NPG Asia Materials
·
2016
·Vol. 8
·期 4
·e263
·
IF 8.772
Long Lu-Lu,Chen Jie-Jie,Zhang Xing,Zhang Ai-Yong,Huang Yu-Xi,Rong Qing,Yu Han-Qing
Metal sulfide semiconductors, such as molybdenum disulfide (MoS 2 ) and bismuth trisulphide (Bi 2 S 3 ), are of considerable interest for their excellent applications in photocatalysis and in many other fields. However, the controllable synthesis of MoS 2 /Bi 2 S 3 hybrid nanostructures remains a challenge. In this study, we report a unique sacrificial templating strategy for preparing layer-controlled MoS 2 on three-dimensional (3D) Bi 2 S 3 micro-flowers. For this approach, Bi 2 S 3 was utilized as a sacrificial template to regulate the ion exchange, and the dosage of molybdenum was adjusted to tune the dynamic formation, thus converting the MoS 2 nanosheets on the Bi 2 S 3 micro-flowers from monolayer to multilayer. Such a 3D flower-like hybrid nanostructure enables MoS 2 /Bi 2 S 3 to exhibit adsorption-promoted photocatalysis under visible light irradiation, especially for the excellent photodegradation of low-concentration organic pollutants, for example, azo dye and atrazine. The observed superiority of the 3D MoS 2 /Bi 2 S 3 was mainly attributed to the increased mass transfer, robust light-harvesting capacity, improved charge separation, lower oxygen-activation barrier and enhanced active oxygen yield. Our findings are of interest for the development of novel S-based photocatalysts and provide a new opportunity to efficiently remove low-concentration refractory pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Jiamei Zhao,Qiangyi Deng,Ziyin Yang,Hongmei Zhang,Conglu Zhang
In this paper, a high-efficient visible light responsive g-C 3 N 4 /CaTiO 3 /CQDs Z-type heterojunction photocatalyst was successfully prepared by a two-step method for the photodegradation of organic pollutants in water. The combination of g-C 3 N 4 , CaTiO 3 and CQDs could produce synergistic effect, which facilitated the separation of carriers, thereby enhancing photocatalytic activity . The photocatalytic kinetic removal rate of g-C 3 N 4 /CaTiO 3 /CQDs for methylene blue could reach about 8 times of g-C 3 N 4 and 5.5 times higher than that of CaTiO 3 . The effects of co-existing ions, initial pH, water source, and humic acid on meloxicam degradation were examined. Repeatability experiments indicated that the composite had good reusability and stability with 81.1 % removal for meloxicam after four cycles. The main active substances of g-C 3 N 4 /CaTiO 3 /CQDs in free radical capture experiment was ⋅O 2 − . Possible degradation pathways of meloxicam were also analyzed. The results highlight the g-C 3 N 4 /CaTiO 3 /CQDs Z-type heterojunction is a desirable photocatalyst for removing organic pollutants in water.
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
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 7
·e7542
·
IF 3.7
Zhiwei Liu,Liying Wang,Shanghai Dong,Lu Li,Jingjing Wang,Zhenzhu Cao,Yongfeng Zhang,Lin Cheng,Jucai Yang
Three distinct morphologies of Bi-MOFs were innovatively employed as carriers, facilitating the formation of heterojunctions with BiPO 4 . Among these, the optimal photocatalytic performance was demonstrated by the type II heterojunction BiPO 4 /CAU-17. Bi 3+ competitively coordinated to crucially aid CAU-17's transformation into a heterojunction, enhancing interfacial contact in BiPO4/CAU-17. These photocatalysts effectively degraded dyes (RhB, MO, MB) and tetracycline (TC) under light exposure. RhB degradation was 3.33 times faster with BiPO 4 /CAU-17 than BiPO 4 , 1.45 times faster than FCAU-17, 1.36 times faster than FRCAU-17, and 1.32 times faster than CAU-17. Analyzing carrier density, Fermi level, and band structure through VB-XPS, UV–VIS, and Mott–Schottky provided insights into enhanced separation of photoexcited electron–hole pairs. This study presents a novel approach to tackle the aggregation challenge of the wide-bandgap material BiPO 4 by using suitable MOFs as carriers. It offers valuable perspectives for the design and application of photocatalysts in environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 17
·7333-7346
·
IF 4.5
Yasin Umsalama Abuelgasim Abubakr,Ahmed Md. Maruf,Zhang Juan,Jia Zhixin,Guo Tianyu,Zhao Ruihua,Shi Jiahui,Du Jianping
Design and development of high-effective photocatalysts to remove multiple organic pollutants are a great challenge. Herein, the band structure of CuO is regulated by constructing the heterostructures between AgBr and CuO, which is realized by controlling hybrid morphologies. The as-prepared AgBr/CuO material consists of CuO nanoflakes and AgBr nanoparticles. Notably, AgBr nanoparticles are adhering on the surface of CuO nanosheets, which favors the formation of heterojunction with point to plane contact and fasten electron transfer. The photocatalytic results show that the AgBr/CuO photocatalyst, prepared by using the 0.1 mol AgNO 3 and KBr as raw materials, presents superior photodegradation activity toward degradation of multi-pollutants with dye concentration of 15 mg L −1 and pH = 7. The methyl violet removal rate reaches 98% within 60 min in the present of 0.1 g catalyst under visible light, and rhodamine B and methyl blue are degraded to 98 and 78% within 90 min. The radical trapping tests prove that photogenerated superoxide radicals (∙O 2 − ) and holes (h + ) act as the main active species in photodegradation of MV. The result indicates that point to plane-contacted heterostructure of AgBr/CuO material plays a key role and it has potential application in the environment remediation. Graphical abstract
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 HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Wei Li,Wei Li,Kuanchang He,Longxiang Tang,Qian Liu,Kui Yang,Yi-Di Chen,Xin Zhao,Kai Wang,Hui Lin,Sihao Lv
Cobalt-based catalysts have been widely explored in the degradation of organic pollutants based on peroxymonosulfate (PMS) activation. Herein, we report an MXene nano-Co 3 O 4 co-catalyst enriched with oxygen vacancies (O v ) and steadily fixed in nickel foam (NF) plates, which is used as an efficient and stable PMS activator for the removal of 1,4-dioxane (1,4-D). Ti originating from MXene was doped into the Co 3 O 4 crystal, generating large amounts of O v , which could provide more active sites to enhance PMS activation and facilitate the transformation of Co 2+ and Co 3+ , causing a high stability. As a result, the 1,4-D removal efficiency of the NF/MXene-Co 3 O 4 /PMS system ( k app : 2.41 min −1 ) was about four times higher than that of the NF/Co 3 O 4 /PMS system ( k app : 0.62 min −1 ). In addition, singlet oxygen was the predominant reactive oxygen species . Notably, the 1,4-D removal of the NF/MXene-Co 3 O 4 /PMS system was over 95% after 20 h operation in the single-pass filtration mode with only 3.72% accumulative Co leaching, showing excellent stability and reusability of NF/MXene-Co 3 O 4 . This work provides a defect engineering strategy to design a robust and stable catalytic system for water treatment , which expands the application of MXene in the field of environmental remediation.
