Coatings
·
2024
·Vol. 14
·期 12
·1492
·
IF 2.9
Shumeng Qin,Ruofan Xu,Qiu Jin,Sen Wang,Yi Ren,Yulin Huang,Ziye Zheng,Lihui Xiao,Dong Zhai,Shuguang Wang,Zuoli He
For typical Cr(VI)-containing industrial wastewater, more efficient water treatment technologies need to be used to ensure that Cr(VI) concentrations are reduced to safe levels before discharge. Photocatalytic technology is highly efficient, environmentally friendly, and has been extensively used to address this demand. Herein, heterogeneous NiCo2S4/BiOBr photocatalysts with different ratios were prepared using a solvothermal method. When compared with pure NiCo2S4and BiOBr, the NiCo2S4/BiOBr-30 had significantly increased adsorption capacity and visible-light-driven photocatalytic reduction activity for Cr(VI) removal. The improved adsorption performance of the NiCo2S4/BiOBr-30 was mainly due to its increased specific surface area, and the enhanced photocatalytic performance of the NiCo2S4/BiOBr-30 could be attributed to the improved separation and transfer of photogenerated carriers at the interface. Lastly, a possible enhanced photocatalytic Cr(VI) reduction mechanism of the NiCo2S4/BiOBr heterostructure was developed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 56
·32368-32376
·
IF 2.936
Yichang Yu,Chengjun Li,Shoushuang Huang,Zhangjun Hu,Zhiwen Chen,Hongwen Gao
The xSiO2–BiOBr (x = 0–5) and SN–SiO2–BiOBr hybrids were synthesized via a facile one step co-precipitation method. To determine the optimal formula, the photocatalytic degradation of C. I. reactive red 2 (X3B) with xSiO2–BiOBr (x = 0–5) was investigated. Under simulated sunlight irradiation, 4SiO2–BiOBr exhibited a better photocatalytic efficiency than other materials; 1.77 and 1.51 times higher than conventional nano TiO2 and pure BiOBr, respectively. To demonstrate the photocatalytic degradation mechanism, the effect of active species on degradation of X3B was carried out, and a possible degradation pathway was proposed. To realize the combined treatments of adsorption and photocatalysis, an inorganic/organic (I/O) SN–SiO2–BiOBr hybrid was further strategized and synthesized. It showed much better adsorption performance than the SiO2–BiOBr composite. It could enrich organic pollutants by facile adsorption, and then degrade them to H2O and CO2 under natural sunlight irradiation. Notably, this sunlight-driven photocatalysis can be performed in the slurry resulted from the pollutant adsorption. As a result, the proposed combination of adsorption and photocatalysis will provide a novel strategy to greatly facilitate the treatment of organic wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 10
·105202
·
IF 3.399
Miao Hu,Aihua Yan,Ji Huang,Fei Huang,Fan Li,Qiaopeng Cui,Qi Li,Xinyang Wang
In the last ten years, bismuth oxybromide (BiOBr) has attracted wide attention due to its superior optoelectronic property. However, its practical application still suffers from slow carrier transport and high carrier recombination. Here we report a kind of novel tannum indium sulfide (SnIn4S8)/BiOBr hybrid prepared by a two-step hydrothermal method. The results showed that small amount of SnIn4S8 had no influence on the crystal phase of BiOBr, but the morphology could be regulated from nanosheet to nanoflower. Specially, SnIn4S8 exerted a slight effect on the light absorption and band gap of BiOBr. Importantly, SnIn4S8/BiOBr hybrids exhibited remarkable enhancement of the photocatalytic activity towards the degradation of rhodamin B (RhB) dye molecules. SnIn4S8/BiOBr-0.20 with 99.8% degradation efficiency had the highest photocatalytic activity within 40 min, while it was only 71.1% for pure BiOBr. The enhanced photocatalytic activity was mainly attributed to efficient interfacial transfer and low carrier recombination. This work will help us understand the photocatalytic mechanism of bismuth oxyhalide hybrids.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 15
