Ha Ducnnh

Dr. Ha Ducnnh

orcid

Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 June 2017 in Applied Sciences
Verified
Journal Article
Open access
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Duong Duc LaDuong Duc La
Duong Duc La
RHRahul V. Hangarge
Rahul V. Hangarge
SBSidhanath V. Bhosale
Sidhanath V. Bhosale
HDHa Ducnnh
Ha Ducnnh
Lathe JonesLathe Jones
Lathe Jones
Sheshanath Vishwanath BhosaleSheshanath Vishwanath Bhosale
Sheshanath Vishwanath Bhosale
Porphyrin nanostructures with well-controlled size, shape and functionality can be used for visible-light photocatalysis. In this work, a graphene@porphyrin nanofibre composite was successfully fabricated via arginine-mediated self-assembly of tetrakis (4-carboxyphenyl) porphyrin (TCPP) on graphene nanoplates (GNPs). The formation and crystallisation of the graphene@porphyrin nanofibre composite was fully characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), fourier transform infrared (FTIR), ultraviolet-visible (UV-vis) and fluorescence spectroscopy. The assembled TCPP nanofibers were 50–200 nm in diameter with length in micrometers long, which were densely and uniformly distributed on the surface of graphene. The GNPs@TCPP nanofibers showed enhanced visible-light photocatalytic activity in comparison with free-standing TCPP nanorods for the degradation of Rhodamine B (RhB) and methyl orange (MO). The possible photodegradation mechanism of these dyes by the GNPs@TCPP nanofiber photocatalyst was proposed.

25 February 2019 in ChemistrySelect
Verified
Journal Article
Closed access
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HTHoai Phuong Nguyen Thi
Hoai Phuong Nguyen Thi
HDHa Ducnnh
Ha Ducnnh
CTChinh Van Tran
Chinh Van Tran
BLBac Thanh Le
Bac Thanh Le
Sheshanath Vishwanath BhosaleSheshanath Vishwanath Bhosale
Sheshanath Vishwanath Bhosale
Duong Duc LaDuong Duc La
Duong Duc La

1 October 2020 in Journal of Water Process Engineering
Verified
Journal Article
Open access
NTNgoc Tuan Truong
Ngoc Tuan Truong
Nguyen Thi Hoai PhuongNguyen Thi Hoai Phuong
Nguyen Thi Hoai Phuong
HDHa Ducnnh
Ha Ducnnh
XPXuan Thinh Phung
Xuan Thinh Phung
CTChinh Van Tran
Chinh Van Tran
Duong Duc LaDuong Duc La
Duong Duc La

16 December 2019 in Sustainability
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Journal Article
Open access
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Duong Duc LaDuong Duc La
Duong Duc La
TNTuan Anh Nguyen
Tuan Anh Nguyen
NTNguyen Thanh Tung
Nguyen Thanh Tung
HDHa Ducnnh
Ha Ducnnh
Nguyen Thi Hoai PhuongNguyen Thi Hoai Phuong
Nguyen Thi Hoai Phuong
Dinh Duc NguyenDinh Duc Nguyen
Dinh Duc Nguyen
In this work, graphene nanoplates (GNPs) were successfully prepared via direct chemical exfoliation from natural graphite. The properties of prepared GNPs were investigated using scanning electron microscopy and X-ray diffraction. The resultant GNPs had a low bulk density of 0.015 g mL−1, C content of 99.6%, a lateral diameter of 5–15 µm, and thickness of <15 nm, respectively. The absorption capacity of the GNPs for a range of oils and organic solvents including pump oil, polydimethylsiloxane oil (PDMS), dioctyl phthalates (DOP) oil, olive oil, bean oil, mazut oil, xylene, ethanol, and ethylene glycol (EG) was evaluated. The effects of the sorption conditions such as the absorption time (sorption kinetics), temperature, and aging manner (static, stirring, and ultrasonic) on the absorption capability of the GNPs were also investigated. It could be seen that the GNPs revealed extremely high absorption capacities for oil and organic solvents, reaching 21–42 times their own weight only after 2 min of absorption at room temperature, which were found to be much higher than those shown by various commercially available absorbents.

25 December 2023 in Journal of Military Science and Technology
Verified
Journal Article
Closed access
NTNgô Minh Tiến
Ngô Minh Tiến
NBNguyễn Văn Bằng
Nguyễn Văn Bằng
NTNguyễn Tài Trượng
Nguyễn Tài Trượng
NPNguyễn Thị Hoài Phương
Nguyễn Thị Hoài Phương
HDHa Ducnnh
Ha Ducnnh
Trong bài báo này, nghiên cứu ảnh hưởng của một số chế độ hóa già khác nhau đến đặc trưng cơ học và ăn mòn của tấm hợp kim nhôm biến dạng độ bền cao hệ 7075 được chế tạo trong nước. Một số chế độ xử lý nhiệt được nghiên cứu như: hóa già tự nhiên (HGTN), hóa già truyền thống T6, quá hóa già T76, hóa già 3 cấp RRA và hóa già gián đoạn T6I6 được thực hiện nghiên cứu. Hợp kim nhôm hệ 7075 sau mỗi chế độ hóa già khác nhau được tiến hành đánh giá đặc trưng tính chất: cơ tính, ăn mòn phun muối và ăn mòn điện hóa. Tấm hợp kim nhôm biến dạng độ bền cao hệ 7075 sau mỗi chế độ hóa già khác nhau cho các tính chất cơ học, hóa học khác nhau, tùy thuộc yêu cầu sử dụng, lựa chọn chế độ phù hợp: chế độ hóa già T6I6 cho độ bền cơ tính cao nhất, giới hạn bền kéo đạt 630 MPa, độ cứng 91 HRB; chế độ quá hóa già T76 cho khả năng chống ăn mòn môi trường nước biển tốt nhất; chế độ hóa già 3 cấp RRA đảm bảo đồng thời độ bền cơ tính và khả năng chống ăn mòn tốt.