研究领域:
环境科学
·
催化材料
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70041
·
IF 0
Yanzhi Zheng,Yu Sun,Zihan Yang,Yuqing Liu,Xiaotong Sun,Lixia Li,Wanning Cao,Jingkai Yang
There are still challenges to eliminate and reduce the harmful persistent organic pollutants (POPs) in the water, especially the dye-based POPs. Two big obstacles the Ag 3 PO 4 photocatalyst faces are serious carrier recombination and photocorrosion, which presents a limitation for its application in water purification. Therefore, in this work, a novel Ag 3 PO 4 /SrTiO 3 heterojunction was synthesized by a simple in situ deposition method. Ag 3 PO 4 /SrTiO 3 10:1 exhibits the highest photocatalytic activity with rhodamine B (RhB) degradation of 98.8% in only 20 min and methyl orange (MO) degradation of 97.5% in 80 min under simulated sunlight irradiation, which is much higher than that of pure Ag 3 PO 4 and the mixed photocatalysts. During the photocatalytic reaction, h + and •O 2 − are the main active species, and the charge transfer path is satisfied with the Z-scheme mechanism. Additionally, the possible degradation pathways of RhB and MO were proposed by analyzing the intermediate products via HPLC-MS.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yutao Shan,Chen Chen,Ying Liang,Yuliang Chen,Yuliang Wu,Yijiang Liu,Rui Meng,Wenmin Wang,Weiwei Huang,Fei Yang,Xuesong Yi,Jun Cheng
To investigate the photocatalytic synergistic effect and efficiency of composites of iron sulfide (Fe 3 S 4 ) and titanium dioxide (TiO 2 ) after modification with cetyltrimethylammonium bromide (CTAB), this study employed commercial TiO 2 nanoparticles, ferric chloride hexahydrate, and thiourea as precursors to synthesize the catalyst. CTAB was incorporated into the precursors for modification and optimization. A simple one-step solvothermal method was utilized to prepare TiO 2 @Fe 3 S 4 photocatalysts with different CTAB loadings. After modifying the TiO 2 @Fe 3 S 4 photocatalyst with CTAB, its photocatalytic degradation performance for Rhodamine B and sulfamethoxazole was significantly enhanced, the reaction rate constant for its degradation of RhB, calculated using a pseudo-first-order reaction kinetic model, is 0.2187(min −1 ). By guiding the well-distributed construction of semiconductor heterojunctions in Fe 3 S 4 through CTAB in the reaction atmosphere, the spatial uniformity of the heterojunction structure was strengthened. This improvement enhanced the separation capability of photogenerated electrons and holes without compromising their redox properties, thereby exhibiting excellent catalytic efficiency in the degradation of organic pollutants.
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
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2013
·
IF 5.257
Xiaofang Li,Xiuzheng Zhen,Sugang Meng,Jiangjun Xian,Yu Shao,Xianzhi Fu,Danzhen Li
Coupling photocatalysts with photonic crystals structure is based on the unique property of photonic crystals in confining, controlling, and manipulating the incident photons. This combination enhances the light absorption in photocatalysts and thus greatly improves their photocatalytic performance. In this study, Ga2O3 photonic crystals with well-arranged skeleton structures were prepared via a dip-coating infiltration method. The positions of the electronic band absorption for Ga2O3 photonic crystals could be made to locate on the red edge, on the blue edge, and away from the edge of their photonic band gaps by changing the pore sizes of the samples, respectively. Particularly, the electronic band absorption of the Ga2O3 photonic crystal with a pore size of 135 nm was enhanced more than other samples by making it locate on the red edge of its photonic band gap, which was confirmed by the higher instantaneous photocurrent and photocatalytic activity for the degradation of various organic pollutants under ultraviolet light irradiation. Furthermore, the degradation mechanism over Ga2O3 photonic crystals was discussed. The design of Ga2O3 photonic crystals presents a prospective application of photonic crystals in photocatalysis to address light harvesting and quantum efficiency problems through manipulating photons or constructing photonic crystal structure as groundwork.
研究领域:
材料科学
·
环境科学
·
光学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Lei Zhao,Dan Yang,Lili Ma,Xueting Feng,Hanming Ding
