MATERIALS SCIENCE FORUM
·
2022
·
IF 0
Zhe Yuan Liu,Ling Fang Qiu,Shu Wang Duo,Jin Yong Lu,Ying Ying Hou
In this work, CdS nanosheets were synthesized by microwave hydrothermal method. We used a simple synthesis method to prepare Mn3O4/CdS composites. The crystal phase, surface chemical component and optical properties of Mn3O4/CdS, Mn3O4 and CdS were analyzed based on the characterizations such as XRD, FT-IR, DRS and PL. Mn3O4/Cd composites showed obvious broadened visible-light adsorption at wavelength over 460 nm. When the mass ratio of Mn3O4 and CdS was 1.0%, Mn3O4/CdS displayed the best RhB degradation efficiency which was 22.39% higher than the pure CdS. The improved photocatalytic efficiency should be attributed to the lower photo-induced electron–hole pair recombination rate and accelerated transfer rate of photogenerated electrons based on heterojunction structure. The achievements provided new way to exploring novel CdS-based heterojunctions for decomposing organic pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Yue Chen,Huan Liu,Liang Hu,Youliang Shen,Lingfang Qiu,Liezhen Zhu,Qianxiang Shi,Xun Xu,Ping Li,Shuwang Duo
Novel Z-scheme ZnIn 2 S 4 /TiO 2-x photocatalyst was successfully fabricated through self-sacrificing template-chemical bath deposition combined with a NaBH 4 reduction method for the first time. It was found that ZnIn 2 S 4 /TiO 2-x exhibited high-efficient visible-light photocatalytic RhB degradation of 91 % within 40 min, which was almost 45.5, 1.2, and 6.1 times better than that of TiO 2 , ZnIn 2 S 4 /TiO 2 , and TiO 2-x , respectively. Moreover, an obscure change in catalytic activity can be observed after five recycles. The excellent photocatalytic performance can be attributed to the synergistic effect of Ov, ZnIn 2 S 4 , and MOF-derived TiO 2 , which extend the visible-light photoresponse range and promote the separation of photo-generated charge carriers.
研究领域:
材料科学
·
化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 11
·2631-2640
·
IF 6.087
Yuting Cai,Jun Song,Xiaoyan Liu,Xia Yin,Xiaoran Li,Jianyong Yu,Bin Ding
TiO2-based heterojunction fibrous membranes with stable hierarchical nanostructures, excellent visible-light-driven photocatalytic activity, and easy-recycling ability would hold great promise in environmental remediation; however, it still remains a great challenge to construct such fantastic fibrous membranes. Herein, soft and hierarchical heterostructured BiOBr-anchored TiO2 nanofibrous membranes (BiOBr@TiO2 NFM) were fabricated by the sol–gel electrospinning technique combined with a facile successive ionic layer adsorption and reaction (SILAR) process. The well-crystallized BiOBr nanoplates with lamellar structure were uniformly grown onto TiO2 nanofibers, and the size and amount of BiOBr nanostructures could be finely regulated through rationally adjusting the growth cycles of SILAR. Benefiting from the large surface area, enhanced visible-light response, and intimately connected interfacial heterojunctions, the resultant membranes exhibited superior photocatalytic performance for rhodamine B (RhB) degradation under visible light irradiation, including a high degradation efficiency of 95.5% within 120 min and excellent reusability in 5 cycles. More importantly, the membranes still maintained good mechanical flexibility and structural integrity after utilization and could be directly extracted from solution. This study may provide a new strategy for the design and fabrication of soft hierarchical nanostructured TiO2-based fibrous membranes for environmental remediation and other potential applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 27
·19174-19184
·
IF 3.9
Peixin Hu,Hechao Lu,Qinting He,Fang Ren,Juan Wu,Wei Jiang
