Article
Chemistry, Physical
Zhixiang Cui, Shengnan Tian, Xiaolong Liu, Qianting Wang, Sen Zeng, Junhui Si
Summary: The efficient elimination of toxic dye and Cr(VI) from wastewater by photocatalysis is achieved using a thermoplastic polyurethane (TPU)/titanium dioxide (TiO2)/polyaniline (PANI) fiber membrane. The membrane exhibits enhanced photocatalytic capacity, good stability, and easy recovery, making it a potential candidate for wastewater treatment.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Biotechnology & Applied Microbiology
Rachita Lakra, Manikantan Syamala Kiran, Purna Sai Korrapati
Summary: The study focused on the green synthesis of silver nanoparticles with furfural for the photocatalytic reduction of hexavalent chromium. The efficiency of FAgNPs in reducing Cr(VI) was investigated with varying initial concentration, pH, catalyst dosage, and time. It was observed that FAgNPs showed a reduction efficiency of 9% to 88% at pH 2 under UV illumination.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Minzhang Li, Qikun Hu, Haiquan Shan, Wenjian Yu, Zong-Xiang Xu
Summary: The combination of CuPc and N-CuMe2Pc with rGO to form CuPc/rGO and N-CuMe2Pc/rGO nanocomposites significantly improves the removal efficiency of Cr(VI), with N-CuMe2Pc/rGO exhibiting higher specific surface area, higher light harvesting, higher conductivity, and more negative lowest unoccupied molecular orbital level.
Article
Environmental Sciences
Yitao Zhao, Le Li, Yuanjie Zuo, Guangyu He, Qun Chen, Qi Meng, Haiqun Chen
Summary: This study aims to optimize the conformation of nanocomposite for enhancing the photocatalytic removal of heavy metal contaminants, with ZnO/CdS6:5/RGO(6) showing strong recycling performance.
Article
Environmental Sciences
Rokhsareh Akbarzadeh, Negin Farhadian, Anvar Asadi, Tahereh Hasani, Setaya Salehi Morovat
Summary: A facile method to produce black TiO2 with improved light absorption in the visible and infrared regions was developed in this study. The synthesized Bi-V co-doped black TiO2 showed high photocatalytic activity in reducing Cr(VI) under visible light irradiation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Ya-Qi Zhang, Lin Hou, Hao-Xue Bi, Xiao-Xue Fang, Yuan-Yuan Ma, Zhan-Gang Han
Summary: Visible-light-driven photocatalytic reduction of Cr(VI) using three hourglass-type phosphomolybdate-based hybrids has been studied, showing superior activity compared to inorganic {Zn[P4Mo6](2)} clusters alone. The organic components in the hybrids play a significant role in affecting visible-light absorption and recombination of photogenerated carriers, ultimately enhancing the photocatalytic performances towards Cr(VI) reduction.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Engineering, Chemical
Shengxin Cao, Xiaozhou Ye, Huiru Hu, Haoran Jin, Yun Wang, Jianfeng Ye
Summary: Mesoporous anatase TiO2 sphere based materials have been extensively studied for environmental applications due to their advantageous properties. By utilizing mesocrystalline anatase submicrospheres, novel sphere-shaped anatase mesocrystal/SrTiO3 nanodot heterostructures were successfully developed and showed enhanced activity in reducing hexavalent chromium under solar light. This study provides a useful method for designing TiO2 based photocatalysts with complex spherical morphologies for environmental purification.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Fang Xu, Wanning Cao, Jinzhou Li, Songsong Zhi, Zhiyong Gao, Yuqin Jiang, Wei Li, Kai Jiang, Dapeng Wu
Summary: TiO2@NH2-MIL-125(Ti) nanocomposites with unsaturated titanium-oxo clusters, mesoporous structure, and intimate interface were successfully constructed via an in-situ distilled water-etched route. The measurements showed improved charge separation efficiency and decreased transfer resistance within the heterojunction interfaces for TiO2@NH2-MIL-125(Ti) nanocomposites, facilitating the photoexcited electrons transfer and reduction of Cr(VI) species. The optimal TiO2@NH2-MIL-125(Ti) nanocomposite exhibited superior performance compared to NH2-MIL-125(Ti) and TiO2 derived from NH2-MIL-125(Ti). Based on free radical trapping experiment and electron paramagnetic resonance (EPR) measurements, a possible type-II scheme was proposed to explain the enhanced photocatalytic activity.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Environmental Sciences
Xiao Tan, Yinjie Zhang, Meng Liu, Jinman Cao, Guilan Duan, Jun Cui, Aijun Lin
Summary: In this study, a novel layered double hydroxide was prepared through ultrasonic-assisted co-precipitation method, which can efficiently remove Cr(VI) contamination in water and has good removal effects at different pH ranges. The results of the study indicate that U-Fe/Al-LDH is a promising remediation agent and a feasible method for Cr(VI) removal.