·7278-7287
·
IF 3.3
Jie Zhang,Xuemeng Tian,Chaochao Dong,Ruixia Gao,Yuan Hu
There is a growing awareness of practices focused on the in-depth treatment and decontamination processes of firefighters’ personal protective equipment to decrease health risks. Hence, TiO2-nanoparticle-modified Cu-doped BiOBr microflowers (BiOBr–Cu2+/TiO2) have been devised and used as effective constituents to construct a type of decontamination agent that can efficiently and deeply eliminate hazardous chemicals. The 3D microflowers can be admirable carriers for the prevention of aggregation and outstanding adsorption, and the construction of a heterojunction based on the copper-doping strategy and sequential harvesting of light strategy provides enhanced light absorbance and efficient charge separation. The proposed materials have a nanoparticle-interspersed microflower morphology, enhanced light-harvesting ability, and excellent transfer of photogenerated carriers, leading to more effective adsorption and solar-light-driven photocatalytic activity than other catalysts. Moreover, the BiOBr–Cu2+/TiO2 composites mixed with different solvents can be used as decontamination agents for the in-depth treatment of hazardous chemicals under different situations. It is believed that employing heterojunctions as the constituents of decontamination agents has promise to become an effective and feasible method for deep decontamination processes in firefighting work.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Guizhu Wu,Yan Zhang,Jingyu Sun,Xue Chen,Ze Zhang,GuiChang Wang,Mingyang Liu
In recent years, various strategies focused on regulating the different defect types and concentrations have been put forward to alter the photo- or electro-catalytic performance of nanomaterials (NMs), such as chemical vapor deposition, thermal annealing, heavy ion irradiation, etc . Herein, a simple strategy for regulating the concentration of oxygen vacancies was developed by in-situ Bi reduction of BiOBr nanoflowers (Bi-BiOBr), largely influencing its photocatalytic activities under the visible light irradiation. The first-principle computation and experimental results revealed that the enhanced doped Bi caused high concentration of oxygen vacancy, thus effectively improving the transfer and separation of photogenerated e - /h + pairs. High concentration of reactive species such as superoxide radical and singlet oxygen was obtained, which led to an efficient antibacterial activity. Meanwhile, Bi-BiOBr exhibited strong binding ability to bacterial cells due to its abundant oxygen vacancy, showing excellent photodynamic performance under visible light irradiation.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
YuChen Wang,Changjian Liu,XinRui Liu,JingRu Han,LiJun Yang,Xiaoyuan Liao,Yue Yao
The photocatalytic production of hydrogen peroxide is a sustainable approach to producing oxygen and water. In this work, the microspheres flake-like, sheet-like, and flower-like BiOBr were by varying different solvents during the reaction process. The investigation revealed that the highest hydrogen peroxide production of 294 μmol g −1 h −1 was obtained for BiOBr(0 0 1). Their physico-chemical properties are fully investigated by XRD, SEM, XPS, ESR, and DFT calculation, which confirmed the exposure surface of BiOBr has a close relationship with the oxygen vacancy concentration, and BiOBr(0 0 1) has the highest oxygen vacancy concentration (oxygen vacancy formation energy 4.17 eV) and the best photocatalytic effect. DFT calculation also showed that the introduction of oxygen vacancies increased the adsorption and activation capacity of O 2 and greatly reduced the Gibbs free energy of the reaction pathway.