In this work, intelligent pH-sensitive sensors (Fe3O4/RhB@PAM) for Cr(VI) detection were successfully synthesized based on polyacrylamide (PAM) and Rhodamine B (RhB) co-modified Fe3O4 nanocomposites. The characterization results indicated that the sensors had many favorable properties, including suitable size, stable crystal structure and excellent magnetic response performance (47.59 emu g−1). In addition, the fluorescence changes during the detection process indicated that Fe3O4/RhB@PAM were “ON–OFF” intelligent sensors. When the Fe3O4/RhB@PAM sensors were placed in acidic Cr(VI) solution (pH 4), PAM acted as a pH-responsive “gatekeeper” releasing RhB, and the fluorescence intensity of released RhB was weakened by the complexation of Cr(VI). Furthermore, the fluorescence changes of the magnetic sensors were remarkably specific for Cr(VI) even in the presence of other competitive cations, and the limit of detection (LOD) for Cr(VI) was lower (0.347 μM) than the value recommended by the World Health Organization (0.96 μM). All the results presented in this study showed that the Fe3O4/RhB@PAM sensors had significant potential for Cr(VI) detection in acidic environmental samples.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Songtao Zhong,Hui Zhou,Ming Shen,Yufeng Yao,Qiang Gao
It is vital for environment purification to design and prepare an artificial photocatalyst that can effectively separate photogenerated carriers and maintain the redox ability of system. In this paper, a g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 photocatalyst was rationally designed and successfully prepared via two-step in-situ transforming process. The results of X-ray diffraction, Fourier transform infrared spectroscopy , X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis, and transmission electron microscopy confirm the successful synthesis of ternary g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts. The photocatalytic activities of all catalysts were assessed by the degradation of Rhodamine B (RhB) under simulated sunlight illumination. The g-C 3 N 4 /BiOI/Bi 2 O 2 CO 3 catalysts showed much higher photocatalytic activities than single g-C 3 N 4 , or BiOI and dual g-C 3 N 4 /BiOI. The results of electron spin resonance and active species trapping experiments revealed that h + and • O 2 − were responsible for the photodegradation of RhB, and a possible photogenerated carrier transport mechanism was proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2020
·Vol. 74
·期 11
·4067-4074
·
IF 1.68
Xu Yan-Heng,Xu Ge,Sun Ming-Yue,Wang Kun
In this paper, polymeric graphitic carbon nitride (pgCN) with disordered in-plane and ordered inter-plane structure was prepared via a two-step method of low-temperature solvothermal synthesis and post-calcination, using dicyandiamide and cyanuric chloride mixture as raw materials and acetonitrile as solvent. Disordered in-plane structure of the pgCN was confirmed by X-ray diffraction (XRD), transmission electron microscope (TEM) and electron diffraction (ED). The microstructure, chemical states, bandgap, charge migration and photocatalytic performance of the pgCN were compared with that of classic bulk graphitic carbon nitride (bulk g-C 3 N 4 ) obtained from melamine by calcination and its post-hydrothermal product. The pgCN showed highly efficient in both the photodegradation of Rhodamine B (RhB) and hydrogen evolution reaction (HER) benefiting from disordered–ordered hybrid plane structure which can inhibit photoelectron recombination and provide higher charge separation efficiency. Under visible light irradiation, the average HER rate of pgCN could reach 4541 μmol h −1 g −1 , which is 18.2 times higher than that of bulk g-C 3 N 4 crystal.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 34
·21084-21096
·
IF 3.361
Tingting Chen,Shan Hu,Quanfeng Xing,Xiaofeng Yu,Jinming Chen,Xiaolong Li,Xiuquan Xu,Bo Zhang