It is a long-term goal to develop catalysts with high activity and stability in practical applications. Spinel FeCo 2 O 4 has been widely researched in heterogeneous catalysis due to its characteristics of stable structure and environmental friendliness. In this work, the composites of graphitic carbon nitride ( g -C 3 N 4 ) and spinel iron cobaltate (FeCo 2 O 4 ) have been fabricated and used to degrade rhodamine B (RhB) by combining the photocatalytic and Fenton-like reactions. The composite with 3% FeCo 2 O 4 (3%FeCo 2 O 4 /CN) showed the best degradation efficiency, with which about 98% RhB was degraded in 45 min. The catalytic activity of 3%FeCo 2 O 4 /CN was larger than that of FeCo 2 O 4 , g -C 3 N 4 , and their mechanical mixture. The synergetic interaction between photocatalytic and Fenton-like reactions and the effective separation of the photogenerated charges are responsible for the enhanced catalytic activity. The quenching and EPR experiments exhibit that SO 4 − , O 2 − , h + , and ΟΗ, especially SO 4 − , are involved in the removal of RhB. The cycle experiments confirm that the used catalyst can restore its catalytic activity after calcination at 400 °C. The work suggests that the composites show a good ability to degrade organic pollutants in wastewater.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Anjli Sharma,Sanjeev Kumar Kanth,Shishi Xu,Ni Han,Lei Zhu,Lele Fan,Chao Liu,Qinfang Zhang
A highly potential visible light active g-C 3 N 4 /Bi 4 NbO 8 X (Cl, Br) heterojunction photocatalysts were constructed at the interface of the coupling between Bi 4 NbO 8 X (Cl, Br) and g-C 3 N 4 . The band gap value of heterojunctions g-C 3 N 4 /Bi 4 NbO 8 Br-20% (CNBNB-3), g-C 3 N 4 /Bi 4 NbO 8 Cl-20% (CNBNC-3), and pristine materials g-C 3 N 4 (CN), Bi 4 NbO 8 Cl and Bi 4 NbO 8 Br were analyzed to be 2.68 eV, 2.69 eV and 2.74 eV, 2.46 eV and 2.48 eV, respectively. The degradation performance of optimized CNBNC-3 and CNBNB-3 photocatalysts revealed much superior removal efficiency of 97% and 84% than the pristine material for rhodamine B. The synthesized photocatalysts maintained good recyclable stability after five consecutive cycles and potentially capable of pollutant degradation. The electrochemical impedance and photoluminescence spectroscopy revealed that the migration and separation efficiency of photogenerated charge carriers of photocatalyst were boosted, while reduced recombination rate was observed. The photocatalytic reaction mechanism also revealed the superoxide ·O 2 − and • OH radicals are the main active species responsible for the pollutant degradation.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bin He,Mi Feng,Xinyan Chen,Yuandong Cui,Dingwei Zhao,Jian Sun
The limited photocatalytic performance of g-C 3 N 4 has become a bottleneck that restricts the widespread applications in degradation of organic pollutants. In this study, an efficient 1D/2D g-C 3 N 4 /g-C 3 N 4 homojunction was constructed by the synergistic category of dual-ions induction in one pot fashion, integrating multi-advantages of homojunction and doping alkali metal potassium (K). Systematic characterizations confirmed the formation of K ion decorated 1D/2D homojunction structure, and revealed a possible fabrication mechanism. The photocatalytic performances were evaluated towards degrading rhodamine B (Rh B), and ciprofloxacin hydrochloride (CFH), respectively, representing dyeing and antibiotic wastewater treatment. Compared to pristine g-C 3 N 4 , the as-modified catalysts exhibited obvious activity enhancements in both photo-degradation reaction rates, and efficiencies of Rh B and CFH. Detailed information from DRS, ESR, PL results revealed that the obtained excellent performance might ascribe to the improvement of the separation of photogenerated carriers, the harvest of visible light, and the yields of active species. Moreover, the reaction mechanism and stability test were also studied in detail. This study provided a new category for constructing efficient and ion-doping homojunction structure for the enhancement of visible-light activity of g-C 3 N 4 and would promote practical applications of solar energy and metal-free semiconductors.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yuangong Ma,Wensheng Zhang,Zhifang Wu,Zhishan Liang,Youlin Huang,Qingmei Tan,Tianren Liu,Dongxue Han,Li Niu
In the realm of photocatalysis, effectively utilizing solar energy, especially the near-infrared (NIR) spectrum, presents substantial challenges. To tackle this issue, a novel composite of NaYF4:Yb3+/Er3+@Cu2O@MoS2@Fe3O4 (denoted as NYE@Cu2O@MoS2@Fe3O4) was ingeniously fabricated and assessed for the photodegradation of organic contaminants. By harnessing the distinct properties of upconversion materials, narrow bandgap semiconductors, and magnetic substances, the NYE@Cu2O@MoS2@Fe3O4 catalyst possesses a photodegradation rate of 92% for the rhodamine B dye under NIR light radiation, which is superior to NYE@Cu2O (50%) and NYE@Cu2O@MoS2 (85%). The enhanced performance in the near-infrared photocatalysis of NYE@Cu2O@MoS2@Fe3O4 is mainly attributed to the synergistic effect of various components, which promotes an increase in photo-induced carrier generation and facilitates their efficient transfer and energy utilization under NIR irradiation. This study provides a possible route for the near-infrared photocatalytic degradation of pollutants in areas with limited light or even dark conditions.
研究领域:
材料科学
·
环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）