Article
Chemistry, Physical
Huoshuai Huang, Xin Jiang, Najun Li, Dongyun Chen, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu
Summary: The research focuses on the conversion of highly toxic hexavalent chromium to low-toxic trivalent chromium in the environment, and a dual noble-metal-free photocatalyst made of MXene and indium sulfide is prepared for ultrafast photocatalytic reduction. By effectively enhancing charge separation, the photocatalyst can completely reduce Cr(VI) to Cr(III) within 6 minutes with a fast rate constant.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Ningsi Wei, Jisheng Yang, Jianshuo Miao, Ruijing Jia, Zhiyong Qin
Summary: Using a one-step hydrothermal method, nitrogen-doped carbon quantum dots and TiO2 (N-CQDs/TiO2) nanoparticles were prepared using bovine serum albumin and tetrabutyl titanate, effectively degrading hexavalent chromium (Cr (VI)) pollutants. The N-CQDs reduced the band gap widths of TiO2 to 2.84 eV and successfully introduced N element and CQDs to TiO2. The obtained nanoparticles at a 1:1 mass ratio of BSA and TiO2, and a 48-hour hydrothermal reaction time, rapidly and efficiently degraded Cr (VI) in 40 minutes, with a reaction rate 10.7 times that of pure TiO2 nanoparticles. Additionally, the N-CQDs/TiO2 nanoparticles completely degraded Congo red dye and killed E. coli under simulated solar light.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Thi Xuan Quynh Nguyen, Shiao-Shing Chen, M. Pasawan, Hau-Ming Chang
Summary: Construction of a composite g-C3N4 and flower-like ZnO/BiOBr heterojunction photocatalyst is an optimal strategy for the enhancement of photocatalytic performance, reducing charge carrier recombination at the interface and expanding UV light absorption range, improving simultaneous oxidation of methyl orange (MO) and reduction of Cr(VI).
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Chemistry, Multidisciplinary
Shaojie Wu, Mingyang Li, Lili Xin, Hongming Long, Xiangpeng Gao
Summary: In this study, an asynchronous cross-linked triethylenetetramine modified sodium alginate (CFTS) was used as a photocatalyst for the simultaneous degradation of Cr(VI) and metronidazole (MNZ) under UV light irradiation. The removal efficiency of Cr(VI) and MNZ reached 99.5% and 100% respectively within a short period of time. The removal mechanisms involve electrostatic adsorption and photocatalytic reduction for Cr(VI), as well as photocatalytic oxidation for MNZ.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Thobile Masinga, Malvin Moyo, Vusumzi Emmanuel Pakade
Summary: This study investigates the use of PEI solution-impregnated activated carbon as a potential adsorbent for the removal of toxic Cr(VI) from water. The experimental results show that high removal efficiency can be achieved at pH 3, a contact time of 120 minutes, and a dosage concentration of 1 g L-1. Kinetic and isotherm models were applied to analyze the data, and a maximum adsorption capacity of 114 mg g-1 was obtained.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Environmental Sciences
Andriani Galani, Daniel Mamais, Constantinos Noutsopoulos, Petra Anastopoulou, Alexia Varouxaki
Summary: Stimulating indigenous microbial communities with reductive agents can effectively reduce hexavalent chromium contamination in aquifers, protecting public health and the environment. The addition of organic carbon and iron electron donors can significantly enhance the reduction rates and the overall removal of Cr(VI) from polluted groundwater.