Embedding heterocycles into the skeleton of g-C3N4 has been proved to be a simple and efficient strategy for improving light response and the separation of photo-excited charges. Herein, 2-thiobarbituric acid incorporated g-C3N4 (TBA/CN) with good photocatalytic efficiency for Rh B degradation and H2 production was successfully achieved via a facile thermal copolymerization approach. The incorporation of aromatics and S atoms into the skeleton of g-C3N4 was identified via systematic characterizations. This unique structure contributed to the narrowed band-gap, extended delocalization of lone pair electrons and changed electron transition pathway, which led to the enhanced visible light utilization, accelerated charge migration and prolonged electron lifetime, subsequently resulting in the significant boost of photocatalytic activity. The optimal TBA/CN-3 sample yielded the largest Rh B degradation rate constant k value of 0.0273 min−1 and simultaneously highest rate of H2 evolution of 0.438 mmol g−1 h−1, which were almost 3.5 and 3.8 folds as fast as that of the pristine CN, respectively. Finally, the photocatalytic mechanism was proposed for the detailed elucidation of the process of Rh B degradation coupled with H2 production.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 58
·46897-46903
·
IF 3.84
Yi Zheng,Gang Chen,Yaoguang Yu,Jingxue Sun,Yansong Zhou,Fang He
The first example of an all tungsten based Z-scheme photocatalyst (composed of WO3·0.33H2O and PbWO4) has been synthesized via an ion exchange method. The composites exhibit much higher photocatalytic activities than those of individual hydrated tungsten trioxide and lead tungstate. The apparent photodegradation rate constants of RhB over the composites are more than 6 to 8 times higher than those of the two monomer components. After 30 min, the RhB can be removed almost completely by the composite, while only 30% RhB and 35% RhB can be, respectively, eliminated for the two single components. In addition, the composite photocatalyst displays excellent activity in the photodegradation of methyl orange (MO). The relationship between the two monomer components has been investigated using XRD, Raman, XPS, SEM, and TEM measurements. The hydrated tungsten trioxide is formed on the surface of lead tungstate via a complex process that includes ion exchange and crystal structure rearrangement. Ion exchange occurs at the end of the (110) facet of lead tungstate. The results of photocatalytic mechanism and photodeposition Pt experiments indicate that the excellent photocatalytic activity of the composite photocatalyst is due to the advantage of its Z-scheme configuration. This study suggests that highly effective Z-scheme photocatalysts can be built by ion exchange.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Min Zhang,Yiguo Jiang,Xiuquan Xu,Xiaofeng Yu,Wenyan Shen,Miaomiao Luo,Luyao Ding,Haiwen Chen
The reinforced light-harvesting capability, suppressed photocarrier recombination and increased specific surface area represented a possibility of excellent photocatalytic performance for graphitic carbon nitride (g-C 3 N 4 )-based photocatalysts . Herein, the porous 1,3,5-Trihydroxybenzene substituted g-C 3 N 4 (denoted as PTBCN) composites with superior visible-light-driven photocatalytic properties were rationally constructed via a two-step reaction combination of freeze-drying and thermal-polymerization. The optimal PTBCN-2 achieved the maximum photocatalytic Rhodamine B (Rh B) degradation and H 2 O 2 evolution rate constants, nearly 6.56 and 3.17 times higher than that of bare g-C 3 N 4 . The outstanding performances of PTBCN-2 were probably attributed to the extended specific surface area, robust visible light response, adjusted electronic band structure , accelerated separation and transfer of photocarriers as well as good hydrophilicity. As a result, the above integrated merits were directly responsible for the huge superoxide anion ( • O 2 − ) generation, which dominated the efficient photocatalytic reactions. This work provided a new idea to design and construct high efficiency porous aromatic ring substituted g-C 3 N 4 -related photocatalysts for organic pollutants degradation and H 2 O 2 production.