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
WATER ENVIRONMENT RESEARCH
·
2017
·Vol. 89
·期 7
·614-621
·
IF 0.91
Xinxin Yue,Weilin Guo,Xianghui Li,Xiaomei Gao,Guangyou Zhang
In this study, a novel composite containing an iron based metal-organic framework (MOF) and BiOBr was successfully synthesized by a simple method, and was fully characterized by X-ray diffraction patterns, Fourier transform infrared spectra, UV-vis diffuse reflectance spectra, and transmission electron microscopy. Moreover, the photocatalytic activities of BiOBr/MIL-88B(Fe) composites and the pure materials were evaluated by measuring the degradation of Rhodamine B under visible light. The results show that the composite exhibits better photocatalytic activities than pure materials, which can be ascribed to the high adsorption capacity of MIL-88B(Fe) and the enhanced separation of photogenerated charge carriers from assembly of MIL-88B(Fe) on BiOBr. And the effects of various operating parameters such as catalyst dosage, medium pH, the mass ratio of BiOBr, and MIL-88B(Fe) and the dye initial concentration on the degradation of RhB have been studied.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Yingshu Wang,Shuyue Wang,Jiasi Gan,Jinni Shen,Zizhong Zhang,Huidong Zheng,Xuxu Wang
One-pot synthesis of urea [(NH2)2CO] from easily available small molecules, that is, N2, CO2, and H2O, is an extremely attractive but very challenging reaction. 2D-CdS@3D-BiOBr composites with S-scheme heterojunctions are constructed via a facile hydrothermal technique followed by a self-assembly method and shown to be an excellent photocatalyst enabling the reduction of N2 and CO2 with H2O to (NH2)2CO under visible light. The optimal 40%2D-CdS@3D-BiOBr sample shows up to 15 μmol·g–1·h–1 total yield of NH3 and (NH2)2CO, of which (NH2)2CO accounts for 54%. The apparent quantum efficiency (AQE) is 3.93% for urea production. On the photocatalyst, urea is speculated to form by two possible chemical routes. One is direct photocatalytic synthesis. Both N2 and CO2 molecules are activated by the Cd2+ ion of 2D-CdS and the oxygen defect of 3D-BiOBr at the edges of the heterojunction interface of 2D-CdS/3D-BiOBr, respectively. *HNCONH* is the key intermediate of the formation of (NH2)2CO molecules. The other is indirect synthesis by photocatalysis and then thermocatalysis. N2 is reduced into NH3 and CO2 is reduced into CO on 2D-CdS by the photogenerated electrons and protons, and then the formed NH3 reacts with the reactant CO2 or the product CO to form (NH2)2CO by thermocatalysis on 2D-CdS. The former is dominant for urea synthesis. The work confirms that urea could be synthesized photocatalytically from cheap N2, CO2, and H2O under visible light. A composite heterojunction semiconductor could be a prospective photocatalyst appropriate for the complex reaction.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Feihu Zhang,Xinyan Xiao,Yu Xiao
A novel 3D hierarchical flower-like BiOBr/Bi 3 O 4 Br heterostructure photocatalyst was synthesized by in-situ growth of ultrathin BiOBr on the surface of Bi 3 O 4 Br nanosheets through a solvothermal process. The 3D hierarchical heterostructure endows BiOBr/Bi 3 O 4 Br heterojunction with a large specific surface area and tight interfacial contact, which can provide sufficient channels for carrier migration. The introduction of Bi 3 O 4 Br can enhance the light absorption ability of BiOBr/Bi 3 O 4 Br photocatalysts. Furthermore, the staggered type II heterostructure energy band alignment formed between BiOBr and Bi 3 O 4 Br can promote the separation of photo-excited carriers. The improved performance of carrier migration and light absorption ability was evaluated by SEM, TEM, BET, EIS , and DRS tests. The results of transient photocurrent response and photoluminescence tests confirmed the improvement for separating photoexcited carriers. The optimal 20% BiOBr/Bi 3 O 4 Br sample exhibited the greatest photocatalytic degradation rate of 97.1% for RhB and 89.4% for TC, under 90 min of simulated solar light irradiation. Its apparent rate constant k values are 0.03378 and 0.02013 min −1 , being 9.44 and 2.18 folds than that of Bi 3 O 4 Br, 2.76 and 1.47 folds than that of BiOBr. The free radical scavenging experiment results showed that h + and •O 2 - are the prime active species during the photodegradation process. Hence, a possible photocatalytic mechanism of type II BiOBr/Bi 3 O 4 Br heterojunction was proposed.
