue LED chip produced yellow light emission. This emission demonstrated a color purity of up to 97% and a correlated color temperature of 3402 K. These findings strongly indicate the potential application of Eu@CdS QD glass in micro-LED lighting technologies.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
·
IF 6.1
Nian Liu,Yuqi Zhang,Jiaoyan Huang,Sicong Liu,Taiping Qing,Peng Zhang,Bo Feng
In the realm of sensing, carbon dots (CDs) have exhibited remarkable fluorescence characteristics. In the field of catalysis, CDs can function concurrently as electron donors and acceptors and have substantial electron or hole transport capacities. In this study, both merits were integrated into one, and a one-step hydrothermal approach was used to create multifunctional CDs. On the one hand, CDs are employed as a fluorescence probe with good sensitivity and selectivity to detect Cr(VI). On the other hand, CDs exhibit strong photoreduction capabilities for Cr(VI) in the absence of any external cocatalysts or photosensitizers when acting as photoinitiators. The results show that Cr(VI) quenches the CDs fluorescence as a result of the combined effects of static quenching and the inner filter effect. At the same time, under the condition of illumination, the inner filter effect encourages the CDs electrons to move from the valence band to the conduction band, resulting in electron hole pairs. With the help of electrons' reducing power, Cr(VI) can be rapidly and effectively converted to Cr(III). The findings of this study suggest that CDs are a satisfying bi-functional carbon-based material with significant potential for the treatment of industrial wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Zitong Feng,Shuo Sun,Siyu Zhang,Wanlang Zou,Nan Hang,Linpei Zhou,Xiangyu Wei,Yuxia Sun,Jian Wen,Hongri Liu
Sb 2 S 3 has been paid extensive attentions as absorber for solar cells. Comparing with some oxides , CdS exhibits excellent compatibility to Sb 2 S 3 therefore is most commonly used as buffer layer (BL) materials for Sb 2 S 3 solar cells. Proper passivation can enhance the performance of CdS buffer layer thus raising the performances of Sb 2 S 3 solar cells. Herein, we put forward a self-passivation strategy to enhance the performance of CdS by a two-step deposition process to fabricate the self-passivated CdS BL. First, we adopted spin coating combined with annealing process to prepare flaked CdS on FTO, then we performed passivation process to the CdS by depositing another layer of CdS with chemical bath deposition (CBD) method. After Sb 2 S 3 was deposited on the self-passivated CdS by hydrothermal method , a solar cell with FTO/CdS (∼90 nm)/Sb 2 S 3 (160 nm)/Spiro-OMeTAD(48 nm)/Ag(32 nm)structure was obtained by deposition of hole transport layer and Ag electrodes. Comparing with the single spin-coating processed CdS BL or single chemical bath deposited CdS BL, the self-passivated CdS presents better performance. The CBD process presents distinctive passivation effects to the first layer. In consequence, we obtained the highest PCE of 6.04 % in the Sb 2 S 3 solar cells on the self-passivated CdS BL. The present work supplies a unique route to enhance the performances of CdS buffer layer.
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CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Zihao Chen,Hong Jia,Zihan Liu,Yiping Chen,Jie Wei
In the realms of information storage and display, achieving heightened levels of complexity and security has always been paramount. This study presents a multi-responsive material based on CdS photonic crystals, harnessing the properties of CdS photonic crystals and responsive organohydrogels. We incorporated temperature-responsive monomer N-isopropyl acrylamide (NIPAM), AIE monomer (2-(4-vinylphenyl)ethene-1,1,2-triyl)tribenzene (TPEE), and photochromic unit 2,2-diphenyl-2H-naphtho [1,2-b] pyran-6-carbaldehyde (naphthopyran, Np) into the organohydrogel to prepare the responsive gel material. It was then combined with CdS photonic crystals to fabricate the multistage responsive CdS photonic crystal organohydrogel. This material is not only capable of tuning the structure color of the photonic crystals through temperature but also triggers the AIE effect of the gel upon reaching the phase transition temperature. Additionally, it can initiate the photochromic effect of the material upon exposure to ultraviolet (UV) light. These responsive behaviors underpin the multistage response nature of the material. Capitalizing on these multi-responsive traits, we designed an array of multistage responsive anti-counterfeiting patterns and multistage security codes. This approach not only elevates the density of multi-layered information storage but also fortifies the tamper-resistance of traditional coding systems. The multistage responsive material has a wide spectrum of potential applications, particularly in anti-counterfeiting, information display, and encrypted data transmission, offering fresh perspectives in the domain of information security.