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
RSC Advances
·
2016
·Vol. 6
·期 94
·91791-91797
·
IF 3.289
Jia-yi Pu,Jin-quan Wan,Yan Wang,Yong-wen Ma
In this study, Co-based MOF with a 2D structure, 3D microrod structure and 3D nano-dodecahedral structure was synthesized by the coordination of cobalt ions and different organic ligands. Then, Co3O4, which was derived from these Co-based MOFs, was used to activate oxone for RhB degradation. It was found that the morphology and structure of the templates can significantly influence the formation of the nano Co3O4 products, which has an indirect effect on the catalytic ability of the resulting Co3O4 for oxone to degrade RhB. Among the products, nano-sphere Co3O4, which was derived from a template with a 3D nano-dodecahedral structure (ZIF-67) can effectively activate oxone to degrade RhB. Under neutral conditions, the rate constant of the degradation of RhB (0.1 mM) was 0.0509 min−1 with 50 mg L−1 catalyst and 1.0 mM oxone based on first-order kinetics. In addition, the influence of a series of parameter factors (pH, the dosage of catalyst and oxone) on the catalyst was also studied. Low cobalt ion dissolution (0.04 mg L−1 at pH = 3, <0.01 mg L−1 at pH = 7) and good recyclability (degradation rate of RhB after 5 cycles: close to 96%, 89% at pH = 7, pH = 3) further proved that the as-prepared Co3O4 can be used as a promising catalyst.
研究领域:
环境化学
·
材料科学
·
催化化学
·
纳米技术
·
环境污染治理
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 18
·185601
·
IF 3.953
Heli Yang,Yizun Liang,Chi Wang,Xin Song,Yanqing Ge,Ran Lang,Kai Li,Yi Mei
Black phosphorus (BP) is a two-dimensional (2D) semiconductor that has recently attracted much interest due to its unique characteristics. However, BP is susceptible to oxidization under ambient conditions. In this work, a facile one-step route is presented, in which stable P–C bonds were formed by ball milling bulk BP and multi-walled carbon nanotubes (MWCNTs) mixture without any additives. The BP-MWCNTs hybrid and the milled BP (m-BP) were both dispersed in water under ambient conditions, and their optical absorbances were monitored. The resulting data showed that the absorbance value of the BP-MWCNTs hybrid decreased by 10.87% after 5 d, whereas the m-BP decreased by 59.21%. Surprisingly, the BP-MWCNTs hybrid also exhibited ultrahigh photocatalytic activity in the visible light range. Within 60 min of irradiation, the removal efficiency of rhodamine B (RhB) by the BP-MWCNTs hybrid reached 88.42%, which is four times higher than that of the bare m-BP. This improvement can be attributed to the formation of the P–C bond and the enhanced surface adsorption capacity resulting from the introduction of the MWCNTs, indicating that the utilization of the charges on the surface of the photocatalyst is further improved. In short, this study not only provides an easy method to synthesize the stable BP-based material for practical applications but also represents a new approach to enhance the photocatalytic activity of BP.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xiaoyu Qiu,Linting Zou,Jianmei Cen,Xingnian Duan
In this research, Mo-oxides complexes combined with Co(OH) 2 grown on three-dimensional (3D) nickel foam (Mo-Co(OH) 2 /NF) were developed as a peroxymonosulfate (PMS) activator enabling a pathway transition from radical to non-radical for efficient degradation of organic pollutants. The incorporation of high-valence Mo species promoted the formation of sheet structure and facilitated the Co(II)/Co(III) ratio, while Co served as the primary active site for PMS activation. Consequently, complete removal of 40 mg/L Rhodamine B (RhB) in optimized conditions (catalyst = 1.5 cm 2 , 0.4 g/L PMS dosage, reaction temperature = 25 °C) was achieved within 2 min. In addition, excellent adaptability was exhibited over a wide pH (3.0–9.0) and versatility (99 %, 80.94 % and 91.54 % for MB, LFX, and TC, respectively) in Mo-Co(OH) 2 /NF + PMS system. Impressively, radical scavenging experiments and electron spin resonance (ESR) analyses revealed that the degradation process was mainly dominated by the conversion of O 2 •– to non-radical 1 O 2 . Hence, this work demonstrates the potential of high-valent metal-oxides complexes integrated with Co(OH) 2 as effective PMS activators for non-radical degradation of dye and other refractory antibiotics, significantly broadening their applications in environmental remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）