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
·
2024
·
IF 5.8
Ping Li,Huanhuan Wu,Chengming Zhang,Quangui Liang,Huihui Ding,Haibao Zhu,Jun Ma,Xiang Li,Shuangshuang Huai,Congliang Cheng,Xiufang Wang
The lack of active sites and the low availability of photoelectrons severely limit the photocatalytic reduction of nitrogen to ammonia in semiconductor materials. Here, we successfully designed a BiOBr/O v -TiO 2 -Cu heterojunction catalyst toward N 2 fixation into NH 3 . The optimized BiOBr/O v -TiO 2 -Cu heterojunction has a promising photocatalytic performance and stability with the highest NH 3 yield of 259.82 μmol·g −1 ·h −1 . The combination of detailed theoretical simulation calculations and comprehensive characterizations indicates the BiOBr/O v -TiO 2 -Cu heterojunction with oxygen vacancy (O v ) stabilized Cu nanoparticles (NPs) as active sites can effectively adsorb and activate N 2 molecules. The close contact between BiOBr and Ov-TiO 2 elevates the quick transmission of photogenerated electrons at the interface and the enrichment on Cu NPs. This work not only provides an efficient photocatalyst for the N 2 reduction, but also supplies theoretical support for identifying the active sites and charge transfer kinetics of the nitrogen reduction reaction.
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
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Hao Yang,Qingxia Zhang,Ying Chen,Yong Huang,Fang Yang,Zhong Lu
ZnO coated fabrics have attracted wide attentions due to their antibacterial and photocatalytic self-cleaning properties. However, the photo-response of ZnO only in ultraviolet region limits its application. In this paper, ZnO/BiOBr functionalized cotton fabrics were synthesized by a facile and time-saving ultrasonic-microwave combined method. Compared with ZnO coated fabric, the photocatalytic activity of ZnO/BiOBr coated fabric under visible light irradiation was remarkably improved at no sacrifice of its antibacterial activity. Simultaneously, it also showed good resistance to bacterial adhesion and photocorrosion. The introduction of two-dimensional BiOBr nanoflakes not only enhanced the visible light absorption, but also reduced the recombination rate of electron-hole pairs, thus significantly improving the photocatalytic self-cleaning performance of the coated fabric under visible light irradiation. The ZnO/BiOBr coated cotton fabric with both antibacterial and self-cleaning functionalities may have broad application prospects in the fields of textile, medicine and chemical industry.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shuaiqi Zhao,Xiaolei Yang,Yumeng Ge,Hongbin Zhang,Jie Li,Keyu Han,Shiqing Xu,Gongxun Bai
The all-inorganic perovskite nanocrystals are promising luminescent materials for optoelectronic devices. However, it is still a challenge to prepare perovskite nanocrystals with high luminescence. Herein, a synthesis method was developed for the uniform incorporation of ultra-thin BiOBr nanosheets into perovskite crystals at both body-embedding and surface-passivating positions. The micron-scale green-emitting phosphors composed of Cs 4 PbBr 6 nanocrystals and BiOBr nanosheets are prepared. The crystal structure of Cs 4 PbBr 6 nanocrystals can remain almost unchanged although prepared from different PbBr 2 concentrations. The luminescence mechanism of Cs 4 PbBr 6 is discussed. The Cs 4 PbBr 6 @BiOBr submicron phosphors can be dispersed in DMSO solvent without disintegration and dissolution, which are used as seeds of the CsPbBr 3 film growth. The CsPbBr 3 films with Cs 4 PbBr 6 @BiOBr doped exhibit pure optical characteristics of CsPbBr 3 , indicating that Cs 4 PbBr 6 is converted to CsPbBr 3 during the film preparation process. Furthermore, these Cs 4 PbBr 6 @BiOBr phosphors are mixed with CaAlSiN 3 : Eu red-emitting commercial phosphors to make white LEDs (WLEDs). Overall, this study provides a revealing insight into a kind of composite material constructed with halide perovskite and bismuth halide oxide.
研究领域:
材料科学
·
光学工程
✓ 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）