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Catalysts
·
2019
·Vol. 9
·期 4
·379
·
IF 3.444
Guannan He,Yimin Zhang,Qinyu He
High-rate recombination of photogenerated electron and hole pairs will lead to low photocatalytic activity. Constructing heterostructure is a way to address this problem and thus increase the photoelectrochemical performance of the photocatalysts. In this article, molybdenum sulfide (MoS2)/cadmium sulfide (CdS) nanocomposites were fabricated by a facile solvothermal method after sonication. The CdS nanoparticles immobilized on the MoS2sheet retained the original crystal structure and morphology. The composites exhibit higher photoelectrochemical properties compared with pure MoS2nanosheets or CdS powder. When the precursor concentration of CdS is 0.015 M, the MoS2/CdS composites yield the highest photocurrent, which is enhanced nearly five times compared with pure CdS or MoS2. The improved photoelectrochemical performance can be ascribed to the increase of light harvest, as well as to the heterostructure that decreases the recombination rate of the photogenerated electron and hole pairs.Keywords:MoS2nanosheets;CdS nanoparticle;heterostructure;photocatalysis;photoelectrochemical properties
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Siming Luo,Yang Yu,Ningyan Cheng,Xiang Qi,Siwei Luo,Yundan Liu,Jianxin Zhong
Two-dimensional (2D) materials display excellent photoelectric behaviors which makes them promising candidates for photodetectors and related fields. Germanium selenide (GeSe), as an advanced photosensitive 2D material, owns remarkable photo absorption and fast carrier mobility . However, its photo-electron conversion efficiency suffers from high carrier recombination. Building heterojunctions is one effective strategy to facilitate the separation efficiency of photoinduced electron-hole. Here, hybridization of GeSe and CdS is realized and prepared by assembling CdS nanodots on the electrodeposited GeSe film in an ethanol solution, to form a p-n type heterogeneous film on the ITO substrate. A PEC-type photodetector is fabricated based on the GeSe/CdS heterogeneous film, which displays obviously strengthened photocurrent density and photoresponsivity. Meanwhile, such GeSe/CdS PEC photodetector exhibits the capability of self-powered photoresponse and good stability. This heterogeneous structure paves an accessible and practical way for promoting GeSe hybrids toward high-efficient photoelectric conversion devices.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
·
IF 7.305
Jiajia Guo,Yang Mao,Jianping Ao,Yanchen Han,Chun Cao,Fangfang Liu,Yi Zhang
Although the ohmic-contact and electrostatic field can be regulated by the intermediate layer for efficient carrier extraction, challenges remain in high-quality back contact as well as improved quality of crystallized CZTSSe absorber layer simultaneously. Here, we introduce a controllable CdS nanolayer prepared by the chemical bath deposition (CBD) process between the CZTS precursors and Mo back contact. The results disclose that the surface chemistry of the naked Mo film can be modified by the formed CdS nanolayer and thus MoS 2 complex during the chemical bath process. However, such CdS nanolayer and MoS 2 complex can be readily consumed during the following selenization process, without deteriorating the ohmic-back contact. Simultaneously, the as-grown CZTSSe absorber is not only with high crystallinity and less composition fluctuations, but also doped by Cd 2+ . Subsequently the efficiency of CZTSSe solar cells is increased by 26% as CdS nanolayer is introduced. This work provides a cost-effective and universal approach to design and modify the interface or surface of photovoltaic and photoelectrochemical devices.
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